/*
    * 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.db.protocol.mysql.packet.command.query.text;
  
  import lombok.Getter;
  import lombok.RequiredArgsConstructor;
  import org.apache.shardingsphere.db.protocol.mysql.packet.MySQLPacket;
  import org.apache.shardingsphere.db.protocol.mysql.payload.MySQLPacketPayload;
  import org.apache.shardingsphere.infra.util.datetime.DateTimeFormatterFactory;
  
  import java.math.BigDecimal;
  import java.sql.Timestamp;
  import java.time.LocalDateTime;
  import java.util.ArrayList;
  import java.util.Collection;
  
  /**
   * Text result set row packet for MySQL.
   *
   * @see <a href="https://dev.mysql.com/doc/dev/mysql-server/latest/page_protocol_com_query_response_text_resultset_row.html">Text Resultset Row</a>
   */
  @RequiredArgsConstructor
  @Getter
  public final class MySQLTextResultSetRowPacket extends MySQLPacket {
      
      private static final int NULL = 0xfb;
      
      private final Collection<Object> data;
      
      public MySQLTextResultSetRowPacket(final MySQLPacketPayload payload, final int columnCount) {
          data = new ArrayList<>(columnCount);
          for (int i = 0; i < columnCount; i++) {
              data.add(payload.readStringLenenc());
          }
      }
      
      @Override
      protected void write(final MySQLPacketPayload payload) {
          for (Object each : data) {
              if (null == each) {
                  payload.writeInt1(NULL);
                  continue;
              }
              writeDataIntoPayload(payload, each);
          }
      }
      
      private void writeDataIntoPayload(final MySQLPacketPayload payload, final Object data) {
          if (data instanceof byte[]) {
              payload.writeBytesLenenc((byte[]) data);
          } else if (data instanceof Timestamp && 0 == ((Timestamp) data).getNanos()) {
              payload.writeStringLenenc(data.toString().split("\\.")[0]);
          } else if (data instanceof BigDecimal) {
              payload.writeStringLenenc(((BigDecimal) data).toPlainString());
          } else if (data instanceof Boolean) {
              payload.writeBytesLenenc((boolean) data ? new byte[]{1} : new byte[]{0});
          } else if (data instanceof LocalDateTime) {
              payload.writeStringLenenc(DateTimeFormatterFactory.getStandardFormatter().format((LocalDateTime) data));
          } else {
              payload.writeStringLenenc(data.toString());
          }
      }
  }