/**

  * Back 2 Browser Bytecode Translator

  * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>

  *

  * This program is free software: you can redistribute it and/or modify

  * it under the terms of the GNU General Public License as published by

  * the Free Software Foundation, version 2 of the License.

  *

  * This program is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  * GNU General Public License for more details.

  *

  * You should have received a copy of the GNU General Public License

  * along with this program. Look for COPYING file in the top folder.

  * If not, see http://opensource.org/licenses/GPL-2.0.

  */

 package org.apidesign.bck2brwsr.demo.twitter;

 import java.util.Arrays;

 import java.util.List;

 import org.apidesign.bck2brwsr.htmlpage.api.*;

 import org.apidesign.bck2brwsr.htmlpage.api.Page;

 import org.apidesign.bck2brwsr.htmlpage.api.Property;

 import org.apidesign.bck2brwsr.htmlpage.api.ComputedProperty;

 /** Controller class for access to Twitter.

  * 

  * @author Jaroslav Tulach

  */

 @Page(xhtml="index.html", className="TwitterModel", properties={

     @Property(name="savedLists", type=TwitterClient.Twttrs.class, array = true),

     @Property(name="activeTweetersName", type=String.class),

     @Property(name="modifiedList", type=TwitterClient.Twttrs.class),

     @Property(name="userNameToAdd", type=String.class),

     @Property(name="currentTweets", type=String.class, array = true)

 })

 public class TwitterClient {

     @Model(className = "Tweeters", properties = {

         @Property(name="name", type = String.class),

         @Property(name="userNames", type = String.class, array = true)

     })

     static class Twttrs {

     }

     private static Tweeters tweeters(String listName, String... userNames) {

         Tweeters t = new Tweeters();

         t.setName(listName);

         t.getUserNames().addAll(Arrays.asList(userNames));

         return t;

     }

     static {

         final TwitterModel model = new TwitterModel();

         final List<Tweeters> svdLst = model.getSavedLists();

         svdLst.add(tweeters("API Design", "JaroslavTulach"));

         svdLst.add(tweeters("Celebrities", "JohnCleese", "MCHammer", "StephenFry", "algore", "StevenSanderson"));

         svdLst.add(tweeters("Microsoft people", "BillGates", "shanselman", "ScottGu"));

         svdLst.add(tweeters("NetBeans", "GeertjanW","monacotoni", "NetBeans"));

         svdLst.add(tweeters("Tech pundits", "Scobleizer", "LeoLaporte", "techcrunch", "BoingBoing", "timoreilly", "codinghorror"));

         model.setActiveTweetersName("NetBeans");

         model.applyBindings();

     }

     @ComputedProperty

     static Tweeters activeTweeters(String activeTweetersName, List<Tweeters> savedLists, Tweeters modifiedList) {

         if (modifiedList != null && modifiedList.getName() != null) {

             if (modifiedList.getName().equals(activeTweetersName)) {

                 return modifiedList;

             } else {

                 modifiedList.setName(null);

             }

         }

         return findByName(savedLists, activeTweetersName);

     }

     @ComputedProperty

     static boolean hasUnsavedChanges(Tweeters modifiedList) {

         return modifiedList != null;

     }

     @ComputedProperty

     static boolean userNameToAddIsValid(String userNameToAdd, String activeTweetersName, List<Tweeters> savedLists, Tweeters modifiedList) {

         Tweeters editingList = activeTweeters(activeTweetersName, savedLists, modifiedList);

         return editingList != null && userNameToAdd != null && 

             userNameToAdd.matches("[a-zA-Z0-9_]{1,15}") &&

             !editingList.getUserNames().contains(userNameToAdd);

     }

     @OnFunction

     static void deleteList(TwitterModel model) {

         final List<Tweeters> sl = model.getSavedLists();

         sl.remove(model.getActiveTweeters());

         if (sl.isEmpty()) {

             final Tweeters t = new Tweeters();

             t.setName("New");

             sl.add(t);

         }

         model.setActiveTweetersName(sl.get(0).getName());

     }

     @OnFunction

     static void saveChanges(TwitterModel model) {

         Tweeters t = findByName(model.getSavedLists(), model.getActiveTweetersName());

         int indx = model.getSavedLists().indexOf(t);

         assert indx != -1;

         model.getSavedLists().set(indx, model.getModifiedList());

         model.setModifiedList(null);

     }

     @OnFunction

     static void addUser(TwitterModel model) {

         String n = model.getUserNameToAdd();

         findModifiedList(model).getUserNames().add(n);

     }

     @OnFunction

     static void removeUser(String data, TwitterModel model) {

         findModifiedList(model).getUserNames().remove(data);

     }

     private static Tweeters findModifiedList(TwitterModel model) {

         if (model.getModifiedList() == null || model.getModifiedList().getName() == null) {

             model.setModifiedList(model.getActiveTweeters().clone());

         }

         return model.getModifiedList();

     }

     private static Tweeters findByName(List<Tweeters> list, String name) {

         for (Tweeters l : list) {

             if (l.getName() != null && l.getName().equals(name)) {

                 return l;

             }

         }

         return list.isEmpty() ? null : list.get(0);

     }

 }