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/*
 * Copyright 2024 Hazelcast Inc.
 *
 * Licensed under the Hazelcast Community License (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://hazelcast.com/hazelcast-community-license
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.hazelcast.sql.impl;

import com.hazelcast.sql.impl.plan.cache.PlanCacheChecker;
import com.hazelcast.sql.impl.state.QueryClientStateRegistry;
import com.hazelcast.sql.impl.state.QueryResultRegistry;
import com.hazelcast.sql.impl.state.QueryStateRegistryUpdater;

/**
 * Proxy for SQL service.
 */
public class SqlInternalService {

    /** Registry for query results. */
    private final QueryResultRegistry resultRegistry;

    /** Registry for client queries. */
    private final QueryClientStateRegistry clientStateRegistry;

    /** State registry updater. */
    private final QueryStateRegistryUpdater stateRegistryUpdater;

    public SqlInternalService(
            QueryResultRegistry resultRegistry,
            String instanceName,
            NodeServiceProvider nodeServiceProvider,
            long stateCheckFrequency,
            PlanCacheChecker planCacheChecker,
            DataConnectionConsistencyChecker dataConnectionConsistencyChecker) {
        this.resultRegistry = resultRegistry;

        // Create state registries since they do not depend on anything.
        this.clientStateRegistry = new QueryClientStateRegistry();

        // State checker depends on state registries and operation handler.
        this.stateRegistryUpdater = new QueryStateRegistryUpdater(
                instanceName,
                nodeServiceProvider,
                clientStateRegistry,
                planCacheChecker,
                dataConnectionConsistencyChecker,
                stateCheckFrequency
        );
    }

    public void start() {
        stateRegistryUpdater.start();
    }

    public void shutdown() {
        stateRegistryUpdater.shutdown();

        resultRegistry.shutdown();
        clientStateRegistry.shutdown();
    }

    public QueryResultRegistry getResultRegistry() {
        return resultRegistry;
    }

    public QueryClientStateRegistry getClientStateRegistry() {
        return clientStateRegistry;
    }

    /**
     * For testing only.
     */
    public QueryStateRegistryUpdater getStateRegistryUpdater() {
        return stateRegistryUpdater;
    }
}