/*
    * 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.shardingsphere.driver.executor.batch;
  
  import com.google.common.collect.Lists;
  import lombok.AccessLevel;
  import lombok.EqualsAndHashCode;
  import lombok.Getter;
  import lombok.RequiredArgsConstructor;
  import lombok.ToString;
  import org.apache.shardingsphere.infra.executor.sql.context.ExecutionUnit;
  
  import java.util.Collections;
  import java.util.LinkedHashMap;
  import java.util.LinkedList;
  import java.util.List;
  import java.util.Map;
  
  /**
   * Batch execution unit.
   */
  @RequiredArgsConstructor
  @Getter
  @EqualsAndHashCode(of = "executionUnit")
  @ToString
  public final class BatchExecutionUnit {
      
      private final ExecutionUnit executionUnit;
      
      private final Map<Integer, Integer> jdbcAndActualAddBatchCallTimesMap = new LinkedHashMap<>();
      
      @Getter(AccessLevel.NONE)
      private int actualCallAddBatchTimes;
      
      /**
       * Map times of use JDBC API call addBatch and times of actual call addBatch after route.
       *
       * @param jdbcAddBatchTimes times of use JDBC API call addBatch
       */
      public void mapAddBatchCount(final int jdbcAddBatchTimes) {
          jdbcAndActualAddBatchCallTimesMap.put(jdbcAddBatchTimes, actualCallAddBatchTimes++);
      }
      
      /**
       * Get parameter sets.
       * 
       * @return parameter sets
       */
      public List<List<Object>> getParameterSets() {
          List<List<Object>> result = new LinkedList<>();
          if (executionUnit.getSqlUnit().getParameters().isEmpty() || 0 == actualCallAddBatchTimes) {
              result.add(Collections.emptyList());
          } else {
              result.addAll(Lists.partition(executionUnit.getSqlUnit().getParameters(), executionUnit.getSqlUnit().getParameters().size() / actualCallAddBatchTimes));
          }
          return result;
      }
  }