/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you 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
 *
 *    https://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.
 */
package org.grails.plugins.databasemigration.command

import grails.dev.commands.ApplicationCommand
import org.grails.plugins.databasemigration.DatabaseMigrationException

class DbmRollbackCommandSpec extends ApplicationContextDatabaseMigrationCommandSpec {

    @Override
    protected Class<ApplicationCommand> getCommandClass() {
        return DbmRollbackCommand
    }

    def setup() {
        command.changeLogFile << CHANGE_LOG_CONTENT

        new DbmUpdateCountCommand(applicationContext: applicationContext).handle(getExecutionContext('1'))
        new DbmTagCommand(applicationContext: applicationContext).handle(getExecutionContext('test-tag'))
        new DbmUpdateCommand(applicationContext: applicationContext).handle(getExecutionContext())

        def tables = sql.rows('SELECT table_name FROM information_schema.tables WHERE table_class = \'org.h2.mvstore.db.MVTable\'').collect { it.table_name.toLowerCase() }
        assert tables as Set == ['book', 'author', 'databasechangeloglock', 'databasechangelog'] as Set
    }

    def "rolls back the database to the state it was in when the tag was applied"() {
        when:
            command.handle(getExecutionContext('test-tag'))

        then:
            def tables = sql.rows('SELECT table_name FROM information_schema.tables WHERE table_class = \'org.h2.mvstore.db.MVTable\'').collect { it.table_name.toLowerCase() }
            tables as Set == ['author', 'databasechangeloglock', 'databasechangelog'] as Set
    }

    def "an error occurs if tagName parameter is not specified"() {
        when:
            command.handle(getExecutionContext())

        then:
            def e = thrown(DatabaseMigrationException)
            e.message == "The ${command.name} command requires a tag"
    }

    static final String CHANGE_LOG_CONTENT = '''
databaseChangeLog = {

    changeSet(author: "John Smith", id: "1") {
        createTable(tableName: "author") {
            column(autoIncrement: "true", name: "id", type: "BIGINT") {
                constraints(primaryKey: "true", primaryKeyName: "authorPK")
            }

            column(name: "version", type: "BIGINT") {
                constraints(nullable: "false")
            }

            column(name: "name", type: "VARCHAR(255)") {
                constraints(nullable: "false")
            }
        }
    }

    changeSet(author: "John Smith", id: "2") {
        createTable(tableName: "book") {
            column(autoIncrement: "true", name: "id", type: "BIGINT") {
                constraints(primaryKey: "true", primaryKeyName: "bookPK")
            }

            column(name: "version", type: "BIGINT") {
                constraints(nullable: "false")
            }

            column(name: "author_id", type: "BIGINT") {
                constraints(nullable: "false")
            }

            column(name: "title", type: "VARCHAR(255)") {
                constraints(nullable: "false")
            }
        }
    }
}
'''
}
