/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.iotdb.db.queryengine.plan.execution.config.metadata;

import org.apache.iotdb.common.rpc.thrift.TConsensusGroupId;
import org.apache.iotdb.confignode.rpc.thrift.TGetRegionIdResp;
import org.apache.iotdb.db.queryengine.common.header.ColumnHeader;
import org.apache.iotdb.db.queryengine.common.header.ColumnHeaderConstant;
import org.apache.iotdb.db.queryengine.common.header.DatasetHeader;
import org.apache.iotdb.db.queryengine.common.header.DatasetHeaderFactory;
import org.apache.iotdb.db.queryengine.plan.execution.config.ConfigTaskResult;
import org.apache.iotdb.db.queryengine.plan.execution.config.IConfigTask;
import org.apache.iotdb.db.queryengine.plan.execution.config.executor.IConfigTaskExecutor;
import org.apache.iotdb.db.queryengine.plan.statement.metadata.GetRegionIdStatement;
import org.apache.iotdb.rpc.TSStatusCode;
import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType;
import org.apache.iotdb.tsfile.read.common.block.TsBlockBuilder;

import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.SettableFuture;

import java.util.List;
import java.util.stream.Collectors;

public class GetRegionIdTask implements IConfigTask {

  private final GetRegionIdStatement getRegionIdStatement;

  public GetRegionIdTask(GetRegionIdStatement getRegionStatement) {
    this.getRegionIdStatement = getRegionStatement;
  }

  @Override
  public ListenableFuture<ConfigTaskResult> execute(IConfigTaskExecutor configTaskExecutor) {
    // If the action is executed successfully, return the Future.
    // If your operation is async, you can return the corresponding future directly.
    return configTaskExecutor.getRegionId(getRegionIdStatement);
  }

  public static void buildTsBlock(TsBlockBuilder builder, TConsensusGroupId tConsensusGroupId) {
    builder.getTimeColumnBuilder().writeLong(0L);
    builder.getColumnBuilder(0).writeInt(tConsensusGroupId.getId());
    builder.declarePosition();
  }

  public static void buildTsBlock(
      TGetRegionIdResp getRegionIdResp, SettableFuture<ConfigTaskResult> future) {
    List<TSDataType> outputDataTypes =
        ColumnHeaderConstant.getRegionIdColumnHeaders.stream()
            .map(ColumnHeader::getColumnType)
            .collect(Collectors.toList());
    TsBlockBuilder builder = new TsBlockBuilder(outputDataTypes);

    getRegionIdResp.getDataRegionIdList().forEach(e -> buildTsBlock(builder, e));

    DatasetHeader datasetHeader = DatasetHeaderFactory.getGetRegionIdHeader();
    future.set(new ConfigTaskResult(TSStatusCode.SUCCESS_STATUS, builder.build(), datasetHeader));
  }
}
