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

from odoo import api, fields, models
from odoo.osv import expression


class MassMailingContactListRel(models.Model):
    """ Intermediate model between mass mailing list and mass mailing contact
        Indicates if a contact is opted out for a particular list
    """
    _name = 'mailing.contact.subscription'
    _description = 'Mass Mailing Subscription Information'
    _table = 'mailing_contact_list_rel'
    _rec_name = 'contact_id'

    contact_id = fields.Many2one('mailing.contact', string='Contact', ondelete='cascade', required=True)
    list_id = fields.Many2one('mailing.list', string='Mailing List', ondelete='cascade', required=True)
    opt_out = fields.Boolean(string='Opt Out',
                             help='The contact has chosen not to receive mails anymore from this list', default=False)
    unsubscription_date = fields.Datetime(string='Unsubscription Date')
    message_bounce = fields.Integer(related='contact_id.message_bounce', store=False, readonly=False)
    is_blacklisted = fields.Boolean(related='contact_id.is_blacklisted', store=False, readonly=False)

    _sql_constraints = [
        ('unique_contact_list', 'unique (contact_id, list_id)',
         'A mailing contact cannot subscribe to the same mailing list multiple times.')
    ]

    @api.model
    def create(self, vals):
        if 'opt_out' in vals:
            vals['unsubscription_date'] = vals['opt_out'] and fields.Datetime.now()
        return super(MassMailingContactListRel, self).create(vals)

    def write(self, vals):
        if 'opt_out' in vals:
            vals['unsubscription_date'] = vals['opt_out'] and fields.Datetime.now()
        return super(MassMailingContactListRel, self).write(vals)


class MassMailingContact(models.Model):
    """Model of a contact. This model is different from the partner model
    because it holds only some basic information: name, email. The purpose is to
    be able to deal with large contact list to email without bloating the partner
    base."""
    _name = 'mailing.contact'
    _inherit = ['mail.thread.blacklist']
    _description = 'Mailing Contact'
    _order = 'email'

    def default_get(self, fields):
        """ When coming from a mailing list we may have a default_list_ids context
        key. We should use it to create subscription_list_ids default value that
        are displayed to the user as list_ids is not displayed on form view. """
        res = super(MassMailingContact, self).default_get(fields)
        if 'subscription_list_ids' in fields and not res.get('subscription_list_ids'):
            list_ids = self.env.context.get('default_list_ids')
            if 'default_list_ids' not in res and list_ids and isinstance(list_ids, (list, tuple)):
                res['subscription_list_ids'] = [
                    (0, 0, {'list_id': list_id}) for list_id in list_ids]
        return res

    name = fields.Char()
    company_name = fields.Char(string='Company Name')
    title_id = fields.Many2one('res.partner.title', string='Title')
    email = fields.Char('Email')
    list_ids = fields.Many2many(
        'mailing.list', 'mailing_contact_list_rel',
        'contact_id', 'list_id', string='Mailing Lists')
    subscription_list_ids = fields.One2many('mailing.contact.subscription', 'contact_id', string='Subscription Information')
    country_id = fields.Many2one('res.country', string='Country')
    tag_ids = fields.Many2many('res.partner.category', string='Tags')
    opt_out = fields.Boolean('Opt Out', compute='_compute_opt_out', search='_search_opt_out',
                             help='Opt out flag for a specific mailing list.'
                                  'This field should not be used in a view without a unique and active mailing list context.')

    @api.model
    def _search_opt_out(self, operator, value):
        # Assumes operator is '=' or '!=' and value is True or False
        if operator != '=':
            if operator == '!=' and isinstance(value, bool):
                value = not value
            else:
                raise NotImplementedError()

        if 'default_list_ids' in self._context and isinstance(self._context['default_list_ids'], (list, tuple)) and len(self._context['default_list_ids']) == 1:
            [active_list_id] = self._context['default_list_ids']
            contacts = self.env['mailing.contact.subscription'].search([('list_id', '=', active_list_id)])
            return [('id', 'in', [record.contact_id.id for record in contacts if record.opt_out == value])]
        else:
            return expression.FALSE_DOMAIN if value else expression.TRUE_DOMAIN

    @api.depends('subscription_list_ids')
    @api.depends_context('default_list_ids')
    def _compute_opt_out(self):
        if 'default_list_ids' in self._context and isinstance(self._context['default_list_ids'], (list, tuple)) and len(self._context['default_list_ids']) == 1:
            [active_list_id] = self._context['default_list_ids']
            for record in self:
                active_subscription_list = record.subscription_list_ids.filtered(lambda l: l.list_id.id == active_list_id)
                record.opt_out = active_subscription_list.opt_out
        else:
            for record in self:
                record.opt_out = False

    def get_name_email(self, name):
        name, email = self.env['res.partner']._parse_partner_name(name)
        if name and not email:
            email = name
        if email and not name:
            name = email
        return name, email

    @api.model_create_multi
    def create(self, vals_list):
        """ Synchronize default_list_ids (currently used notably for computed
        fields) default key with subscription_list_ids given by user when creating
        contacts.

        Those two values have the same purpose, adding a list to to the contact
        either through a direct write on m2m, either through a write on middle
        model subscription.

        This is a bit hackish but is due to default_list_ids key being
        used to compute oupt_out field. This should be cleaned in master but here
        we simply try to limit issues while keeping current behavior. """
        default_list_ids = self._context.get('default_list_ids')
        default_list_ids = default_list_ids if isinstance(default_list_ids, (list, tuple)) else []

        if default_list_ids:
            for vals in vals_list:
                current_list_ids = []
                subscription_ids = vals.get('subscription_list_ids') or []
                for subscription in subscription_ids:
                    if len(subscription) == 3:
                        current_list_ids.append(subscription[2]['list_id'])
                for list_id in set(default_list_ids) - set(current_list_ids):
                    subscription_ids.append((0, 0, {'list_id': list_id}))
                vals['subscription_list_ids'] = subscription_ids

        return super(MassMailingContact, self.with_context(default_list_ids=False)).create(vals_list)

    @api.model
    def name_create(self, name):
        name, email = self.get_name_email(name)
        contact = self.create({'name': name, 'email': email})
        return contact.name_get()[0]

    @api.model
    def add_to_list(self, name, list_id):
        name, email = self.get_name_email(name)
        contact = self.create({'name': name, 'email': email, 'list_ids': [(4, list_id)]})
        return contact.name_get()[0]

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