/*
    * Copyright (c) 2002-2025 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.JS_INPUT_NUMBER_ACCEPT_ALL;
  import static org.htmlunit.BrowserVersionFeatures.JS_INPUT_NUMBER_DOT_AT_END_IS_DOUBLE;
  
  import java.math.BigDecimal;
  import java.text.NumberFormat;
  import java.text.ParseException;
  import java.util.Locale;
  import java.util.Map;
  
  import org.apache.commons.lang3.StringUtils;
  import org.htmlunit.SgmlPage;
  
  /**
   * Wrapper for the HTML element "input" with type is "number".
   *
   * @author Ahmed Ashour
   * @author Ronald Brill
   * @author Frank Danek
   * @author Anton Demydenko
   * @author Raik Bieniek
   * @author Michael Lueck
   */
  public class HtmlNumberInput extends HtmlSelectableTextInput implements LabelableElement {
  
      private static final char[] VALID_INT_CHARS = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '-'};
      private static final String VALID_CHARS = "0123456789-+.eE";
  
      /**
       * 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
       */
      HtmlNumberInput(final String qualifiedName, final SgmlPage page,
              final Map<String, DomAttr> attributes) {
          super(qualifiedName, page, attributes);
  
          final String value = getValueAttribute();
          if (!value.isEmpty()) {
              if (!StringUtils.containsOnly(value, VALID_CHARS)) {
                  setRawValue("");
              }
          }
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      protected boolean isSubmittableByEnter() {
          return true;
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public void setDefaultChecked(final boolean defaultChecked) {
          // Empty.
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      protected void doType(final char c, final boolean lastType) {
          if (!hasFeature(JS_INPUT_NUMBER_ACCEPT_ALL)) {
              if (VALID_CHARS.indexOf(c) == -1) {
                  return;
              }
          }
          super.doType(c, lastType);
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public String getValue() {
          final String raw = getRawValue();
  
          if (StringUtils.isBlank(raw)) {
             return "";
         }
 
         if (org.htmlunit.util.StringUtils.equalsChar('-', raw)
                 || org.htmlunit.util.StringUtils.equalsChar('+', raw)) {
             return raw;
         }
 
         try {
             final String lang = getPage().getWebClient().getBrowserVersion().getBrowserLanguage();
             final NumberFormat format = NumberFormat.getInstance(Locale.forLanguageTag(lang));
             format.parse(raw);
 
             return raw.trim();
         }
         catch (final ParseException ignored) {
             // ignore
         }
 
         if (hasFeature(JS_INPUT_NUMBER_ACCEPT_ALL)) {
             return raw;
         }
 
         return "";
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public boolean isValid() {
         if (!super.isValid()) {
             return false;
         }
 
         String rawValue = getRawValue();
         if (StringUtils.isBlank(rawValue)) {
             return true;
         }
 
         if (!hasFeature(JS_INPUT_NUMBER_ACCEPT_ALL)) {
             rawValue = rawValue.replaceAll("\\s", "");
         }
         if (!rawValue.isEmpty()) {
             if (org.htmlunit.util.StringUtils.equalsChar('-', rawValue)
                     || org.htmlunit.util.StringUtils.equalsChar('+', rawValue)) {
                 return false;
             }
 
             // if we have no step, the value has to be an integer
             if (getStep().isEmpty()) {
                 String val = rawValue;
                 final int lastPos = val.length() - 1;
                 if (lastPos >= 0 && val.charAt(lastPos) == '.') {
                     if (hasFeature(JS_INPUT_NUMBER_DOT_AT_END_IS_DOUBLE)) {
                         return false;
                     }
                     val = val.substring(0, lastPos);
                 }
                 if (!StringUtils.containsOnly(val, VALID_INT_CHARS)) {
                     return false;
                 }
             }
 
             final BigDecimal value;
             try {
                 value = new BigDecimal(rawValue);
             }
             catch (final NumberFormatException e) {
                 return false;
             }
 
             if (!getMin().isEmpty()) {
                 try {
                     final BigDecimal min = new BigDecimal(getMin());
                     if (value.compareTo(min) < 0) {
                         return false;
                     }
 
                     if (!getStep().isEmpty()) {
                         try {
                             final BigDecimal step = new BigDecimal(getStep());
                             if (value.subtract(min).abs().remainder(step).doubleValue() > 0.0) {
                                 return false;
                             }
                         }
                         catch (final NumberFormatException ignored) {
                             // ignore
                         }
                     }
                 }
                 catch (final NumberFormatException ignored) {
                     // ignore
                 }
             }
             if (!getMax().isEmpty()) {
                 try {
                     final BigDecimal max = new BigDecimal(getMax());
                     if (value.compareTo(max) > 0) {
                         return false;
                     }
                 }
                 catch (final NumberFormatException ignored) {
                     // ignore
                 }
             }
         }
         return true;
     }
 }