/*
 *  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 java.text.ParseException

import groovy.transform.CompileStatic

import liquibase.Liquibase

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

@CompileStatic
class DbmRollbackToDateSqlCommand implements ApplicationCommand, ApplicationContextDatabaseMigrationCommand {

    final String description = 'Writes SQL to roll back the database to the state it was in at the given date/time to STDOUT or a file'

    @Override
    void handle() {
        def dateStr = args[0]
        if (!dateStr) {
            throw new DatabaseMigrationException('Date must be specified as two strings with the format "yyyy-MM-dd HH:mm:ss" or as one strings with the format "yyyy-MM-dd"')
        }

        String timeStr = null
        String filename = null
        if (args[1]) {
            if (args.size() > 2 || isTimeFormat(args[1])) {
                timeStr = args[1]
            } else {
                filename = args[1]
            }
        }

        def date = null
        try {
            date = parseDateTime(dateStr, timeStr)
        } catch (ParseException e) {
            throw new DatabaseMigrationException("Problem parsing '$dateStr${timeStr ? " $timeStr" : ''}' as a Date: $e.message")
        }

        filename = filename ?: args[2]

        withLiquibase { Liquibase liquibase ->
            withFileOrSystemOutWriter(filename) { Writer writer ->
                liquibase.rollback(date, contexts, writer)
            }
        }
    }
}
