var _ = require("sdk/l10n").get;
const tabs = require("sdk/tabs");
const {viewFor} = require('sdk/view/core');
const {modelFor} = require('sdk/model/core');
const {getBrowserForTab, getTabBrowserForTab, getTabForContentWindow} = require("sdk/tabs/utils");
const {Ci, Cu} = require("chrome");
Cu.import("resource://gre/modules/XPCOMUtils.jsm", this);

var youtubePattern = /https?:\/\/www\.youtube\.com\/watch\?v=(\S+)/;
var ns = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";

var youtubeURLListener = {
  oldURL: null,

  matchURL: function(newURL) {
    if (newURL == this.oldURL) return -1;

    this.oldURL = newURL;
    return newURL.match(youtubePattern);
  },

  QueryInterface: XPCOMUtils.generateQI([Ci.nsIWebProgressListener, Ci.nsISupportsWeakReference]),
    onLocationChange: function(aBrowser, aProgress, aRequest, aURI) {
    var highLevelTab = modelFor(getTabForContentWindow(aProgress.DOMWindow));
    var urlMatch = this.matchURL(highLevelTab.url);
    if (urlMatch != -1) {
      var ytId = urlMatch[1].substring(0,11); //YT doesn't guarantee that IDs will stay 11 char
      var doc = viewFor(highLevelTab.window).document;
      var tabContextMenu = doc.getElementById("tabContextMenu");

      console.log(ytId, highLevelTab.id);

      var sep = doc.createElementNS(ns,"menuseparator");
      var hbox = doc.createElementNS(ns, "hbox");
      hbox.setAttribute("id", "contexttab-controlsBox");
      hbox.setAttribute("height", "24");

      var playButton = doc.createElementNS(ns,"button");
      playButton.setAttribute("id", "contexttab-newtab");
      playButton.setAttribute("label", _("newtab_string"));
      playButton.setAttribute("accesskey", _("newtabaccesskey_string"));
      playButton.setAttribute("oncommand", "BrowserOpenTab();");
      playButton.setAttribute("icon", "./icon-16.png");
      hbox.appendChild(playButton);

      tabContextMenu.insertBefore(sep, tabContextMenu.firstChild);
      tabContextMenu.insertBefore(hbox, tabContextMenu.firstChild);

      highLevelTab.attach({
        contentScriptFile: "./yt-controls.js"
      });
      worker.port.emit("ytId", ytId);
    }
  }
};

let gBrowser = getTabBrowserForTab(viewFor(tabs[0]));
gBrowser.addTabsProgressListener(youtubeURLListener);