# GNU MediaGoblin -- federated, autonomous media hosting
# Copyright (C) 2011 Free Software Foundation, Inc
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.


from mediagoblin.db import migrations
from mediagoblin.db import util as db_util
from mediagoblin.gmg_commands import util as commands_util


def migrate_parser_setup(subparser):
    subparser.add_argument(
        '-cf', '--conf_file', default='mediagoblin.ini',
        help="Config file used to set up environment")


def migrate(args):
    mgoblin_app = commands_util.setup_app(args)

    # Clear old indexes
    print "== Clearing old indexes... =="
    removed_indexes = db_util.remove_deprecated_indexes(mgoblin_app.db)

    for collection, index_name in removed_indexes:
        print "Removed index '%s' in collection '%s'" % (
            index_name, collection)
    
    # Migrate
    print "== Applying migrations... =="
    for model_name in migrations.MIGRATE_CLASSES:
        model = getattr(mgoblin_app.db, model_name)

        if not hasattr(model, 'migration_handler') or not model.collection:
            continue

        migration = model.migration_handler(model)
        migration.migrate_all(collection=model.collection)
            
    # Add new indexes
    print "== Adding new indexes... =="
    new_indexes = db_util.add_new_indexes(mgoblin_app.db)

    for collection, index_name in new_indexes:
        print "Added index '%s' to collection '%s'" % (
            index_name, collection)