/*global $, app, me, client*/
"use strict";

var _ = require('underscore');
var Backbone = require('backbone');
Backbone.$ = $;
var async = require('async');
var StanzaIO = require('stanza.io');

var AppState = require('./models/state');
var MeModel = require('./models/me');
var MainView = require('./views/main');
var Router = require('./router');
var Storage = require('./storage');
var xmppEventHandlers = require('./helpers/xmppEventHandlers');
var pushNotifications = require('./helpers/pushNotifications');
var Notify = require('notify.js');
var Desktop = require('./helpers/desktop');
var AppCache = require('./helpers/cache');

module.exports = {
    launch: function () {

        var self = window.app = this;
        var config = localStorage.config;

        if (!config) {
            console.log('missing config');
            window.location = '/login';
            return;
        }

        config = JSON.parse(config);
        config.useStreamManagement = true;

        _.extend(this, Backbone.Events);

        var profile = {};
        async.series([
            function (cb) {
                app.notifications = new Notify();
                app.desktop = new Desktop();
                app.cache = new AppCache();
                app.storage = new Storage();
                app.storage.open(cb);
                app.mucInfos = [];
            },
            function (cb) {
                app.storage.profiles.get(config.jid, function (err, res) {
                    if (res) {
                        profile = res;
                        profile.jid = {full: config.jid, bare: config.jid};
                        config.rosterVer = res.rosterVer;
                    }
                    cb();
                });
            },
            function (cb) {
                app.state = new AppState();
                app.me = window.me = new MeModel(profile);

                window.onbeforeunload = function () {
                    if (app.api.sessionStarted) {
                        app.api.disconnect();
                    }
                };

                self.api = window.client = StanzaIO.createClient(config);
                client.use(pushNotifications);
                xmppEventHandlers(self.api, self);

                self.api.once('session:started', function () {
                    app.state.hasConnected = true;
                    cb();
                });
                self.api.connect();
            },
            function (cb) {
                function start() {
                    // start our router and show the appropriate page
                    app.history.start({pushState: true, root: '/'});
                    if (app.history.fragment == '' && SERVER_CONFIG.startup)
                        app.navigate(SERVER_CONFIG.startup);
                    cb();
                }

                new Router();
                app.history = Backbone.history;

                self.view = new MainView({
                    model: app.state,
                    el: document.body
                });
                self.view.render();

                if (me.contacts.length) {
                    start();
                } else {
                    me.contacts.once('loaded', start);
                }
            }
        ]);
    },
    whenConnected: function (func) {
        if (app.api.sessionStarted) {
            func();
        } else {
            app.api.once('session:started', func);
        }
    },
    navigate: function (page) {
        var url = (page.charAt(0) === '/') ? page.slice(1) : page;
        app.state.markActive();
        app.history.navigate(url, true);
    },
    renderPage: function (view, animation) {
        var container = $('#pages');

        if (app.currentPage) {
            app.currentPage.hide(animation);
        }
        // we call render, but if animation is none, we want to tell the view
        // to start with the active class already before appending to DOM.
        container.append(view.render(animation === 'none').el);
        view.show(animation);
    },
    serverConfig: function () {
        return SERVER_CONFIG;
    }
};

$(function () {
    module.exports.launch();
});