# -*- coding: utf-8 -*-
# Part of Odoo. See LICENSE file for full copyright and licensing details.

import logging
import threading
from datetime import date, datetime, timedelta
from psycopg2 import sql

from odoo import api, fields, models, tools, SUPERUSER_ID
from odoo.osv import expression
from odoo.tools.translate import _
from odoo.tools import email_re, email_split
from odoo.exceptions import UserError, AccessError
from odoo.addons.phone_validation.tools import phone_validation
from collections import OrderedDict, defaultdict

from . import crm_stage

_logger = logging.getLogger(__name__)

CRM_LEAD_FIELDS_TO_MERGE = [
    'name',
    'partner_id',
    'campaign_id',
    'company_id',
    'country_id',
    'team_id',
    'state_id',
    'stage_id',
    'medium_id',
    'source_id',
    'user_id',
    'title',
    'city',
    'contact_name',
    'description',
    'mobile',
    'partner_name',
    'phone',
    'probability',
    'expected_revenue',
    'street',
    'street2',
    'zip',
    'create_date',
    'date_action_last',
    'email_from',
    'email_cc',
    'website']

# Subset of partner fields: sync any of those
PARTNER_FIELDS_TO_SYNC = [
    'mobile',
    'title',
    'function',
    'website',
]

# Subset of partner fields: sync all or none to avoid mixed addresses
PARTNER_ADDRESS_FIELDS_TO_SYNC = [
    'street',
    'street2',
    'city',
    'zip',
    'state_id',
    'country_id',
]

# Those values have been determined based on benchmark to minimise
# computation time, number of transaction and transaction time.
PLS_COMPUTE_BATCH_STEP = 50000  # odoo.models.PREFETCH_MAX = 1000 but larger cluster can speed up global computation
PLS_UPDATE_BATCH_STEP = 5000


class Lead(models.Model):
    _name = "crm.lead"
    _description = "Lead/Opportunity"
    _order = "priority desc, id desc"
    _inherit = ['mail.thread.cc',
                'mail.thread.blacklist',
                'mail.thread.phone',
                'mail.activity.mixin',
                'utm.mixin',
                'format.address.mixin',
                'phone.validation.mixin']
    _primary_email = 'email_from'

    # Description
    name = fields.Char(
        'Opportunity', index=True, required=True,
        compute='_compute_name', readonly=False, store=True)
    user_id = fields.Many2one('res.users', string='Salesperson', index=True, tracking=True, default=lambda self: self.env.user)
    user_email = fields.Char('User Email', related='user_id.email', readonly=True)
    user_login = fields.Char('User Login', related='user_id.login', readonly=True)
    company_id = fields.Many2one('res.company', string='Company', index=True, default=lambda self: self.env.company.id)
    referred = fields.Char('Referred By')
    description = fields.Text('Notes')
    active = fields.Boolean('Active', default=True, tracking=True)
    type = fields.Selection([
        ('lead', 'Lead'), ('opportunity', 'Opportunity')],
        index=True, required=True, tracking=15,
        default=lambda self: 'lead' if self.env['res.users'].has_group('crm.group_use_lead') else 'opportunity')
    priority = fields.Selection(
        crm_stage.AVAILABLE_PRIORITIES, string='Priority', index=True,
        default=crm_stage.AVAILABLE_PRIORITIES[0][0])
    team_id = fields.Many2one(
        'crm.team', string='Sales Team', index=True, tracking=True,
        compute='_compute_team_id', readonly=False, store=True)
    stage_id = fields.Many2one(
        'crm.stage', string='Stage', index=True, tracking=True,
        compute='_compute_stage_id', readonly=False, store=True,
        copy=False, group_expand='_read_group_stage_ids', ondelete='restrict',
        domain="['|', ('team_id', '=', False), ('team_id', '=', team_id)]")
    kanban_state = fields.Selection([
        ('grey', 'No next activity planned'),
        ('red', 'Next activity late'),
        ('green', 'Next activity is planned')], string='Kanban State',
        compute='_compute_kanban_state')
    activity_date_deadline_my = fields.Date(
        'My Activities Deadline', compute='_compute_activity_date_deadline_my',
        search='_search_activity_date_deadline_my', compute_sudo=False,
        readonly=True, store=False, groups="base.group_user")
    tag_ids = fields.Many2many(
        'crm.tag', 'crm_tag_rel', 'lead_id', 'tag_id', string='Tags',
        help="Classify and analyze your lead/opportunity categories like: Training, Service")
    color = fields.Integer('Color Index', default=0)
    # Opportunity specific
    expected_revenue = fields.Monetary('Expected Revenue', currency_field='company_currency', tracking=True)
    prorated_revenue = fields.Monetary('Prorated Revenue', currency_field='company_currency', store=True, compute="_compute_prorated_revenue")
    recurring_revenue = fields.Monetary('Recurring Revenues', currency_field='company_currency', groups="crm.group_use_recurring_revenues")
    recurring_plan = fields.Many2one('crm.recurring.plan', string="Recurring Plan", groups="crm.group_use_recurring_revenues")
    recurring_revenue_monthly = fields.Monetary('Expected MRR', currency_field='company_currency', store=True,
                                               compute="_compute_recurring_revenue_monthly",
                                               groups="crm.group_use_recurring_revenues")
    recurring_revenue_monthly_prorated = fields.Monetary('Prorated MRR', currency_field='company_currency', store=True,
                                               compute="_compute_recurring_revenue_monthly_prorated",
                                               groups="crm.group_use_recurring_revenues")
    company_currency = fields.Many2one("res.currency", string='Currency', related='company_id.currency_id', readonly=True)
    # Dates
    date_closed = fields.Datetime('Closed Date', readonly=True, copy=False)
    date_action_last = fields.Datetime('Last Action', readonly=True)
    date_open = fields.Datetime(
        'Assignment Date', compute='_compute_date_open', readonly=True, store=True)
    day_open = fields.Float('Days to Assign', compute='_compute_day_open', store=True)
    day_close = fields.Float('Days to Close', compute='_compute_day_close', store=True)
    date_last_stage_update = fields.Datetime(
        'Last Stage Update', compute='_compute_date_last_stage_update', index=True, readonly=True, store=True)
    date_conversion = fields.Datetime('Conversion Date', readonly=True)
    date_deadline = fields.Date('Expected Closing', help="Estimate of the date on which the opportunity will be won.")
    # Customer / contact
    partner_id = fields.Many2one(
        'res.partner', string='Customer', index=True, tracking=10,
        domain="['|', ('company_id', '=', False), ('company_id', '=', company_id)]",
        help="Linked partner (optional). Usually created when converting the lead. You can find a partner by its Name, TIN, Email or Internal Reference.")
    partner_is_blacklisted = fields.Boolean('Partner is blacklisted', related='partner_id.is_blacklisted', readonly=True)
    contact_name = fields.Char(
        'Contact Name', tracking=30,
        compute='_compute_partner_id_values', readonly=False, store=True)
    partner_name = fields.Char(
        'Company Name', tracking=20, index=True,
        compute='_compute_partner_id_values', readonly=False, store=True,
        help='The name of the future partner company that will be created while converting the lead into opportunity')
    function = fields.Char('Job Position', compute='_compute_partner_id_values', readonly=False, store=True)
    title = fields.Many2one('res.partner.title', string='Title',compute='_compute_partner_id_values', readonly=False, store=True)
    email_from = fields.Char(
        'Email', tracking=40, index=True,
        compute='_compute_email_from', inverse='_inverse_email_from', readonly=False, store=True)
    phone = fields.Char(
        'Phone', tracking=50,
        compute='_compute_phone', inverse='_inverse_phone', readonly=False, store=True)
    mobile = fields.Char('Mobile', compute='_compute_partner_id_values', readonly=False, store=True)
    phone_mobile_search = fields.Char('Phone/Mobile', store=False, search='_search_phone_mobile_search')
    phone_state = fields.Selection([
        ('correct', 'Correct'),
        ('incorrect', 'Incorrect')], string='Phone Quality', compute="_compute_phone_state", store=True)
    email_state = fields.Selection([
        ('correct', 'Correct'),
        ('incorrect', 'Incorrect')], string='Email Quality', compute="_compute_email_state", store=True)
    website = fields.Char('Website', index=True, help="Website of the contact", compute="_compute_partner_id_values", store=True, readonly=False)
    lang_id = fields.Many2one('res.lang', string='Language')
    # Address fields
    street = fields.Char('Street', compute='_compute_partner_id_values', readonly=False, store=True)
    street2 = fields.Char('Street2', compute='_compute_partner_id_values', readonly=False, store=True)
    zip = fields.Char('Zip', change_default=True, compute='_compute_partner_id_values', readonly=False, store=True)
    city = fields.Char('City', compute='_compute_partner_id_values', readonly=False, store=True)
    state_id = fields.Many2one(
        "res.country.state", string='State',
        compute='_compute_partner_id_values', readonly=False, store=True,
        domain="[('country_id', '=?', country_id)]")
    country_id = fields.Many2one(
        'res.country', string='Country',
        compute='_compute_partner_id_values', readonly=False, store=True)
    # Probability (Opportunity only)
    probability = fields.Float(
        'Probability', group_operator="avg", copy=False,
        compute='_compute_probabilities', readonly=False, store=True)
    automated_probability = fields.Float('Automated Probability', compute='_compute_probabilities', readonly=True, store=True)
    is_automated_probability = fields.Boolean('Is automated probability?', compute="_compute_is_automated_probability")
    # External records
    meeting_count = fields.Integer('# Meetings', compute='_compute_meeting_count')
    lost_reason = fields.Many2one(
        'crm.lost.reason', string='Lost Reason',
        index=True, ondelete='restrict', tracking=True)
    ribbon_message = fields.Char('Ribbon message', compute='_compute_ribbon_message')

    _sql_constraints = [
        ('check_probability', 'check(probability >= 0 and probability <= 100)', 'The probability of closing the deal should be between 0% and 100%!')
    ]

    @api.depends('activity_date_deadline')
    def _compute_kanban_state(self):
        today = date.today()
        for lead in self:
            kanban_state = 'grey'
            if lead.activity_date_deadline:
                lead_date = fields.Date.from_string(lead.activity_date_deadline)
                if lead_date >= today:
                    kanban_state = 'green'
                else:
                    kanban_state = 'red'
            lead.kanban_state = kanban_state

    @api.depends('activity_ids.date_deadline')
    @api.depends_context('uid')
    def _compute_activity_date_deadline_my(self):
        todo_activities = []
        if self.ids:
            todo_activities = self.env['mail.activity'].search([
                ('user_id', '=', self._uid),
                ('res_model', '=', self._name),
                ('res_id', 'in', self.ids)
            ], order='date_deadline ASC')

        for record in self:
            record.activity_date_deadline_my = next(
                (activity.date_deadline for activity in todo_activities if activity.res_id == record.id),
                False
            )

    def _search_activity_date_deadline_my(self, operator, operand):
        return ['&', ('activity_ids.user_id', '=', self._uid), ('activity_ids.date_deadline', operator, operand)]

    @api.depends('user_id', 'type')
    def _compute_team_id(self):
        """ When changing the user, also set a team_id or restrict team id
        to the ones user_id is member of. """
        for lead in self:
            # setting user as void should not trigger a new team computation
            if not lead.user_id:
                continue
            user = lead.user_id
            if lead.team_id and user in lead.team_id.member_ids | lead.team_id.user_id:
                continue
            team_domain = [('use_leads', '=', True)] if lead.type == 'lead' else [('use_opportunities', '=', True)]
            team = self.env['crm.team']._get_default_team_id(user_id=user.id, domain=team_domain)
            lead.team_id = team.id

    @api.depends('team_id', 'type')
    def _compute_stage_id(self):
        for lead in self:
            if not lead.stage_id:
                lead.stage_id = lead._stage_find(domain=[('fold', '=', False)]).id

    @api.depends('user_id')
    def _compute_date_open(self):
        for lead in self:
            lead.date_open = fields.Datetime.now() if lead.user_id else False

    @api.depends('stage_id')
    def _compute_date_last_stage_update(self):
        for lead in self:
            lead.date_last_stage_update = fields.Datetime.now()

    @api.depends('create_date', 'date_open')
    def _compute_day_open(self):
        """ Compute difference between create date and open date """
        leads = self.filtered(lambda l: l.date_open and l.create_date)
        others = self - leads
        others.day_open = None
        for lead in leads:
            date_create = fields.Datetime.from_string(lead.create_date).replace(microsecond=0)
            date_open = fields.Datetime.from_string(lead.date_open)
            lead.day_open = abs((date_open - date_create).days)

    @api.depends('create_date', 'date_closed')
    def _compute_day_close(self):
        """ Compute difference between current date and log date """
        leads = self.filtered(lambda l: l.date_closed and l.create_date)
        others = self - leads
        others.day_close = None
        for lead in leads:
            date_create = fields.Datetime.from_string(lead.create_date)
            date_close = fields.Datetime.from_string(lead.date_closed)
            lead.day_close = abs((date_close - date_create).days)

    @api.depends('partner_id')
    def _compute_name(self):
        for lead in self:
            if not lead.name and lead.partner_id and lead.partner_id.name:
                lead.name = _("%s's opportunity") % lead.partner_id.name

    @api.depends('partner_id')
    def _compute_partner_id_values(self):
        """ compute the new values when partner_id has changed """
        for lead in self:
            lead.update(lead._prepare_values_from_partner(lead.partner_id))

    @api.depends('partner_id.email')
    def _compute_email_from(self):
        for lead in self:
            if lead.partner_id.email and lead.partner_id.email != lead.email_from:
                lead.email_from = lead.partner_id.email

    def _inverse_email_from(self):
        for lead in self:
            if lead.partner_id and lead.email_from != lead.partner_id.email:
                lead.partner_id.email = lead.email_from

    @api.depends('partner_id.phone')
    def _compute_phone(self):
        for lead in self:
            if lead.partner_id.phone and lead.phone != lead.partner_id.phone:
                lead.phone = lead.partner_id.phone

    def _inverse_phone(self):
        for lead in self:
            if lead.partner_id and lead.phone != lead.partner_id.phone:
                # force reset
                if not lead.phone or not lead.partner_id.phone:
                    lead.partner_id.phone = lead.phone
                # compare formatted values as we may have encoding differences between equivalent numbers
                else:
                    lead_phone_formatted = lead.phone_format(lead.phone)
                    partner_phone_formatted = lead.phone_format(lead.partner_id.phone)
                    if lead_phone_formatted != partner_phone_formatted:
                        lead.partner_id.phone = lead.phone

    @api.depends('phone', 'country_id.code')
    def _compute_phone_state(self):
        for lead in self:
            phone_status = False
            if lead.phone:
                country_code = lead.country_id.code if lead.country_id and lead.country_id.code else None
                try:
                    if phone_validation.phone_parse(lead.phone, country_code):  # otherwise library not installed
                        phone_status = 'correct'
                except UserError:
                    phone_status = 'incorrect'
            lead.phone_state = phone_status

    @api.depends('email_from')
    def _compute_email_state(self):
        for lead in self:
            email_state = False
            if lead.email_from:
                email_state = 'incorrect'
                for email in email_split(lead.email_from):
                    if tools.email_normalize(email):
                        email_state = 'correct'
                        break
            lead.email_state = email_state

    @api.depends('probability', 'automated_probability')
    def _compute_is_automated_probability(self):
        """ If probability and automated_probability are equal probability computation
        is considered as automatic, aka probability is sync with automated_probability """
        for lead in self:
            lead.is_automated_probability = tools.float_compare(lead.probability, lead.automated_probability, 2) == 0

    @api.depends(lambda self: ['stage_id', 'team_id'] + self._pls_get_safe_fields())
    def _compute_probabilities(self):
        lead_probabilities = self._pls_get_naive_bayes_probabilities()
        for lead in self:
            if lead.id in lead_probabilities:
                was_automated = lead.active and lead.is_automated_probability
                lead.automated_probability = lead_probabilities[lead.id]
                if was_automated:
                    lead.probability = lead.automated_probability

    @api.depends('expected_revenue', 'probability')
    def _compute_prorated_revenue(self):
        for lead in self:
            lead.prorated_revenue = round((lead.expected_revenue or 0.0) * (lead.probability or 0) / 100.0, 2)

    @api.depends('recurring_revenue', 'recurring_plan.number_of_months')
    def _compute_recurring_revenue_monthly(self):
        for lead in self:
            lead.recurring_revenue_monthly = (lead.recurring_revenue or 0.0) / (lead.recurring_plan.number_of_months or 1)

    @api.depends('recurring_revenue_monthly', 'probability')
    def _compute_recurring_revenue_monthly_prorated(self):
        for lead in self:
            lead.recurring_revenue_monthly_prorated = (lead.recurring_revenue_monthly or 0.0) * (lead.probability or 0) / 100.0

    def _compute_meeting_count(self):
        if self.ids:
            meeting_data = self.env['calendar.event'].sudo().read_group([
                ('opportunity_id', 'in', self.ids)
            ], ['opportunity_id'], ['opportunity_id'])
            mapped_data = {m['opportunity_id'][0]: m['opportunity_id_count'] for m in meeting_data}
        else:
            mapped_data = dict()
        for lead in self:
            lead.meeting_count = mapped_data.get(lead.id, 0)

    @api.depends('email_from', 'phone', 'partner_id')
    def _compute_ribbon_message(self):
        for lead in self:
            will_write_email = lead.partner_id and lead.email_from != lead.partner_id.email
            will_write_phone = False
            if lead.partner_id and lead.phone != lead.partner_id.phone:
                # if reset -> obviously new value will be propagated
                if not lead.phone or not lead.partner_id.phone:
                    will_write_phone = True
                # otherwise compare formatted values as we may have encoding differences
                else:
                    lead_phone_formatted = lead.phone_format(lead.phone)
                    partner_phone_formatted = lead.phone_format(lead.partner_id.phone)
                    if lead_phone_formatted != partner_phone_formatted:
                        will_write_phone = True

            if will_write_email and will_write_phone:
                lead.ribbon_message = _('By saving this change, the customer email and phone number will also be updated.')
            elif will_write_email:
                lead.ribbon_message = _('By saving this change, the customer email will also be updated.')
            elif will_write_phone:
                lead.ribbon_message = _('By saving this change, the customer phone number will also be updated.')
            else:
                lead.ribbon_message = False

    def _search_phone_mobile_search(self, operator, value):
        if len(value) <= 2:
            raise UserError(_('Please enter at least 3 digits when searching on phone / mobile.'))

        query = f"""
                SELECT model.id
                FROM {self._table} model
                WHERE REGEXP_REPLACE(model.phone, '[^\d+]+', '', 'g') SIMILAR TO CONCAT(%s, REGEXP_REPLACE(%s, '\D+', '', 'g'), '%%')
                  OR REGEXP_REPLACE(model.mobile, '[^\d+]+', '', 'g') SIMILAR TO CONCAT(%s, REGEXP_REPLACE(%s, '\D+', '', 'g'), '%%')
            """

        # searching on +32485112233 should also finds 00485112233 (00 / + prefix are both valid)
        # we therefore remove it from input value and search for both of them in db
        if value.startswith('+') or value.startswith('00'):
            value = value.replace('+', '').replace('00', '', 1)
            starts_with = '00|\+'
        else:
            starts_with = '%'

        self._cr.execute(query, (starts_with, value, starts_with, value))
        res = self._cr.fetchall()
        if not res:
            return [(0, '=', 1)]
        return [('id', 'in', [r[0] for r in res])]

    @api.onchange('phone', 'country_id', 'company_id')
    def _onchange_phone_validation(self):
        if self.phone:
            self.phone = self.phone_format(self.phone)

    @api.onchange('mobile', 'country_id', 'company_id')
    def _onchange_mobile_validation(self):
        if self.mobile:
            self.mobile = self.phone_format(self.mobile)

    def _prepare_values_from_partner(self, partner):
        """ Get a dictionary with values coming from partner information to
        copy on a lead. Non-address fields get the current lead
        values to avoid being reset if partner has no value for them. """

        # Sync all address fields from partner, or none, to avoid mixing them.
        if any(partner[f] for f in PARTNER_ADDRESS_FIELDS_TO_SYNC):
            values = {f: partner[f] for f in PARTNER_ADDRESS_FIELDS_TO_SYNC}
        else:
            values = {f: self[f] for f in PARTNER_ADDRESS_FIELDS_TO_SYNC}

        # For other fields, get the info from the partner, but only if set
        values.update({f: partner[f] or self[f] for f in PARTNER_FIELDS_TO_SYNC})

        # Fields with specific logic
        partner_name = partner.parent_id.name
        if not partner_name and partner.is_company:
            partner_name = partner.name
        contact_name = False if partner.is_company else partner.name
        values.update({
            'partner_name': partner_name or self.partner_name,
            'contact_name': contact_name or self.contact_name,
        })
        return self._convert_to_write(values)

    # ------------------------------------------------------------
    # ORM
    # ------------------------------------------------------------

    def _auto_init(self):
        res = super(Lead, self)._auto_init()
        tools.create_index(self._cr, 'crm_lead_user_id_team_id_type_index',
                           self._table, ['user_id', 'team_id', 'type'])
        tools.create_index(self._cr, 'crm_lead_create_date_team_id_idx',
                           self._table, ['create_date', 'team_id'])
        return res

    @api.model_create_multi
    def create(self, vals_list):
        for vals in vals_list:
            if vals.get('website'):
                vals['website'] = self.env['res.partner']._clean_website(vals['website'])
        leads = super(Lead, self).create(vals_list)

        for lead, values in zip(leads, vals_list):
            if any(field in ['active', 'stage_id'] for field in values):
                lead._handle_won_lost(vals)

        return leads

    def write(self, vals):
        if vals.get('website'):
            vals['website'] = self.env['res.partner']._clean_website(vals['website'])

        # stage change: update date_last_stage_update
        if 'stage_id' in vals:
            stage_id = self.env['crm.stage'].browse(vals['stage_id'])
            if stage_id.is_won:
                vals.update({'probability': 100, 'automated_probability': 100})

        # stage change with new stage: update probability and date_closed
        if vals.get('probability', 0) >= 100 or not vals.get('active', True):
            vals['date_closed'] = fields.Datetime.now()
        elif 'probability' in vals:
            vals['date_closed'] = False

        if any(field in ['active', 'stage_id'] for field in vals):
            self._handle_won_lost(vals)

        write_result = super(Lead, self).write(vals)

        return write_result

    @api.model
    def search(self, args, offset=0, limit=None, order=None, count=False):
        """ Override to support ordering on activity_date_deadline_my.

        Ordering through web client calls search_read with an order parameter set.
        Search_read then calls search. In this override we therefore override search
        to intercept a search without count with an order on activity_date_deadline_my.
        In that case we do the search in two steps.

        First step: fill with deadline-based results

          * Perform a read_group on my activities to get a mapping lead_id / deadline
            Remember date_deadline is required, we always have a value for it. Only
            the earliest deadline per lead is kept.
          * Search leads linked to those activities that also match the asked domain
            and order from the original search request.
          * Results of that search will be at the top of returned results. Use limit
            None because we have to search all leads linked to activities as ordering
            on deadline is done in post processing.
          * Reorder them according to deadline asc or desc depending on original
            search ordering. Finally take only a subset of those leads to fill with
            results matching asked offset / limit.

        Second step: fill with other results. If first step does not gives results
        enough to match offset and limit parameters we fill with a search on other
        leads. We keep the asked domain and ordering while filtering out already
        scanned leads to keep a coherent results.

        All other search and search_read are left untouched by this override to avoid
        side effects. Search_count is not affected by this override.
        """
        if count or not order or 'activity_date_deadline_my' not in order:
            return super(Lead, self).search(args, offset=offset, limit=limit, order=order, count=count)
        order_items = [order_item.strip().lower() for order_item in (order or self._order).split(',')]

        # Perform a read_group on my activities to get a mapping lead_id / deadline
        # Remember date_deadline is required, we always have a value for it. Only
        # the earliest deadline per lead is kept.
        activity_asc = any('activity_date_deadline_my asc' in item for item in order_items)
        my_lead_activities = self.env['mail.activity'].read_group(
            [('res_model', '=', self._name), ('user_id', '=', self.env.uid)],
            ['res_id', 'date_deadline:min'],
            ['res_id'],
            orderby='date_deadline ASC'
        )
        my_lead_mapping = dict((item['res_id'], item['date_deadline']) for item in my_lead_activities)
        my_lead_ids = list(my_lead_mapping.keys())
        my_lead_domain = expression.AND([[('id', 'in', my_lead_ids)], args])
        my_lead_order = ', '.join(item for item in order_items if 'activity_date_deadline_my' not in item)

        # Search leads linked to those activities and order them. See docstring
        # of this method for more details.
        search_res = super(Lead, self).search(my_lead_domain, offset=0, limit=None, order=my_lead_order, count=count)
        my_lead_ids_ordered = sorted(search_res.ids, key=lambda lead_id: my_lead_mapping[lead_id], reverse=not activity_asc)
        # keep only requested window (offset + limit, or offset+)
        my_lead_ids_keep = my_lead_ids_ordered[offset:(offset + limit)] if limit else my_lead_ids_ordered[offset:]
        # keep list of already skipped lead ids to exclude them from future search
        my_lead_ids_skip = my_lead_ids_ordered[:(offset + limit)] if limit else my_lead_ids_ordered

        # do not go further if limit is achieved
        if limit and len(my_lead_ids_keep) >= limit:
            return self.browse(my_lead_ids_keep)

        # Fill with remaining leads. If a limit is given, simply remove count of
        # already fetched. Otherwise keep none. If an offset is set we have to
        # reduce it by already fetch results hereabove. Order is updated to exclude
        # activity_date_deadline_my when calling super() .
        lead_limit = (limit - len(my_lead_ids_keep)) if limit else None
        if offset:
            lead_offset = max((offset - len(search_res), 0))
        else:
            lead_offset = 0
        lead_order = ', '.join(item for item in order_items if 'activity_date_deadline_my' not in item)

        other_lead_res = super(Lead, self).search(
            expression.AND([[('id', 'not in', my_lead_ids_skip)], args]),
            offset=lead_offset, limit=lead_limit, order=lead_order, count=count
        )
        return self.browse(my_lead_ids_keep) + other_lead_res

    def _handle_won_lost(self, vals):
        """ This method handle the state changes :
        - To lost : We need to increment corresponding lost count in scoring frequency table
        - To won : We need to increment corresponding won count in scoring frequency table
        - From lost to Won : We need to decrement corresponding lost count + increment corresponding won count
        in scoring frequency table.
        - From won to lost : We need to decrement corresponding won count + increment corresponding lost count
        in scoring frequency table."""
        Lead = self.env['crm.lead']
        leads_reach_won = Lead
        leads_leave_won = Lead
        leads_reach_lost = Lead
        leads_leave_lost = Lead
        won_stage_ids = self.env['crm.stage'].search([('is_won', '=', True)]).ids
        for lead in self:
            if 'stage_id' in vals:
                if vals['stage_id'] in won_stage_ids:
                    if lead.probability == 0:
                        leads_leave_lost |= lead
                    leads_reach_won |= lead
                elif lead.stage_id.id in won_stage_ids and lead.active:  # a lead can be lost at won_stage
                    leads_leave_won |= lead
            if 'active' in vals:
                if not vals['active'] and lead.active:  # archive lead
                    if lead.stage_id.id in won_stage_ids and lead not in leads_leave_won:
                        leads_leave_won |= lead
                    leads_reach_lost |= lead
                elif vals['active'] and not lead.active:  # restore lead
                    leads_leave_lost |= lead

        leads_reach_won._pls_increment_frequencies(to_state='won')
        leads_leave_won._pls_increment_frequencies(from_state='won')
        leads_reach_lost._pls_increment_frequencies(to_state='lost')
        leads_leave_lost._pls_increment_frequencies(from_state='lost')

    @api.returns('self', lambda value: value.id)
    def copy(self, default=None):
        self.ensure_one()
        # set default value in context, if not already set (Put stage to 'new' stage)
        context = dict(self._context)
        context.setdefault('default_type', self.type)
        context.setdefault('default_team_id', self.team_id.id)
        # Set date_open to today if it is an opp
        default = default or {}
        default['date_open'] = fields.Datetime.now() if self.type == 'opportunity' else False
        # Do not assign to an archived user
        if not self.user_id.active:
            default['user_id'] = False
        if not self.env.user.has_group('crm.group_use_recurring_revenues'):
            default['recurring_revenue'] = 0
            default['recurring_plan'] = False
        return super(Lead, self.with_context(context)).copy(default=default)

    @api.model
    def _fields_view_get(self, view_id=None, view_type='form', toolbar=False, submenu=False):
        if self._context.get('opportunity_id'):
            opportunity = self.browse(self._context['opportunity_id'])
            action = opportunity.get_formview_action()
            if action.get('views') and any(view_id for view_id in action['views'] if view_id[1] == view_type):
                view_id = next(view_id[0] for view_id in action['views'] if view_id[1] == view_type)
        res = super(Lead, self)._fields_view_get(view_id=view_id, view_type=view_type, toolbar=toolbar, submenu=submenu)
        if view_type == 'form':
            res['arch'] = self._fields_view_get_address(res['arch'])
        return res

    @api.model
    def _read_group_stage_ids(self, stages, domain, order):
        # retrieve team_id from the context and write the domain
        # - ('id', 'in', stages.ids): add columns that should be present
        # - OR ('fold', '=', False): add default columns that are not folded
        # - OR ('team_ids', '=', team_id), ('fold', '=', False) if team_id: add team columns that are not folded
        team_id = self._context.get('default_team_id')
        if team_id:
            search_domain = ['|', ('id', 'in', stages.ids), '|', ('team_id', '=', False), ('team_id', '=', team_id)]
        else:
            search_domain = ['|', ('id', 'in', stages.ids), ('team_id', '=', False)]

        # perform search
        stage_ids = stages._search(search_domain, order=order, access_rights_uid=SUPERUSER_ID)
        return stages.browse(stage_ids)

    def _stage_find(self, team_id=False, domain=None, order='sequence'):
        """ Determine the stage of the current lead with its teams, the given domain and the given team_id
            :param team_id
            :param domain : base search domain for stage
            :returns crm.stage recordset
        """
        # collect all team_ids by adding given one, and the ones related to the current leads
        team_ids = set()
        if team_id:
            team_ids.add(team_id)
        for lead in self:
            if lead.team_id:
                team_ids.add(lead.team_id.id)
        # generate the domain
        if team_ids:
            search_domain = ['|', ('team_id', '=', False), ('team_id', 'in', list(team_ids))]
        else:
            search_domain = [('team_id', '=', False)]
        # AND with the domain in parameter
        if domain:
            search_domain += list(domain)
        # perform search, return the first found
        return self.env['crm.stage'].search(search_domain, order=order, limit=1)

    # ------------------------------------------------------------
    # ACTIONS
    # ------------------------------------------------------------

    def toggle_active(self):
        """ When archiving: mark probability as 0. When re-activating
        update probability again, for leads and opportunities. """
        res = super(Lead, self).toggle_active()
        activated = self.filtered(lambda lead: lead.active)
        archived = self.filtered(lambda lead: not lead.active)
        if activated:
            activated.write({'lost_reason': False})
            activated._compute_probabilities()
        if archived:
            archived.write({'probability': 0, 'automated_probability': 0})
        return res

    def action_set_lost(self, **additional_values):
        """ Lost semantic: probability = 0 or active = False """
        res = self.action_archive()
        if additional_values:
            self.write(dict(additional_values))
        return res

    def action_set_won(self):
        """ Won semantic: probability = 100 (active untouched) """
        self.action_unarchive()
        # group the leads by team_id, in order to write once by values couple (each write leads to frequency increment)
        leads_by_won_stage = {}
        for lead in self:
            stage_id = lead._stage_find(domain=[('is_won', '=', True)])
            if stage_id in leads_by_won_stage:
                leads_by_won_stage[stage_id] |= lead
            else:
                leads_by_won_stage[stage_id] = lead
        for won_stage_id, leads in leads_by_won_stage.items():
            leads.write({'stage_id': won_stage_id.id, 'probability': 100})
        return True

    def action_set_automated_probability(self):
        self.write({'probability': self.automated_probability})

    def action_set_won_rainbowman(self):
        self.ensure_one()
        self.action_set_won()

        message = self._get_rainbowman_message()
        if message:
            return {
                'effect': {
                    'fadeout': 'slow',
                    'message': message,
                    'img_url': '/web/image/%s/%s/image_1024' % (self.team_id.user_id._name, self.team_id.user_id.id) if self.team_id.user_id.image_1024 else '/web/static/src/img/smile.svg',
                    'type': 'rainbow_man',
                }
            }
        return True

    def get_rainbowman_message(self):
        self.ensure_one()
        if self.stage_id.is_won:
            return self._get_rainbowman_message()
        return False

    def _get_rainbowman_message(self):
        message = False
        if self.user_id and self.team_id and self.expected_revenue:
            self.flush()  # flush fields to make sure DB is up to date
            query = """
                SELECT
                    SUM(CASE WHEN user_id = %(user_id)s THEN 1 ELSE 0 END) as total_won,
                    MAX(CASE WHEN date_closed >= CURRENT_DATE - INTERVAL '30 days' AND user_id = %(user_id)s THEN expected_revenue ELSE 0 END) as max_user_30,
                    MAX(CASE WHEN date_closed >= CURRENT_DATE - INTERVAL '7 days' AND user_id = %(user_id)s THEN expected_revenue ELSE 0 END) as max_user_7,
                    MAX(CASE WHEN date_closed >= CURRENT_DATE - INTERVAL '30 days' AND team_id = %(team_id)s THEN expected_revenue ELSE 0 END) as max_team_30,
                    MAX(CASE WHEN date_closed >= CURRENT_DATE - INTERVAL '7 days' AND team_id = %(team_id)s THEN expected_revenue ELSE 0 END) as max_team_7
                FROM crm_lead
                WHERE
                    type = 'opportunity'
                AND
                    active = True
                AND
                    probability = 100
                AND
                    DATE_TRUNC('year', date_closed) = DATE_TRUNC('year', CURRENT_DATE)
                AND
                    (user_id = %(user_id)s OR team_id = %(team_id)s)
            """
            self.env.cr.execute(query, {'user_id': self.user_id.id,
                                        'team_id': self.team_id.id})
            query_result = self.env.cr.dictfetchone()

            if query_result['total_won'] == 1:
                message = _('Go, go, go! Congrats for your first deal.')
            elif query_result['max_team_30'] == self.expected_revenue:
                message = _('Boom! Team record for the past 30 days.')
            elif query_result['max_team_7'] == self.expected_revenue:
                message = _('Yeah! Deal of the last 7 days for the team.')
            elif query_result['max_user_30'] == self.expected_revenue:
                message = _('You just beat your personal record for the past 30 days.')
            elif query_result['max_user_7'] == self.expected_revenue:
                message = _('You just beat your personal record for the past 7 days.')
        return message

    def action_schedule_meeting(self):
        """ Open meeting's calendar view to schedule meeting on current opportunity.
            :return dict: dictionary value for created Meeting view
        """
        self.ensure_one()
        action = self.env["ir.actions.actions"]._for_xml_id("calendar.action_calendar_event")
        partner_ids = self.env.user.partner_id.ids
        if self.partner_id:
            partner_ids.append(self.partner_id.id)
        action['context'] = {
            'default_opportunity_id': self.id if self.type == 'opportunity' else False,
            'default_partner_id': self.partner_id.id,
            'default_partner_ids': partner_ids,
            'default_team_id': self.team_id.id,
            'default_name': self.name,
        }
        return action

    def action_snooze(self):
        self.ensure_one()
        today = date.today()
        my_next_activity = self.activity_ids.filtered(lambda activity: activity.user_id == self.env.user)[:1]
        if my_next_activity:
            if my_next_activity.date_deadline < today:
                date_deadline = today + timedelta(days=7)
            else:
                date_deadline = my_next_activity.date_deadline + timedelta(days=7)
            my_next_activity.write({
                'date_deadline': date_deadline
            })
        return True

    # ------------------------------------------------------------
    # BUSINESS
    # ------------------------------------------------------------

    def log_meeting(self, meeting_subject, meeting_date, duration):
        if not duration:
            duration = _('unknown')
        else:
            duration = str(duration)
        meet_date = fields.Datetime.from_string(meeting_date)
        meeting_usertime = fields.Datetime.to_string(fields.Datetime.context_timestamp(self, meet_date))
        html_time = "<time datetime='%s+00:00'>%s</time>" % (meeting_date, meeting_usertime)
        message = _("Meeting scheduled at '%s'<br> Subject: %s <br> Duration: %s hours") % (html_time, meeting_subject, duration)
        return self.message_post(body=message)

    # ------------------------------------------------------------
    # MERGE LEADS / OPPS
    # ------------------------------------------------------------

    def _merge_get_result_type(self):
        """ Define the type of the result of the merge.  If at least one of the
        element to merge is an opp, the resulting new element will be an opp.
        Otherwise it will be a lead. """
        if any(record.type == 'opportunity' for record in self):
            return 'opportunity'
        return 'lead'

    def _merge_data(self, fields):
        """ Prepare lead/opp data into a dictionary for merging. Different types
            of fields are processed in different ways:
                - text: all the values are concatenated
                - m2m and o2m: those fields aren't processed
                - m2o: the first not null value prevails (the other are dropped)
                - any other type of field: same as m2o

            :param fields: list of fields to process
            :return dict data: contains the merged values of the new opportunity
        """
        # helpers
        def _get_first_not_null(attr, opportunities):
            for opp in opportunities:
                val = opp[attr]
                if val:
                    return val
            return False

        def _get_first_not_null_id(attr, opportunities):
            res = _get_first_not_null(attr, opportunities)
            return res.id if res else False

        # process the fields' values
        data = {}
        for field_name in fields:
            field = self._fields.get(field_name)
            if field is None:
                continue
            if field.type in ('many2many', 'one2many'):
                continue
            elif field.type == 'many2one':
                data[field_name] = _get_first_not_null_id(field_name, self)  # take the first not null
            elif field.type == 'text':
                data[field_name] = '\n\n'.join(it for it in self.mapped(field_name) if it)
            else:
                data[field_name] = _get_first_not_null(field_name, self)

        # define the resulting type ('lead' or 'opportunity')
        data['type'] = self._merge_get_result_type()
        return data

    def _merge_notify_get_merged_fields_message(self, fields):
        """ Generate the message body with the changed values

        :param fields : list of fields to track
        :returns a list of message bodies for the corresponding leads
        """
        bodies = []
        for lead in self:
            title = "%s : %s\n" % (_('Merged opportunity') if lead.type == 'opportunity' else _('Merged lead'), lead.name)
            body = [title]
            _fields = self.env['ir.model.fields'].search([
                ('name', 'in', fields or []),
                ('model_id.model', '=', lead._name),
            ])
            for field in _fields:
                value = getattr(lead, field.name, False)
                if field.ttype == 'selection':
                    selections = lead.fields_get()[field.name]['selection']
                    value = next((v[1] for v in selections if v[0] == value), value)
                elif field.ttype == 'many2one':
                    if value:
                        value = value.sudo().display_name
                elif field.ttype == 'many2many':
                    if value:
                        value = ','.join(
                            val.display_name
                            for val in value.sudo()
                        )
                body.append("%s: %s" % (field.field_description, value or ''))
            bodies.append("<br/>".join(body + ['<br/>']))
        return bodies

    def _merge_notify(self, opportunities):
        """ Post a message gathering merged leads/opps informations. It explains
        which fields has been merged and their new value. `self` is the resulting
        merge crm.lead record.

        :param opportunities: see ``merge_dependences``
        """
        # TODO JEM: mail template should be used instead of fix body, subject text
        self.ensure_one()
        # mail message's subject
        result_type = opportunities._merge_get_result_type()
        merge_message = _('Merged leads') if result_type == 'lead' else _('Merged opportunities')
        subject = merge_message + ": " + ", ".join(opportunities.mapped('name'))
        # message bodies
        message_bodies = opportunities._merge_notify_get_merged_fields_message(list(CRM_LEAD_FIELDS_TO_MERGE))
        message_body = "\n\n".join(message_bodies)
        return self.message_post(body=message_body, subject=subject)

    def _merge_opportunity_history(self, opportunities):
        """ Move mail.message from the given opportunities to the current one. `self` is the
            crm.lead record destination for message of `opportunities`.

        :param opportunities: see ``merge_dependences``
        """
        self.ensure_one()
        for opportunity in opportunities:
            for message in opportunity.message_ids:
                message.write({
                    'res_id': self.id,
                    'subject': _(
                        "From %(source_name)s : %(source_subject)s",
                        source_name=opportunity.name,
                        source_subject=message.subject
                    )
                })
        return True

    def _merge_opportunity_attachments(self, opportunities):
        """ Move attachments of given opportunities to the current one `self`, and rename
            the attachments having same name than native ones.

        :param opportunities: see ``merge_dependences``
        """
        self.ensure_one()

        # return attachments of opportunity
        def _get_attachments(opportunity_id):
            return self.env['ir.attachment'].search([('res_model', '=', self._name), ('res_id', '=', opportunity_id)])

        first_attachments = _get_attachments(self.id)
        # counter of all attachments to move. Used to make sure the name is different for all attachments
        count = 1
        for opportunity in opportunities:
            attachments = _get_attachments(opportunity.id)
            for attachment in attachments:
                values = {'res_id': self.id}
                for attachment_in_first in first_attachments:
                    if attachment.name == attachment_in_first.name:
                        values['name'] = "%s (%s)" % (attachment.name, count)
                count += 1
                attachment.write(values)
        return True

    def merge_dependences(self, opportunities):
        """ Merge dependences (messages, attachments, ...). These dependences will be
            transfered to `self`, the most important lead.

        :param opportunities : recordset of opportunities to transfer. Does not
          include `self` which is the target crm.lead being the result of the merge.
        """
        self.ensure_one()
        self._merge_notify(opportunities)
        self._merge_opportunity_history(opportunities)
        self._merge_opportunity_attachments(opportunities)

    def merge_opportunity(self, user_id=False, team_id=False, auto_unlink=True):
        """ Merge opportunities in one. Different cases of merge:
                - merge leads together = 1 new lead
                - merge at least 1 opp with anything else (lead or opp) = 1 new opp
            The resulting lead/opportunity will be the most important one (based on its confidence level)
            updated with values from other opportunities to merge.
            :param user_id : the id of the saleperson. If not given, will be determined by `_merge_data`.
            :param team : the id of the Sales Team. If not given, will be determined by `_merge_data`.
            :return crm.lead record resulting of th merge
        """
        if len(self.ids) <= 1:
            raise UserError(_('Please select more than one element (lead or opportunity) from the list view.'))

        if len(self.ids) > 5 and not self.env.is_superuser():
            raise UserError(_("To prevent data loss, Leads and Opportunities can only be merged by groups of 5."))

        opportunities = self._sort_by_confidence_level(reverse=True)

        # get SORTED recordset of head and tail, and complete list
        opportunities_head = opportunities[0]
        opportunities_tail = opportunities[1:]

        # merge all the sorted opportunity. This means the value of
        # the first (head opp) will be a priority.
        merged_data = opportunities._merge_data(list(CRM_LEAD_FIELDS_TO_MERGE))

        # force value for saleperson and Sales Team
        if user_id:
            merged_data['user_id'] = user_id
        if team_id:
            merged_data['team_id'] = team_id

        # merge other data (mail.message, attachments, ...) from tail into head
        opportunities_head.merge_dependences(opportunities_tail)

        # check if the stage is in the stages of the Sales Team. If not, assign the stage with the lowest sequence
        if merged_data.get('team_id'):
            team_stage_ids = self.env['crm.stage'].search(['|', ('team_id', '=', merged_data['team_id']), ('team_id', '=', False)], order='sequence')
            if merged_data.get('stage_id') not in team_stage_ids.ids:
                merged_data['stage_id'] = team_stage_ids[0].id if team_stage_ids else False

        # write merged data into first opportunity
        opportunities_head.write(merged_data)

        # delete tail opportunities
        # we use the SUPERUSER to avoid access rights issues because as the user had the rights to see the records it should be safe to do so
        if auto_unlink:
            opportunities_tail.sudo().unlink()

        return opportunities_head

    def _sort_by_confidence_level(self, reverse=False):
        """ Sorting the leads/opps according to the confidence level of its stage, which relates to the probability of winning it
        The confidence level increases with the stage sequence
        An Opportunity always has higher confidence level than a lead
        """
        def opps_key(opportunity):
            return opportunity.type == 'opportunity', opportunity.stage_id.sequence, -opportunity._origin.id

        return self.sorted(key=opps_key, reverse=reverse)

    def _convert_opportunity_data(self, customer, team_id=False):
        """ Extract the data from a lead to create the opportunity
            :param customer : res.partner record
            :param team_id : identifier of the Sales Team to determine the stage
        """
        new_team_id = team_id if team_id else self.team_id.id
        upd_values = {
            'type': 'opportunity',
            'date_open': fields.Datetime.now(),
            'date_conversion': fields.Datetime.now(),
        }
        if customer != self.partner_id:
            upd_values['partner_id'] = customer.id if customer else False
        if not self.stage_id:
            stage = self._stage_find(team_id=new_team_id)
            upd_values['stage_id'] = stage.id
        return upd_values

    def convert_opportunity(self, partner_id, user_ids=False, team_id=False):
        customer = False
        if partner_id:
            customer = self.env['res.partner'].browse(partner_id)
        for lead in self:
            if not lead.active or lead.probability == 100:
                continue
            vals = lead._convert_opportunity_data(customer, team_id)
            lead.write(vals)

        if user_ids or team_id:
            self.handle_salesmen_assignment(user_ids, team_id)

        return True

    def _get_lead_duplicates(self, partner=None, email=None, include_lost=False):
        """ Search for leads that seem duplicated based on partner / email.

        :param partner : optional customer when searching duplicated
        :param email: email (possibly formatted) to search
        :param boolean include_lost: if True, search includes archived opportunities
          (still only active leads are considered). If False, search for active
          and not won leads and opportunities;
        """
        if not email and not partner:
            return self.env['crm.lead']

        domain = []
        for normalized_email in [tools.email_normalize(email) for email in tools.email_split(email)]:
            domain.append(('email_normalized', '=', normalized_email))
        if partner:
            domain.append(('partner_id', '=', partner.id))

        if not domain:
            return self.env['crm.lead']

        domain = ['|'] * (len(domain) - 1) + domain
        if include_lost:
            domain += ['|', ('type', '=', 'opportunity'), ('active', '=', True)]
        else:
            domain += ['&', ('active', '=', True), '|', ('probability', '=', False), ('probability', '<', 100)]

        return self.with_context(active_test=False).search(domain)

    def _create_customer(self):
        """ Create a partner from lead data and link it to the lead.

        :return: newly-created partner browse record
        """
        Partner = self.env['res.partner']
        contact_name = self.contact_name
        if not contact_name:
            contact_name = Partner._parse_partner_name(self.email_from)[0] if self.email_from else False

        if self.partner_name:
            partner_company = Partner.create(self._prepare_customer_values(self.partner_name, is_company=True))
        elif self.partner_id:
            partner_company = self.partner_id
        else:
            partner_company = None

        if contact_name:
            return Partner.create(self._prepare_customer_values(contact_name, is_company=False, parent_id=partner_company.id if partner_company else False))

        if partner_company:
            return partner_company
        return Partner.create(self._prepare_customer_values(self.name, is_company=False))

    def _prepare_customer_values(self, partner_name, is_company=False, parent_id=False):
        """ Extract data from lead to create a partner.

        :param name : furtur name of the partner
        :param is_company : True if the partner is a company
        :param parent_id : id of the parent partner (False if no parent)

        :return: dictionary of values to give at res_partner.create()
        """
        email_split = tools.email_split(self.email_from)
        res = {
            'name': partner_name,
            'user_id': self.env.context.get('default_user_id') or self.user_id.id,
            'comment': self.description,
            'team_id': self.team_id.id,
            'parent_id': parent_id,
            'phone': self.phone,
            'mobile': self.mobile,
            'email': email_split[0] if email_split else False,
            'title': self.title.id,
            'function': self.function,
            'street': self.street,
            'street2': self.street2,
            'zip': self.zip,
            'city': self.city,
            'country_id': self.country_id.id,
            'state_id': self.state_id.id,
            'website': self.website,
            'is_company': is_company,
            'type': 'contact'
        }
        if self.lang_id:
            res['lang'] = self.lang_id.code
        return res

    def _find_matching_partner(self, email_only=False):
        """ Try to find a matching partner with available information on the
        lead, using notably customer's name, email, ...

        :param email_only: Only find a matching based on the email. To use
            for automatic process where ilike based on name can be too dangerous
        :return: partner browse record
        """
        self.ensure_one()
        partner = self.partner_id

        if not partner and self.email_from:
            partner = self.env['res.partner'].search([('email', '=', self.email_from)], limit=1)

        if not partner and not email_only:
            # search through the existing partners based on the lead's partner or contact name
            # to be aligned with _create_customer, search on lead's name as last possibility
            for customer_potential_name in [self[field_name] for field_name in ['partner_name', 'contact_name', 'name'] if self[field_name]]:
                partner = self.env['res.partner'].search([('name', 'ilike', '%' + customer_potential_name + '%')], limit=1)
                if partner:
                    break

        return partner

    def handle_partner_assignment(self, force_partner_id=False, create_missing=True):
        """ Update customer (partner_id) of leads. Purpose is to set the same
        partner on most leads; either through a newly created partner either
        through a given partner_id.

        :param int force_partner_id: if set, update all leads to that customer;
        :param create_missing: for leads without customer, create a new one
          based on lead information;
        """
        for lead in self:
            if force_partner_id:
                lead.partner_id = force_partner_id
            if not lead.partner_id and create_missing:
                partner = lead._create_customer()
                lead.partner_id = partner.id

    def handle_salesmen_assignment(self, user_ids=None, team_id=False):
        """ Assign salesmen and salesteam to a batch of leads.  If there are more
        leads than salesmen, these salesmen will be assigned in round-robin. E.g.
        4 salesmen (S1, S2, S3, S4) for 6 leads (L1, L2, ... L6) will assigned as
        following: L1 - S1, L2 - S2, L3 - S3, L4 - S4, L5 - S1, L6 - S2.

        :param list user_ids: salesmen to assign
        :param int team_id: salesteam to assign
        """
        update_vals = {'team_id': team_id} if team_id else {}
        if not user_ids:
            self.write(update_vals)
        else:
            lead_ids = self.ids
            steps = len(user_ids)
            # pass 1 : lead_ids[0:6:3] = [L1,L4]
            # pass 2 : lead_ids[1:6:3] = [L2,L5]
            # pass 3 : lead_ids[2:6:3] = [L3,L6]
            # ...
            for idx in range(0, steps):
                subset_ids = lead_ids[idx:len(lead_ids):steps]
                update_vals['user_id'] = user_ids[idx]
                self.env['crm.lead'].browse(subset_ids).write(update_vals)

    # ------------------------------------------------------------
    # TOOLS
    # ------------------------------------------------------------

    def redirect_lead_opportunity_view(self):
        self.ensure_one()
        return {
            'name': _('Lead or Opportunity'),
            'view_mode': 'form',
            'res_model': 'crm.lead',
            'domain': [('type', '=', self.type)],
            'res_id': self.id,
            'view_id': False,
            'type': 'ir.actions.act_window',
            'context': {'default_type': self.type}
        }

    @api.model
    def get_empty_list_help(self, help):
        help_title, sub_title = "", ""
        if self._context.get('default_type') == 'lead':
            help_title = _('Create a new lead')
        else:
            help_title = _('Create an opportunity to start playing with your pipeline.')
        alias_record = self.env['mail.alias'].search([
            ('alias_name', '!=', False),
            ('alias_name', '!=', ''),
            ('alias_model_id.model', '=', 'crm.lead'),
            ('alias_parent_model_id.model', '=', 'crm.team'),
            ('alias_force_thread_id', '=', False)
        ], limit=1)
        if alias_record and alias_record.alias_domain and alias_record.alias_name:
            email = '%s@%s' % (alias_record.alias_name, alias_record.alias_domain)
            email_link = "<b><a href='mailto:%s'>%s</a></b>" % (email, email)
            sub_title = _('Use the top left <i>Create</i> button, or send an email to %s to test the email gateway.') % (email_link)
        return '<p class="o_view_nocontent_smiling_face">%s</p><p class="oe_view_nocontent_alias">%s</p>' % (help_title, sub_title)

    # ------------------------------------------------------------
    # MAILING
    # ------------------------------------------------------------

    def _creation_subtype(self):
        return self.env.ref('crm.mt_lead_create')

    def _track_subtype(self, init_values):
        self.ensure_one()
        if 'stage_id' in init_values and self.probability == 100 and self.stage_id:
            return self.env.ref('crm.mt_lead_won')
        elif 'lost_reason' in init_values and self.lost_reason:
            return self.env.ref('crm.mt_lead_lost')
        elif 'stage_id' in init_values:
            return self.env.ref('crm.mt_lead_stage')
        elif 'active' in init_values and self.active:
            return self.env.ref('crm.mt_lead_restored')
        elif 'active' in init_values and not self.active:
            return self.env.ref('crm.mt_lead_lost')
        return super(Lead, self)._track_subtype(init_values)

    def _notify_get_groups(self):
        """ Handle salesman recipients that can convert leads into opportunities
        and set opportunities as won / lost. """
        groups = super(Lead, self)._notify_get_groups()

        self.ensure_one()
        if self.type == 'lead':
            convert_action = self._notify_get_action_link('controller', controller='/lead/convert')
            salesman_actions = [{'url': convert_action, 'title': _('Convert to opportunity')}]
        else:
            won_action = self._notify_get_action_link('controller', controller='/lead/case_mark_won')
            lost_action = self._notify_get_action_link('controller', controller='/lead/case_mark_lost')
            salesman_actions = [
                {'url': won_action, 'title': _('Won')},
                {'url': lost_action, 'title': _('Lost')}]

        if self.team_id:
            salesman_actions.append({'url': self._notify_get_action_link('view', res_id=self.team_id.id, model=self.team_id._name), 'title': _('Sales Team Settings')})

        salesman_group_id = self.env.ref('sales_team.group_sale_salesman').id
        new_group = (
            'group_sale_salesman', lambda pdata: pdata['type'] == 'user' and salesman_group_id in pdata['groups'], {
                'actions': salesman_actions,
            })

        return [new_group] + groups

    def _notify_get_reply_to(self, default=None, records=None, company=None, doc_names=None):
        """ Override to set alias of lead and opportunities to their sales team if any. """
        aliases = self.mapped('team_id').sudo()._notify_get_reply_to(default=default, records=None, company=company, doc_names=None)
        res = {lead.id: aliases.get(lead.team_id.id) for lead in self}
        leftover = self.filtered(lambda rec: not rec.team_id)
        if leftover:
            res.update(super(Lead, leftover)._notify_get_reply_to(default=default, records=None, company=company, doc_names=doc_names))
        return res

    def _message_get_default_recipients(self):
        return {r.id: {
            'partner_ids': [],
            'email_to': r.email_normalized,
            'email_cc': False}
            for r in self}

    def _message_get_suggested_recipients(self):
        recipients = super(Lead, self)._message_get_suggested_recipients()
        try:
            for lead in self:
                if lead.partner_id:
                    lead._message_add_suggested_recipient(recipients, partner=lead.partner_id, reason=_('Customer'))
                elif lead.email_from:
                    lead._message_add_suggested_recipient(recipients, email=lead.email_from, reason=_('Customer Email'))
        except AccessError:  # no read access rights -> just ignore suggested recipients because this imply modifying followers
            pass
        return recipients

    @api.model
    def message_new(self, msg_dict, custom_values=None):
        """ Overrides mail_thread message_new that is called by the mailgateway
            through message_process.
            This override updates the document according to the email.
        """

        # remove external users
        if self.env.user.has_group('base.group_portal'):
            self = self.with_context(default_user_id=False)

        # remove default author when going through the mail gateway. Indeed we
        # do not want to explicitly set user_id to False; however we do not
        # want the gateway user to be responsible if no other responsible is
        # found.
        if self._uid == self.env.ref('base.user_root').id:
            self = self.with_context(default_user_id=False)

        if custom_values is None:
            custom_values = {}
        defaults = {
            'name':  msg_dict.get('subject') or _("No Subject"),
            'email_from': msg_dict.get('from'),
            'partner_id': msg_dict.get('author_id', False),
        }
        if msg_dict.get('priority') in dict(crm_stage.AVAILABLE_PRIORITIES):
            defaults['priority'] = msg_dict.get('priority')
        defaults.update(custom_values)

        # assign right company
        if 'company_id' not in defaults and 'team_id' in defaults:
            defaults['company_id'] = self.env['crm.team'].browse(defaults['team_id']).company_id.id
        return super(Lead, self).message_new(msg_dict, custom_values=defaults)

    def _message_post_after_hook(self, message, msg_vals):
        if self.email_from and not self.partner_id:
            # we consider that posting a message with a specified recipient (not a follower, a specific one)
            # on a document without customer means that it was created through the chatter using
            # suggested recipients. This heuristic allows to avoid ugly hacks in JS.
            new_partner = message.partner_ids.filtered(lambda partner: partner.email == self.email_from)
            if new_partner:
                self.search([
                    ('partner_id', '=', False),
                    ('email_from', '=', new_partner.email),
                    ('stage_id.fold', '=', False)]).write({'partner_id': new_partner.id})
        return super(Lead, self)._message_post_after_hook(message, msg_vals)

    def _message_partner_info_from_emails(self, emails, link_mail=False):
        result = super(Lead, self)._message_partner_info_from_emails(emails, link_mail=link_mail)
        for partner_info in result:
            if not partner_info.get('partner_id') and (self.partner_name or self.contact_name):
                emails = email_re.findall(partner_info['full_name'] or '')
                email = emails and emails[0] or ''
                if email and self.email_from and email.lower() == self.email_from.lower():
                    partner_info['full_name'] = tools.formataddr((self.contact_name or self.partner_name, email))
                    break
        return result

    @api.model
    def get_import_templates(self):
        return [{
            'label': _('Import Template for Leads & Opportunities'),
            'template': '/crm/static/xls/crm_lead.xls'
        }]

    # ------------------------------------------------------------
    # PLS
    # ------------------------------------------------------------
    # Predictive lead scoring is computing the lead probability, based on won and lost leads from the past
    # Each won/lost lead increments a frequency table, where we store, for each field/value couple, the number of
    # won and lost leads.
    #   E.g. : A won lead from Belgium will increase the won count of the frequency country_id='Belgium' by 1.
    # The frequencies are split by team_id, so each team has his own frequencies environment. (Team A doesn't impact B)
    # There are two main ways to build the frequency table:
    #   - Live Increment: At each Won/lost, we increment directly the frequencies based on the lead values.
    #       Done right BEFORE writing the lead as won or lost.
    #       We consider a lead that will be marked as won or lost.
    #       Used each time a lead is won or lost, to ensure frequency table is always up to date
    #   - One shot Rebuild: empty the frequency table and rebuild it from scratch, based on every already won/lost leads
    #       Done during cron process.
    #       We consider all the leads that have been already won or lost.
    #       Used in one shot, when modifying the criteria to take into account (fields or reference date)

    # ---------------------------------
    # PLS: Probability Computation
    # ---------------------------------
    def _pls_get_naive_bayes_probabilities(self, batch_mode=False):
        """
        In machine learning, naive Bayes classifiers (NBC) are a family of simple "probabilistic classifiers" based on
        applying Bayes theorem with strong (naive) independence assumptions between the variables taken into account.
        E.g: will TDE eat m&m's depending on his sleep status, the amount of work he has and the fullness of his stomach?
        As we use experience to compute the statistics, every day, we will register the variables state + the result.
        As the days pass, we will be able to determine, with more and more precision, if TDE will eat m&m's
        for a specific combination :
            - did sleep very well, a lot of work and stomach full > Will never happen !
            - didn't sleep at all, no work at all and empty stomach > for sure !
        Following Bayes' Theorem: the probability that an event occurs (to win) under certain conditions is proportional
        to the probability to win under each condition separately and the probability to win. We compute a 'Win score'
        -> P(Won | A∩B) ∝ P(A∩B | Won)*P(Won) OR S(Won | A∩B) = P(A∩B | Won)*P(Won)
        To compute a percentage of probability to win, we also compute the 'Lost score' that is proportional to the
        probability to lose under each condition separately and the probability to lose.
        -> Probability =  S(Won | A∩B) / ( S(Won | A∩B) + S(Lost | A∩B) )
        See https://www.youtube.com/watch?v=CPqOCI0ahss can help to get a quick and simple example.
        One issue about NBC is when a event occurence is never observed.
        E.g: if when TDE has an empty stomach, he always eat m&m's, than the "not eating m&m's when empty stomach' event
        will never be observed.
        This is called 'zero frequency' and that leads to division (or at least multiplication) by zero.
        To avoid this, we add 0.1 in each frequency. With few data, the computation is than not really realistic.
        The more we have records to analyse, the more the estimation will be precise.
        :return: probability in percent (and integer rounded) that the lead will be won at the current stage.
        """
        lead_probabilities = {}
        if not self:
            return lead_probabilities

        # Get all leads values, no matter the team_id
        domain = []
        if batch_mode:
            domain = [
                '&',
                    ('active', '=', True), ('id', 'in', self.ids),
                    '|',
                        ('probability', '=', None),
                        '&',
                            ('probability', '<', 100), ('probability', '>', 0)
            ]
        leads_values_dict = self._pls_get_lead_pls_values(domain=domain)

        if not leads_values_dict:
            return lead_probabilities

        # Get unique couples to search in frequency table and won leads.
        leads_fields = set()  # keep unique fields, as a lead can have multiple tag_ids
        won_leads = set()
        won_stage_ids = self.env['crm.stage'].search([('is_won', '=', True)]).ids
        for lead_id, values in leads_values_dict.items():
            for field, value in values['values']:
                if field == 'stage_id' and value in won_stage_ids:
                    won_leads.add(lead_id)
                leads_fields.add(field)

        # get all variable related records from frequency table, no matter the team_id
        frequencies = self.env['crm.lead.scoring.frequency'].search([('variable', 'in', list(leads_fields))], order="team_id asc")

        # get all team_ids from frequencies
        frequency_teams = frequencies.mapped('team_id')
        frequency_team_ids = [0] + [team.id for team in frequency_teams]

        # 1. Compute each variable value count individually
        # regroup each variable to be able to compute their own probabilities
        # As all the variable does not enter into account (as we reject unset values in the process)
        # each value probability must be computed only with their own variable related total count
        # special case: for lead for which team_id is not in frequency table,
        # we consider all the records, independently from team_id (this is why we add a result[-1])
        result = dict((team_id, dict((field, dict(won_total=0, lost_total=0)) for field in leads_fields)) for team_id in frequency_team_ids)
        result[-1] = dict((field, dict(won_total=0, lost_total=0)) for field in leads_fields)
        for frequency in frequencies:
            team_result = result[frequency.team_id.id if frequency.team_id else 0]

            field = frequency['variable']
            value = frequency['value']

            # To avoid that a tag take to much importance if his subset is too small,
            # we ignore the tag frequencies if we have less than 50 won or lost for this tag.
            if field == 'tag_id' and (frequency['won_count'] + frequency['lost_count']) < 50:
                continue

            team_result[field][value] = {'won': frequency['won_count'], 'lost': frequency['lost_count']}
            team_result[field]['won_total'] += frequency['won_count']
            team_result[field]['lost_total'] += frequency['lost_count']

            if value not in result[-1][field]:
                result[-1][field][value] = {'won': 0, 'lost': 0}
            result[-1][field][value]['won'] += frequency['won_count']
            result[-1][field][value]['lost'] += frequency['lost_count']
            result[-1][field]['won_total'] += frequency['won_count']
            result[-1][field]['lost_total'] += frequency['lost_count']

        # Get all won, lost and total count for all records in frequencies per team_id
        for team_id in result:
            result[team_id]['team_won'], \
            result[team_id]['team_lost'], \
            result[team_id]['team_total'] = self._pls_get_won_lost_total_count(result[team_id])

        save_team_id = None
        p_won, p_lost = 1, 1
        for lead_id, lead_values in leads_values_dict.items():
            # if stage_id is null, return 0 and bypass computation
            lead_fields = [value[0] for value in lead_values.get('values', [])]
            if not 'stage_id' in lead_fields:
                lead_probabilities[lead_id] = 0
                continue
            # if lead stage is won, return 100
            elif lead_id in won_leads:
                lead_probabilities[lead_id] = 100
                continue

            lead_team_id = lead_values['team_id'] if lead_values['team_id'] else 0  # team_id = None -> Convert to 0
            lead_team_id = lead_team_id if lead_team_id in result else -1  # team_id not in frequency Table -> convert to -1
            if lead_team_id != save_team_id:
                save_team_id = lead_team_id
                team_won = result[save_team_id]['team_won']
                team_lost = result[save_team_id]['team_lost']
                team_total = result[save_team_id]['team_total']
                # if one count = 0, we cannot compute lead probability
                if not team_won or not team_lost:
                    continue
                p_won = team_won / team_total
                p_lost = team_lost / team_total

            # 2. Compute won and lost score using each variable's individual probability
            s_lead_won, s_lead_lost = p_won, p_lost
            for field, value in lead_values['values']:
                field_result = result.get(save_team_id, {}).get(field)
                value = value.origin if hasattr(value, 'origin') else value
                value_result = field_result.get(str(value)) if field_result else False
                if value_result:
                    total_won = team_won if field == 'stage_id' else field_result['won_total']
                    total_lost = team_lost if field == 'stage_id' else field_result['lost_total']

                    s_lead_won *= value_result['won'] / total_won
                    s_lead_lost *= value_result['lost'] / total_lost

            # 3. Compute Probability to win
            lead_probabilities[lead_id] = round(100 * s_lead_won / (s_lead_won + s_lead_lost), 2)
        return lead_probabilities

    # ---------------------------------
    # PLS: Live Increment
    # ---------------------------------
    def _pls_increment_frequencies(self, from_state=None, to_state=None):
        """
        When losing or winning a lead, this method is called to increment each PLS parameter related to the lead
        in won_count (if won) or in lost_count (if lost).

        This method is also used when reactivating a mistakenly lost lead (using the decrement argument).
        In this case, the lost count should be de-increment by 1 for each PLS parameter linked ot the lead.

        Live increment must be done before writing the new values because we need to know the state change (from and to).
        This would not be an issue for the reach won or reach lost as we just need to increment the frequencies with the
        final state of the lead.
        This issue is when the lead leaves a closed state because once the new values have been writen, we do not know
        what was the previous state that we need to decrement.
        This is why 'is_won' and 'decrement' parameters are used to describe the from / to change of his state.
        """
        new_frequencies_by_team, existing_frequencies_by_team = self._pls_prepare_update_frequency_table(target_state=from_state or to_state)

        # update frequency table
        self._pls_update_frequency_table(new_frequencies_by_team, 1 if to_state else -1,
                                         existing_frequencies_by_team=existing_frequencies_by_team)

    # ---------------------------------
    # PLS: One shot rebuild
    # ---------------------------------
    def _cron_update_automated_probabilities(self):
        """ This cron will :
          - rebuild the lead scoring frequency table
          - recompute all the automated_probability and align probability if both were aligned
        """
        cron_start_date = datetime.now()
        self._rebuild_pls_frequency_table()
        self._update_automated_probabilities()
        _logger.info("Predictive Lead Scoring : Cron duration = %d seconds" % ((datetime.now() - cron_start_date).total_seconds()))

    def _rebuild_pls_frequency_table(self):
        # Clear the frequencies table (in sql to speed up the cron)
        try:
            self.check_access_rights('unlink')
        except AccessError:
            raise UserError(_("You don't have the access needed to run this cron."))
        else:
            self._cr.execute('TRUNCATE TABLE crm_lead_scoring_frequency')

        new_frequencies_by_team, unused = self._pls_prepare_update_frequency_table(rebuild=True)
        # update frequency table
        self._pls_update_frequency_table(new_frequencies_by_team, 1)

        _logger.info("Predictive Lead Scoring : crm.lead.scoring.frequency table rebuilt")

    def _update_automated_probabilities(self):
        """ Recompute all the automated_probability (and align probability if both were aligned) for all the leads
        that are active (not won, nor lost).

        For performance matter, as there can be a huge amount of leads to recompute, this cron proceed by batch.
        Each batch is performed into its own transaction, in order to minimise the lock time on the lead table
        (and to avoid complete lock if there was only 1 transaction that would last for too long -> several minutes).
        If a concurrent update occurs, it will simply be put in the queue to get the lock.
        """
        pls_start_date = self._pls_get_safe_start_date()
        if not pls_start_date:
            return

        # 1. Get all the leads to recompute created after pls_start_date that are nor won nor lost
        # (Won : probability = 100 | Lost : probability = 0 or inactive. Here, inactive won't be returned anyway)
        # Get also all the lead without probability --> These are the new leads. Activate auto probability on them.
        pending_lead_domain = [
            '&',
                '&',
                    ('stage_id', '!=', False), ('create_date', '>=', pls_start_date),
                '|',
                    ('probability', '=', False),
                    '&',
                        ('probability', '<', 100), ('probability', '>', 0)
        ]
        leads_to_update = self.env['crm.lead'].search(pending_lead_domain)
        leads_to_update_count = len(leads_to_update)

        # 2. Compute by batch to avoid memory error
        lead_probabilities = {}
        for i in range(0, leads_to_update_count, PLS_COMPUTE_BATCH_STEP):
            leads_to_update_part = leads_to_update[i:i + PLS_COMPUTE_BATCH_STEP]
            lead_probabilities.update(leads_to_update_part._pls_get_naive_bayes_probabilities(batch_mode=True))
        _logger.info("Predictive Lead Scoring : New automated probabilities computed")

        # 3. Group by new probability to reduce server roundtrips when executing the update
        probability_leads = defaultdict(list)
        for lead_id, probability in sorted(lead_probabilities.items()):
            probability_leads[probability].append(lead_id)

        # 4. Update automated_probability (+ probability if both were equal)
        update_sql = """UPDATE crm_lead
                        SET automated_probability = %s,
                            probability = CASE WHEN (probability = automated_probability OR probability is null)
                                               THEN (%s)
                                               ELSE (probability)
                                          END
                        WHERE id in %s"""

        # Update by a maximum number of leads at the same time, one batch by transaction :
        # - avoid memory errors
        # - avoid blocking the table for too long with a too big transaction
        transactions_count, transactions_failed_count = 0, 0
        cron_update_lead_start_date = datetime.now()
        auto_commit = not getattr(threading.currentThread(), 'testing', False)
        for probability, probability_lead_ids in probability_leads.items():
            for lead_ids_current in tools.split_every(PLS_UPDATE_BATCH_STEP, probability_lead_ids):
                transactions_count += 1
                try:
                    self.env.cr.execute(update_sql, (probability, probability, tuple(lead_ids_current)))
                    # auto-commit except in testing mode
                    if auto_commit:
                        self.env.cr.commit()
                except Exception as e:
                    _logger.warning("Predictive Lead Scoring : update transaction failed. Error: %s" % e)
                    transactions_failed_count += 1

        _logger.info(
            "Predictive Lead Scoring : All automated probabilities updated (%d leads / %d transactions (%d failed) / %d seconds)" % (
                leads_to_update_count,
                transactions_count,
                transactions_failed_count,
                (datetime.now() - cron_update_lead_start_date).total_seconds(),
            )
        )

    # ---------------------------------
    # PLS: Common parts for both mode
    # ---------------------------------
    def _pls_prepare_update_frequency_table(self, rebuild=False, target_state=False):
        """
        This method is common to Live Increment or Full Rebuild mode, as it shares the main steps.
        This method will prepare the frequency dict needed to update the frequency table:
            - New frequencies: frequencies that we need to add in the frequency table.
            - Existing frequencies: frequencies that are already in the frequency table.
        In rebuild mode, only the new frequencies are needed as existing frequencies are truncated.
        For each team, each dict contains the frequency in won and lost for each field/value couple
        of the target leads.
        Target leads are :
            - in Live increment mode : given ongoing leads (self)
            - in Full rebuild mode : all the closed (won and lost) leads in the DB.
        During the frequencies update, with both new and existing frequencies, we can split frequencies to update
        and frequencies to add. If a field/value couple already exists in the frequency table, we just update it.
        Otherwise, we need to insert a new one.
        """
        # Keep eligible leads
        pls_start_date = self._pls_get_safe_start_date()
        if not pls_start_date:
            return {}, {}

        if rebuild:  # rebuild will treat every closed lead in DB, increment will treat current ongoing leads
            pls_leads = self
        else:
            # Only treat leads created after the PLS start Date
            pls_leads = self.filtered(
                lambda lead: fields.Date.to_date(pls_start_date) <= fields.Date.to_date(lead.create_date))
            if not pls_leads:
                return {}, {}

        # Extract target leads values
        if rebuild:  # rebuild is ok
            domain = [
                '&',
                    ('create_date', '>=', pls_start_date),
                    '|',
                        ('probability', '=', 100),
                        '&',
                            ('probability', '=', 0), ('active', '=', False)
              ]
            team_ids = self.env['crm.team'].with_context(active_test=False).search([]).ids + [0]  # If team_id is unset, consider it as team 0
        else:  # increment
            domain = [('id', 'in', pls_leads.ids)]
            team_ids = pls_leads.mapped('team_id').ids + [0]

        leads_values_dict = pls_leads._pls_get_lead_pls_values(domain=domain)

        # split leads values by team_id
        # get current frequencies related to the target leads
        leads_frequency_values_by_team = dict((team_id, []) for team_id in team_ids)
        leads_pls_fields = set()  # ensure to keep each field unique (can have multiple tag_id leads_values_dict)
        for lead_id, values in leads_values_dict.items():
            team_id = values.get('team_id', 0)  # If team_id is unset, consider it as team 0
            lead_frequency_values = {'count': 1}
            for field, value in values['values']:
                if field != "probability":  # was added to lead values in batch mode to know won/lost state, but is not a pls fields.
                    leads_pls_fields.add(field)
                else:  # extract lead probability - needed to increment tag_id frequency. (proba always before tag_id)
                    lead_probability = value
                if field == 'tag_id':  # handle tag_id separatelly (as in One Shot rebuild mode)
                    leads_frequency_values_by_team[team_id].append({field: value, 'count': 1, 'probability': lead_probability})
                else:
                    lead_frequency_values[field] = value
            leads_frequency_values_by_team[team_id].append(lead_frequency_values)
        leads_pls_fields = list(leads_pls_fields)

        # get new frequencies
        new_frequencies_by_team = {}
        for team_id in team_ids:
            # prepare fields and tag values for leads by team
            new_frequencies_by_team[team_id] = self._pls_prepare_frequencies(
                leads_frequency_values_by_team[team_id], leads_pls_fields, target_state=target_state)

        # get existing frequencies
        existing_frequencies_by_team = {}
        if not rebuild:  # there is no existing frequency in rebuild mode as they were all deleted.
            # read all fields to get everything in memory in one query (instead of having query + prefetch)
            existing_frequencies = self.env['crm.lead.scoring.frequency'].search_read(
                ['&', ('variable', 'in', leads_pls_fields),
                      '|', ('team_id', 'in', pls_leads.mapped('team_id').ids), ('team_id', '=', False)])
            for frequency in existing_frequencies:
                team_id = frequency['team_id'][0] if frequency.get('team_id') else 0
                if team_id not in existing_frequencies_by_team:
                    existing_frequencies_by_team[team_id] = dict((field, {}) for field in leads_pls_fields)

                existing_frequencies_by_team[team_id][frequency['variable']][frequency['value']] = {
                    'frequency_id': frequency['id'],
                    'won': frequency['won_count'],
                    'lost': frequency['lost_count']
                }

        return new_frequencies_by_team, existing_frequencies_by_team

    def _pls_update_frequency_table(self, new_frequencies_by_team, step, existing_frequencies_by_team=None):
        """ Create / update the frequency table in a cross company way, per team_id"""
        values_to_update = {}
        values_to_create = []
        if not existing_frequencies_by_team:
            existing_frequencies_by_team = {}
        # build the create multi + frequencies to update
        for team_id, new_frequencies in new_frequencies_by_team.items():
            for field, value in new_frequencies.items():
                # frequency already present ?
                current_frequencies = existing_frequencies_by_team.get(team_id, {})
                for param, result in value.items():
                    current_frequency_for_couple = current_frequencies.get(field, {}).get(param, {})
                    # If frequency already present : UPDATE IT
                    if current_frequency_for_couple:
                        new_won = current_frequency_for_couple['won'] + (result['won'] * step)
                        new_lost = current_frequency_for_couple['lost'] + (result['lost'] * step)
                        # ensure to have always positive frequencies
                        values_to_update[current_frequency_for_couple['frequency_id']] = {
                            'won_count': new_won if new_won > 0 else 0.1,
                            'lost_count': new_lost if new_lost > 0 else 0.1
                        }
                        continue

                    # Else, CREATE a new frequency record.
                    # We add + 0.1 in won and lost counts to avoid zero frequency issues
                    # should be +1 but it weights too much on small recordset.
                    values_to_create.append({
                        'variable': field,
                        'value': param,
                        'won_count': result['won'] + 0.1,
                        'lost_count': result['lost'] + 0.1,
                        'team_id': team_id if team_id else None  # team_id = 0 means no team_id
                    })

        LeadScoringFrequency = self.env['crm.lead.scoring.frequency'].sudo()
        for frequency_id, values in values_to_update.items():
            LeadScoringFrequency.browse(frequency_id).write(values)

        if values_to_create:
            LeadScoringFrequency.create(values_to_create)

    # ---------------------------------
    # Utility Tools for PLS
    # ---------------------------------

    # PLS:  Config Parameters
    # ---------------------
    def _pls_get_safe_start_date(self):
        """ As config_parameters does not accept Date field,
            we get directly the date formated string stored into the Char config field,
            as we directly use this string in the sql queries.
            To avoid sql injections when using this config param,
            we ensure the date string can be effectively a date."""
        str_date = self.env['ir.config_parameter'].sudo().get_param('crm.pls_start_date')
        if not fields.Date.to_date(str_date):
            return False
        return str_date

    def _pls_get_safe_fields(self):
        """ As config_parameters does not accept M2M field,
            we the fields from the formated string stored into the Char config field.
            To avoid sql injections when using that list, we return only the fields
            that are defined on the model. """
        pls_fields_config = self.env['ir.config_parameter'].sudo().get_param('crm.pls_fields')
        pls_fields = pls_fields_config.split(',') if pls_fields_config else []
        pls_safe_fields = [field for field in pls_fields if field in self._fields.keys()]
        return pls_safe_fields

    # Compute Automated Probability Tools
    # -----------------------------------
    def _pls_get_won_lost_total_count(self, team_results):
        """ Get all won and all lost + total :
               first stage can be used to know how many lost and won there is
               as won count are equals for all stage
               and first stage is always incremented in lost_count
        :param frequencies: lead_scoring_frequencies
        :return: won count, lost count and total count for all records in frequencies
        """
        # TODO : check if we need to handle specific team_id stages [for lost count] (if first stage in sequence is team_specific)
        first_stage_id = self.env['crm.stage'].search([('team_id', '=', False)], order='sequence', limit=1)
        if str(first_stage_id.id) not in team_results.get('stage_id', []):
            return 0, 0, 0
        stage_result = team_results['stage_id'][str(first_stage_id.id)]
        return stage_result['won'], stage_result['lost'], stage_result['won'] + stage_result['lost']

    # PLS: Rebuild Frequency Table Tools
    # ----------------------------------
    def _pls_prepare_frequencies(self, lead_values, leads_pls_fields, target_state=None):
        """new state is used when getting frequencies for leads that are changing to lost or won.
        Stays none if we are checking frequencies for leads already won or lost."""
        pls_fields = leads_pls_fields.copy()
        frequencies = dict((field, {}) for field in pls_fields)

        stage_ids = self.env['crm.stage'].search_read([], ['sequence', 'name', 'id'], order='sequence')
        stage_sequences = {stage['id']: stage['sequence'] for stage in stage_ids}

        # Increment won / lost frequencies by criteria (field / value couple)
        for values in lead_values:
            if target_state:  # ignore probability values if target state (as probability is the old value)
                won_count = values['count'] if target_state == 'won' else 0
                lost_count = values['count'] if target_state == 'lost' else 0
            else:
                won_count = values['count'] if values.get('probability', 0) == 100 else 0
                lost_count = values['count'] if values.get('probability', 1) == 0  else 0

            if 'tag_id' in values:
                frequencies = self._pls_increment_frequency_dict(frequencies, 'tag_id', values['tag_id'], won_count, lost_count)
                continue

            # Else, treat other fields
            if 'tag_id' in pls_fields:  # tag_id already treated here above.
                pls_fields.remove('tag_id')
            for field in pls_fields:
                if field not in values:
                    continue
                value = values[field]
                if value or field in ('email_state', 'phone_state'):
                    if field == 'stage_id':
                        if won_count:  # increment all stages if won
                            stages_to_increment = [stage['id'] for stage in stage_ids]
                        else:  # increment only current + previous stages if lost
                            current_stage_sequence = stage_sequences[value]
                            stages_to_increment = [stage['id'] for stage in stage_ids if stage['sequence'] <= current_stage_sequence]
                        for stage_id in stages_to_increment:
                            frequencies = self._pls_increment_frequency_dict(frequencies, field, stage_id, won_count, lost_count)
                    else:
                        frequencies = self._pls_increment_frequency_dict(frequencies, field, value, won_count, lost_count)

        return frequencies

    def _pls_increment_frequency_dict(self, frequencies, field, value, won, lost):
        value = str(value)  # Ensure we will always compare strings.
        if value not in frequencies[field]:
            frequencies[field][value] = {'won': won, 'lost': lost}
        else:
            frequencies[field][value]['won'] += won
            frequencies[field][value]['lost'] += lost
        return frequencies

    # Common PLS Tools
    # ----------------
    def _pls_get_lead_pls_values(self, domain=[]):
        """
        This methods builds a dict where, for each lead in self or matching the given domain,
        we will get a list of field/value couple.
        Due to onchange and create, we don't always have the id of the lead to recompute.
        When we update few records (one, typically) with onchanges, we build the lead_values (= couple field/value)
        using the ORM.
        To speed up the computation and avoid making too much DB read inside loops,
        we can give a domain to make sql queries to bypass the ORM.
        This domain will be used in sql queries to get the values for every lead matching the domain.
        :param domain: If set, we get all the leads values via unique sql queries (one for tags, one for other fields),
                            using the given domain on leads.
                       If not set, get lead values lead by lead using the ORM.
        :return: {lead_id: [(field1: value1), (field2: value2), ...], ...}
        """
        leads_values_dict = OrderedDict()
        pls_fields = ["stage_id", "team_id"] + self._pls_get_safe_fields()

        # Check if tag_ids is in the pls_fields and removed it from the list. The tags will be managed separately.
        use_tags = 'tag_ids' in pls_fields
        if use_tags:
            pls_fields.remove('tag_ids')

        if domain:
            # active_test = False as domain should take active into 'active' field it self
            from_clause, where_clause, where_params = self.env['crm.lead'].with_context(active_test=False)._where_calc(domain).get_sql()
            str_fields = ", ".join(["{}"] * len(pls_fields))
            args = [sql.Identifier(field) for field in pls_fields]

            # Get leads values
            self.flush(['probability'])
            query = """SELECT id, probability, %s
                        FROM %s
                        WHERE %s order by team_id asc"""
            query = sql.SQL(query % (str_fields, from_clause, where_clause)).format(*args)
            self._cr.execute(query, where_params)
            lead_results = self._cr.dictfetchall()

            if use_tags:
                # Get tags values
                query = """SELECT crm_lead.id as lead_id, t.id as tag_id
                            FROM %s
                            LEFT JOIN crm_tag_rel rel ON crm_lead.id = rel.lead_id
                            LEFT JOIN crm_tag t ON rel.tag_id = t.id
                            WHERE %s order by crm_lead.team_id asc"""
                args.append(sql.Identifier('tag_id'))
                query = sql.SQL(query % (from_clause, where_clause)).format(*args)
                self._cr.execute(query, where_params)
                tag_results = self._cr.dictfetchall()
            else:
                tag_results = []

            # get all (variable, value) couple for all in self
            for lead in lead_results:
                lead_values = []
                for field in pls_fields + ['probability']:  # add probability as used in _pls_prepare_frequencies (needed in rebuild mode)
                    value = lead[field]
                    if field == 'team_id':  # ignore team_id as stored separately in leads_values_dict[lead_id][team_id]
                        continue
                    if value or field == 'probability':  # 0 is a correct value for probability
                        lead_values.append((field, value))
                    elif field in ('email_state', 'phone_state'):  # As ORM reads 'None' as 'False', do the same here
                        lead_values.append((field, False))
                    leads_values_dict[lead['id']] = {'values': lead_values, 'team_id': lead['team_id'] or 0}

            for tag in tag_results:
                if tag['tag_id']:
                    leads_values_dict[tag['lead_id']]['values'].append(('tag_id', tag['tag_id']))
            return leads_values_dict
        else:
            for lead in self:
                lead_values = []
                for field in pls_fields:
                    if field == 'team_id':  # ignore team_id as stored separately in leads_values_dict[lead_id][team_id]
                        continue
                    value = lead[field].id if isinstance(lead[field], models.BaseModel) else lead[field]
                    if value or field in ('email_state', 'phone_state'):
                        lead_values.append((field, value))
                if use_tags:
                    for tag in lead.tag_ids:
                        lead_values.append(('tag_id', tag.id))
                leads_values_dict[lead.id] = {'values': lead_values, 'team_id': lead['team_id'].id}
            return leads_values_dict
