module VORLON {
    declare var $: any;
    declare var vorlonBaseURL: string;
    
    export class DashboardManager {
        static CatalogUrl: string;
        static vorlonBaseURL: string;
        static ListenClientid: string;
        static DisplayingClient: boolean;
        static ListenClientDisplayid: string;
        static SessionId: string;
        static ClientList: any;
        static PluginsLoaded: boolean;
        static NoWindowMode: boolean;
        
        constructor(sessionid: string, listenClientid: string) {
            //Dashboard session id
            DashboardManager.SessionId = sessionid;
            DashboardManager.PluginsLoaded = false;
            DashboardManager.DisplayingClient = false;
            DashboardManager.vorlonBaseURL = vorlonBaseURL;
            //Client ID
            DashboardManager.ListenClientid = listenClientid;
            DashboardManager.ClientList = {};
            DashboardManager.StartListeningServer()
            DashboardManager.GetClients();
            DashboardManager.CatalogUrl =  vorlonBaseURL + "/getplugins/" + sessionid;
        }
        
        public static StartListeningServer(clientid: string = ""): void{
            var getUrl = window.location;
            var baseUrl = getUrl.protocol + "//" + getUrl.host;
            
            if(DashboardManager.vorlonBaseURL) {
                baseUrl = DashboardManager.vorlonBaseURL.split('//')[0] === getUrl.protocol ? DashboardManager.vorlonBaseURL : baseUrl + DashboardManager.vorlonBaseURL;
            }

            VORLON.Core.StopListening(); 
            VORLON.Core.StartDashboardSide(baseUrl, DashboardManager.SessionId, clientid, DashboardManager.divMapper);
                if(!VORLON.Core.Messenger.onAddClient && !VORLON.Core.Messenger.onAddClient){
                VORLON.Core.Messenger.onAddClient = DashboardManager.addClient;
                VORLON.Core.Messenger.onRemoveClient = DashboardManager.removeClient;
            }
            
            if(clientid !== ""){
                DashboardManager.DisplayingClient = true;
            }
            else {
                DashboardManager.DisplayingClient = false;
            }
        }
        
        public static GetClients(): void {
            let xhr = new XMLHttpRequest();

            xhr.onreadystatechange = () => {
                if (xhr.readyState === 4) {
                    if (xhr.status === 200) {
                        //Init ClientList Object
                        DashboardManager.ClientList = {};                        

                        //Loading client list 
                        var clients = JSON.parse(xhr.responseText);

                        //Test if the client to display is in the list
                        var contains = false;
                        if (clients && clients.length) {
                            for (var j = 0; j < clients.length; j++) {
                                if (clients[j].clientid === DashboardManager.ListenClientid) {
                                    contains = true;
                                    break;
                                }
                            }
                        }
                        
                        if (!contains) {
                            DashboardManager.ListenClientid = "";
                        }
                        
                        //Get the client list placeholder
                        var divClientsListPane = <HTMLDivElement> document.getElementById("clientsListPaneContent");
                        
                        //Create the new empty list
                        var clientlist = document.createElement("ul");
                        clientlist.setAttribute("id", "clientsListPaneContentList")
                        divClientsListPane.appendChild(clientlist);
                                               
                        //Show waiting logo 
                        if(!contains || clients.length === 0){
                            DashboardManager.DisplayWaitingLogo(false);
                        }
                        
                        for (var i = 0; i < clients.length; i++) {
                            var client = clients[i];
                            DashboardManager.AddClientToList(client);
                        }
                        
                        if (contains) {
                             DashboardManager.loadPlugins();
                        }
                    }
                }
            }
            
            xhr.open("GET", vorlonBaseURL + "/api/getclients/" + DashboardManager.SessionId);
            xhr.send();
        }
        
        public static AddClientToList(client: any){
           var clientlist = <HTMLUListElement> document.getElementById("clientsListPaneContentList");
            
            if (!DashboardManager.ListenClientid) {
                DashboardManager.ListenClientid = client.clientid;
            }

            var pluginlistelement = document.createElement("li");
            pluginlistelement.classList.add('client');
            pluginlistelement.id = client.clientid;
            if (client.clientid === DashboardManager.ListenClientid) {
                pluginlistelement.classList.add('active');
            }
            
            var clients = clientlist.children;
            
            //remove ghosts ones
            for (var i = 0; i < clients.length; i++) {
                var currentClient = <HTMLElement>(clients[i]);
                if(DashboardManager.ClientList[currentClient.id].displayid === client.displayid){
                    clientlist.removeChild(currentClient);  
                    i--;
                }
            }
            
            if(clients.length === 0 || DashboardManager.ClientList[(<HTMLElement>clients[clients.length - 1]).id].displayid < client.displayid){
                clientlist.appendChild(pluginlistelement);
            }
            else if(clients.length === 1){
                var firstClient = <HTMLElement>clients[clients.length - 1];
                clientlist.insertBefore(pluginlistelement, firstClient);
            }
            else{
                for (var i = 0; i < clients.length - 1; i++) {
                    var currentClient = <HTMLElement>(clients[i]);
                    var nextClient = <HTMLElement>(clients[i+1]);
                    if(DashboardManager.ClientList[currentClient.id].displayid < client.displayid
                    &&  DashboardManager.ClientList[nextClient.id].displayid >= client.displayid){
                        clientlist.insertBefore(pluginlistelement, nextClient);
                        break;
                    }
                    else if(i === 0){
                        clientlist.insertBefore(pluginlistelement, currentClient);
                    }
                }
            }
            
            var pluginlistelementa = document.createElement("a");
            pluginlistelementa.innerHTML = " <img src='" + DashboardManager.vorlonBaseURL + "/images/systems/"+client.icon+"' alt='icon_system'> " + (client.identity ? client.identity : client.name) + " - " + client.displayid;
            pluginlistelementa.setAttribute("href", vorlonBaseURL + "/dashboard/" + DashboardManager.SessionId + "/" + client.clientid);
            pluginlistelement.appendChild(pluginlistelementa);

            DashboardManager.ClientList[client.clientid] = client;
        } 
        
        static ClientCount(): number{
            return Object.keys(DashboardManager.ClientList).length;
        }

        static UpdateClientInfo(): void {
            document.querySelector('[data-hook~=session-id]').textContent = DashboardManager.SessionId;
            
            if(DashboardManager.ClientList[DashboardManager.ListenClientid] != null){
                DashboardManager.ListenClientDisplayid = DashboardManager.ClientList[DashboardManager.ListenClientid].displayid;
                DashboardManager.NoWindowMode = DashboardManager.ClientList[DashboardManager.ListenClientid].noWindow;
            }
            
            document.querySelector('[data-hook~=client-id]').textContent = DashboardManager.ListenClientDisplayid;
        }
        
        static HideWaitingLogo(): void {
            //Stop bouncing and hide waiting page
            var elt = <HTMLElement>document.querySelector('.dashboard-plugins-overlay');
            VORLON.Tools.AddClass(elt, 'hidden');
            
            elt = <HTMLElement>document.querySelector('.waitLoader');
            VORLON.Tools.AddClass(elt, 'hidden');
            
            elt = document.getElementById('reload');
            VORLON.Tools.RemoveClass(elt, 'hidden');
        }

        static DisplayWaitingLogo(displayWaiter: boolean): void{
            //Hide waiting page and let's not bounce the logo !
            var elt = <HTMLElement>document.querySelector('.dashboard-plugins-overlay');
            if(elt) {
                VORLON.Tools.RemoveClass(elt, 'hidden');
                if (displayWaiter) {
                    elt = <HTMLElement>document.querySelector('.waitLoader');
                    VORLON.Tools.RemoveClass(elt, 'hidden');
                }
                elt = document.getElementById('reload');
                VORLON.Tools.AddClass(elt, 'hidden');
            }
        }

        public static loadPlugins(): void {
            if(DashboardManager.ListenClientid === ""){
                return;
            }
                
            if(this.PluginsLoaded){
                DashboardManager.StartListeningServer(DashboardManager.ListenClientid);
                return;
            }
            
            let xhr = new XMLHttpRequest();
            let divPluginsBottom = <HTMLDivElement> document.getElementById("pluginsPaneBottom");
            let divPluginsTop = <HTMLDivElement> document.getElementById("pluginsPaneTop");
            let divPluginBottomTabs = <HTMLDivElement> document.getElementById("pluginsListPaneBottom");
            let divPluginTopTabs = <HTMLDivElement> document.getElementById("pluginsListPaneTop");
            let coreLoaded = false;
              
            //Hide waiting page and let's bounce the logo !
            DashboardManager.DisplayWaitingLogo(true);

            xhr.onreadystatechange = () => {
                if (xhr.readyState === 4) {
                    if (xhr.status === 200) {
                        var catalog;
                        try {
                            catalog = JSON.parse(xhr.responseText);
                        } catch (ex) {
                            throw new Error("The catalog JSON is not well-formed");
                        }
                        
                        DashboardManager.UpdateClientInfo();

                        var pluginLoaded = 0;
                        var pluginstoload = 0;
                        
                        //Cleaning unwanted plugins
                        for(var i = 0; i < catalog.plugins.length; i++){
                            var plugin = catalog.plugins[i]; 
                            
                            if(plugin.enabled){
                                if (DashboardManager.NoWindowMode) {
                                    if (!plugin.nodeCompliant) {
                                        continue;
                                    }
                                }
                                
                                if (!DashboardManager.NoWindowMode) {
                                    if (plugin.nodeOnly) {
                                        continue;
                                    }
                                }
                                
                                pluginstoload ++;
                            }
                        }

                        for (var i = 0; i < catalog.plugins.length; i++) {
                            var plugin = catalog.plugins[i]; 
                            var existingLocation = document.querySelector('[data-plugin=' + plugin.id + ']');
                            var plugintab = document.createElement('div');
                            plugintab.classList.add('tab');
                            plugintab.textContent = plugin.name;
                            plugintab.setAttribute('data-plugin-target', plugin.id);
                                
                            if (!plugin.enabled || (DashboardManager.NoWindowMode && !plugin.nodeCompliant) || (!DashboardManager.NoWindowMode && plugin.nodeOnly)){
                                plugintab.style.display = 'none';
                                divPluginBottomTabs.appendChild(plugintab);
                                continue;
                            }
                            
                            var existingLocation = document.querySelector('[data-plugin=' + plugin.id + ']');

                            if (!existingLocation) {
                                var pluginmaindiv = document.createElement('div');
                                pluginmaindiv.classList.add('plugin');
                                pluginmaindiv.classList.add('plugin-' + plugin.id.toLowerCase());
                                pluginmaindiv.setAttribute('data-plugin', plugin.id);

                                var plugintab = document.createElement('div');
                                plugintab.classList.add('tab');
                                plugintab.textContent = plugin.name;
                                plugintab.setAttribute('data-plugin-target', plugin.id);
                                plugintab.setAttribute('aria-describedby', 'aria-pluginDesc');
                                plugintab.setAttribute('tabindex', "0");
                                plugintab.setAttribute('role', 'button');

                                if (plugin.panel === "bottom") {
                                    if (divPluginsBottom.children.length === 1) {
                                        pluginmaindiv.classList.add("active");
                                        plugintab.classList.add('active');
                                    }
                                    divPluginsBottom.appendChild(pluginmaindiv);
                                    divPluginBottomTabs.appendChild(plugintab);
                                }
                                else {
                                    if (divPluginsTop.children.length === 1) {
                                        pluginmaindiv.classList.add("active");
                                        plugintab.classList.add('active');
                                    }
                                    divPluginsTop.appendChild(pluginmaindiv);
                                    divPluginTopTabs.appendChild(plugintab);
                                }
                            }
                            var pluginscript = document.createElement("script");
                            pluginscript.setAttribute("src", vorlonBaseURL + "/vorlon/plugins/" + plugin.foldername + "/vorlon." + plugin.foldername + ".dashboard.min.js");

                            pluginscript.onload = (oError) => {
                                pluginLoaded++;
                                if (pluginLoaded >= pluginstoload) {
                                    DashboardManager.StartListeningServer(DashboardManager.ListenClientid);
                                    coreLoaded = true;
                                    this.PluginsLoaded = true;
                                    DashboardManager.HideWaitingLogo();
                                }
                            };
                            document.body.appendChild(pluginscript);
                        }
                        
                        var addPluginBtn = document.createElement('div');
                        addPluginBtn.className = "tab";
                        addPluginBtn.innerText = "+";
                        addPluginBtn.setAttribute('aria-describedby', 'aria-pluginAddition');
                        addPluginBtn.setAttribute('aria-label', 'Add new plugins');
                        addPluginBtn.setAttribute('role', 'button');
                        addPluginBtn.setAttribute('tabindex', '0');
                        
                        divPluginTopTabs.appendChild(addPluginBtn);
                        addPluginBtn.addEventListener('click',() => {
                            window.open("http://www.vorlonjs.io/plugins", "_blank");
                        });
                        
                        var collaspseBtn = document.createElement('div');
                        collaspseBtn.className = "fa fa-expand expandBtn";
                        divPluginBottomTabs.appendChild(collaspseBtn);
                        collaspseBtn.addEventListener('click',() => {
                            divPluginsBottom.style.height = 'calc(100% - 58px)';
                            divPluginsTop.style.height = '50px';
                            $('.hsplitter', divPluginsTop.parentElement).css('top', '50px');
                        });

                        var collaspseTopBtn = document.createElement('div');
                        collaspseTopBtn.className = "fa fa-expand expandBtn";
                        divPluginTopTabs.appendChild(collaspseTopBtn);
                        collaspseTopBtn.addEventListener('click',() => {
                            divPluginsBottom.style.height = '50px';
                            divPluginsTop.style.height = 'calc(100% - 58px)';
                            $('.hsplitter', divPluginsTop.parentElement).css('top', 'calc(100% - 58px)');
                        });
                    }
                }
            }

            xhr.open("GET", DashboardManager.CatalogUrl);
            xhr.send();
        }

        public static divMapper(pluginId: string): HTMLDivElement {
            let divId = pluginId + "div";
            return <HTMLDivElement> (document.getElementById(divId) || document.querySelector(`[data-plugin=${pluginId}]`));
        }

        public identify(): void {
            Core.Messenger.sendRealtimeMessage("", { "_sessionid": DashboardManager.SessionId }, VORLON.RuntimeSide.Dashboard, "identify");
        }

        public static goConfig(): void {
            location.href = DashboardManager.vorlonBaseURL + '/config';
        }
        
        public static ResetDashboard(reload: boolean = true): void {
            let sessionid = DashboardManager.SessionId;
            let xhr = new XMLHttpRequest();
            xhr.onreadystatechange = () => {
                if (xhr.readyState === 4) {
                    if (xhr.status === 200) {
                        if (reload) {
                            location.reload();
                        }
                    }
                }
            }

            xhr.open("GET", vorlonBaseURL + "/api/reset/" + sessionid);
            xhr.send();
        }

        public static ReloadClient(): void {
            Core.Messenger.sendRealtimeMessage("", DashboardManager.ListenClientid, VORLON.RuntimeSide.Dashboard, "reload");
        }

        public static addClient(client: any): void {
            DashboardManager.AddClientToList(client);
            if(!DashboardManager.DisplayingClient){
                DashboardManager.loadPlugins();
            }
        }
        
        public static removeClient(client: any): void {
            let clientInList = <HTMLLIElement> document.getElementById(client.clientid);
            if(clientInList){
                if(client.clientid === DashboardManager.ListenClientid){
                    DashboardManager.ListenClientid = "";
                    DashboardManager.StartListeningServer();
                    DashboardManager.DisplayWaitingLogo(false);
                }
                
                clientInList.parentElement.removeChild(clientInList);   
                DashboardManager.removeInClientList(client);
                        
                if (DashboardManager.ClientCount() === 0) {
                    DashboardManager.ResetDashboard(false);
                    DashboardManager.DisplayingClient = false;
                }
            }
        }
        
        public static removeInClientList(client: any): void{
            if(DashboardManager.ClientList[client.clientid] != null){
                delete DashboardManager.ClientList[client.clientid];
            }
        }

        public static getSessionId(): void {
            let xhr = new XMLHttpRequest();

            xhr.onreadystatechange = () => {
                if (xhr.readyState === 4) {
                    if (xhr.status === 200) {
                        var sessionId = xhr.responseText;
                        window.location.assign(vorlonBaseURL + "/dashboard/" + sessionId);
                    }
                }
            }

            xhr.open("GET", vorlonBaseURL + "/api/createsession");
            xhr.send();
        }
    }
}