/*
    * 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.myfaces.tobago.renderkit.html;
  
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.Test;
  
  import java.io.IOException;
  import java.lang.reflect.Field;
  import java.nio.charset.StandardCharsets;
  import java.nio.file.Files;
  import java.nio.file.Path;
  import java.nio.file.Paths;
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.List;
  
  public class HtmlElementsUnitTest {
  
    @Test
    public void testNames() throws IllegalAccessException {
      for (final Field field : HtmlElements.class.getFields()) {
  
        final HtmlElements element = (HtmlElements) field.get(null);
        final String value = element.getValue();
        Assertions.assertEquals(
            value,
            element.name().toLowerCase().replaceAll("_", "-"),
            "Check to lower: '" + element + "'");
        Assertions.assertEquals(
            value.toUpperCase().replaceAll("-", "_"),
            element.name(),
            "Check to upper: '" + element + "'");
      }
    }
  
    @Test
    public void testVoid() throws IllegalAccessException {
  
      // list from spec.
      final List<String> voids = Arrays.asList(
          "area", "base", "br", "col", "command", "embed",
          "hr", "img", "input", "keygen", "link", "meta",
          "param", "source", "track", "wbr");
  
      for (final Field field : HtmlElements.class.getFields()) {
        final HtmlElements element = (HtmlElements) field.get(null);
  
        Assertions.assertEquals(voids.contains(element.getValue()), element.isVoid(), "Check void: '" + element + "'");
      }
  
    }
  
    /**
     * This test checks whether every tobago custom element {@link HtmlElements} occurs in the _tobago.scss.
     */
    @Test
    public void testCompareTobagoCustomElement() throws IOException, IllegalAccessException {
  
      Path scssPath = Paths.get("npm/scss/_tobago.scss");
      final String fileContent = new String(Files.readAllBytes(scssPath), StandardCharsets.UTF_8);
  
      final List<HtmlElements> missing = new ArrayList<>();
      for (final Field field : HtmlElements.class.getFields()) {
        final HtmlElements element = (HtmlElements) field.get(null);
        final String tagName = element.getValue();
  
        if (tagName.startsWith("tobago-") && !containsTagName(fileContent, tagName)) {
          missing.add(element);
        }
      }
  
      Assertions.assertTrue(missing.isEmpty(), "These custom elements are missing in _tobago.scss: " + missing);
    }
  
    private boolean containsTagName(final String content, final String tagName) {
      return content.contains(tagName + " ")
          || content.contains(tagName + "{")
          || content.contains(tagName + ",")
          || content.contains(tagName + ":")
          || content.contains(tagName + ".")
          || content.contains(tagName + ">");
   }
 }