text: #    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 Boolean, Column, DateTime, ForeignKey
  from sqlalchemy import Integer, MetaData, String, Table, Text
  
  
  def define_tables(meta):
  
      services = Table(
          'services', meta,
          Column('created_at', DateTime),
          Column('updated_at', DateTime),
          Column('deleted_at', DateTime),
          Column('deleted', Boolean),
          Column('id', Integer, primary_key=True, nullable=False),
          Column('host', String(length=255)),
          Column('binary', String(length=255)),
          Column('topic', String(length=255)),
          Column('report_count', Integer, nullable=False),
          Column('disabled', Boolean),
          Column('disabled_reason', String(length=255)),
          Column('modified_at', DateTime),
          Column('rpc_current_version', String(36)),
          Column('rpc_available_version', String(36)),
          mysql_engine='InnoDB'
      )
  
      plans = Table(
          'plans', meta,
          Column('created_at', DateTime),
          Column('updated_at', DateTime),
          Column('deleted_at', DateTime),
          Column('deleted', Boolean),
          Column('id', String(36), primary_key=True, nullable=False),
          Column('name', String(length=255)),
          Column('description', String(length=255)),
          Column('provider_id', String(length=36)),
          Column('project_id', String(length=255)),
          Column('status', String(length=64)),
          Column('parameters', Text),
          mysql_engine='InnoDB'
      )
  
      resources = Table(
          'resources', meta,
          Column('created_at', DateTime),
          Column('updated_at', DateTime),
          Column('deleted_at', DateTime),
          Column('deleted', Boolean),
          Column('id', Integer, primary_key=True, nullable=False),
          Column('plan_id', String(length=36), ForeignKey('plans.id'),
                 nullable=False),
          Column('resource_id', String(length=36)),
          Column('resource_type', String(length=64)),
          Column('resource_name', String(length=255)),
          Column('resource_extra_info', Text),
          mysql_engine='InnoDB'
      )
  
      restores = Table(
          'restores', meta,
          Column('created_at', DateTime),
          Column('updated_at', DateTime),
          Column('deleted_at', DateTime),
          Column('deleted', Boolean),
          Column('id', String(36), primary_key=True, nullable=False),
          Column('project_id', String(length=255)),
          Column('provider_id', String(length=36)),
          Column('checkpoint_id', String(length=36)),
          Column('restore_target', String(length=255)),
          Column('parameters', String(length=255)),
          Column('status', String(length=64)),
          Column('resources_status', Text),
          Column('resources_reason', Text),
          mysql_engine='InnoDB'
      )
  
      operation_logs = Table(
          'operation_logs', meta,
          Column('created_at', DateTime),
          Column('updated_at', DateTime),
          Column('deleted_at', DateTime),
          Column('deleted', Boolean, nullable=False),
          Column('id', String(length=36), primary_key=True, nullable=False),
          Column('project_id', String(length=255), nullable=False),
          Column('scheduled_operation_id', String(length=36)),
          Column('started_at', DateTime),
          Column('ended_at', DateTime),
          Column('state', String(length=64)),
          Column('error', String(length=255)),
          Column('entries', Text),
          mysql_engine='InnoDB'
      )
  
      triggers = Table(
          'triggers', meta,
          Column('created_at', DateTime),
          Column('updated_at', DateTime),
          Column('deleted_at', DateTime),
          Column('deleted', Boolean, nullable=False),
          Column('id', String(length=36), primary_key=True, nullable=False),
          Column('name', String(length=255), nullable=False),
          Column('project_id', String(length=255), nullable=False),
          Column('type', String(length=64), nullable=False),
          Column('properties', Text, nullable=False),
          mysql_engine='InnoDB'
      )
  
      scheduled_operations = Table(
          'scheduled_operations', meta,
          Column('created_at', DateTime),
          Column('updated_at', DateTime),
          Column('deleted_at', DateTime),
          Column('deleted', Boolean, nullable=False),
          Column('id', String(length=36), primary_key=True, nullable=False),
          Column('name', String(length=255), nullable=False),
          Column('description', String(length=255)),
          Column('operation_type', String(length=64), nullable=False),
          Column('user_id', String(length=64), nullable=False),
          Column('project_id', String(length=255), nullable=False),
          Column('trigger_id', String(length=36), ForeignKey('triggers.id'),
                 index=True, nullable=False),
          Column('operation_definition', Text, nullable=False),
          Column('enabled', Boolean, nullable=False, default=True),
          mysql_engine='InnoDB'
      )
  
      scheduled_operation_states = Table(
          'scheduled_operation_states',
          meta,
          Column('created_at', DateTime),
          Column('updated_at', DateTime),
          Column('deleted_at', DateTime),
          Column('deleted', Boolean, nullable=False),
          Column('id', Integer, primary_key=True, nullable=False,
                 autoincrement=True),
          Column('operation_id', String(length=36),
                 ForeignKey('scheduled_operations.id', ondelete='CASCADE'),
                 index=True, unique=True, nullable=False),
          Column('service_id', Integer, ForeignKey('services.id'),
                 nullable=False),
          Column('trust_id', String(length=64), nullable=False),
          Column('state', String(length=32), nullable=False),
          Column('end_time_for_run', DateTime),
          mysql_engine='InnoDB'
      )
  
      scheduled_operation_logs = Table(
          'scheduled_operation_logs',
          meta,
          Column('created_at', DateTime),
          Column('updated_at', DateTime),
          Column('deleted_at', DateTime),
          Column('deleted', Boolean, nullable=False),
          Column('id', Integer, primary_key=True, nullable=False,
                 autoincrement=True),
          Column('operation_id', String(length=36),
                 ForeignKey('scheduled_operations.id', ondelete='CASCADE'),
                 index=True, nullable=False),
          Column('expect_start_time', DateTime),
          Column('triggered_time', DateTime),
          Column('actual_start_time', DateTime),
          Column('end_time', DateTime),
          Column('state', String(length=32), nullable=False),
          Column('extend_info', Text),
          mysql_engine='InnoDB'
      )
  
      checkpoint_records = Table(
          'checkpoint_records',
          meta,
          Column('created_at', DateTime),
          Column('updated_at', DateTime),
          Column('deleted_at', DateTime),
          Column('deleted', Boolean, nullable=False),
          Column('id', String(length=36), primary_key=True, nullable=False),
          Column('project_id', String(length=36), nullable=False),
          Column('checkpoint_id', String(length=36), nullable=False),
          Column('checkpoint_status', String(length=36), nullable=False),
          Column('provider_id', String(length=36), nullable=False),
          Column('plan_id', String(length=36), nullable=False),
          Column('operation_id', String(length=36)),
          Column('create_by', String(length=36)),
          Column('extend_info', Text),
          mysql_engine='InnoDB'
      )
  
      return [services,
              plans,
              resources,
              restores,
              operation_logs,
              triggers,
              scheduled_operations,
              scheduled_operation_states,
              scheduled_operation_logs,
              checkpoint_records]
  
  
  def upgrade(migrate_engine):
      meta = MetaData()
      meta.bind = migrate_engine
  
      # create all tables
      # Take care on create order for those with FK dependencies
      tables = define_tables(meta)
  
      for table in tables:
          table.create()
  
      if migrate_engine.name == "mysql":
          table_names = [t.description for t in tables]
          table_names.append("migrate_version")
  
          migrate_engine.execute("SET foreign_key_checks = 0")
          for table in table_names:
              migrate_engine.execute(
                  "ALTER TABLE %s CONVERT TO CHARACTER SET utf8" % table)
          migrate_engine.execute("SET foreign_key_checks = 1")
          migrate_engine.execute(
              "ALTER DATABASE %s DEFAULT CHARACTER SET utf8" %
              migrate_engine.url.database)
          migrate_engine.execute("ALTER TABLE %s Engine=InnoDB" % table)
  
  
  def downgrade(migrate_engine):
      meta = MetaData()
      meta.bind = migrate_engine
      tables = define_tables(meta)
      tables.reverse()
      for table in tables:
          table.drop()
  