// Copyright 2020-2021 Dave Verwer, Sven A. Schmidt, and other contributors.
//
// 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.

import Fluent
import SQLKit


struct UpdatePackageStatusNew: Migration {
    func prepare(on database: Database) -> EventLoopFuture<Void> {
        guard let db = database as? SQLDatabase else {
            fatalError("Database must be an SQLDatabase ('as? SQLDatabase' must succeed)")
        }
        
        return db.raw("ALTER TABLE packages ALTER COLUMN status SET DEFAULT 'new'").run()
            .flatMap {
                db.raw("ALTER TABLE packages ALTER COLUMN status SET NOT NULL").run()
            }
    }
    
    func revert(on database: Database) -> EventLoopFuture<Void> {
        guard let db = database as? SQLDatabase else {
            fatalError("Database must be an SQLDatabase ('as? SQLDatabase' must succeed)")
        }
        
        return db.raw("ALTER TABLE packages ALTER COLUMN status DROP NOT NULL").run()
            .flatMap {
                db.raw("ALTER TABLE packages ALTER COLUMN status DROP DEFAULT").run()
            }
    }
}
