# -*- coding: utf-8 -*-

#    Copyright 2017 Fabien Bourgeois <fabien@yaltik.com>
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU Affero General Public License as
#    published by the Free Software Foundation, either version 3 of the
#    License, or (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU Affero General Public License for more details.
#
#    You should have received a copy of the GNU Affero General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.


""" CRM Action """

from datetime import timedelta
from odoo import models, fields, api, _


class CrmAction(models.Model):
    """ CRM Action """
    _name = 'crm.action'
    _description = 'CRM Action'
    _rec_name = 'display_name'

    display_name = fields.Char(compute='_compute_display_name', store=True)

    state = fields.Selection([('draft', 'Todo'), ('done', 'Done'),
                              ('cancel', 'Canceled')], string='Status',
                             required=True, default='draft')
    priority = fields.Selection([('0', 'Not evaluated'), ('1', 'Low'),
                                 ('2', 'Medium'), ('3', 'High'),
                                 ('4', 'Urgent')],
                                default='0', index=True)
    details = fields.Text()

    partner_id = fields.Many2one('res.partner', string='Customer', index=True)
    parent_id = fields.Many2one(related='partner_id.parent_id')
    date = fields.Datetime(required=True, default=fields.Date.context_today)
    user_id = fields.Many2one('res.users', string='User', required=True,
                              default=lambda self: self.env.user)
    lead_id = fields.Many2one('crm.lead', string='Lead', ondelete='cascade')
    event_id = fields.Many2one('calendar.event', 'Calendar event', ondelete='cascade',
                               copy=False)
    action_type_id = fields.Many2one(
        'crm.action.type', string='Type', required=True,
        default=lambda self: self.env['crm.action.type'].search([], limit=1))
    action_type_name = fields.Char(related='action_type_id.name')

    @api.onchange('partner_id')
    def onchange_partner(self):
        """ If partner changes, adapts lead to False """
        for action in self:
            if action.partner_id and action.lead_id:
                if action.lead_id.partner_id != action.partner_id:
                    action.lead_id = False


    @api.depends('action_type_id.name', 'details')
    def _compute_display_name(self):
        for action in self:
            details = u'...'
            if action.details:
                details = u' '.join(action.details.split()[:5]) + details
            action.display_name = u'[{}]{}'.format(action.action_type_name,
                                                   details)
    @api.multi
    def set_to_draft(self):
        """ Set actions to draft """
        self.write({'state': 'draft'})

    @api.multi
    def set_to_done(self):
        """ Set actions to done """
        self.write({'state': 'done'})

    @api.multi
    def create_linked_event(self):
        """ Creates a linked event """
        for action in self:
            if not action.event_id:
                attendees = [action.user_id.partner_id.id]
                if action.partner_id:
                    attendees.append(action.partner_id.id)
                data = {'start': action.date,
                        'stop': action.date,
                        'duration': 1.0,
                        'allday': False,
                        'name': action.display_name,
                        'description': action.details,
                        'privacy': 'confidential',
                        'partner_ids': [(6, False, attendees)],
                        'partner_location_id': action.partner_id.id or False}
                action.event_id = self.env['calendar.event'].create(data)
                return {'type': 'ir.actions.act_window',
                        'name': _('Linked event'),
                        'res_model': 'calendar.event',
                        'res_id': action.event_id.id,
                        'view_mode': 'form',
                        'view_type': 'form',
                        'flags': {'initial_mode': 'edit'}}

    @api.multi
    def remove_linked_event(self):
        """ Removes linked event and deletes it """
        for action in self:
            if action.event_id:
                event = action.event_id
                action.event_id = False
                event.unlink()

    @api.multi
    def write(self, vals):
        """ Ensures date event and basic partner_id coherence """
        super(CrmAction, self).write(vals)
        for action in self:
            if action.event_id:
                if action.event_id.start != action.date:
                    stop = fields.Datetime.from_string(action.date) + \
                        timedelta(hours=action.event_id.duration)
                    action.event_id.write({'start': action.date,
                                           'stop': fields.Datetime.to_string(stop)})
                if action.partner_id and \
                        action.partner_id not in action.event_id.partner_ids:
                    action.event_id.partner_ids |= action.partner_id
        return True


class CrmActionType(models.Model):
    """ CRM Action Type """
    _name = 'crm.action.type'
    _description = 'CRM Action Type'
    _order = 'priority'

    name = fields.Char(required=True)
    priority = fields.Integer(required=True, default=0)
    active = fields.Boolean(default=True)