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

import uuid

from odoo import api, fields, models, tools


class Rating(models.Model):

    _name = "rating.rating"
    _description = "Rating"
    _order = 'write_date desc'
    _rec_name = 'res_name'
    _sql_constraints = [
        ('rating_range', 'check(rating >= 0 and rating <= 10)', 'Rating should be between 0 to 10'),
    ]

    @api.one
    @api.depends('res_model', 'res_id')
    def _compute_res_name(self):
        name = self.env[self.res_model].sudo().browse(self.res_id).name_get()
        self.res_name = name and name[0][1] or ('%s/%s') % (self.res_model, self.res_id)

    @api.model
    def new_access_token(self):
        return uuid.uuid4().hex

    res_name = fields.Char(string='Resource Name', compute='_compute_res_name', store=True, help="The name of the rated resource.")
    res_model = fields.Char(string='Document Model', required=True, help="Model name of the rated object", index=True)
    res_id = fields.Integer(string='Document ID', required=True, help="Identifier of the rated object", index=True)
    rated_partner_id = fields.Many2one('res.partner', string="Rated Partner", help="Owner of the rated resource")
    partner_id = fields.Many2one('res.partner', string='Customer', help="Author of the rating")
    rating = fields.Float(string="Rating", group_operator="avg", default=0, help="Rating value: 0=Unhappy, 10=Happy")
    feedback = fields.Text('Feedback reason', help="Reason of the rating")
    message_id = fields.Many2one('mail.message', string="Linked message", help="Associated message when posting a review. Mainly used in website addons.", index=True)
    access_token = fields.Char('Security Token', default=new_access_token, help="Access token to set the rating of the value")
    consumed = fields.Boolean(string="Filled Rating", help="Enabled if the rating has been filled.")

    @api.multi
    def reset(self):
        for record in self:
            record.write({
                'rating': 0,
                'access_token': record.new_access_token(),
                'feedback': False,
                'consumed': False,
            })


class RatingMixin(models.AbstractModel):
    _name = 'rating.mixin'
    _description = "Rating Mixin"

    rating_ids = fields.One2many('rating.rating', 'res_id', string='Rating', domain=lambda self: [('res_model', '=', self._name)])
    rating_last_value = fields.Float('Rating Last Value', compute='_compute_rating_last_value', compute_sudo=True, store=True)
    rating_count = fields.Integer('Rating count', compute="_compute_rating_count")

    @api.multi
    @api.depends('rating_ids.rating')
    def _compute_rating_last_value(self):
        for record in self:
            ratings = self.env['rating.rating'].search([('res_model', '=', self._name), ('res_id', '=', record.id)], limit=1)
            if ratings:
                record.rating_last_value = ratings.rating

    @api.multi
    def _compute_rating_count(self):
        read_group_res = self.env['rating.rating'].read_group(
            [('res_model', '=', self._name), ('res_id', 'in', self.ids), ('consumed', '=', True)],
            ['res_id'], groupby=['res_id'])
        result = dict.fromkeys(self.ids, 0)
        for data in read_group_res:
            result[data['res_id']] += data['res_id_count']
        for record in self:
            record.rating_count = result.get(record.id)

    def rating_get_partner_id(self):
        if hasattr(self, 'partner_id') and self.partner_id:
            return self.partner_id
        return self.env['res.partner']

    def rating_get_rated_partner_id(self):
        if hasattr(self, 'user_id') and self.user_id.partner_id:
            return self.user_id.partner_id
        return self.env['res.partner']

    def rating_get_access_token(self, partner=None):
        if not partner:
            partner = self.rating_get_partner_id()
        rated_partner = self.rating_get_rated_partner_id()
        ratings = self.rating_ids.filtered(lambda x: x.partner_id.id == partner.id and not x.consumed)
        if not ratings:
            rating = self.env['rating.rating'].create({'partner_id': partner.id, 'rated_partner_id': rated_partner.id, 'res_model': self._name, 'res_id': self.id})
        else:
            rating = ratings[0]
        return rating.access_token

    @api.multi
    def rating_send_request(self, template, partner=None, rated_partner=None, reuse_rating=True, force_send=True):
        """ This method send rating request by email, using a template given
        in parameter. """
        for record in self:
            template.send_mail(record.id, force_send=force_send)

    @api.multi
    def rating_apply(self, rate, token=None, feedback=None, subtype=None):
        """ Apply a rating given a token. If the current model inherits from
        mail.thread mixing, a message is posted on its chatter.
        :param rate : the rating value to apply
        :type rate : float
        :param token : access token
        :param feedback : additional feedback
        :type feedback : string
        :param subtype : subtype for mail
        :type subtype : string
        :returns rating.rating record
        """
        Rating, rating = self.env['rating.rating'], None
        if token:
            rating = self.env['rating.rating'].search([('access_token', '=', token)], limit=1)
        else:
            rating = Rating.search([('res_model', '=', self._name), ('res_id', '=', self.ids[0])], limit=1)
        if rating:
            rating.write({'rating': rate, 'feedback': feedback, 'consumed': True})
            if hasattr(self, 'message_post'):
                feedback = tools.plaintext2html(feedback or '')
                self.message_post(
                    body="<img src='/rating/static/src/img/rating_%s.png' style='width:20px;height:20px;float:left;margin-right: 5px;'/>%s"
                    % (rate, feedback),
                    subtype=subtype or "mail.mt_comment",
                    author_id=rating.partner_id and rating.partner_id.id or None  # None will set the default author in mail_thread.py
                )
            if hasattr(self, 'stage_id') and self.stage_id and hasattr(self.stage_id, 'auto_validation_kanban_state') and self.stage_id.auto_validation_kanban_state:
                if rating.rating > 5:
                    self.write({'kanban_state': 'done'})
                if rating.rating < 5:
                    self.write({'kanban_state': 'blocked'})
        return rating

    @api.multi
    def rating_get_repartition(self, add_stats=False, domain=None):
        """ get the repatition of rating grade for the given res_ids.
            :param add_stats : flag to add stat to the result
            :type add_stats : boolean
            :param domain : optional extra domain of the rating to include/exclude in repartition
            :return dictionnary
                if not add_stats, the dict is like
                    - key is the rating value (integer)
                    - value is the number of object (res_model, res_id) having the value
                otherwise, key is the value of the information (string) : either stat name (avg, total, ...) or 'repartition'
                containing the same dict if add_stats was False.
        """
        base_domain = [('res_model', '=', self._name), ('res_id', 'in', self.ids), ('rating', '>=', 1), ('consumed', '=', True)]
        if domain:
            base_domain += domain
        data = self.env['rating.rating'].read_group(base_domain, ['rating'], ['rating', 'res_id'])
        # init dict with all posible rate value, except 0 (no value for the rating)
        values = dict.fromkeys(range(1, 11), 0)
        values.update((d['rating'], d['rating_count']) for d in data)
        # add other stats
        if add_stats:
            rating_number = sum(values.values())
            result = {
                'repartition': values,
                'avg': sum([float(key * values[key]) for key in values]) / rating_number if rating_number > 0 else 0,
                'total': reduce(lambda x, y: y['rating_count'] + x, data, 0),
            }
            return result
        return values

    @api.multi
    def rating_get_grades(self, domain=None):
        """ get the repatition of rating grade for the given res_ids.
            :param domain : optional domain of the rating to include/exclude in grades computation
            :return dictionnary where the key is the grade (great, okay, bad), and the value, the number of object (res_model, res_id) having the grade
                    the grade are compute as    0-30% : Bad
                                                31-69%: Okay
                                                70-100%: Great
        """
        data = self.rating_get_repartition(domain=domain)
        res = dict.fromkeys(['great', 'okay', 'bad'], 0)
        for key in data:
            if key >= 7:
                res['great'] += data[key]
            elif key > 3:
                res['okay'] += data[key]
            else:
                res['bad'] += data[key]
        return res

    @api.multi
    def rating_get_stats(self, domain=None):
        """ get the statistics of the rating repatition
            :param domain : optional domain of the rating to include/exclude in statistic computation
            :return dictionnary where
                - key is the the name of the information (stat name)
                - value is statistic value : 'percent' contains the repartition in percentage, 'avg' is the average rate
                  and 'total' is the number of rating
        """
        data = self.rating_get_repartition(domain=domain, add_stats=True)
        result = {
            'avg': data['avg'],
            'total': data['total'],
            'percent': dict.fromkeys(range(1, 11), 0),
        }
        for rate in data['repartition']:
            result['percent'][rate] = (data['repartition'][rate] * 100) / data['total'] if data['total'] > 0 else 0
        return result