Synnefo

;(function(root){

    // root

    var root = root;

    // setup namepsaces

    var snf = root.synnefo = root.synnefo || {};

    var models = snf.models = snf.models || {}

    var storage = snf.storage = snf.storage || {};

    var ui = snf.ui = snf.ui || {};

    var views = snf.views = snf.views || {}

    // shortcuts

    var bb = root.Backbone;

    var util = snf.util;

    // TODO: implement me

    views.NoticeView = views.Overlay.extend({});

    views.MultipleActionsView = views.View.extend({

        view_id: "multiple_actions",

        _actions: {},

        el: '#multiple_actions_container',

        initialize: function() {

            this.actions = {};

            views.MultipleActionsView.__super__.initialize.call(this);

            // view elements

            this.confirm_actions = this.$(".confirm_multiple_actions");

            this.confirm_actions_yes = this.$(".confirm_multiple_actions button.yes");

            this.confirm_actions_no = this.$(".confirm_multiple_actions button.no");

            this.confirm_reboot = this.$(".confirm_reboot_required");

            this.confirm_reboot_yes = this.$(".confirm_reboot_required button.yes");

            this.confirm_reboot_no = this.$(".confirm_reboot_required button.no");

            this.confirm_reboot_list = this.confirm_reboot.find(".reboot-machines-list");

            this.init_handlers();

            this.update_layout();

            // for heavy resize/scroll window events

            // do it `like a boss` 

            this.fix_position = _.throttle(this.fix_position, 100);

            this.update_layout = _.throttle(this.update_layout, 100);

            this.show_limit = 1;

        },

        init_handlers: function() {

            var self = this;

            $(window).resize(_.bind(function(){

                this.fix_position();

            }, this));

            $(window).scroll(_.bind(function(){

                this.fix_position();

            }, this));

            // confirm/cancel button handlers

            var self = this;

            this.confirm_actions_yes.click(function(){ self.do_all(); })

            this.confirm_actions_no.click(function(){

                self.reset_actions();

            });

            this.confirm_reboot_yes.click(function(){ self.do_reboot_all(); })

            this.confirm_reboot_no.click(function(){

                self.reset_reboots();

            });

            storage.vms.bind("change:pending_action", _.bind(this.handle_vm_change, this));

            storage.vms.bind("change:reboot_required", _.bind(this.handle_vm_change, this));

        },

        handle_vm_change: function(vm) {

            if (vm.has_pending_action()) {

                var action = vm.get("pending_action");

                this.add_action(vm, action);

            } else {

                this.remove_action(vm);

            }

            this.update_layout();

        },

        add_action: function(vm, action) {

            this._actions[vm.id] = {'vm': vm, 'action': action};

        },

        remove_action: function(vm) {

            delete this._actions[vm.id];

        },

        reset: function() {

            this._actions = {};

            this.update_layout();

        },

        reboot_vm: function(vm) {

            vm.call("reboot");

        },

        do_reboot_all: function() {

            _.each(storage.vms.get_reboot_required(), function(vm){

                this.reboot_vm(vm)

            }, this)  

        },

        do_all: function() {

            _.each(this._actions, function(action){

                action.vm.call(action.action);

            }, this)  

            this.reset_actions();

        },

        reset_reboots: function () {

            _.each(storage.vms.get_reboot_required(), function(vm) {vm.set({'reboot_required': false})}, this);

            this.update_layout();

        },

        reset_actions: function() {

            _.each(this._actions, _.bind(function(action){

                try {

                    action.vm.clear_pending_action();

                    this.remove_action(action.vm);

                } catch(err) {

                    console.error("vm " + action.vm.id + " failed to reset", err);

                }

            }, this))  

        },

        fix_position: function() {

            $('.confirm_multiple').removeClass('fixed');

            if (($(this.el).offset().top +$(this.el).height())> ($(window).scrollTop() + $(window).height())) {

                $('.confirm_multiple').addClass('fixed');

            }

        },

        check_notify_limit: function() {

            this.show_limit = 1;

            if (ui.main.current_view && ['networks', 'vm_list'].indexOf(ui.main.current_view.view_id) > -1) {

                this.show_limit = 0;

            }

        },

        update_reboot_required_list: function(vms) {

            this.confirm_reboot_list.empty();

        },

        update_reboot_required: function() {

            var vms = storage.vms.get_reboot_required();

            if (vms.length) {

                this.confirm_reboot.find(".actionLen").text(vms.length);

                this.update_reboot_required_list();

                this.confirm_reboot.show();

                $(this.el).show();

            } else {

                if (!this.actions_visible) {

                   $(this.el).hide();

                }

                this.confirm_reboot.hide();

            }

        },

        update_layout: function() {

            this.check_notify_limit();

            this.actions_visible = false;

            if (_.size(this._actions) > this.show_limit) {

                this.actions_visible = true;

                $(this.el).show();

                this.confirm_actions.show();

            } else {

                $(this.el).hide();

                this.confirm_actions.hide();

            }

            this.update_reboot_required();

            this.confirm_actions.find(".actionLen").text(_.size(this._actions));

            $(window).trigger("resize");

        }

    })

    // menu wrapper view

    views.SelectView = views.View.extend({

        initialize: function(view) {

            this.parent = view;

            this.pane_view_selector = $(".css-tabs");

            this.machine_view_selector = $("#view-select");

            this.el = $(".css-tabs");

            this.title = $(".tab-name");

            this.set_handlers();

            this.update_layout();

            views.SelectView.__super__.initialize.apply(this, arguments);

        },

        clear_active: function() {

            this.pane_view_selector.find("a").removeClass("active");

            this.machine_view_selector.find("a").removeClass("activelink");

        },

        // intercept menu links

        set_handlers: function() {

            var self = this;

            this.pane_view_selector.find("a").hover(function(){

                // FIXME: title from href ? omg

                self.title.text($(this).attr("href"));

            }, function(){

                self.title.text(self.parent.get_title());

            });

            this.pane_view_selector.find("a#machines_view_link").click(_.bind(function(ev){

                ev.preventDefault();

                this.parent.show_view("machines");

            }, this))

            this.pane_view_selector.find("a#networks_view_link").click(_.bind(function(ev){

                ev.preventDefault();

                this.parent.show_view("networks");

            }, this))

            this.pane_view_selector.find("a#disks_view_link").click(_.bind(function(ev){

                ev.preventDefault();

                this.parent.show_view("disks");

            }, this))

            this.machine_view_selector.find("a#machines_view_icon_link").click(_.bind(function(ev){

                ev.preventDefault();

                var d = $.now();

                this.parent.show_view("icon");

            }, this))

            this.machine_view_selector.find("a#machines_view_list_link").click(_.bind(function(ev){

                ev.preventDefault();

                this.parent.show_view("list");

            }, this))

            this.machine_view_selector.find("a#machines_view_single_link").click(_.bind(function(ev){

                ev.preventDefault();

                this.parent.show_view("single");

            }, this))

        },

        update_layout: function() {

            this.clear_active();

            var pane_index = this.parent.pane_ids[this.parent.current_view_id];

            $(this.pane_view_selector.find("a")).removeClass("active");

            $(this.pane_view_selector.find("a").get(pane_index)).addClass("active");

            if (this.parent.current_view && this.parent.current_view.vms_view) {

                if (storage.vms.length > 0) {

                    this.machine_view_selector.show();

                    var machine_index = this.parent.views_ids[this.parent.current_view_id];

                    $(this.machine_view_selector.find("a").get(machine_index)).addClass("activelink");

                } else {

                    this.machine_view_selector.hide();

                }

            } else {

                this.machine_view_selector.hide();

            }

        }

    });

    views.MainView = views.View.extend({

        el: 'body',

        view_id: 'main',

        // FIXME: titles belong to SelectView

        views_titles: {

            'icon': 'machines', 'single': 'machines', 

            'list': 'machines', 'networks': 'networks',

            'disks': 'disks'

        },

        // indexes registry

        views_indexes: {0: 'icon', 2:'single', 1: 'list', 3:'networks'},

        views_pane_indexes: {0:'single', 1:'networks', 2:'disks'},

        // views classes registry

        views_classes: {'icon': views.IconView, 'single': views.SingleView, 

            'list': views.ListView, 'networks': views.NetworksView},

        // view ids

        views_ids: {'icon':0, 'single':2, 'list':1, 'networks':3},

        // on which pane id each view exists

        // machine views (icon,single,list) are all on first pane

        pane_ids: {'icon':0, 'single':0, 'list':0, 'networks':1, 'disks':2},

        initialize: function(show_view) {

            if (!show_view) { show_view = 'icon' };

            // fallback to browser error reporting (true for debug)

            this.skip_errors = true

            // reset views

            this.views = {};

            this.el = $("#app");

            // reset main view status

            this._loaded = false;

            this.status = "Initializing...";

            // initialize handlers

            this.init_handlers();

            // identify initial view from user cookies

            // this view will be visible after loading of

            // main view

            this.initial_view = this.session_view();

            views.MainView.__super__.initialize.call(this);

        },

        vms_handlers_registered: false,

        // register event handlers

        // 

        // vms storage events to identify if vms list 

        // is empty and display empty view if user viewing

        // a machine view

        //

        // api/ui error event handlers

        init_handlers: function() {

            // vm handlers

            storage.vms.bind("remove", _.bind(this.check_empty, this));

            storage.vms.bind("add", _.bind(this.check_empty, this));

            storage.vms.bind("change", _.bind(this.check_empty, this));

            storage.vms.bind("reset", _.bind(this.check_empty, this));

            // api calls handlers

            synnefo.api.bind("error", _.bind(this.handle_api_error, this));

            synnefo.api.bind("change:error_state", _.bind(this.handle_api_error_state, this));

            synnefo.ui.bind("error", _.bind(this.handle_ui_error, this));

        },

        handle_api_error_state: function(state) {

            if (snf.api.error_state === snf.api.STATES.ERROR) {

                this.stop_intervals();

            } else {

                if (this.intervals_stopped) {

                    this.update_intervals();

                }

            }

        },

        handle_api_error: function(args) {

            if (arguments.length == 1) { arguments = _.toArray(arguments[0])};

            if (!_.last(arguments).display) {

                return;

            }

            this.error_state = true;

            var xhr = arguments[0];

            var args = util.parse_api_error.apply(util, arguments);

            // force logout if UNAUTHORIZED request arrives

            if (args.code == 401) { snf.ui.logout(); return };

            var error_entry = [args.ns, args.code, args.message, args.type, args.details, args];

            this.error_view.show_error.apply(this.error_view, error_entry);

        },

        handle_ui_error: function(error) {

            error = error + "<br /><br />" + snf.util.stacktrace().replace("at", "<br /><br />at");

            this.error_view.show_error("Application", -1, "Something went wrong", "JS Exception", error);

        },

        init_overlays: function() {

            this.create_vm_view = new views.CreateVMView();

            //this.notice_view = new views.NoticeView();

        },

        show_loading_view: function() {

            $("#container #content").hide();

            $("#loading-view").show();

        },

        hide_loading_view: function() {

            $("#container #content").show();

            $("#loading-view").hide();

            $(".css-panes").show();

        },

        items_to_load: 4,

        completed_items: 0,

        check_status: function(loaded) {

            this.completed_items++;

            // images, flavors loaded

            if (this.completed_items == 2) {

                this.load_nets_and_vms();

            }

            if (this.completed_items == this.items_to_load) {

                this.after_load();

            }

        },

        load_nets_and_vms: function() {

            var self = this;

            this.update_status("Loading vms...");

            storage.vms.fetch({refresh:true, update:false, success: function(){

                self.update_status("VMS Loaded.");

                self.check_status();

            }});

            this.update_status("Loading networks...");

            storage.networks.fetch({refresh:true, update:false, success: function(){

                self.update_status("Networks loaded.");

                self.check_status();

            }});

        },  

        init_intervals: function() {

            this._networks = storage.networks.get_fetcher(snf.config.update_interval, 

                                                          snf.config.update_interval - 100, 

                                                          1, true, undefined);

            this._vms = storage.vms.get_fetcher(snf.config.update_interval, 

                                                snf.config.update_interval - 100, 

                                                1, true, undefined);

        },

        stop_intervals: function() {

            if (this._networks) { this._networks.stop(); }

            if (this._vms) { this._vms.stop(); }

            this.intervals_stopped = true;

        },

        update_intervals: function() {

            if (this._networks) {

                this._networks.stop();

                this._networks.start();

            } else {

                this.init_intervals();

            }

            if (this._vms) {

                this._vms.stop();

                this._vms.start();

            } else {

                this.init_intervals();

            }

            this.intervals_stopped = false;

        },

        after_load: function() {

            this.update_status("Setting vms update interval...");

            this.init_intervals();

            this.update_intervals();

            this.update_status("Loaded");

            // FIXME: refactor needed

            // initialize views

            this.initialize_views()

            this.update_status("Initializing overlays...");

            this.init_overlays();

            // display initial view

            this.loaded = true;

            this.show_initial_view();

            this.check_empty();

        },

        load: function() {

            this.error_view = new views.ErrorView();

            var self = this;

            // initialize overlay views

            // display loading message

            this.show_loading_view();

            // sync load initial data

            this.update_status("Loading images...");

            storage.images.fetch({refresh:true, update:false, success: function(){

                self.check_status()

            }});

            this.update_status("Loading flavors...");

            storage.flavors.fetch({refresh:true, update:false, success:function(){

                self.check_status()

            }});

        },

        update_status: function(msg) {

            this.log.debug(msg)

            this.status = msg;

            $("#loading-view .info").removeClass("hidden")

            $("#loading-view .info").text(this.status);

        },

        initialize_views: function() {

            this.empty_view = new views.EmptyView();

            this.select_view = new views.SelectView(this);

            this.metadata_view = new views.MetadataView();

            this.multiple_actions_view = new views.MultipleActionsView();

            this.feedback_view = new views.FeedbackView();

            this.add_view("icon");

            this.add_view("list");

            this.add_view("single");

            this.add_view("networks");

            this.init_menu();

        },

        init_menu: function() {

            $(".usermenu .feedback").click(_.bind(function(){

                this.feedback_view.show();

            }, this));

        },

        // initial view based on user cookie

        show_initial_view: function() {

          this.set_vm_view_handlers();

          this.hide_loading_view();

          this.show_view(this.initial_view);

          this.trigger("initial");

        },

        show_vm_details: function(vm) {

            snf.ui.main.show_view("single")

            snf.ui.main.current_view.show_vm(vm);

        },

        set_vm_view_handlers: function() {

            $("#createcontainer #create").click(_.bind(function(){

                this.create_vm_view.show();

            }, this))

        },

        check_empty: function() {

            if (!this.loaded) { return }

            if (storage.vms.length == 0) {

                this.show_view("machines");

                this.show_empty();

            } else {

                this.hide_empty();

            }

            this.select_view.update_layout();

        },

        show_empty: function() {

            $("#machines-pane-top").addClass("empty");

            this.$(".panes").hide();

            this.$("#machines-pane").show();

            this.hide_views([]);

            this.empty_view.show();

        },

        hide_empty: function() {

            $("#machines-pane-top").removeClass("empty");

            this.empty_view = new views.EmptyView();

            this.empty_view.hide();

            if (this.current_view && !this.current_view.visible()) { 

                this.current_view.show(); 

            }

        },

        get_title: function(view_id) {

            var view_id = view_id || this.current_view_id;

            return this.views_titles[view_id];

        },

        // return class object for the given view or false if

        // the view is not registered

        get_class_for_view: function (view_id) {

            if (!this.views_classes[view_id]) {

                return false;

            }

            return this.views_classes[view_id];

        },

        view: function(view_id) {

            return this.views[view_id];

        },

        add_view: function(view_id) {

            if (!this.views[view_id]) {

                var cls = this.get_class_for_view(view_id);

                if (this.skip_errors) {

                    this.views[view_id] = new cls();

                    $(this.views[view_id]).bind("resize", _.bind(function() {

                        window.positionFooter();

                        this.multiple_actions_view.fix_position();

                    }, this));

                } else {

                    // catch ui errors

                    try {

                        this.views[view_id] = new cls();

                        $(this.views[view_id]).bind("resize", _.bind(function() {

                            window.positionFooter();

                            this.multiple_actions_view.fix_position();

                        }, this));

                    } catch (err) {snf.ui.trigger("error", err)}

                }

            } else {

            }

            if (this.views[view_id].vms_view) {

                this.views[view_id].metadata_view = this.metadata_view;

            }

            return this.views[view_id];

        },

        hide_views: function(skip) {

            _.each(this.views, function(view) {

                if (skip.indexOf(view) === -1) {

                    $(view.el).hide();

                }

            }, this)

        },

        get: function(view_id) {

            return this.views[view_id];

        },

        session_view: function() {

            if (this.pane_view_from_session() > 0) {

                return this.views_pane_indexes[this.pane_view_from_session()];

            } else {

                return this.views_indexes[this.machine_view_from_session()];

            }

        },

        pane_view_from_session: function() {

            return $.cookie("pane_view") || 0;

        },

        machine_view_from_session: function() {

            return $.cookie("machine_view") || 0;

        },

        update_session: function() {

            $.cookie("pane_view", this.pane_ids[this.current_view_id]);

            if (this.current_view.vms_view) {

                $.cookie("machine_view", this.views_ids[this.current_view_id]);

            }

        },

        identify_view: function(view_id) {

            // machines view_id is an alias to

            // one of the 3 machines view

            // identify which one (if no cookie set defaults to icon)

            if (view_id == "machines") {

                var index = this.machine_view_from_session();

                view_id = this.views_indexes[index];

            }

            return view_id;

        },

        // switch to current view pane

        // if differs from the visible one

        show_view_pane: function() {

            if (this.current_view.pane != this.current_pane) {

                $(this.current_view.pane).show();

                $(this.current_pane).hide();

                this.current_pane = this.current_view.pane;

            }

        },

        show_view: function(view_id) {

            // same view, visible

            // get out of here asap

            if (this.current_view && 

                this.current_view.id == view_id && 

                this.current_view.visible()) {

                return;

            }

            // choose proper view_id

            view_id = this.identify_view(view_id);

            // add/create view and update current view

            var view = this.add_view(view_id);

            // set current view

            this.current_view = view;

            this.current_view_id = view_id;

            // hide all other views

            this.hide_views([this.current_view]);

            // FIXME: depricated

            $(".large-spinner").remove();

            storage.vms.reset_pending_actions();

            storage.vms.stop_stats_update();

            // show current view

            this.show_view_pane();

            view.show();

            // update menus

            if (this.select_view) {

                this.select_view.update_layout();

            }

            this.current_view.__update_layout();

            // update cookies

            this.update_session();

            // machines view subnav

            if (this.current_view.vms_view) {

                $("#machines-pane").show();

            } else {

                $("#machines-pane").hide();

            }

            // fix footer position

            // TODO: move footer handlers in

            // main view (from home.html)

            if (window.positionFooter) {

                window.positionFooter();

            }

            // trigger view change event

            this.trigger("view:change", this.current_view.view_id);

            $(window).trigger("view:change");

            return view;

        },

        reset_vm_actions: function() {

        },

        // identify current view

        // based on views element visibility

        current_view_id: function() {

            var found = false;

            _.each(this.views, function(key, value) {

                if (value.visible()) {

                    found = value;

                }

            })

            return found;

        }

    });

    snf.ui.main = new views.MainView();

    snf.ui.logout = function() {

        $.cookie("X-Auth-Token", null);

        if (window.LOGOUT_REDIRECT !== undefined)

        {

            window.location = window.LOGOUT_REDIRECT;

        } else {

            window.location.reload();

        }

    }

    snf.ui.init = function() {

        snf.ui.main.load();

    }

})(this);