/**

  * 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=Tweeters.class, array = true),

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

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

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

     @Property(name="currentTweets", type=Tweet.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 {

     }

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

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

         @Property(name = "from_user_id", type = int.class),

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

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

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

     })

     static final class Twt {

         @ComputedProperty static String html(String text) {

             StringBuilder sb = new StringBuilder(320);

             for (int pos = 0;;) {

                 int http = text.indexOf("http", pos);

                 if (http == -1) {

                     sb.append(text.substring(pos));

                     return sb.toString();

                 }

                 int spc = text.indexOf(' ', http);

                 if (spc == -1) {

                     spc = text.length();

                 }

                 sb.append(text.substring(pos, http));

                 String url = text.substring(http, spc);

                 sb.append("<a href='").append(url).append("'>").append(url).append("</a>");

                 pos = spc;

             }

         }

         @ComputedProperty static String userUrl(String from_user) {

             return "http://twitter.com/" + from_user;

         }

     }

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

         @Property(array = true, name = "results", type = Twt.class)

     })

     public static final class TwttrQr {

     }

     @OnReceive(url="{root}/search.json?{query}&callback={me}", jsonp="me")

     static void queryTweets(TwitterModel page, TwitterQuery q) {

         page.getCurrentTweets().clear();

         page.getCurrentTweets().addAll(q.getResults());

     }

     @OnPropertyChange("activeTweetersName")

     static void changeTweetersList(TwitterModel model) {

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

         model.getActiveTweeters().clear();

         model.getActiveTweeters().addAll(people.getUserNames());

     }

     @OnPropertyChange({ "activeTweeters", "activeTweetersCount" })

     static void refreshTweets(TwitterModel model) {

         StringBuilder sb = new StringBuilder();

         sb.append("rpp=25&q=");

         String sep = "";

         for (String p : model.getActiveTweeters()) {

             sb.append(sep);

             sb.append("from:");

             sb.append(p);

             sep = " OR ";

         }

         if (!sep.isEmpty()) {

             model.queryTweets("http://search.twitter.com", sb.toString());

         }

     }

     static {

         final TwitterModel model = new TwitterModel();

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

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

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

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

         svdLst.add(newTweeters("NetBeans", "GeertjanW","monacotoni", "NetBeans", "petrjiricka"));

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

         model.setActiveTweetersName("NetBeans");

         model.applyBindings();

     }

     @ComputedProperty

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

         Tweeters tw = findByName(savedLists, activeTweetersName);

         if (activeTweeters == null) {

             return false;

         }

         return !tw.getUserNames().equals(activeTweeters);

     }

     @ComputedProperty

     static int activeTweetersCount(List<String> activeTweeters) {

         return activeTweeters.size();

     }

     @ComputedProperty

     static boolean userNameToAddIsValid(

         String userNameToAdd, String activeTweetersName, List<Tweeters> savedLists, List<String> activeTweeters

     ) {

         return userNameToAdd != null && 

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

             !activeTweeters.contains(userNameToAdd);

     }

     @OnFunction

     static void deleteList(TwitterModel model) {

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

         sl.remove(findByName(sl, model.getActiveTweetersName()));

         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);

         if (indx != -1) {

             t.setName(model.getActiveTweetersName());

             t.getUserNames().clear();

             t.getUserNames().addAll(model.getActiveTweeters());

         }

     }

     @OnFunction

     static void addUser(TwitterModel model) {

         String n = model.getUserNameToAdd();

         model.getActiveTweeters().add(n);

     }

     @OnFunction

     static void removeUser(String data, TwitterModel model) {

         model.getActiveTweeters().remove(data);

     }

     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() ? new Tweeters() : list.get(0);

     }

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

         Tweeters t = new Tweeters();

         t.setName(listName);

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

         return t;

     }

 }