/**
 * This JS file is for Monaco management
 */
class MonacoCreator {
    constructor(parent) {
        this.parent = parent;
        
        this.jsEditor = null;
        this.monacoMode = "javascript";
        this.blockEditorChange = false;

        this.compilerTriggerTimeoutID = null;
    }

    // ACCESSORS

    get JsEditor() {
        return this.jsEditor;
    };

    getCode() {
        if(this.jsEditor) return this.jsEditor.getValue();
        else return "";
    };
    setCode(value) {
        this.jsEditor.setValue(value);
    };

    get MonacoMode() {
        return this.monacoMode;
    };
    set MonacoMode(mode) {
        if (this.monacoMode != "javascript"
            && this.monacoMode != "typescript")
            console.warn("Error while defining Monaco Mode");
        this.monacoMode = mode;
    };

    get BlockEditorChange() {
        return this.blockEditorChange;
    };
    set BlockEditorChange(value) {
        this.blockEditorChange = value;
    };

    // FUNCTIONS

    /**
     * Load the Monaco Node module.
     */
    loadMonaco() {
        var xhr = new XMLHttpRequest();

        xhr.open('GET', "babylon.d.txt", true);

        xhr.onreadystatechange = function () {
            if (xhr.readyState === 4) {
                if (xhr.status === 200) {
                    require.config({ paths: { 'vs': 'node_modules/monaco-editor/min/vs' } });
                    require(['vs/editor/editor.main'], function () {
                        if (this.monacoMode === "javascript") {
                            monaco.languages.typescript.javascriptDefaults.addExtraLib(xhr.responseText, 'babylon.d.ts');
                        } else {
                            monaco.languages.typescript.typescriptDefaults.addExtraLib(xhr.responseText, 'babylon.d.ts');
                        }

                        this.parent.main.run();
                    }.bind(this));
                }
            }
        }.bind(this);
        xhr.send(null);
    };

    /**
     * Function to (re)create the editor
     */
    createMonacoEditor() {
        var oldCode = "";
        if (this.jsEditor) {
            oldCode = this.jsEditor.getValue();
            this.jsEditor.dispose();
        }

        var editorOptions = {
            value: "",
            language: this.monacoMode,
            lineNumbers: true,
            tabSize: "auto",
            insertSpaces: "auto",
            roundedSelection: true,
            automaticLayout: true,
            scrollBeyondLastLine: false,
            readOnly: false,
            theme: this.parent.settingsPG.vsTheme,
            contextmenu: false,
            folding: true,
            showFoldingControls: "always",
            renderIndentGuides: true,
            minimap: {
                enabled: true
            }
        };
        editorOptions.minimap.enabled = document.getElementById("minimapToggle1280").classList.contains('checked');
        this.jsEditor = monaco.editor.create(document.getElementById('jsEditor'), editorOptions);
        this.jsEditor.setValue(oldCode);
        this.jsEditor.onKeyUp(function () {
            this.parent.utils.markDirty();
        }.bind(this));
    };

    /**
     * Format the code in the editor
     */
    formatCode () {
        this.jsEditor.getAction('editor.action.formatDocument').run();
    };

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

    /**
     * Get the code in the editor
     * @param {Function} callBack : Function that will be called after retrieving the code.
     */
    getRunCode(callBack) {
        if (this.parent.settingsPG.ScriptLanguage == "JS")
            callBack(this.jsEditor.getValue());
        else if (this.parent.settingsPG.ScriptLanguage == "TS") {
            this.triggerCompile(this.JsEditor.getValue(), function (result) {
                callBack(result + "var createScene = function() { return Playground.CreateScene(engine, engine.getRenderingCanvas()); }")
            });
        }
    };

    /**
     * Usefull function for TypeScript code
     * @param {*} codeValue 
     * @param {*} callback 
     */
    triggerCompile(codeValue, callback) {
        if (this.compilerTriggerTimeoutID !== null) {
            window.clearTimeout(this.compilerTriggerTimeoutID);
        }
        this.compilerTriggerTimeoutID = window.setTimeout(function () {
            try {

                var output = this.transpileModule(codeValue, {
                    module: ts.ModuleKind.AMD,
                    target: ts.ScriptTarget.ES5,
                    noLib: true,
                    noResolve: true,
                    suppressOutputPathCheck: true
                });
                if (typeof output === "string") {
                    callback(output);
                }
            }
            catch (e) {
                this.parent.utils.showError(e.message, e);
            }
        }.bind(this), 100);
    };
    
    /**
     * Usefull function for TypeScript code
     * @param {*} input 
     * @param {*} options 
     */
    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;
    }
};