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

###################################################################################
# 
#    Copyright (C) 2018 MuK IT GmbH
#
#    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/>.
#
###################################################################################

import re
import pytz
import hashlib
import logging
import psycopg2
import dateutil

from odoo import _
from odoo import models, api, fields
from odoo.tools import ustr, pycompat, human_size

_logger = logging.getLogger(__name__)

_read_group_process_groupby = models.BaseModel._read_group_process_groupby

def _read_group_process_groupby_hour(self, gb, query):
    split = gb.split(':')
    field_type = self._fields[split[0]].type
    gb_function = split[1] if len(split) == 2 else None
    temporal = field_type in ('date', 'datetime')
    tz_convert = field_type == 'datetime' and self._context.get('tz') in pytz.all_timezones
    qualified_field = self._inherits_join_calc(self._table, split[0], query)
    if temporal and gb_function in ['hour']:
        if tz_convert:
            qualified_field = "timezone('%s', timezone('UTC',%s))" % (self._context.get('tz', 'UTC'), qualified_field)
        qualified_field = "date_trunc('%s', %s)" % (gb_function or 'month', qualified_field)
        if field_type == 'boolean':
            qualified_field = "coalesce(%s,false)" % qualified_field
        return {
            'field': split[0],
            'groupby': gb,
            'type': field_type, 
            'display_format': 'hh:00 dd MMM',
            'interval': dateutil.relativedelta.relativedelta(hours=1),                
            'tz_convert': tz_convert,
            'qualified_field': qualified_field
        }
    return _read_group_process_groupby(self, gb, query)
    
     
    
models.BaseModel._read_group_process_groupby = _read_group_process_groupby_hour