/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.neo4j.kernel.impl.transaction.log.entry;

import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.neo4j.configuration.GraphDatabaseSettings.DEFAULT_DATABASE_NAME;

import java.nio.file.Path;
import org.junit.jupiter.api.Test;
import org.neo4j.dbms.api.DatabaseManagementService;
import org.neo4j.graphdb.ConstraintViolationException;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.RelationshipType;
import org.neo4j.graphdb.Transaction;
import org.neo4j.io.fs.EphemeralFileSystemAbstraction;
import org.neo4j.test.TestDatabaseManagementServiceBuilder;
import org.neo4j.test.extension.Inject;
import org.neo4j.test.extension.testdirectory.EphemeralTestDirectoryExtension;
import org.neo4j.test.utils.TestDirectory;

@EphemeralTestDirectoryExtension
class TestTxEntries {
    @Inject
    private EphemeralFileSystemAbstraction fs;

    @Inject
    private TestDirectory testDirectory;

    @Test
    void testStartEntryWrittenOnceOnRollback() {
        Path storeDir = testDirectory.homePath();
        DatabaseManagementService managementService = new TestDatabaseManagementServiceBuilder(storeDir)
                .setFileSystem(fs)
                .build();
        final GraphDatabaseService db = managementService.database(DEFAULT_DATABASE_NAME);
        createSomeTransactions(db);
        EphemeralFileSystemAbstraction snapshot = fs.snapshot();
        managementService.shutdown();

        managementService = new TestDatabaseManagementServiceBuilder(storeDir)
                .setFileSystem(snapshot)
                .build();
        managementService.shutdown();
    }

    private static void createSomeTransactions(GraphDatabaseService db) {
        Node node1;
        try (Transaction tx = db.beginTx()) {
            node1 = tx.createNode();
            Node node2 = tx.createNode();
            node1.createRelationshipTo(node2, RelationshipType.withName("relType1"));
            tx.commit();
        }

        try (Transaction tx = db.beginTx()) {
            tx.getNodeById(node1.getId()).delete();
            // Will throw exception, causing the tx to be rolledback.
            // InvalidRecordException coming, node1 has rels
            assertThrows(ConstraintViolationException.class, tx::commit);
        }

        try (Transaction tx = db.beginTx()) {
            tx.getNodeById(node1.getId()).setProperty("foo", "bar");
            tx.commit();
        }
    }
}
