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/*
  @author: Ziru Zhu
  @url: http://twitter.com/ziru
  @update: http://userscripts.org/jetpacks/168.js
  @title: 开心网消息提醒
  @description: 检查开心网是否有未读消息
  @version: 0.1

  Based on: http://jetpacks.benji-banned.ch/ by Benjamin Auer
*/

jetpack.future.import("storage.simple");  

var gblLogPrefix = '[Kaixin] ';
function log(msg) {
  console.log(gblLogPrefix + msg);
};

function updateStatusBar(doc, msg) {
  $(doc).find("#count").text(msg);
  log('Update status bar: ' + msg);
};

function KaixinNotifier() {
  jetpack.storage.simple.kaixin_last_count = jetpack.storage.simple.kaixin_last_count || 0;
  this.lastCount = jetpack.storage.simple.kaixin_last_count;
  this.latestCount = this.lastCount;
  log('Initialize kaixin_lastCount = ' + this.lastCount);
};

KaixinNotifier.prototype = {
  open: function() {
    jetpack.tabs.open("http://www.kaixin001.com/msg/");
    jetpack.tabs[jetpack.tabs.length-1].focus();
  },

  notify: function(msg) {
    jetpack.notifications.show({
      title: "开心网",
      body: msg,
      icon: "http://www.kaixin001.com/favicon.ico"
    });
  },

  update: function() {
    log("Start loading the kaixin001 message page");
    var inst = this;
    $.ajax({
      type: "GET",
      url: inst.url,
      dataType: "html",
      async: true,
      success: function(html) {
        log("Message page load onSuccess()");
        if ($(html).find('#body_msg_num')) {
          log("Message page loaded");
          var count = 0;
          count += parseInt($(html).find('#body_msg_num').text().replace(/条新$/,''));
          count += parseInt($(html).find('#body_bbs_num').text().replace(/条新$/,''));
          count += parseInt($(html).find('#body_comment_num').text().replace(/条新$/,''));
          count += parseInt($(html).find('#body_sysmsg_num').text().replace(/条新$/,''));
          count += parseInt($(html).find('#body_bbsreply_num').text().replace(/条新$/,''));
          count += parseInt($(html).find('#body_reply_num').text().replace(/条新$/,''));
          if (count > inst.lastCount) {
            inst.notify('New Messages! ('+(count - inst.lastCount)+')');
          }
          inst.latestCount = count;
          log('kaixin_lastCount = ' + inst.lastCount);
          log("kaixin_latestCount = " + inst.latestCount);
          inst.updateMsg();
        } else {
          console.error("Not logged in");
          inst.updateMsg('Login');
        }
      },
      error: function (XMLHttpRequest, textStatus, errorThrown) {
        inst.updateMsg();
        console.error("Failed to grab web page: " + inst.url + ", status = "  + textStatus);
      }
    });
  },
  
  onclick: function() {
    this.lastCount = this.latestCount;
    jetpack.storage.simple.kaixin_last_count = this.lastCount;
    log('Store kaixin_last_count = ' + this.lastCount);
    this.updateMsg();
    jetpack.tabs.open(this.url);
    jetpack.tabs[ jetpack.tabs.length - 1 ].focus();
  },
  
  updateMsg: function(msg) {
    if (msg)
      this.msg = 'K(' + msg + ')';
    else
      this.msg = 'K(' + this.latestCount + ')';
    log('Update msg to: ' + this.msg);
  },
  
  lastCount: 0,
  latestCount: 0,
  msg: '...',
  url: "http://www.kaixin001.com/msg/"
};

function NotifierManager() {};

NotifierManager.prototype = {
  add: function(notifier) {
    this.notifierSet.push(notifier);
  },

  ping: function() {
    for each (var notifier in this.notifierSet)
      notifier.update();
  },

  updateStatusMsg: function(doc) {
    var finalMsg = '';
    for each (var notifier in this.notifierSet)
      finalMsg += notifier.msg + ' ';
    finalMsg = finalMsg.replace(/^\s*/, '').replace(/\s*$/, '').replace(/\s+/g, ' ');
    updateStatusBar(doc, finalMsg);
  },

  update: function(doc) {
    log('# of notifiers: ' + this.notifierSet.length);
    this.ping();
    this.updateStatusMsg(doc);
    var inst = this;
    setTimeout(function() { inst.updateStatusMsg(doc) }, 5000);
  },
  
  onclick: function(doc) {
    for each (var notifier in this.notifierSet)
      notifier.onclick();
    this.update(doc);
  },
  
  notifierSet: [],
};

function onInit(doc) {
    // ====== Start of jQuery Hack =====
    // Reference: http://groups.google.com/group/mozilla-labs-jetpack/msg/3b22891f2425865f
    // =================================
    //Use jQuery extend to override init in jQuery.fn
    jQuery.fn.extend(jQuery.fn, {
      _init : jQuery.fn.init, //the original init function
      init : function (selector, context) {
        //If context is not specified, let's use jetpack's current document
        return this._init(selector, context ||
  jetpack.tabs.focused.contentDocument);
      }
    });

    //Add jQuery's prototype to the new init function (so we can instantiate object via init() call)
    $.prototype.init.prototype = $.prototype; 
    // ====== End of jQuery Hack =====

    var mgr = new NotifierManager();
    mgr.add(new KaixinNotifier());
    mgr.update(doc);
    setInterval( function() { mgr.update(doc); }, 10 * 60 * 1000 );    // 10 minute
    
    // hook clicks
    $(doc).click(function() { mgr.onclick(doc); });

};

jetpack.statusBar.append({
  html: <>
    <div><span id="count"></span></div>
  </>,
  onReady: function (doc) {
    onInit(doc);
  },
});

// onInit();