# Copyright (c) 2011 Citrix Systems, 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 *
from migrate import *

from nova import log as logging


meta = MetaData()
LOG = logging.getLogger(__name__)


# Table stub-definitions
# Just for the ForeignKey and column creation to succeed, these are not the
# actual definitions of instances or services.
#
volumes = Table('volumes', meta,
                Column('id', Integer(), primary_key=True, nullable=False),
                )

#
# New Tables
#
flavors = Table('sm_flavors', meta,
          Column('created_at', DateTime(timezone=False)),
          Column('updated_at', DateTime(timezone=False)),
          Column('deleted_at', DateTime(timezone=False)),
          Column('deleted', Boolean(create_constraint=True, name=None)),
          Column('id', Integer(), primary_key=True, nullable=False),
          Column('label',
                 String(length=255, convert_unicode=False, assert_unicode=None,
                        unicode_error=None, _warn_on_bytestring=False)),
          Column('description',
                 String(length=255, convert_unicode=False, assert_unicode=None,
                        unicode_error=None, _warn_on_bytestring=False)),
          )

backend = Table('sm_backend_config', meta,
          Column('created_at', DateTime(timezone=False)),
          Column('updated_at', DateTime(timezone=False)),
          Column('deleted_at', DateTime(timezone=False)),
          Column('deleted', Boolean(create_constraint=True, name=None)),
          Column('id', Integer(), primary_key=True, nullable=False),
          Column('flavor_id', Integer(), ForeignKey('sm_flavors.id'),
                 nullable=False),
          Column('sr_uuid',
                 String(length=255, convert_unicode=False, assert_unicode=None,
                        unicode_error=None, _warn_on_bytestring=False)),
          Column('sr_type',
                 String(length=255, convert_unicode=False, assert_unicode=None,
                        unicode_error=None, _warn_on_bytestring=False)),
          Column('config_params',
                 String(length=2047,
                        convert_unicode=False,
                        assert_unicode=None,
                        unicode_error=None,
                        _warn_on_bytestring=False)),
          )

sm_vol = Table('sm_volume', meta,
         Column('created_at', DateTime(timezone=False)),
         Column('updated_at', DateTime(timezone=False)),
         Column('deleted_at', DateTime(timezone=False)),
         Column('deleted', Boolean(create_constraint=True, name=None)),
         Column('id', Integer(), ForeignKey('volumes.id'),
                primary_key=True, nullable=False),
         Column('backend_id', Integer(), ForeignKey('sm_backend_config.id'),
                nullable=False),
         Column('vdi_uuid',
                String(length=255, convert_unicode=False, assert_unicode=None,
                        unicode_error=None, _warn_on_bytestring=False)),
         )
#
# Tables to alter
#

# (none currently)


def upgrade(migrate_engine):
    # Upgrade operations go here. Don't create your own engine;
    # bind migrate_engine to your metadata
    meta.bind = migrate_engine
    for table in (flavors, backend, sm_vol):
        try:
            table.create()
        except Exception:
            LOG.info(repr(table))


def downgrade(migrate_engine):
    meta.bind = migrate_engine
    for table in (flavors, backend, sm_vol):
        try:
            table.drop()
        except Exception:
            LOG.info(repr(table))
