/*
 * 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.api;

import java.util.Optional;
import java.util.concurrent.atomic.AtomicReference;
import org.neo4j.kernel.api.QueryRegistry;
import org.neo4j.kernel.api.query.ExecutingQuery;
import org.neo4j.lock.LockTracer;
import org.neo4j.resources.CpuClock;
import org.neo4j.time.SystemNanoClock;
import org.neo4j.values.virtual.MapValue;

public class StatementQueryRegistry implements QueryRegistry {
    private final QueryStatement statement;
    private final ExecutingQueryFactory factory;

    public StatementQueryRegistry(
            QueryStatement statement,
            SystemNanoClock clock,
            AtomicReference<CpuClock> cpuClockRef,
            LockTracer systemLockTracer) {
        this.statement = statement;
        this.factory = new ExecutingQueryFactory(clock, cpuClockRef, systemLockTracer);
    }

    @Override
    public Optional<ExecutingQuery> executingQuery() {
        return statement.executingQuery();
    }

    @Override
    public ExecutingQuery startAndBindExecutingQuery(String queryText, MapValue queryParameters) {
        ExecutingQuery executingQuery = factory.createForStatement(statement, queryText, queryParameters);
        statement.startQueryExecution(executingQuery);
        return executingQuery;
    }

    @Override
    public void bindExecutingQuery(ExecutingQuery executingQuery) {
        ExecutingQueryFactory.bindToStatement(executingQuery, statement);
        statement.startQueryExecution(executingQuery);
    }

    @Override
    public void unbindExecutingQuery(ExecutingQuery executingQuery, long userTransactionId) {
        ExecutingQueryFactory.unbindFromTransaction(executingQuery, userTransactionId);
        statement.stopQueryExecution(executingQuery);
    }

    @Override
    public void beforeUnbindExecutingQuery(ExecutingQuery executingQuery, long userTransactionId) {
        ExecutingQueryFactory.beforeUnbindFromTransaction(executingQuery, userTransactionId);
    }
}
