examples = new Examples();
utils = new Utils();
monacoCreator = new MonacoCreator();
settingsPG = new SettingsPG(monacoCreator);
menuPG = new MenuPG();

/**
 * Apply things to the differents menu sizes
 */
var multipleSize = [1280, 1024, 'Mobile'];
var setToMultipleID = function (id, thingToDo, param) {
    multipleSize.forEach(function (size) {
        if (thingToDo == "innerHTML") {
            document.getElementById(id + size).innerHTML = param
        }
        else if (thingToDo == "click") {
            if (param.length > 1) {
                for (var i = 0; i < param.length; i++) {
                    document.getElementById(id + size).addEventListener("click", param[i]);
                }
            }
            else
                document.getElementById(id + size).addEventListener("click", param);
        }
        else if (thingToDo == "addClass") {
            document.getElementById(id + size).classList.add(param);
        }
        else if (thingToDo == "removeClass") {
            document.getElementById(id + size).classList.remove(param);
        }
        else if (thingToDo == "display") {
            document.getElementById(id + size).style.display = param;
        }
    });
};

/**
 * View split
 */
var splitInstance = Split(['#jsEditor', '#canvasZone']);

/**
 * Language of the script
 */
if (settingsPG.scriptLanguage == "TS") {
    var compilerTriggerTimeoutID;
    function triggerCompile(d, func) {
        if (compilerTriggerTimeoutID !== null) {
            window.clearTimeout(compilerTriggerTimeoutID);
        }
        compilerTriggerTimeoutID = window.setTimeout(function () {
            try {

                var output = transpileModule(d, {
                    module: ts.ModuleKind.AMD,
                    target: ts.ScriptTarget.ES5,
                    noLib: true,
                    noResolve: true,
                    suppressOutputPathCheck: true
                });
                if (typeof output === "string") {
                    func(output);
                }
            }
            catch (e) {
                utils.showError(e.message, e);
            }
        }, 100);
    }
    function transpileModule(input, options) {
        var inputFileName = options.jsx ? "module.tsx" : "module.ts";
        var sourceFile = ts.createSourceFile(inputFileName, input, options.target || ts.ScriptTarget.ES5);
        // Output
        var outputText;
        var program = ts.createProgram([inputFileName], options, {
            getSourceFile: function (fileName) { return fileName.indexOf("module") === 0 ? sourceFile : undefined; },
            writeFile: function (_name, text) { outputText = text; },
            getDefaultLibFileName: function () { return "lib.d.ts"; },
            useCaseSensitiveFileNames: function () { return false; },
            getCanonicalFileName: function (fileName) { return fileName; },
            getCurrentDirectory: function () { return ""; },
            getNewLine: function () { return "\r\n"; },
            fileExists: function (fileName) { return fileName === inputFileName; },
            readFile: function () { return ""; },
            directoryExists: function () { return true; },
            getDirectories: function () { return []; }
        });
        // Emit
        program.emit();
        if (outputText === undefined) {
            throw new Error("Output generation failed");
        }
        return outputText;
    }
    function getRunCode(callBack) {
        triggerCompile(monacoCreator.JsEditor.getValue(), function (result) {
            callBack(result + "var createScene = function() { return Playground.CreateScene(engine, engine.getRenderingCanvas()); }")
        });
    }

}


function getRunCode(callBack) {
    var code = monacoCreator.JsEditor.getValue();
    callBack(code);
}


var run = function () {

    var snippetV3Url = "https://snippet.babylonjs.com"
    var currentSnippetToken;
    var currentSnippetTitle = null;
    var currentSnippetDescription = null;
    var currentSnippetTags = null;
    var engine;
    var fpsLabel = document.getElementById("fpsLabel");
    var scripts;
    var zipCode;
    BABYLON.Engine.ShadersRepository = "/src/Shaders/";

    // TO DO : Rewrite this with unpkg.com
    if (location.href.indexOf("indexStable") !== -1) {
        setToMultipleID("currentVersion", "innerHTML", "v.3.0");
    } else {
        setToMultipleID("currentVersion", "innerHTML", "v.4.0");
    }

    var checkTypescriptSupport = function (xhr) {
        // If we're loading TS content and it's JS page
        if (xhr.responseText.indexOf("class Playground") !== -1) {
            if (settingsPG.ScriptLanguage == "JS") {
                settingsPG.ScriptLanguage = "TS";
                location.reload();
                return false;
            }
        } else { // If we're loading JS content and it's TS page
            if (settingsPG.ScriptLanguage == "TS") {
                settingsPG.ScriptLanguage = "JS";
                location.reload();
                return false;
            }
        }
        return true;
    }

    var loadScript = function (scriptURL, title) {
        var xhr = new XMLHttpRequest();

        xhr.open('GET', scriptURL, true);

        xhr.onreadystatechange = function () {
            if (xhr.readyState === 4) {
                if (xhr.status === 200) {

                    if (!checkTypescriptSupport(xhr)) return;

                    xhr.onreadystatechange = null;
                    monacoCreator.BlockEditorChange = true;
                    monacoCreator.JsEditor.setValue(xhr.responseText);
                    monacoCreator.JsEditor.setPosition({ lineNumber: 0, column: 0 });
                    monacoCreator.BlockEditorChange = false;
                    compileAndRun();

                    currentSnippetToken = null;
                }
            }
        };

        xhr.send(null);
    };

    var loadScriptsList = function () {

        var exampleList = document.getElementById("exampleList");

        var xhr = new XMLHttpRequest();
        //Open Typescript or Javascript examples
        // TO DO - Check why it's always javascript ? Is it hard coded in html page ?
        // Should we merge both lists ?
        if (exampleList.className != 'typescript') {
            xhr.open('GET', 'https://raw.githubusercontent.com/BabylonJS/Documentation/master/examples/list.json', true);
        }
        else {
            xhr.open('GET', 'https://raw.githubusercontent.com/BabylonJS/Documentation/master/examples/list_ts.json', true);
        }

        xhr.onreadystatechange = function () {
            if (xhr.readyState === 4) {
                if (xhr.status === 200) {
                    scripts = JSON.parse(xhr.response)["examples"];

                    function sortScriptsList(a, b) {
                        if (a.title < b.title) return -1;
                        else return 1;
                    }
                    scripts.sort(sortScriptsList);

                    if (exampleList) {
                        for (var i = 0; i < scripts.length; i++) {
                            scripts[i].samples.sort(sortScriptsList);

                            var exampleCategory = document.createElement("div");
                            exampleCategory.classList.add("categoryContainer");

                            var exampleCategoryTitle = document.createElement("p");
                            exampleCategoryTitle.innerText = scripts[i].title;
                            exampleCategory.appendChild(exampleCategoryTitle);

                            for (var ii = 0; ii < scripts[i].samples.length; ii++) {
                                var example = document.createElement("div");
                                example.classList.add("itemLine");
                                example.id = ii;

                                var exampleImg = document.createElement("img");
                                exampleImg.src = scripts[i].samples[ii].icon.replace("icons", "https://doc.babylonjs.com/examples/icons");
                                exampleImg.setAttribute("onClick", "document.getElementById('PGLink_" + scripts[i].samples[ii].PGID + "').click();");

                                var exampleContent = document.createElement("div");
                                exampleContent.classList.add("itemContent");
                                exampleContent.setAttribute("onClick", "document.getElementById('PGLink_" + scripts[i].samples[ii].PGID + "').click();");

                                var exampleContentLink = document.createElement("div");
                                exampleContentLink.classList.add("itemContentLink");

                                var exampleTitle = document.createElement("h3");
                                exampleTitle.classList.add("exampleCategoryTitle");
                                exampleTitle.innerText = scripts[i].samples[ii].title;
                                var exampleDescr = document.createElement("div");
                                exampleDescr.classList.add("itemLineChild");
                                exampleDescr.innerText = scripts[i].samples[ii].description;

                                var exampleDocLink = document.createElement("a");
                                exampleDocLink.classList.add("itemLineDocLink");
                                exampleDocLink.innerText = "Documentation";
                                exampleDocLink.href = scripts[i].samples[ii].doc;
                                exampleDocLink.target = "_blank";

                                var examplePGLink = document.createElement("a");
                                examplePGLink.id = "PGLink_" + scripts[i].samples[ii].PGID;
                                examplePGLink.classList.add("itemLinePGLink");
                                examplePGLink.innerText = "Display";
                                examplePGLink.href = scripts[i].samples[ii].PGID;

                                exampleContentLink.appendChild(exampleTitle);
                                exampleContentLink.appendChild(exampleDescr);
                                exampleContent.appendChild(exampleContentLink);
                                exampleContent.appendChild(exampleDocLink);
                                exampleContent.appendChild(examplePGLink);

                                example.appendChild(exampleImg);
                                example.appendChild(exampleContent);

                                exampleCategory.appendChild(example);
                            }

                            exampleList.appendChild(exampleCategory);
                        }

                        var noResultContainer = document.createElement("div");
                        noResultContainer.id = "noResultsContainer";
                        noResultContainer.classList.add("categoryContainer");
                        noResultContainer.style.display = "none";
                        noResultContainer.innerHTML = "<p id='noResults'>No results found.</p>";
                        exampleList.appendChild(noResultContainer);
                    }

                    if (!location.hash) {
                        // Query string
                        var queryString = window.location.search;

                        if (queryString) {
                            var query = queryString.replace("?", "");
                            index = parseInt(query);
                            if (!isNaN(index)) {
                                // TO DO - Should we remove this deprecated code ?
                                var newPG = "";
                                switch (index) {
                                    case 1: newPG = "#TAZ2CB#0"; break; // Basic scene
                                    case 2: newPG = "#A1210C#0"; break; // Basic elements
                                    case 3: newPG = "#CURCZC#0"; break; // Rotation and scaling
                                    case 4: newPG = "#DXARSP#0"; break; // Materials
                                    case 5: newPG = "#1A3M5C#0"; break; // Cameras
                                    case 6: newPG = "#AQRDKW#0"; break; // Lights
                                    case 7: newPG = "#QYFDDP#1"; break; // Animations
                                    case 8: newPG = "#9RI8CG#0"; break; // Sprites
                                    case 9: newPG = "#U8MEB0#0"; break; // Collisions
                                    case 10: newPG = "#KQV9SA#0"; break; // Intersections
                                    case 11: newPG = "#NU4F6Y#0"; break; // Picking
                                    case 12: newPG = "#EF9X5R#0"; break; // Particles
                                    case 13: newPG = "#7G0IQW#0"; break; // Environment
                                    case 14: newPG = "#95PXRY#0"; break; // Height map
                                    case 15: newPG = "#IFYDRS#0"; break; // Shadows
                                    case 16: newPG = "#AQZJ4C#0"; break; // Import meshes
                                    case 17: newPG = "#J19GYK#0"; break; // Actions
                                    case 18: newPG = "#UZ23UH#0"; break; // Drag and drop
                                    case 19: newPG = "#AQZJ4C#0"; break; // Fresnel
                                    case 20: newPG = "#8ZNVGR#0"; break; // Easing functions
                                    case 21: newPG = "#B2ZXG6#0"; break; // Procedural texture
                                    case 22: newPG = "#DXAEUY#0"; break; // Basic sounds
                                    case 23: newPG = "#EDVU95#0"; break; // Sound on mesh
                                    case 24: newPG = "#N96NXC#0"; break; // SSAO rendering pipeline
                                    case 25: newPG = "#7D2QDD#0"; break; // SSAO 2
                                    case 26: newPG = "#V2DAKC#0"; break; // Volumetric light scattering
                                    case 27: newPG = "#XH85A9#0"; break; // Refraction and reflection
                                    case 28: newPG = "#8MGKWK#0"; break; // PBR
                                    case 29: newPG = "#0K8EYN#0"; break; // Instanced bones
                                    case 30: newPG = "#C245A1#0"; break; // Pointer events handling
                                    case 31: newPG = "#TAFSN0#2"; break; // WebVR
                                    case 32: newPG = "#3VMTI9#0"; break; // GUI
                                    case 33: newPG = "#7149G4#0"; break; // Physics

                                    default: newPG = ""; break;
                                }
                                window.location.href = location.protocol + "//" + location.host + location.pathname + "#" + newPG;
                            } else if (query.indexOf("=") === -1) {
                                loadScript("scripts/" + query + ".js", query);
                            } else {
                                loadScript(settingsPG.DefaultScene, "Basic scene");
                            }
                        } else {
                            loadScript(settingsPG.DefaultScene, "Basic scene");
                        }
                    }

                    // Restore theme
                    settingsPG.restoreTheme(monacoCreator);
                    // Restore language
                    settingsPG.setScriptLanguage();

                    // TO DO - Check why this doesn't work.
                    // // Remove editor if window size is less than 850px
                    // var removeEditorForSmallScreen = function () {
                    //     if (mq.matches) {
                    //         splitInstance.collapse(0);
                    //     } else {
                    //         splitInstance.setSizes([50, 50]);
                    //     }
                    // }
                    // var mq = window.matchMedia("(max-width: 850px)");
                    // mq.addListener(removeEditorForSmallScreen);
                }
            }
        };

        xhr.send(null);
    }

    var createNewScript = function () {
        // check if checked is on
        let iCanClear = checkSafeMode("Are you sure you want to create a new playground?");
        if (!iCanClear) return;
        location.hash = "";
        currentSnippetToken = null;
        currentSnippetTitle = null;
        currentSnippetDescription = null;
        currentSnippetTags = null;
        showNoMetadata();
        if (monacoCreator.monacoMode === "javascript") {
            monacoCreator.JsEditor.setValue('// You have to create a function called createScene. This function must return a BABYLON.Scene object\r\n// You can reference the following variables: scene, canvas\r\n// You must at least define a camera\r\n\r\nvar createScene = function() {\r\n\tvar scene = new BABYLON.Scene(engine);\r\n\tvar camera = new BABYLON.ArcRotateCamera("Camera", -Math.PI / 2, Math.PI / 2, 12, BABYLON.Vector3.Zero(), scene);\r\n\tcamera.attachControl(canvas, true);\r\n\r\n\r\n\r\n\treturn scene;\r\n};');
        } else {
            monacoCreator.JsEditor.setValue('// You have to create a class called Playground. This class must provide a static function named CreateScene(engine, canvas) which must return a BABYLON.Scene object\r\n// You must at least define a camera inside the CreateScene function\r\n\r\nclass Playground {\r\n\tpublic static CreateScene(engine: BABYLON.Engine, canvas: HTMLCanvasElement): BABYLON.Scene {\r\n\t\tvar scene = new BABYLON.Scene(engine);\r\n\r\n\t\tvar camera = new BABYLON.FreeCamera("camera1", new BABYLON.Vector3(0, 5, -10), scene);\r\n\t\tcamera.setTarget(BABYLON.Vector3.Zero());\r\n\t\tcamera.attachControl(canvas, true);\r\n\r\n\t\treturn scene;\r\n\t}\r\n}');
        }
        monacoCreator.JsEditor.setPosition({ lineNumber: 11, column: 0 });
        monacoCreator.JsEditor.focus();
        compileAndRun();
    }

    var clear = function () {
        // check if checked is on
        let iCanClear = checkSafeMode("Are you sure you want to clear the playground?");
        if (!iCanClear) return;
        location.hash = "";
        currentSnippetToken = null;
        monacoCreator.JsEditor.setValue('');
        monacoCreator.JsEditor.setPosition({ lineNumber: 0, column: 0 });
        monacoCreator.JsEditor.focus();
    }

    // TO DO - Is this really usefull ? Safe mode only available in full HD screen, not for small screen ? Why ?!
    var checkSafeMode = function (message) {
        var safeToggle = document.getElementById("safemodeToggle1280");
        if (safeToggle.classList.contains('checked')) {
            let confirm = window.confirm(message);
            if (!confirm) {
                return false;
            } else {
                document.getElementById("safemodeToggle1280").classList.toggle('checked');
                return true;
            }
        } else {
            return true;
        }
    }

    var showNoMetadata = function () {
        if (currentSnippetTitle) {
            document.getElementById("saveFormTitle").value = currentSnippetTitle;
            document.getElementById("saveFormTitle").readOnly = true;
        }
        else {
            document.getElementById("saveFormTitle").value = '';
            document.getElementById("saveFormTitle").readOnly = false;
        }
        if (currentSnippetDescription) {
            document.getElementById("saveFormDescription").value = currentSnippetDescription;
            document.getElementById("saveFormDescription").readOnly = true;
        }
        else {
            document.getElementById("saveFormDescription").value = '';
            document.getElementById("saveFormDescription").readOnly = false;
        }
        if (currentSnippetTags) {
            document.getElementById("saveFormTags").value = currentSnippetTags;
            document.getElementById("saveFormTags").readOnly = true;
        }
        else {
            document.getElementById("saveFormTags").value = '';
            document.getElementById("saveFormTags").readOnly = false;
        }
        document.getElementById("saveFormButtons").style.display = "block";
        document.getElementById("saveFormButtonOk").style.display = "inline-block";
    };
    showNoMetadata();

    var hideNoMetadata = function () {
        document.getElementById("saveFormTitle").readOnly = true;
        document.getElementById("saveFormDescription").readOnly = true;
        document.getElementById("saveFormTags").readOnly = true;
        document.getElementById("saveFormButtonOk").style.display = "none";
        setToMultipleID("metadataButton", "display", "inline-block");
    };

    compileAndRun = function () {
        try {
            var waitRing = document.getElementById("waitDiv");
            if (waitRing) {
                waitRing.style.display = "none";
            }

            if (!BABYLON.Engine.isSupported()) {
                utils.showError("Your browser does not support WebGL. Please, try to update it, or install a compatible one.", null);
                return;
            }

            var showInspector = false;
            showBJSPGMenu();
            monacoCreator.JsEditor.updateOptions({ readOnly: false });

            if (BABYLON.Engine.LastCreatedScene && BABYLON.Engine.LastCreatedScene.debugLayer.isVisible()) {
                showInspector = true;
            }

            if (engine) {
                engine.dispose();
                engine = null;
            }

            var canvas = document.getElementById("renderCanvas");
            document.getElementById("errorZone").style.display = 'none';
            document.getElementById("errorZone").innerHTML = "";
            document.getElementById("statusBar").innerHTML = "Loading assets... Please wait.";
            var checkCamera = true;
            var checkSceneCount = true;
            var createEngineFunction = "createDefaultEngine";
            var createSceneFunction;

            getRunCode(function (code) {
                var createDefaultEngine = function () {
                    return new BABYLON.Engine(canvas, true, { preserveDrawingBuffer: true, stencil: true });
                }

                var scene;
                var defaultEngineZip = "new BABYLON.Engine(canvas, true, { preserveDrawingBuffer: true, stencil: true })";

                if (code.indexOf("createEngine") !== -1) {
                    createEngineFunction = "createEngine";
                }

                // Check for different typos
                if (code.indexOf("delayCreateScene") !== -1) { // createScene
                    createSceneFunction = "delayCreateScene";
                    checkCamera = false;
                } else if (code.indexOf("createScene") !== -1) { // createScene
                    createSceneFunction = "createScene";
                } else if (code.indexOf("CreateScene") !== -1) { // CreateScene
                    createSceneFunction = "CreateScene";
                } else if (code.indexOf("createscene") !== -1) { // createscene
                    createSceneFunction = "createscene";
                }

                if (!createSceneFunction) {
                    // just pasted code.
                    engine = createDefaultEngine();
                    scene = new BABYLON.Scene(engine);
                    eval("runScript = function(scene, canvas) {" + code + "}");
                    runScript(scene, canvas);

                    zipCode = "var engine = " + defaultEngineZip + ";\r\nvar scene = new BABYLON.Scene(engine);\r\n\r\n" + code;
                } else {
                    //execute the code
                    eval(code);
                    //create engine
                    eval("engine = " + createEngineFunction + "()");
                    if (!engine) {
                        utils.showError("createEngine function must return an engine.", null);
                        return;
                    }

                    //create scene
                    eval("scene = " + createSceneFunction + "()");

                    if (!scene) {
                        utils.showError(createSceneFunction + " function must return a scene.", null);
                        return;
                    }

                    // if scene returns a promise avoid checks
                    if (scene.then) {
                        checkCamera = false;
                        checkSceneCount = false;
                    }

                    var createEngineZip = (createEngineFunction === "createEngine")
                        ? "createEngine()"
                        : defaultEngineZip;

                    zipCode =
                        code + "\r\n\r\n" +
                        "var engine = " + createEngineZip + ";\r\n" +
                        "var scene = " + createSceneFunction + "();";

                }

                engine.runRenderLoop(function () {
                    if (engine.scenes.length === 0) {
                        return;
                    }

                    if (canvas.width !== canvas.clientWidth) {
                        engine.resize();
                    }

                    var scene = engine.scenes[0];

                    if (scene.activeCamera || scene.activeCameras.length > 0) {
                        scene.render();
                    }

                    fpsLabel.innerHTML = engine.getFps().toFixed() + " fps";
                });

                if (checkSceneCount && engine.scenes.length === 0) {

                    utils.showError("You must at least create a scene.", null);
                    return;
                }

                if (checkCamera && engine.scenes[0].activeCamera == null) {
                    utils.showError("You must at least create a camera.", null);
                    return;
                } else if (scene.then) {
                    scene.then(function () {
                        document.getElementById("statusBar").innerHTML = "";
                    });
                } else {
                    engine.scenes[0].executeWhenReady(function () {
                        document.getElementById("statusBar").innerHTML = "";
                    });
                }

                if (scene) {
                    if (showInspector) {
                        if (scene.then) {
                            // Handle if scene is a promise
                            scene.then(function (s) {
                                if (!s.debugLayer.isVisible()) {
                                    s.debugLayer.show({ embedMode: true });
                                }
                            })
                        } else {
                            if (!scene.debugLayer.isVisible()) {
                                scene.debugLayer.show({ embedMode: true });
                            }
                        }
                    }
                }
            });

        } catch (e) {
            utils.showError(e.message, e);
            // Also log error in console to help debug playgrounds
            console.error(e);
        }
    };

    window.addEventListener("resize",
        function () {
            if (engine) {
                engine.resize();
            }
        });

    // Load scripts list
    loadScriptsList();

    // Zip
    var addContentToZip = function (zip, name, url, replace, buffer, then) {
        if (url.substring(0, 5) == "data:" || url.substring(0, 5) == "http:" || url.substring(0, 5) == "blob:" || url.substring(0, 6) == "https:") {
            then();
            return;
        }

        var xhr = new XMLHttpRequest();

        xhr.open('GET', url, true);

        if (buffer) {
            xhr.responseType = "arraybuffer";
        }

        xhr.onreadystatechange = function () {
            if (xhr.readyState === 4) {
                if (xhr.status === 200) {
                    var text;
                    if (!buffer) {
                        if (replace) {
                            var splits = replace.split("\r\n");
                            for (var index = 0; index < splits.length; index++) {
                                splits[index] = "        " + splits[index];
                            }
                            replace = splits.join("\r\n");

                            text = xhr.responseText.replace("####INJECT####", replace);
                        } else {
                            text = xhr.responseText;
                        }
                    }

                    zip.file(name, buffer ? xhr.response : text);

                    then();
                }
            }
        };

        xhr.send(null);
    }

    var addTexturesToZip = function (zip, index, textures, folder, then) {

        if (index === textures.length || !textures[index].name) {
            then();
            return;
        }

        if (textures[index].isRenderTarget || textures[index] instanceof BABYLON.DynamicTexture || textures[index].name.indexOf("data:") !== -1) {
            addTexturesToZip(zip, index + 1, textures, folder, then);
            return;
        }

        if (textures[index].isCube) {
            if (textures[index].name.indexOf("dds") === -1) {
                if (textures[index]._extensions) {
                    for (var i = 0; i < 6; i++) {
                        textures.push({ name: textures[index].name + textures[index]._extensions[i] });
                    }
                } else if (textures[index]._files) {
                    for (var i = 0; i < 6; i++) {
                        textures.push({ name: textures[index]._files[i] });
                    }
                }
            }
            else {
                textures.push({ name: textures[index].name });
            }
            addTexturesToZip(zip, index + 1, textures, folder, then);
            return;
        }


        if (folder == null) {
            folder = zip.folder("textures");
        }
        var url;

        if (textures[index].video) {
            url = textures[index].video.currentSrc;
        } else {
            // url = textures[index].name;
            url = textures[index].url ? textures[index].url : textures[index].name;
        }

        var name = textures[index].name.replace("textures/", "");
        // var name = url.substr(url.lastIndexOf("/") + 1);

        if (url != null) {
            addContentToZip(folder,
                name,
                url,
                null,
                true,
                function () {
                    addTexturesToZip(zip, index + 1, textures, folder, then);
                });
        }
        else {
            addTexturesToZip(zip, index + 1, textures, folder, then);
        }
    }

    var addImportedFilesToZip = function (zip, index, importedFiles, folder, then) {
        if (index === importedFiles.length) {
            then();
            return;
        }

        if (!folder) {
            folder = zip.folder("scenes");
        }
        var url = importedFiles[index];

        var name = url.substr(url.lastIndexOf("/") + 1);

        addContentToZip(folder,
            name,
            url,
            null,
            true,
            function () {
                addImportedFilesToZip(zip, index + 1, importedFiles, folder, then);
            });
    }

    var getZip = function () {
        if (engine.scenes.length === 0) {
            return;
        }

        var zip = new JSZip();

        var scene = engine.scenes[0];

        var textures = scene.textures;

        var importedFiles = scene.importedMeshesFiles;

        document.getElementById("statusBar").innerHTML = "Creating archive... Please wait.";

        if (zipCode.indexOf("textures/worldHeightMap.jpg") !== -1) {
            textures.push({ name: "textures/worldHeightMap.jpg" });
        }

        addContentToZip(zip,
            "index.html",
            "zipContent/index.html",
            zipCode,
            false,
            function () {
                addTexturesToZip(zip,
                    0,
                    textures,
                    null,
                    function () {
                        addImportedFilesToZip(zip,
                            0,
                            importedFiles,
                            null,
                            function () {
                                var blob = zip.generate({ type: "blob" });
                                saveAs(blob, "sample.zip");
                                document.getElementById("statusBar").innerHTML = "";
                            });
                    });
            });
    }

    // Versions
    // TO DO - Rewrite that
    setVersion = function (version) {
        // switch (version) {
        //     case "stable":
        //         location.href = "indexStable.html" + location.hash;
        //         break;
        //     default:
        //         location.href = "index.html" + location.hash;
        //         break;
        // }
    }

    // TO DO - Make it work on small screens and mobile
    showQRCode = function () {
        $("#qrCodeImage").empty();
        var playgroundCode = window.location.href.split("#");
        playgroundCode.shift();
        $("#qrCodeImage").qrcode({ text: "https://playground.babylonjs.com/frame.html#" + (playgroundCode.join("#")) });
    };

    // Fullscreen
    document.getElementById("renderCanvas").addEventListener("webkitfullscreenchange", function () {
        if (document.webkitIsFullScreen) goFullPage();
        else exitFullPage();
    }, false);

    var goFullPage = function () {
        var canvasElement = document.getElementById("renderCanvas");
        canvasElement.style.position = "absolute";
        canvasElement.style.top = 0;
        canvasElement.style.left = 0;
        canvasElement.style.zIndex = 100;
    }
    var exitFullPage = function () {
        document.getElementById("renderCanvas").style.position = "relative";
        document.getElementById("renderCanvas").style.zIndex = 0;
    }
    var goFullscreen = function () {
        if (engine) {
            engine.switchFullscreen(true);
        }
    }
    var editorGoFullscreen = function () {
        var editorDiv = document.getElementById("jsEditor");
        if (editorDiv.requestFullscreen) {
            editorDiv.requestFullscreen();
        } else if (editorDiv.mozRequestFullScreen) {
            editorDiv.mozRequestFullScreen();
        } else if (editorDiv.webkitRequestFullscreen) {
            editorDiv.webkitRequestFullscreen();
        }

    }

    var toggleEditor = function () {
        var editorButton = document.getElementById("editorButton1280");
        var scene = engine.scenes[0];

        // If the editor is present
        if (editorButton.classList.contains('checked')) {
            setToMultipleID("editorButton", "removeClass", 'checked');
            splitInstance.collapse(0);
            setToMultipleID("editorButton", "innerHTML", 'Editor <i class="fa fa-square" aria-hidden="true"></i>');
        } else {
            setToMultipleID("editorButton", "addClass", 'checked');
            splitInstance.setSizes([50, 50]);  // Reset
            setToMultipleID("editorButton", "innerHTML", 'Editor <i class="fa fa-check-square" aria-hidden="true"></i>');
        }
        engine.resize();

        if (scene.debugLayer.isVisible()) {
            scene.debugLayer.show({ embedMode: true });
        }
    }

    

    var toggleDebug = function () {
        // Always showing the debug layer, because you can close it by itself
        var scene = engine.scenes[0];
        if (scene.debugLayer.isVisible()) {
            scene.debugLayer.hide();
        }
        else {
            scene.debugLayer.show({ embedMode: true });
        }
    }

    var toggleMetadata = function () {
        document.getElementById("saveLayer").style.display = "block";
    }

    var formatCode = function () {
        monacoCreator.JsEditor.getAction('editor.action.formatDocument').run();
    }

    var toggleMinimap = function () {
        var minimapToggle = document.getElementById("minimapToggle1280");
        if (minimapToggle.classList.contains('checked')) {
            monacoCreator.JsEditor.updateOptions({ minimap: { enabled: false } });
            setToMultipleID("minimapToggle", "innerHTML", 'Minimap <i class="fa fa-square" aria-hidden="true"></i>');
        } else {
            monacoCreator.JsEditor.updateOptions({ minimap: { enabled: true } });
            setToMultipleID("minimapToggle", "innerHTML", 'Minimap <i class="fa fa-check-square" aria-hidden="true"></i>');
        }
        minimapToggle.classList.toggle('checked');
    }


    //Navigation Overwrites
    var exitPrompt = function (e) {
        var safeToggle = document.getElementById("safemodeToggle1280");
        if (safeToggle.classList.contains('checked')) {
            e = e || window.event;
            var message =
                'This page is asking you to confirm that you want to leave - data you have entered may not be saved.';
            if (e) {
                e.returnValue = message;
            }
            return message;
        }
    };

    window.onbeforeunload = exitPrompt;

    // Snippet
    var save = function () {

        // Retrieve title if necessary
        if (document.getElementById("saveLayer")) {
            currentSnippetTitle = document.getElementById("saveFormTitle").value;
            currentSnippetDescription = document.getElementById("saveFormDescription").value;
            currentSnippetTags = document.getElementById("saveFormTags").value;
        }

        var xmlHttp = new XMLHttpRequest();
        xmlHttp.onreadystatechange = function () {
            if (xmlHttp.readyState === 4) {
                if (xmlHttp.status === 200) {
                    var baseUrl = location.href.replace(location.hash, "").replace(location.search, "");
                    var snippet = JSON.parse(xmlHttp.responseText);
                    var newUrl = baseUrl + "#" + snippet.id;
                    currentSnippetToken = snippet.id;
                    if (snippet.version && snippet.version !== "0") {
                        newUrl += "#" + snippet.version;
                    }
                    location.href = newUrl;
                    // Hide the complete title & co message
                    hideNoMetadata();
                    compileAndRun();
                } else {
                    utils.showError("Unable to save your code. It may be too long.", null);
                }
            }
        }

        xmlHttp.open("POST", snippetV3Url + (currentSnippetToken ? "/" + currentSnippetToken : ""), true);
        xmlHttp.setRequestHeader("Content-Type", "application/json");

        var dataToSend = {
            payload: JSON.stringify({
                code: monacoCreator.JsEditor.getValue()
            }),
            name: currentSnippetTitle,
            description: currentSnippetDescription,
            tags: currentSnippetTags
        };

        xmlHttp.send(JSON.stringify(dataToSend));
    }

    var askForSave = function () {
        if (currentSnippetTitle == null
            || currentSnippetDescription == null
            || currentSnippetTags == null) {

            document.getElementById("saveLayer").style.display = "block";
        }
        else {
            save();
        }
    };
    document.getElementById("saveFormButtonOk").addEventListener("click", function () {
        document.getElementById("saveLayer").style.display = "none";
        save();
    });
    document.getElementById("saveFormButtonCancel").addEventListener("click", function () {
        document.getElementById("saveLayer").style.display = "none";
    });
    setToMultipleID("mainTitle", "innerHTML", "v" + BABYLON.Engine.Version);

    var previousHash = "";

    var cleanHash = function () {
        var splits = decodeURIComponent(location.hash.substr(1)).split("#");

        if (splits.length > 2) {
            splits.splice(2, splits.length - 2);
        }

        location.hash = splits.join("#");
    }

    var checkHash = function (firstTime) {
        if (location.hash) {
            if (previousHash !== location.hash) {
                cleanHash();

                previousHash = location.hash;

                try {
                    var xmlHttp = new XMLHttpRequest();
                    xmlHttp.onreadystatechange = function () {
                        if (xmlHttp.readyState === 4) {
                            if (xmlHttp.status === 200) {

                                if (!checkTypescriptSupport(xmlHttp)) {
                                    return;
                                }

                                var snippet = JSON.parse(xmlHttp.responseText);

                                monacoCreator.BlockEditorChange = true;
                                monacoCreator.JsEditor.setValue(JSON.parse(snippet.jsonPayload).code.toString());

                                // Check if title / descr / tags are already set
                                if (snippet.name != null && snippet.name != "") {
                                    currentSnippetTitle = snippet.name;
                                }
                                else currentSnippetTitle = null;

                                if (snippet.description != null && snippet.description != "") {
                                    currentSnippetDescription = snippet.description;
                                }
                                else currentSnippetDescription = null;

                                if (snippet.tags != null && snippet.tags != "") {
                                    currentSnippetTags = snippet.tags;
                                }
                                else currentSnippetTags = null;

                                if (currentSnippetTitle != null && currentSnippetTags != null && currentSnippetDescription) {
                                    if (document.getElementById("saveLayer")) {

                                        document.getElementById("saveFormTitle").value = currentSnippetTitle;
                                        document.getElementById("saveFormDescription").value = currentSnippetDescription;
                                        document.getElementById("saveFormTags").value = currentSnippetTags;

                                        hideNoMetadata();
                                    }
                                }
                                else {
                                    showNoMetadata();
                                }

                                monacoCreator.JsEditor.setPosition({ lineNumber: 0, column: 0 });
                                monacoCreator.BlockEditorChange = false;
                                compileAndRun();

                                // setToMultipleID("currentScript", "innerHTML", "Custom");
                            }
                        }
                    };

                    var hash = location.hash.substr(1);
                    currentSnippetToken = hash.split("#")[0];
                    if (!hash.split("#")[1]) hash += "#0";


                    xmlHttp.open("GET", snippetV3Url + "/" + hash.replace("#", "/"));
                    xmlHttp.send();
                } catch (e) {

                }
            }
        }
        setTimeout(checkHash, 200);
    }

    checkHash(true);


    // ---------- UI

    // Run
    setToMultipleID("runButton", "click", compileAndRun);
    // New
    setToMultipleID("newButton", "click", createNewScript);
    // Clear 
    setToMultipleID("clearButton", "click", clear);
    // Save
    setToMultipleID("saveButton", "click", askForSave);
    // Zip
    setToMultipleID("zipButton", "click", getZip);
    // // Themes
    setToMultipleID("darkTheme", "click", [settingsPG.setTheme.bind(settingsPG, 'dark'), menuPG.clickOptionSub.bind(menuPG)]);
    setToMultipleID("lightTheme", "click", [settingsPG.setTheme.bind(settingsPG, 'light'), menuPG.clickOptionSub.bind(menuPG)]);
    // Size
    var displayFontSize = document.getElementsByClassName('displayFontSize');
    for (var i = 0; i < displayFontSize.length; i++) {
        var options = displayFontSize[i].querySelectorAll('.option');
        for (var j = 0; j < options.length; j++) {
            options[j].addEventListener('click', menuPG.clickOptionSub.bind(menuPG));
            options[j].addEventListener('click', settingsPG.setFontSize.bind(settingsPG, options[j].innerText));
        }
    }
    // Footer links
    var displayFontSize = document.getElementsByClassName('displayFooterLinks');
    for (var i = 0; i < displayFontSize.length; i++) {
        var options = displayFontSize[i].querySelectorAll('.option');
        for (var j = 0; j < options.length; j++) {
            options[j].addEventListener('click', menuPG.clickOptionSub.bind(this));
        }
    }
    // Language (JS / TS)
    setToMultipleID("toTSbutton", "click", function () {
        settingsPG.ScriptLanguage = "TS";
        location.reload();
    });
    setToMultipleID("toJSbutton", "click", function () {
        settingsPG.ScriptLanguage = "JS";
        location.reload();
    });
    // Safe mode
    setToMultipleID("safemodeToggle", 'click', function () {
        document.getElementById("safemodeToggle1280").classList.toggle('checked');
        if (document.getElementById("safemodeToggle1280").classList.contains('checked')) {
            setToMultipleID("safemodeToggle", "innerHTML", 'Safe mode <i class="fa fa-check-square" aria-hidden="true"></i>');
        } else {
            setToMultipleID("safemodeToggle", "innerHTML", 'Safe mode <i class="fa fa-square" aria-hidden="true"></i>');
        }
    });
    // Editor
    setToMultipleID("editorButton", "click", toggleEditor);
    // FullScreen
    setToMultipleID("fullscreenButton", "click", goFullscreen);
    // Editor fullScreen
    setToMultipleID("editorFullscreenButton", "click", editorGoFullscreen);
    // Format
    setToMultipleID("formatButton", "click", formatCode);
    // Format
    setToMultipleID("minimapToggle", "click", toggleMinimap);
    // Debug
    setToMultipleID("debugButton", "click", toggleDebug);
    // Metadata
    setToMultipleID("metadataButton", "click", toggleMetadata);

    // Restore theme
    settingsPG.restoreTheme(monacoCreator);
    // Restore language
    settingsPG.setScriptLanguage();

    menuPG.resizeBigCanvas();
}