/*
    * 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.infra.yaml.data.swapper;
  
  import lombok.RequiredArgsConstructor;
  import org.apache.shardingsphere.infra.metadata.statistics.ShardingSphereRowData;
  import org.apache.shardingsphere.infra.metadata.database.schema.model.ShardingSphereColumn;
  import org.apache.shardingsphere.infra.util.yaml.swapper.YamlConfigurationSwapper;
  import org.apache.shardingsphere.infra.yaml.data.pojo.YamlShardingSphereRowData;
  
  import java.math.BigDecimal;
  import java.sql.Types;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.LinkedList;
  import java.util.List;
  
  /**
   * YAML ShardingSphere row data swapper.
   */
  @RequiredArgsConstructor
  public final class YamlShardingSphereRowDataSwapper implements YamlConfigurationSwapper<YamlShardingSphereRowData, ShardingSphereRowData> {
      
      private final List<ShardingSphereColumn> columns;
      
      @Override
      public YamlShardingSphereRowData swapToYamlConfiguration(final ShardingSphereRowData data) {
          YamlShardingSphereRowData result = new YamlShardingSphereRowData();
          Collection<Object> rowData = null == data.getRows() ? Collections.emptyList() : data.getRows();
          List<Object> yamlRowData = new LinkedList<>();
          int count = 0;
          for (Object each : rowData) {
              yamlRowData.add(convertDataType(each, columns.get(count++).getDataType()));
          }
          result.setRows(yamlRowData);
          result.setUniqueKey(data.getUniqueKey());
          return result;
      }
      
      private Object convertDataType(final Object data, final int dataType) {
          if (Types.DECIMAL == dataType || Types.BIGINT == dataType) {
              return null == data ? null : data.toString();
          }
          // TODO use general type convertor
          return data;
      }
      
      @Override
      public ShardingSphereRowData swapToObject(final YamlShardingSphereRowData yamlConfig) {
          Collection<Object> yamlRow = null == yamlConfig.getRows() ? Collections.emptyList() : yamlConfig.getRows();
          List<Object> rowData = new LinkedList<>();
          int count = 0;
          for (Object each : yamlRow) {
              ShardingSphereColumn column = columns.get(count++);
              rowData.add(convertByDataType(each, column.getDataType()));
          }
          return new ShardingSphereRowData(yamlConfig.getUniqueKey(), rowData);
      }
      
      private Object convertByDataType(final Object data, final int dataType) {
          if (null == data) {
              return null;
          }
          if (Types.DECIMAL == dataType) {
              return new BigDecimal(data.toString());
          }
          if (Types.BIGINT == dataType) {
              return Long.valueOf(data.toString());
          }
          if (Types.REAL == dataType || Types.FLOAT == dataType) {
              return Float.parseFloat(data.toString());
          }
          // TODO use general type convertor
          return data;
      }
  }