const Applet = imports.ui.applet;
const Cinnamon = imports.gi.Cinnamon;
const Lang = imports.lang;
const PopupMenu = imports.ui.popupMenu;
const St = imports.gi.St;
const Main = imports.ui.main;

function MyApplet(metadata, orientation, panel_height, instance_id) {
    this._init(metadata, orientation, panel_height, instance_id);
}

MyApplet.prototype = {
    __proto__: Applet.IconApplet.prototype,

    _init: function(metadata, orientation, panel_height, instance_id) {
        Applet.IconApplet.prototype._init.call(this, orientation, panel_height, instance_id);

        try {
            this.set_applet_icon_symbolic_name("windows-quick-list");
            this.set_applet_tooltip(_("All windows"));
            this._menu = new Applet.AppletPopupMenu(this, orientation);
            this.menuManager = new PopupMenu.PopupMenuManager(this);
            this.menuManager.addMenu(this._menu);
            this.subMenuItemWrapper = new PopupMenu.PopupSubMenuMenuItem(null);
            this.subMenuItemWrapper.actor.set_style_class_name('');
            this.subMenuItemWrapper.menu.actor.set_style_class_name('');
            this.menu = this.subMenuItemWrapper.menu;
            this._menu.addMenuItem(this.subMenuItemWrapper);
        }
        catch (e) {
            global.logError(e);
        }
    },

    updateMenu: function() {
        this.menu.removeAll();
        let empty_menu = true;
        try {
            let tracker = Cinnamon.WindowTracker.get_default();

            for ( let wks=0; wks<global.screen.n_workspaces; ++wks ) {
                // construct a list with all windows
                let workspace_name = Main.getWorkspaceName(wks);
                let metaWorkspace = global.screen.get_workspace_by_index(wks);
                let windows = metaWorkspace.list_windows();
                let sticky_windows = windows.filter(
                        function(w) {
                            return !w.is_skip_taskbar() && w.is_on_all_workspaces();
                            }
                                        );
                windows = windows.filter(
                        function(w) {
                            return !w.is_skip_taskbar() && !w.is_on_all_workspaces();
                            }
                                        );

                windows = windows.filter( Main.isInteresting );

                if(sticky_windows.length && (wks==0)) {
                    for ( let i = 0; i < sticky_windows.length; ++i ) {
                        let metaWindow = sticky_windows[i];
                        let item = new PopupMenu.PopupMenuItem(metaWindow.get_title());
                            item.label.add_style_class_name('window-sticky');
                        item.connect('activate', Lang.bind(this, function() { this.activateWindow(metaWorkspace, metaWindow); } ));
                        item._window = sticky_windows[i];
                        let app = tracker.get_window_app(item._window);
                        item._icon = app.create_icon_texture(24);
                        item.addActor(item._icon, { align: St.Align.END });
                        this.menu.addMenuItem(item);
                        empty_menu = false;
                    }
                        this.menu.addMenuItem(new PopupMenu.PopupSeparatorMenuItem());
                }

                if(windows.length) {
                    if(wks>0) {
                        this.menu.addMenuItem(new PopupMenu.PopupSeparatorMenuItem());
                    }
                    if(global.screen.n_workspaces>1) {
                        let item = new PopupMenu.PopupMenuItem(workspace_name);
                        item.actor.reactive = false;
                        item.actor.can_focus = false;
                        item.label.add_style_class_name('popup-subtitle-menu-item');
                        if(wks == global.screen.get_active_workspace().index()) {
                            item.setShowDot(true);
                        }
                        this.menu.addMenuItem(item);
                        empty_menu = false;
                    }


                    for ( let i = 0; i < windows.length; ++i ) {
                        let metaWindow = windows[i];
                        let item = new PopupMenu.PopupMenuItem(windows[i].get_title());
                        item.connect('activate', Lang.bind(this, function() { this.activateWindow(metaWorkspace, metaWindow); } ));
                        item._window = windows[i];
                        let app = tracker.get_window_app(item._window);
                        item._icon = app.create_icon_texture(24);
                        item.addActor(item._icon, { align: St.Align.END });
                        this.menu.addMenuItem(item);
                        empty_menu = false;
                    }
                }
            }
        } catch(e) {
            global.logError(e);
        }
        if (empty_menu) {
            let item = new PopupMenu.PopupMenuItem(_("No open windows"));
            item.actor.reactive = false;
            item.actor.can_focus = false;
            item.label.add_style_class_name('popup-subtitle-menu-item');
            this.menu.addMenuItem(item);
        }
    },

    activateWindow: function(metaWorkspace, metaWindow) {
        if (this._menu.isOpen) {
            this._menu.toggle();
        }
        this.menu.toggle();
        if(!metaWindow.is_on_all_workspaces()) { metaWorkspace.activate(global.get_current_time()); }
        metaWindow.unminimize();
        metaWindow.activate(global.get_current_time());
    },

    on_applet_clicked: function(event) {
        this.updateMenu();
        if (!this._menu.isOpen) {
            this._menu.toggle();
        }
        this.menu.toggle();
    }
};

function main(metadata, orientation, panel_height, instance_id) {
    let myApplet = new MyApplet(metadata, orientation, panel_height, instance_id);
    return myApplet;
}
