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/*-
 * ========================LICENSE_START=================================
 * smooks-persistence-cartridge
 * %%
 * Copyright (C) 2020 Smooks
 * %%
 * Licensed under the terms of the Apache License Version 2.0, or
 * the GNU Lesser General Public License version 3.0 or later.
 *
 * SPDX-License-Identifier: Apache-2.0 OR LGPL-3.0-or-later
 *
 * ======================================================================
 *
 * 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.
 *
 * ======================================================================
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 * =========================LICENSE_END==================================
 */
package org.smooks.cartridges.persistence.datasource;

import jakarta.transaction.Status;
import jakarta.transaction.UserTransaction;
import org.smooks.assertion.AssertArgument;

import java.sql.Connection;
import java.sql.SQLException;

class JtaTransactionManager implements TransactionManager {

    private final UserTransaction transaction;

    private final Connection connection;

    private boolean newTransaction;

    private final boolean setAutoCommitAllowed;

    /**
     * @param transaction
     * @param connection
     */
    public JtaTransactionManager(Connection connection, UserTransaction transaction, boolean setAutoCommitAllowed) {
        AssertArgument.isNotNull(connection, "connection");
        AssertArgument.isNotNull(transaction, "transaction");

        this.connection = connection;
        this.transaction = transaction;
        this.setAutoCommitAllowed = setAutoCommitAllowed;
    }

    @Override
    public void begin() {
        try {
            newTransaction = transaction.getStatus() == Status.STATUS_NO_TRANSACTION;
            if (newTransaction) {
                transaction.begin();
            }
            if (setAutoCommitAllowed) {
                try {
                    if (connection.getAutoCommit()) {
                        connection.setAutoCommit(false);
                    }
                } catch (SQLException e) {
                    throw new TransactionException("Exception while setting the 'autoCommit' flag on the connection.", e);
                }
            }
        } catch (Exception e) {
            throw new TransactionException("Exception while beginning the exception", e);
        }
    }

    @Override
    public void commit() {
        if (newTransaction) {
            try {
                transaction.commit();
            } catch (Exception e) {
                throw new TransactionException("Exception while committing the transaction.", e);
            }
        }
    }

    @Override
    public void rollback() {
        if (newTransaction) {
            try {
                transaction.rollback();
            } catch (Exception e) {
                throw new TransactionException("Exception while rolling back the transaction.", e);
            }
        } else {
            try {
                transaction.setRollbackOnly();
            } catch (Exception e) {
                throw new TransactionException("Exception while setting the 'rollback only' flag on the transaction.", e);
            }
        }
    }
}