/*
    * 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.maven.cli;
  
  import java.io.File;
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Comparator;
  import java.util.List;
  
  import org.apache.commons.cli.Option;
  import org.apache.commons.io.FileUtils;
  import org.junit.jupiter.api.Test;
  
  import static java.util.Objects.nonNull;
  
  /**
   * Pseudo test to generate documentation fragment about supported CLI options. TODO such documentation generation code
   * should not be necessary as unit test but should be run during site generation (Velocity? Doxia macro?)
   */
  class CLIManagerDocumentationTest {
      private static final String LS = System.lineSeparator();
  
      private static class OptionComparator implements Comparator<Option> {
          public int compare(Option opt1, Option opt2) {
              String s1 = opt1.getOpt() != null ? opt1.getOpt() : opt1.getLongOpt();
              String s2 = opt2.getOpt() != null ? opt2.getOpt() : opt2.getLongOpt();
              return s1.compareToIgnoreCase(s2);
          }
      }
  
      private static class CLIManagerExtension extends CLIManager {
          public Collection<Option> getOptions() {
              List<Option> optList = new ArrayList<>(options.getOptions());
              optList.sort(new OptionComparator());
              return optList;
          }
      }
  
      String getOptionsAsHtml() {
          StringBuilder sb = new StringBuilder(512);
          boolean odd = true;
          sb.append(
                  "<table border='1' class='zebra-striped'><tr class='a'><th><b>Options</b></th><th><b>Description</b></th></tr>");
          for (Option option : new CLIManagerExtension().getOptions()) {
              odd = !odd;
              sb.append("<tr class='");
              sb.append(odd ? 'a' : 'b');
              sb.append("'>");
  
              sb.append("<td>");
  
              sb.append("<code>");
  
              if (nonNull(option.getOpt())) {
                  sb.append("-<a name='");
                  sb.append(option.getOpt());
                  sb.append("'>");
                  sb.append(option.getOpt());
                  sb.append("</a>");
              }
  
              if (nonNull(option.getLongOpt())) {
                  if (nonNull(option.getOpt())) {
                      sb.append(", ");
                  }
                  sb.append("--<a name='");
                  sb.append(option.getLongOpt());
                  sb.append("'>");
                  sb.append(option.getLongOpt());
                  sb.append("</a>");
              }
  
              if (option.hasArg()) {
                  if (option.hasArgName()) {
                      sb.append(" &lt;").append(option.getArgName()).append("&gt;");
                  } else {
                      sb.append(' ');
                  }
              }
              sb.append("</code>");
  
             sb.append("</td>");
             sb.append("<td>");
             sb.append(option.getDescription());
             sb.append("</td>");
 
             sb.append("</tr>");
             sb.append(LS);
         }
         sb.append("</table>");
         return sb.toString();
     }
 
     @Test
     void testOptionsAsHtml() throws IOException {
         File options = new File("target/test-classes/options.html");
         FileUtils.write(options, getOptionsAsHtml(), "UTF-8");
     }
 }