/*
    * 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.postgresql.packet.command.query.extended.bind.protocol.text.impl;
  
  import org.apache.shardingsphere.db.protocol.postgresql.packet.command.query.extended.bind.protocol.text.PostgreSQLTextValueParser;
  import org.apache.shardingsphere.infra.exception.core.external.sql.type.wrapper.SQLWrapperException;
  import org.postgresql.jdbc.TimestampUtils;
  
  import java.sql.SQLException;
  import java.sql.Timestamp;
  import java.time.LocalDateTime;
  import java.time.format.DateTimeFormatter;
  import java.time.format.DateTimeParseException;
  
  /**
   * Timestamp value parser of PostgreSQL.
   */
  public final class PostgreSQLTimestampValueParser implements PostgreSQLTextValueParser<Timestamp> {
      
      private static final DateTimeFormatter POSTGRESQL_DATE_TIME_FORMATTER = DateTimeFormatter.ofPattern(
              "[yyyy-MM-dd][yyyy_MM_dd][yyyyMMdd][yyyy-M-d][MM/dd/yy][yyMMdd]"
                      + "['T'][ ]"
                      + "[HH:mm:ss][HHmmss][HH:mm][HHmm]"
                      + "[.SSSSSSSSS][.SSSSSSSS][.SSSSSSS][.SSSSSS][.SSSSS][.SSSS][.SSS][.SS][.S]"
                      + "[ ]"
                      + "[XXXXX][XXXX][XXX][XX][X]");
      
      @Override
      public Timestamp parse(final String value) {
          try {
              return Timestamp.valueOf(LocalDateTime.from(POSTGRESQL_DATE_TIME_FORMATTER.parse(value)));
          } catch (final DateTimeParseException ignored) {
              return fallbackToPostgreSQLTimestampUtils(value);
          }
      }
      
      private static Timestamp fallbackToPostgreSQLTimestampUtils(final String value) {
          try {
              return new TimestampUtils(false, null).toTimestamp(null, value);
          } catch (final SQLException ex) {
              throw new SQLWrapperException(ex);
          }
      }
  }