###################################################################################
# 
#    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 time
import logging
import datetime
import dateutil

from odoo import _
from odoo import models, api
from odoo.tools.safe_eval import safe_eval
from odoo.tools.misc import DEFAULT_SERVER_DATETIME_FORMAT

_logger = logging.getLogger(__name__)

_types = {
    'days': lambda interval: datetime.timedelta(days=interval),
    'years': lambda interval: datetime.timedelta(weeks=interval*52),
    'hours': lambda interval: datetime.timedelta(hours=interval),
    'weeks': lambda interval: datetime.timedelta(weeks=interval),
    'months': lambda interval: datetime.timedelta(days=interval*30),
    'minutes': lambda interval: datetime.timedelta(minutes=interval),
}

class AutoVacuum(models.AbstractModel):
    
    _inherit = 'ir.autovacuum'
    
    @api.model
    def power_on(self, *args, **kwargs):
        res = super(AutoVacuum, self).power_on(*args, **kwargs)
        rules = self.env['muk_autovacuum.rules'].sudo().search([], order='sequence asc')
        for rule in rules:
            model = self.env[rule.model.model].sudo()
            records = self.env[rule.model.model]
            if rule.state == 'time':
                computed_time = datetime.datetime.utcnow() - _types[rule.time_type](rule.time)
                domain = [(rule.time_field.name, '<', computed_time.strftime(DEFAULT_SERVER_DATETIME_FORMAT))]
                if rule.protect_starred and "starred" in rule.model.field_id.mapped("name"):
                    domain.append(('starred', '=', False))
                if rule.only_inactive and "active" in rule.model.field_id.mapped("name"):
                    domain.append(('active', '=', False))
                _logger.info(_("GC domain: %s"), domain)
                records = model.with_context({'active_test': False}).search(domain)
            elif rule.state == 'size':
                size = rule.size if rule.size_type == 'fixed' else rule.size_parameter_value
                count = model.with_context({'active_test': False}).search([], count=True)
                if count > size:
                    limit = count - size
                    _logger.info(_("GC domain: [] order: %s limit: %s"), rule.size_order, limit)
                    records = model.with_context({'active_test': False}).search([], order=rule.size_order, limit=limit)
            elif rule.state == 'domain':
                _logger.info(_("GC domain: %s"), rule.domain)
                context = {
                    'datetime': datetime,
                    'dateutil': dateutil,
                    'time': time,
                    'uid': self.env.uid,
                    'user': self.env.user}
                domain = safe_eval(rule.domain, context)
                records = model.with_context({'active_test': False}).search(domain)
            if rule.only_attachments:
                attachments = self.env['ir.attachment'].sudo().search([
                    ('res_model', '=', rule.model.model),
                    ('res_id', 'in', records.mapped('id'))])
                count = len(attachments)
                attachments.unlink()
                _logger.info(_("GC'd %s attachments from %s entries"), count, rule.model.model)
            else:
                count = len(records)
                records.unlink()
                _logger.info(_("GC'd %s %s records"), count, rule.model.model)
        return res