/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- /
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */

'use strict';

const Cc = Components.classes;
const Ci = Components.interfaces;
const Cu = Components.utils;

Cu.import('resource://gre/modules/Services.jsm');

function debug(data) {
  dump('browser-helper: ' + data + '\n');
}

function initResponsiveDesign(browserWindow) {
  // Inject custom controls in responsive view
  Cu.import('resource:///modules/devtools/responsivedesign.jsm');
  ResponsiveUIManager.once('on', function(event, {tab:tab}) {
    let responsive = tab.__responsiveUI;
    let document = tab.ownerDocument;

    browserWindow.shell = {
      sendChromeEvent: sendChromeEvent
    };

    // Ensure tweaking only the first responsive mode opened
    responsive.stack.classList.add('os-mode');

    let sleepButton = document.createElement('button');
    sleepButton.id = 'os-sleep-button';
    sleepButton.setAttribute('top', 0);
    sleepButton.setAttribute('right', 0);
    sleepButton.addEventListener('mousedown', function() {
      sendChromeEvent({type: 'sleep-button-press'});
    });
    sleepButton.addEventListener('mouseup', function() {
      sendChromeEvent({type: 'sleep-button-release'});
    });
    responsive.stack.appendChild(sleepButton);

    let volumeButtons = document.createElement('vbox');
    volumeButtons.id = 'os-volume-buttons';
    volumeButtons.setAttribute('top', 0);
    volumeButtons.setAttribute('left', 0);

    let volumeUp = document.createElement('button');
    volumeUp.id = 'os-volume-up-button';
    volumeUp.addEventListener('mousedown', function() {
      sendChromeEvent({type: 'volume-up-button-press'});
    });
    volumeUp.addEventListener('mouseup', function() {
      sendChromeEvent({type: 'volume-up-button-release'});
    });

    let volumeDown = document.createElement('button');
    volumeDown.id = 'os-volume-down-button';
    volumeDown.addEventListener('mousedown', function() {
      sendChromeEvent({type: 'volume-down-button-press'});
    });
    volumeDown.addEventListener('mouseup', function() {
      sendChromeEvent({type: 'volume-down-button-release'});
    });

    volumeButtons.appendChild(volumeUp);
    volumeButtons.appendChild(volumeDown);
    responsive.stack.appendChild(volumeButtons);

    // <toolbar id="os-hardware-button">
    //  <toolbarbutton id="os-home-button" />
    // </toolbar>
    let bottomToolbar = document.createElement('toolbar');
    bottomToolbar.id = 'os-hardware-buttons';
    bottomToolbar.setAttribute('align', 'center');
    bottomToolbar.setAttribute('pack', 'center');

    let homeButton = document.createElement('toolbarbutton');
    homeButton.id = 'os-home-button';
    homeButton.setAttribute('class', 'devtools-toolbarbutton');

    homeButton.addEventListener('mousedown', function() {
      sendChromeEvent({type: 'home-button-press'});
    });
    homeButton.addEventListener('mouseup', function() {
      sendChromeEvent({type: 'home-button-release'});
    });
    bottomToolbar.appendChild(homeButton);
    responsive.container.appendChild(bottomToolbar);

    // Simulate chrome event.
    function sendChromeEvent(detail) {
      let contentWindow = responsive.browser.contentWindow;
      var contentDetail = Components.utils.createObjectIn(contentWindow);
      for (var i in detail) {
        contentDetail[i] = detail[i];
      }
      Components.utils.makeObjectPropsNormal(contentDetail);

      var customEvt = contentWindow.document.createEvent('CustomEvent');
      customEvt.initCustomEvent('mozChromeEvent', true, true, contentDetail);
      contentWindow.dispatchEvent(customEvt);
    }
  });

  // Cleanup responsive mode if it's disabled
  ResponsiveUIManager.on('off', function(event, tab, responsive) {
    if (responsive.stack.classList.contains('os-mode')) {
      responsive.stack.classList.remove('os-mode');
      let document = tab.ownerDocument;
      let sleepButton = document.getElementById('os-sleep-button');
      responsive.stack.removeChild(sleepButton);
      let volumeButtons = document.getElementById('os-volume-buttons');
      responsive.stack.removeChild(volumeButtons);
      let bottomToolbar = document.getElementById('os-hardware-buttons');
      responsive.container.removeChild(bottomToolbar);
    }
  });

  // Automatically toggle responsive design mode
  let mgr = browserWindow.ResponsiveUI.ResponsiveUIManager;
  mgr.handleGcliCommand(browserWindow,
                        browserWindow.gBrowser.selectedTab,
                        'resize on');

  // Enable touch events
  browserWindow.gBrowser.selectedTab.__responsiveUI.enableTouch();
}

function startup(data, reason) {
  try {
    // Initialize various JSM instanciated by shell.js
    // All of them are usefull even if we don't use them in this file.
    Cu.import('resource://gre/modules/ContactService.jsm');
    Cu.import('resource://gre/modules/SettingsRequestManager.jsm');
    Cu.import('resource://gre/modules/ActivitiesService.jsm');

    var mm = Cc['@mozilla.org/globalmessagemanager;1']
               .getService(Ci.nsIMessageBroadcaster);
    // Allow panning to work in the system app.
    mm.loadFrameScript('chrome://global/content/BrowserElementPanning.js', true);

    // Enable mozApps.getAll and app.launch to work.
    // By default on firefox, apps are consider as not launchable
    // and only launchable apps appear in getAll().
    Cu.import('resource://gre/modules/Webapps.jsm');
    DOMApplicationRegistry.allAppsLaunchable = true;

    // Track loading of the system app in order to load our striped down copy
    // of shell.xul
    Services.obs.addObserver(function(document) {
      // Some documents like XBL don't have location and should be ignored
      if (!document.location)
        return;
      let domain = document.location.toString();
      if (domain.indexOf('system.gaiamobile.org') != -1) {
        let scope = {
          content: document.defaultView
        };
        Services.scriptloader.loadSubScript(
          'chrome://browser-helper.js/content/shell.js', scope);
      }
    }, 'document-element-inserted', false);

    // Watch for app load start in firefox tabs.
    // We have to set the app id on each docshell where we are trying to load
    // an app. That's because we can't set mozapp attribute on firefox iframes
    // as Firefox is still using xul:browser.
    let nsIWebProgressListener = Ci.nsIWebProgressListener;
    let appsService = Cc['@mozilla.org/AppsService;1'].getService(Ci.nsIAppsService);
    let docShellListener = {
      onStateChange: function onStateChange(webProgress, request, flags, status) {
        if (!webProgress.chromeEventHandler ||
             webProgress.chromeEventHandler.tagName != "xul:browser") {
          // Only set app id for firefox tab <xul:browser> frames
          return;
        }

        // Catch any load start request
        if (flags & nsIWebProgressListener.STATE_START &&
            flags & nsIWebProgressListener.STATE_IS_DOCUMENT &&
            (request instanceof Ci.nsIChannel || 'URI' in request)) {
          // Try to compute the manifest URL out of document URL
          // We should end up with urls like:
          //   http://system.gaiamobile.org:8080/manifest.webapp
          //   app://system.gaiamobile.org/manifest.webapp
          let manifestURL = 'app://'+ request.URI.host +'/manifest.webapp';
          let manifest = appsService.getAppByManifestURL(manifestURL);
          if (manifest) {
            let app = manifest.QueryInterface(Ci.mozIApplication);
            // test-agent expects its iframes to load apps without any permissions
            // so prevent setting the correct app id to its iframes
            if (!webProgress.DOMWindow || !webProgress.DOMWindow.top ||
                !webProgress.DOMWindow.top.location.host.startsWith("test-agent.gaiamobile.org")) {
              webProgress.QueryInterface(Ci.nsIDocShell).setIsApp(app.localId);
            }
          }
        }
      }
    };

    // Watch for new Firefox top level windows
    Services.obs.addObserver(function(win) {
      win.addEventListener('DOMContentLoaded', function loaded() {
        win.removeEventListener('DOMContentLoaded', loaded);
        if (win.gBrowser) {
          // Listen for loads happening in all browser windows.
          win.gBrowser.addProgressListener(docShellListener);
        }
      });
    }, 'domwindowopened', false);

    Services.obs.addObserver(function() {
      let browserWindow = Services.wm.getMostRecentWindow('navigator:browser');

      // Inject CSS in browser to customize responsive view
      let doc = browserWindow.document;
      let pi = doc.createProcessingInstruction('xml-stylesheet', 'href="chrome://browser-helper.js/content/browser.css" type="text/css"');
      doc.insertBefore(pi, doc.firstChild);

      // Start responsive design mode
      initResponsiveDesign(browserWindow);

      // And devtool panel while maximizing its size according to screen size
      Services.prefs.setIntPref('devtools.toolbox.sidebar.width',
                                browserWindow.outerWidth - 550);
      gDevToolsBrowser.selectToolCommand(browserWindow.gBrowser);

      let KeyboardGlobal = Cu.import('resource://gre/modules/Keyboard.jsm');

      // SystemAppProxy.jsm doesn't ship into Firefox.
      // Keyboard.jsm is the only one user of it outside of b2g/ folder.
      // So hack it, in order to allow keyboard to send events to the system app
      Object.defineProperty(KeyboardGlobal, "SystemAppProxy", {
        value: {
          dispatchEvent: function (detail) {
            let contentWindow = browserWindow.content;
            var contentDetail = Components.utils.createObjectIn(contentWindow);
            for (var i in detail) {
              contentDetail[i] = detail[i];
            }
            Components.utils.makeObjectPropsNormal(contentDetail);

            var customEvt = contentWindow.document.createEvent('CustomEvent');
            customEvt.initCustomEvent('mozChromeEvent', true, true, contentDetail);
            contentWindow.dispatchEvent(customEvt);
          }
        }
      });

      Keyboard.initFormsFrameScript(mm);
      mm.loadFrameScript('chrome://global/content/forms.js', true);
    }, 'sessionstore-windows-restored', false);

    try {
      // Register a new devtool panel with various OS controls
      Cu.import('resource:///modules/devtools/gDevTools.jsm');
      gDevTools.registerTool({
        id: 'firefox-os-controls',
        key: 'F',
        modifiers: 'accel,shift',
        icon: 'chrome://browser-helper.js/content/panel/icon.gif',
        url: 'chrome://browser-helper.js/content/panel/index.html',
        label: 'FFOS Control',
        tooltip: 'Set of controls to tune FirefoxOS apps in Desktop browser',
        isTargetSupported: function(target) {
          return target.isLocalTab;
        },
        build: function(iframeWindow, toolbox) {
          iframeWindow.wrappedJSObject.tab = toolbox.target.window;
          return {
            destroy: function () {}
          };
        }
      });
    } catch(e) {
      debug('Can\'t load the devtools panel. Likely because this version of Gecko is too old');
    }

  } catch (e) {
    debug('Something went wrong while trying to start browser-helper: ' + e);
  }
}

function shutdown(data, reason) {
  // prevent stdout warnings
}

function install(data, reason) {
}

function uninstall(data, reason) {
}