# Copyright 2018 Camptocamp SA
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).

import json

from odoo import api, fields, models


class MailTrackingValue(models.Model):

    _inherit = "mail.tracking.value"

    new_value_formatted = fields.Char(
        compute='_compute_formatted_value',
        string='New value',
    )
    old_value_formatted = fields.Char(
        compute='_compute_formatted_value',
        string='Old value',
    )
    record_name = fields.Char(
        related='mail_message_id.record_name',
    )
    model = fields.Char(
        related='mail_message_id.model',
        store='True',
        string='Model',
    )

    @api.depends('new_value_char', 'new_value_integer', 'new_value_float',
                 'new_value_text', 'new_value_datetime', 'new_value_monetary',
                 'old_value_char', 'old_value_integer', 'old_value_float',
                 'old_value_text', 'old_value_datetime', 'old_value_monetary')
    def _compute_formatted_value(self):
        """ Sets the value formatted field used in the view """
        for record in self:
            if record.field_type in ('many2many', 'one2many', 'char'):
                record.new_value_formatted = record.new_value_char
                record.old_value_formatted = record.old_value_char
            elif record.field_type == 'integer':
                record.new_value_formatted = str(record.new_value_integer)
                record.old_value_formatted = str(record.old_value_integer)
            elif record.field_type == 'float':
                record.new_value_formatted = str(record.new_value_float)
                record.old_value_formatted = str(record.old_value_float)
            elif record.field_type == 'monetary':
                record.new_value_formatted = str(record.new_value_monetary)
                record.old_value_formatted = str(record.old_value_monetary)
            elif record.field_type == 'datetime':
                record.new_value_formatted = str(record.new_value_datetime)
                record.old_value_formatted = str(record.old_value_datetime)
            elif record.field_type == 'text':
                record.new_value_formatted = record.new_value_text
                record.old_value_formatted = record.old_value_text

    @api.model
    def create_tracking_values(self, old_value, new_value, col_name, col_info):
        """ Add tacking capabilities for many2many and one2many fields """
        if col_info['type'] in ('many2many', 'one2many'):

            def get_values(source, prefix):
                if source:
                    names = ', '.join(source.mapped('display_name'))
                    json_ids = json.dumps(source.ids)
                else:
                    names = ''
                    json_ids = json.dumps([])
                return {
                    '{}_value_char'.format(prefix): names,
                    '{}_value_text'.format(prefix): json_ids,
                }

            values = {
                'field': col_name,
                'field_desc': col_info['string'],
                'field_type': col_info['type'],
            }
            values.update(get_values(old_value, 'old'))
            values.update(get_values(new_value, 'new'))
            return values
        else:
            return super().create_tracking_values(
                old_value, new_value,
                col_name, col_info
            )