# Copyright 2012 Canonical.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.


def upgrade(migrate_engine):

    if migrate_engine.name == "mysql":
        tables = ['meter', 'user', 'resource', 'project', 'source',
                  'sourceassoc']
        sql = "SET foreign_key_checks = 0;"

        for table in tables:
            sql += "ALTER TABLE %s CONVERT TO CHARACTER SET utf8;" % table
        sql += "SET foreign_key_checks = 1;"
        sql += "ALTER DATABASE %s DEFAULT CHARACTER SET utf8;" \
            % migrate_engine.url.database
        migrate_engine.execute(sql)


def downgrade(migrate_engine):
    # Operations to reverse the above upgrade go here.
    if migrate_engine.name == "mysql":
        tables = ['meter', 'user', 'resource', 'project', 'source',
                  'sourceassoc']
        sql = "SET foreign_key_checks = 0;"

        for table in tables:
            sql += "ALTER TABLE %s CONVERT TO CHARACTER SET latin1;" % table
        sql += "SET foreign_key_checks = 1;"
        sql += "ALTER DATABASE %s DEFAULT CHARACTER SET latin1;" \
            % migrate_engine.url.database
        migrate_engine.execute(sql)
