/*
 * 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
 *
 *     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.
 */

package sql

import (
	"github.com/seata/seata-go/pkg/datasource/sql/undo"

	"github.com/pkg/errors"
)

// ATTx
type ATTx struct {
	tx *Tx
}

// Commit do commit action
// case 1. no open global-transaction, just do local transaction commit
// case 2. not need flush undolog, is XA mode, do local transaction commit
// case 3. need run AT transaction
func (tx *ATTx) Commit() error {
	tx.tx.beforeCommit()
	return tx.commitOnAT()
}

func (tx *ATTx) Rollback() error {
	err := tx.tx.Rollback()
	if err != nil {

		originTx := tx.tx

		if originTx.tranCtx.OpenGlobalTransaction() && originTx.tranCtx.IsBranchRegistered() {
			originTx.report(false)
		}
	}

	return err
}

// commitOnAT
func (tx *ATTx) commitOnAT() error {
	originTx := tx.tx

	if err := originTx.register(originTx.tranCtx); err != nil {
		return err
	}

	undoLogMgr, err := undo.GetUndoLogManager(originTx.tranCtx.DBType)
	if err != nil {
		return err
	}

	if err = undoLogMgr.FlushUndoLog(originTx.tranCtx, originTx.conn.targetConn); err != nil {
		if rerr := originTx.report(false); rerr != nil {
			return errors.WithStack(rerr)
		}
		return errors.WithStack(err)
	}

	if err := originTx.commitOnLocal(); err != nil {
		if rerr := originTx.report(false); rerr != nil {
			return errors.WithStack(rerr)
		}
		return errors.WithStack(err)
	}

	originTx.report(true)
	return nil
}