/*
    * 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.plugins.changes.trac;
  
  import java.net.MalformedURLException;
  import java.net.URL;
  import java.text.ParseException;
  import java.text.SimpleDateFormat;
  import java.util.ArrayList;
  import java.util.Calendar;
  import java.util.Date;
  import java.util.List;
  import java.util.Locale;
  import java.util.Map;
  
  import org.apache.maven.plugins.changes.issues.Issue;
  import org.apache.maven.project.MavenProject;
  import org.apache.xmlrpc.XmlRpcException;
  import org.apache.xmlrpc.client.XmlRpcClient;
  import org.apache.xmlrpc.client.XmlRpcClientConfigImpl;
  import org.apache.xmlrpc.client.XmlRpcCommonsTransportFactory;
  
  /**
   * Get issues from a Trac installation.
   *
   * @author Dennis Lundberg
   * @version $Id$
   * @since 2.4
   */
  public class TracDownloader {
      /** The Maven project. */
      private MavenProject project;
  
      /** The Trac query for searching for tickets. */
      private String query;
  
      /** The password for authentication into a private Trac installation. */
      private String tracPassword;
  
      /** The username for authentication into a private Trac installation. */
      private String tracUser;
  
      private Issue createIssue(Object[] ticketObj) {
          Issue issue = new Issue();
  
          issue.setId(String.valueOf(ticketObj[0]));
  
          issue.setKey(String.valueOf(ticketObj[0]));
  
          issue.setLink(getUrl() + "/ticket/" + ticketObj[0]);
  
          issue.setCreated(parseDate(String.valueOf(ticketObj[1])));
  
          issue.setUpdated(parseDate(String.valueOf(ticketObj[2])));
  
          @SuppressWarnings("unchecked")
          Map<String, String> attributes = (Map<String, String>) ticketObj[3];
  
          issue.setType(attributes.get("type"));
  
          issue.setSummary(attributes.get("summary"));
  
          issue.setStatus(attributes.get("status"));
  
          issue.setResolution(attributes.get("resolution"));
  
          issue.setAssignee(attributes.get("owner"));
  
          issue.addFixVersion(attributes.get("milestone"));
  
          issue.setPriority(attributes.get("priority"));
  
          issue.setReporter(attributes.get("reporter"));
  
          issue.addComponent(attributes.get("component"));
  
          return issue;
      }
  
      public List<Issue> getIssueList() throws MalformedURLException, XmlRpcException {
          // Create and configure an XML-RPC client
          XmlRpcClientConfigImpl config = new XmlRpcClientConfigImpl();
  
         try {
             config.setServerURL(new URL(getUrl() + "/login/xmlrpc"));
         } catch (MalformedURLException e) {
             throw new MalformedURLException("The Trac URL is incorrect.");
         }
         config.setBasicUserName(tracUser);
         config.setBasicPassword(tracPassword);
 
         XmlRpcClient client = new XmlRpcClient();
 
         client.setConfig(config);
 
         client.setTransportFactory(new XmlRpcCommonsTransportFactory(client));
 
         // Fetch issues
         String qstr = "";
 
         if (!(query == null || query.isEmpty())) {
             qstr = query;
         }
 
         Object[] params = new Object[] {qstr};
         Object[] queryResult;
         ArrayList<Issue> issueList = new ArrayList<>();
         try {
             queryResult = (Object[]) client.execute("ticket.query", params);
 
             for (Object aQueryResult : queryResult) {
                 params = new Object[] {aQueryResult};
                 Object[] ticketGetResult;
                 ticketGetResult = (Object[]) client.execute("ticket.get", params);
                 issueList.add(createIssue(ticketGetResult));
             }
         } catch (XmlRpcException e) {
             throw new XmlRpcException("XmlRpc Error.", e);
         }
         return issueList;
     }
 
     private String getUrl() {
 
         String url = project.getIssueManagement().getUrl();
 
         if (url.endsWith("/")) {
             url = url.substring(0, url.length() - 1);
         }
 
         return url;
     }
 
     public void setProject(MavenProject project) {
         this.project = project;
     }
 
     public void setQuery(String query) {
         this.query = query;
     }
 
     public void setTracPassword(String tracPassword) {
         this.tracPassword = tracPassword;
     }
 
     public void setTracUser(String tracUser) {
         this.tracUser = tracUser;
     }
 
     private Date parseDate(String timeCreated) throws RuntimeException {
         try {
             long millis = Long.parseLong(timeCreated);
             Calendar cld = Calendar.getInstance();
             cld.setTimeInMillis(millis * 1000L);
             return cld.getTime();
         } catch (NumberFormatException e) {
             SimpleDateFormat format = new SimpleDateFormat("EEE MMM dd HH:mm:ss z yyyy", Locale.ENGLISH);
             try {
                 return format.parse(timeCreated);
             } catch (ParseException e1) {
                 throw new RuntimeException("Failed to parse date '" + timeCreated + "' as a date.", e1);
             }
         }
     }
 }