# Author: Tyler Fenby <tylerfenby@gmail.com>
# URL: http://code.google.com/p/sickbeard/
#
# This file is part of SickRage.
#
# SickRage is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# SickRage 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with SickRage.  If not, see <http://www.gnu.org/licenses/>.

from sickbeard import db
from sickbeard.common import Quality


# Add new migrations at the bottom of the list; subclass the previous migration.
class InitialSchema(db.SchemaUpgrade):
    def test(self):
        return self.hasTable('db_version')

    def execute(self):
        queries = [
            ('CREATE TABLE failed (release TEXT, size NUMERIC, provider TEXT);',),
            ('CREATE TABLE history (date NUMERIC, size NUMERIC, release TEXT, provider TEXT, old_status NUMERIC DEFAULT 0, showid NUMERIC DEFAULT -1, season NUMERIC DEFAULT -1, episode NUMERIC DEFAULT -1);',),
            ('CREATE TABLE db_version (db_version INTEGER);',),
            ('INSERT INTO db_version (db_version) VALUES (1);',),
        ]
        for query in queries:
            if len(query) == 1:
                self.connection.action(query[0])
            else:
                self.connection.action(query[0], query[1:])


class SizeAndProvider(InitialSchema):
    def test(self):
        return self.hasColumn('failed', 'size') and self.hasColumn('failed', 'provider')

    def execute(self):
        self.addColumn('failed', 'size', 'NUMERIC')
        self.addColumn('failed', 'provider', 'TEXT', '')


class History(SizeAndProvider):
    """Snatch history that can't be modified by the user"""

    def test(self):
        return self.hasTable('history')

    def execute(self):
        self.connection.action('CREATE TABLE history (date NUMERIC, ' +
                               'size NUMERIC, release TEXT, provider TEXT);')


class HistoryStatus(History):
    """Store episode status before snatch to revert to if necessary"""

    def test(self):
        return self.hasColumn('history', 'old_status')

    def execute(self):
        self.addColumn('history', 'old_status', 'NUMERIC', Quality.NONE)
        self.addColumn('history', 'showid', 'NUMERIC', '-1')
        self.addColumn('history', 'season', 'NUMERIC', '-1')
        self.addColumn('history', 'episode', 'NUMERIC', '-1')
