# Copyright 2014
# The Cloudscaling Group, Inc.
#
# 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.

from sqlalchemy import Column, Index, MetaData, PrimaryKeyConstraint
from sqlalchemy import String, Table, Text


def upgrade(migrate_engine):
    meta = MetaData()
    meta.bind = migrate_engine

    items = Table('items', meta,
        Column("id", String(length=255)),
        Column("project_id", String(length=255)),
        Column("kind", String(length=50)),
        Column("name", String(length=63)),
        Column("data", Text()),
        PrimaryKeyConstraint('kind', 'id'),
        Index('items_project_kind_name_idx', 'project_id', 'kind', 'name'),
        mysql_engine="InnoDB",
        mysql_charset="utf8"
    )
    items.create()

    if migrate_engine.name == "mysql":
        # In Folsom we explicitly converted migrate_version to UTF8.
        sql = "ALTER TABLE migrate_version CONVERT TO CHARACTER SET utf8;"
        # Set default DB charset to UTF8.
        sql += "ALTER DATABASE %s DEFAULT CHARACTER SET utf8;" % \
                migrate_engine.url.database
        migrate_engine.execute(sql)


def downgrade(migrate_engine):
    raise NotImplementedError("Downgrade from Icehouse is unsupported.")