/*
    * CSVeed (https://github.com/42BV/CSVeed)
    *
    * Copyright 2013-2023 CSVeed.
    *
    * All rights reserved. This program and the accompanying materials
    * are made available under the terms of The Apache Software License,
    * Version 2.0 which accompanies this distribution, and is available at
    * https://www.apache.org/licenses/LICENSE-2.0.txt
   */
  package org.csveed.bean.conversion;
  
  import static org.csveed.bean.conversion.ConversionUtil.hasText;
  
  import java.text.DateFormat;
  import java.text.ParseException;
  import java.text.SimpleDateFormat;
  import java.util.Date;
  
  /**
   * The Class DateConverter.
   */
  public class DateConverter extends AbstractConverter<Date> {
  
      /** The date format. */
      private final DateFormat dateFormat;
  
      /** The allow empty. */
      private final boolean allowEmpty;
  
      /** The exact date length. */
      private final int exactDateLength;
  
      /** The format text. */
      private final String formatText;
  
      /**
       * Instantiates a new date converter.
       *
       * @param formatText
       *            the format text
       * @param allowEmpty
       *            the allow empty
       */
      public DateConverter(String formatText, boolean allowEmpty) {
          super(Date.class);
          this.formatText = formatText;
          this.dateFormat = new SimpleDateFormat(formatText);
          this.dateFormat.setLenient(false);
          this.allowEmpty = allowEmpty;
          this.exactDateLength = -1;
      }
  
      @Override
      public Date fromString(String text) throws Exception {
          if (this.allowEmpty && !hasText(text)) {
              return null;
          }
          if (text != null && this.exactDateLength >= 0 && text.length() != this.exactDateLength) {
              throw new IllegalArgumentException(
                      "Could not parse date: it is not exactly" + this.exactDateLength + "characters long");
          }
          try {
              return this.dateFormat.parse(text);
          } catch (ParseException ex) {
              throw new IllegalArgumentException("Could not parse date: " + ex.getMessage(), ex);
          }
      }
  
      @Override
      public String infoOnType() {
          return super.infoOnType() + " " + formatText;
      }
  
      @Override
      public String toString(Date value) {
          return value != null ? this.dateFormat.format(value) : "";
      }
  
  }