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

from dateutil.relativedelta import relativedelta

from flectra import api, fields, models, _
from flectra.tools.safe_eval import safe_eval
from flectra.exceptions import ValidationError


class Team(models.Model):
    _name = 'crm.team'
    _inherit = ['mail.alias.mixin', 'crm.team']

    use_leads = fields.Boolean('Leads', help="Check this box to filter and qualify incoming requests as leads before converting them into opportunities and assigning them to a salesperson.")
    use_opportunities = fields.Boolean('Pipeline', help="Check this box to manage a presales process with opportunities.")
    alias_id = fields.Many2one('mail.alias', string='Alias', ondelete="restrict", required=True, help="The email address associated with this channel. New emails received will automatically create new leads assigned to the channel.")
    unassigned_leads_count = fields.Integer(
        compute='_compute_unassigned_leads_count',
        string='Unassigned Leads', readonly=True)
    opportunities_count = fields.Integer(
        compute='_compute_opportunities',
        string='Number of open opportunities', readonly=True)
    opportunities_amount = fields.Integer(
        compute='_compute_opportunities',
        string='Amount of quotations to invoice', readonly=True)
    dashboard_graph_model = fields.Selection(selection_add=[('crm.opportunity.report', 'Pipeline')])
    dashboard_graph_period_pipeline = fields.Selection([
        ('week', 'Within a Week'),
        ('month', 'Within a Month'),
        ('year', 'Within a Year'),
    ], string='Expected to Close', help="The time period this channel's dashboard graph will consider.",
        compute="_compute_dashboard_graph_period_pipeline", inverse="_inverse_dashboard_graph_period_pipeline")
    dashboard_graph_group_pipeline = fields.Selection([
        ('day', 'Expected Closing Day'),
        ('week', 'Expected Closing Week'),
        ('month', 'Expected Closing Month'),
        ('user', 'Salesperson'),
        ('stage', 'Stage'),
    ], string='Group by', default='day', help="How this channel's dashboard graph will group the results.")

    def _compute_unassigned_leads_count(self):
        leads_data = self.env['crm.lead'].read_group([
            ('team_id', 'in', self.ids),
            ('type', '=', 'lead'),
            ('user_id', '=', False),
        ], ['team_id'], ['team_id'])
        counts = {datum['team_id'][0]: datum['team_id_count'] for datum in leads_data}
        for team in self:
            team.unassigned_leads_count = counts.get(team.id, 0)

    def _compute_opportunities(self):
        opportunity_data = self.env['crm.lead'].read_group([
            ('team_id', 'in', self.ids),
            ('probability', '<', 100),
            ('type', '=', 'opportunity'),
        ], ['planned_revenue', 'probability', 'team_id'], ['team_id'])
        counts = {datum['team_id'][0]: datum['team_id_count'] for datum in opportunity_data}
        amounts = {datum['team_id'][0]: (datum['planned_revenue'] * datum['probability'] / 100) for datum in opportunity_data}
        for team in self:
            team.opportunities_count = counts.get(team.id, 0)
            team.opportunities_amount = amounts.get(team.id, 0)

    def _compute_dashboard_graph_period_pipeline(self):
        for channel in self:
            channel.dashboard_graph_period_pipeline = channel.dashboard_graph_period

    def _inverse_dashboard_graph_period_pipeline(self):
        for channel in self.filtered(lambda ch: ch.dashboard_graph_model == 'crm.opportunity.report'):
                channel.dashboard_graph_period = channel.dashboard_graph_period_pipeline

    def get_alias_model_name(self, vals):
        return 'crm.lead'

    def get_alias_values(self):
        has_group_use_lead = self.env.user.has_group('crm.group_use_lead')
        values = super(Team, self).get_alias_values()
        values['alias_defaults'] = defaults = safe_eval(self.alias_defaults or "{}")
        defaults['type'] = 'lead' if has_group_use_lead and self.use_leads else 'opportunity'
        defaults['team_id'] = self.id
        return values

    @api.onchange('use_leads', 'use_opportunities')
    def _onchange_use_leads_opportunities(self):
        if not self.use_leads and not self.use_opportunities:
            self.alias_name = False
        if not self.use_opportunities and self.use_leads:
            self.use_leads = False

    @api.onchange('team_type')
    def _onchange_team_type(self):
        if self.team_type == 'sales':
            self.use_opportunities = True
            self.use_leads = lambda self: self.user_has_groups('crm.group_use_lead')
            self.dashboard_graph_model = 'crm.opportunity.report'
        else:
            self.use_opportunities = False
            self.use_leads = False
        return super(Team, self)._onchange_team_type()

    @api.onchange('dashboard_graph_model')
    def _onchange_dashboard_graph_model(self):
        if self.dashboard_graph_model == 'crm.opportunity.report':
            self.dashboard_graph_period_pipeline = self.dashboard_graph_period
            self.dashboard_graph_group_pipeline = self.dashboard_graph_group
        else:
            self.dashboard_graph_period = self.dashboard_graph_period_pipeline
            if not self.dashboard_graph_group:
                self.dashboard_graph_group = self._fields['dashboard_graph_group'].default(self)

    @api.onchange('dashboard_graph_group_pipeline')
    def _onchange_dashboard_graph_group_pipeline(self):
        if self.dashboard_graph_group_pipeline == 'stage':
            self.dashboard_graph_group = False
        else:
            self.dashboard_graph_group = self.dashboard_graph_group_pipeline

    @api.constrains('dashboard_graph_model', 'use_opportunities')
    def _check_graph_model(self):
        if not self.use_opportunities and self.dashboard_graph_model == 'crm.opportunity.report':
            raise ValidationError(_("Dashboard graph content cannot be Pipeline if the sales channel doesn't use it. (Pipeline is unchecked.)"))

    @api.multi
    def write(self, vals):
        result = super(Team, self).write(vals)
        if 'use_leads' in vals or 'alias_defaults' in vals:
            for team in self:
                team.alias_id.write(team.get_alias_values())
        return result

    #TODO JEM : refactor this stuff with xml action, proper customization,
    @api.model
    def action_your_pipeline(self):
        action = self.env.ref('crm.crm_lead_opportunities_tree_view').read()[0]
        user_team_id = self.env.user.sale_team_id.id
        if not user_team_id:
            user_team_id = self.search([], limit=1).id
            action['help'] = """<p class='oe_view_nocontent_create'>Click here to add new opportunities</p><p>
    Looks like you are not a member of a sales channel. You should add yourself
    as a member of one of the sales channel.
</p>"""
            if user_team_id:
                action['help'] += "<p>As you don't belong to any sales channel, Flectra opens the first one by default.</p>"

        action_context = safe_eval(action['context'], {'uid': self.env.uid})
        if user_team_id:
            action_context['default_team_id'] = user_team_id

        tree_view_id = self.env.ref('crm.crm_case_tree_view_oppor').id
        form_view_id = self.env.ref('crm.crm_case_form_view_oppor').id
        kanb_view_id = self.env.ref('crm.crm_case_kanban_view_leads').id
        action['views'] = [
                [kanb_view_id, 'kanban'],
                [tree_view_id, 'tree'],
                [form_view_id, 'form'],
                [False, 'graph'],
                [False, 'calendar'],
                [False, 'pivot']
            ]
        action['context'] = action_context
        return action

    def _compute_dashboard_button_name(self):
        opportunity_teams = self.filtered('use_opportunities')
        opportunity_teams.update({'dashboard_button_name': _("Pipeline")})
        super(Team, self - opportunity_teams)._compute_dashboard_button_name()

    def action_primary_channel_button(self):
        if self.use_opportunities:
            action = self.env.ref('crm.crm_case_form_view_salesteams_opportunity').read()[0]
            return action
        return super(Team, self).action_primary_channel_button()

    def _graph_get_dates(self, today):
        """ return a coherent start and end date for the dashboard graph according to the graph settings.
        """
        if self.dashboard_graph_model == 'crm.opportunity.report':
            if self.dashboard_graph_group == 'month':
                start_date = today.replace(day=1)
            elif self.dashboard_graph_group == 'week':
                start_date = today - relativedelta(days=today.isocalendar()[2] - 1)
            else:
                start_date = today

            if self.dashboard_graph_period == 'week':
                end_date = today + relativedelta(weeks=1)
            elif self.dashboard_graph_period == 'year':
                end_date = today + relativedelta(years=1)
            else:
                end_date = today + relativedelta(months=1)

            # we take the end of the preceding month/week/day if we group by month/week/day
            # (to avoid having twice the same month/week/day from different years/month/week)
            if self.dashboard_graph_group == 'month':
                end_date = end_date.replace(day=1) - relativedelta(days=1)
            elif self.dashboard_graph_group == 'week':
                end_date -= relativedelta(days=end_date.isocalendar()[2])
            else:
                end_date -= relativedelta(days=1)

            return [start_date, end_date]
        return super(Team, self)._graph_get_dates(today)

    def _get_graph(self):
        graph_datas = super(Team, self)._get_graph()
        if self.dashboard_graph_model == 'crm.opportunity.report' and self.dashboard_graph_group_pipeline == 'stage':
            stage_ids = [d['label'] for d in graph_datas[0]['values'] if d['label'] is not None]
            stage_data = self.env['crm.stage'].browse(stage_ids).read(['sequence', 'name'])
            stage_data = {d['id']: {'name': d['name'], 'sequence': d['sequence']} for d in stage_data}
            # use "Undefined" stage for unset stage records
            stage_data[None] = {'name': _('Undefined'), 'sequence': -1}
            graph_datas[0]['values'] = sorted(graph_datas[0]['values'], key=lambda el: stage_data[el['label']]['sequence'])
            for gdata in graph_datas[0]['values']:
                gdata['label'] = stage_data[gdata['label']]['name']
        return graph_datas

    def _graph_date_column(self):
        if self.dashboard_graph_model == 'crm.opportunity.report':
            return 'date_deadline'
        return super(Team, self)._graph_date_column()

    def _graph_x_query(self):
        if self.dashboard_graph_model == 'crm.opportunity.report' and self.dashboard_graph_group_pipeline == 'stage':
            return 'stage_id'
        return super(Team, self)._graph_x_query()

    def _graph_y_query(self):
        if self.dashboard_graph_model == 'crm.opportunity.report':
            return 'SUM(expected_revenue)'
        return super(Team, self)._graph_y_query()

    def _graph_title_and_key(self):
        if self.dashboard_graph_model == 'crm.opportunity.report':
            return ['', _('Pipeline: Expected Revenue')] # no more title
        return super(Team, self)._graph_title_and_key()