/*
    * LICENSE
    *
    * "THE BEER-WARE LICENSE" (Revision 42):
    * "Sven Strittmatter" <ich@weltraumschaf.de> wrote this file.
    * As long as you retain this notice you can do whatever you want with
    * this stuff. If we meet some day, and you think this stuff is worth it,
    * you can buy me a beer in return.
    */
  
  package org.jenkinsci.plugins.darcs.browsers;
  
  import org.jenkinsci.plugins.darcs.DarcsChangeSet;
  
  import java.io.IOException;
  import java.net.URL;
  import java.net.MalformedURLException;
  import java.util.regex.Pattern;
  import javax.servlet.ServletException;
  
  import hudson.Extension;
  import hudson.Util;
  import hudson.model.Descriptor;
  import hudson.scm.RepositoryBrowser;
  import hudson.util.FormValidation;
  
  import net.sf.json.JSONObject;
  
  import org.kohsuke.stapler.DataBoundConstructor;
  import org.kohsuke.stapler.QueryParameter;
  import org.kohsuke.stapler.StaplerRequest;
  
  /**
   *
   * @author Sven Strittmatter <ich@weltraumschaf.de>
   */
  public final class Darcsden extends DarcsRepositoryBrowser {
  
      /**
       * Serial version UID.
       */
      private static final long serialVersionUID = 1L;
  
      public final URL url;
  
      @DataBoundConstructor
      public Darcsden(final URL url) throws MalformedURLException {
          this.url = new URL(Util.removeTrailingSlash(url.toString()));
      }
  
      public URL getChangeSetLink(final DarcsChangeSet changeSet) throws IOException {
          final String hash = changeSet.getHash();
          final String shortHash = hash.substring(0, hash.lastIndexOf('-'));
          final DarcsQueryBuilder query = new DarcsQueryBuilder(DarcsQueryBuilder.SeparatorType.SLASHES);
          query.add("patch")
               .add(shortHash);
  
          return new URL(url + query.toString());
      }
  
      public URL getFileDiffLink(final DarcsChangeSet changeSet, final String file) throws IOException {
          return null;
      }
  
      /**
       * Darcsden repository browser description.
       */
      @Extension
      public static class DescriptorImpl extends Descriptor<RepositoryBrowser<?>> {
  
          private static final Pattern URI_PATTERN = Pattern.compile("http://darcsden.com/.+");
  
          public String getDisplayName() {
              return "Darcsden";
          }
  
          /**
           * Validates the URL given in the config formular.
           *
           * @todo implement check.
           *
           * @param value
           * @return
           * @throws IOException
           * @throws ServletException
           */
          public FormValidation doCheck(@QueryParameter final String value) throws IOException, ServletException {
  
              return (new FormValidation.URLCheck() {
  
                  @Override
                  protected FormValidation check() throws IOException, ServletException {
                      final String uri = Util.fixEmpty(value);
  
                      if (null == uri) { // nothing entered yet
                          return FormValidation.ok();
                      }
  
                      if (!URI_PATTERN.matcher(uri).matches()) {
                         return FormValidation.errorWithMarkup("The URI should look like "
                                 + "<tt>http://darcsden.com/...</tt>!");
                     }
 
                     return FormValidation.ok();
                 }
             }).check();
         }
 
         @Override
         public DarcsWeb newInstance(final StaplerRequest req, final JSONObject formData) throws Descriptor.FormException {
             return req.bindParameters(DarcsWeb.class, "darcsden.darcs.");
         }
     }
 
 }