/*
    * Copyright (c) 2002-2026 Gargoyle Software Inc.
    *
    * Licensed 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
    * https://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.htmlunit.html;
  
  import static org.htmlunit.BrowserVersionFeatures.HTMLINPUT_TYPE_MONTH_SUPPORTED;
  import static org.htmlunit.BrowserVersionFeatures.JS_INPUT_CHANGE_TYPE_DROPS_VALUE_WEEK_MONTH;
  
  import java.time.YearMonth;
  import java.time.format.DateTimeFormatter;
  import java.time.format.DateTimeParseException;
  import java.util.Map;
  
  import org.htmlunit.BrowserVersion;
  import org.htmlunit.SgmlPage;
  import org.htmlunit.util.StringUtils;
  
  /**
   * Wrapper for the HTML element "input" where type is "month".
   *
   * @author Ahmed Ashour
   * @author Frank Danek
   * @author Anton Demydenko
   * @author Ronald Brill
   */
  public class HtmlMonthInput extends HtmlInput implements LabelableElement {
  
      private static final DateTimeFormatter FORMATTER_ = DateTimeFormatter.ofPattern("yyyy-MM");
  
      /**
       * Creates an instance.
       *
       * @param qualifiedName the qualified name of the element type to instantiate
       * @param page the page that contains this element
       * @param attributes the initial attributes
       */
      HtmlMonthInput(final String qualifiedName, final SgmlPage page,
              final Map<String, DomAttr> attributes) {
          super(qualifiedName, page, attributes);
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public void setDefaultChecked(final boolean defaultChecked) {
          // Empty.
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public void setValue(final String newValue) {
          try {
              if (hasFeature(HTMLINPUT_TYPE_MONTH_SUPPORTED) && !StringUtils.isEmptyOrNull(newValue)) {
                  FORMATTER_.parse(newValue);
              }
              super.setValue(newValue);
          }
          catch (final DateTimeParseException ignored) {
              // ignore
          }
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public boolean isValid() {
          return super.isValid() && isMaxValid() && isMinValid();
      }
  
      /**
       * Returns if the input element has a valid min value. Refer to the
       * <a href="https://www.w3.org/TR/html5/sec-forms.html">HTML 5</a>
       * documentation for details.
       *
       * @return if the input element has a valid min value
       */
      private boolean isMinValid() {
          if (hasFeature(HTMLINPUT_TYPE_MONTH_SUPPORTED) && !getMin().isEmpty()) {
              try {
                  final YearMonth dateValue = YearMonth.parse(getRawValue(), FORMATTER_);
                  final YearMonth minDate = YearMonth.parse(getMin(), FORMATTER_);
                  return minDate.equals(dateValue) || minDate.isBefore(dateValue);
              }
              catch (final DateTimeParseException ignored) {
                 // ignore
             }
         }
         return true;
     }
 
     /**
      * Returns if the input element has a valid max value. Refer to the
      * <a href="https://www.w3.org/TR/html5/sec-forms.html">HTML 5</a>
      * documentation for details.
      *
      * @return if the input element has a valid max value
      */
     private boolean isMaxValid() {
         if (hasFeature(HTMLINPUT_TYPE_MONTH_SUPPORTED) && !getMax().isEmpty()) {
             try {
                 final YearMonth dateValue = YearMonth.parse(getRawValue(), FORMATTER_);
                 final YearMonth maxDate = YearMonth.parse(getMax(), FORMATTER_);
                 return maxDate.equals(dateValue) || maxDate.isAfter(dateValue);
             }
             catch (final DateTimeParseException ignored) {
                 // ignore
             }
         }
         return true;
     }
 
     @Override
     protected void adjustValueAfterTypeChange(final HtmlInput oldInput, final BrowserVersion browserVersion) {
         if (browserVersion.hasFeature(JS_INPUT_CHANGE_TYPE_DROPS_VALUE_WEEK_MONTH)) {
             setValue("");
             return;
         }
         super.adjustValueAfterTypeChange(oldInput, browserVersion);
     }
 }