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/*
 * (c) Copyright 2018 Palantir Technologies Inc. All rights reserved.
 *
 * 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.
 */
package com.palantir.atlasdb.keyvalue.cassandra;

import com.palantir.logsafe.Arg;
import java.util.ArrayList;
import java.util.List;
import org.immutables.value.Value;

@Value.Immutable
public abstract class CqlSinglePartitionBatchQuery {
    abstract List individualQueryStatements();

    public static ImmutableCqlSinglePartitionBatchQuery.Builder builder() {
        return ImmutableCqlSinglePartitionBatchQuery.builder();
    }

    @Value.Lazy
    public CqlQuery toCqlQuery() {
        StringBuilder queryFormat = new StringBuilder();
        List> queryArgs = new ArrayList<>();
        queryFormat.append("BEGIN UNLOGGED BATCH\n"); // Safe, because all updates are on the same partition key
        individualQueryStatements().forEach(query -> {
            queryFormat.append(query.safeQueryFormat()).append("\n");
            queryArgs.addAll(query.args());
        });
        queryFormat.append("APPLY BATCH;");

        return CqlQuery.builder()
                .safeQueryFormat(queryFormat.toString())
                .args(queryArgs)
                .build();
    }
}