/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/
'use strict';

import * as mode from './mode';

import Emitter = monaco.Emitter;
import IEvent = monaco.IEvent;
import IDisposable = monaco.IDisposable;

declare var require:<T>(moduleId:[string], callback:(module:T)=>void)=>void;

// --- TypeScript configuration and defaults ---------

export class LanguageServiceDefaultsImpl implements monaco.languages.typescript.LanguageServiceDefaults {

	private _onDidChange = new Emitter<monaco.languages.typescript.LanguageServiceDefaults>();
	private _extraLibs: { [path: string]: string };
	private _compilerOptions: monaco.languages.typescript.CompilerOptions;
	private _diagnosticsOptions: monaco.languages.typescript.DiagnosticsOptions;

	constructor(compilerOptions: monaco.languages.typescript.CompilerOptions, diagnosticsOptions: monaco.languages.typescript.DiagnosticsOptions) {
		this._extraLibs = Object.create(null);
		this.setCompilerOptions(compilerOptions);
		this.setDiagnosticsOptions(diagnosticsOptions);
	}

	get onDidChange(): IEvent<monaco.languages.typescript.LanguageServiceDefaults>{
		return this._onDidChange.event;
	}

	get extraLibs(): { [path: string]: string; } {
		return Object.freeze(this._extraLibs);
	}

	addExtraLib(content: string, filePath?: string): IDisposable {
		if (typeof filePath === 'undefined') {
			filePath = `ts:extralib-${Date.now()}`;
		}

		if (this._extraLibs[filePath]) {
			throw new Error(`${filePath} already a extra lib`);
		}

		this._extraLibs[filePath] = content;
		this._onDidChange.fire(this);

		return {
			dispose: () => {
				if (delete this._extraLibs[filePath]) {
					this._onDidChange.fire(this);
				}
			}
		};
	}

	get compilerOptions(): monaco.languages.typescript.CompilerOptions {
		return this._compilerOptions;
	}

	setCompilerOptions(options: monaco.languages.typescript.CompilerOptions): void {
		this._compilerOptions = options || Object.create(null);
		this._onDidChange.fire(this);
	}

	get diagnosticsOptions(): monaco.languages.typescript.DiagnosticsOptions {
		return this._diagnosticsOptions;
	}

	setDiagnosticsOptions(options: monaco.languages.typescript.DiagnosticsOptions): void {
		this._diagnosticsOptions = options || Object.create(null);
		this._onDidChange.fire(this);
	}
}

// --- BEGIN enums copied from typescript to prevent loading the entire typescriptServices ---

enum ModuleKind {
	None = 0,
	CommonJS = 1,
	AMD = 2,
	UMD = 3,
	System = 4,
	ES6 = 5,
	ES2015 = 5,
}

enum JsxEmit {
	None = 0,
	Preserve = 1,
	React = 2,
}

enum NewLineKind {
	CarriageReturnLineFeed = 0,
	LineFeed = 1,
}

enum ScriptTarget {
	ES3 = 0,
	ES5 = 1,
	ES6 = 2,
	ES2015 = 2,
	Latest = 2,
}

enum ModuleResolutionKind {
	Classic = 1,
	NodeJs = 2,
}

// --- END enums copied from typescript to prevent loading the entire typescriptServices ---

const typescriptDefaults = new LanguageServiceDefaultsImpl(
	{ allowNonTsExtensions: true, target: ScriptTarget.Latest },
	{ noSemanticValidation: false, noSyntaxValidation: false });

const javascriptDefaults = new LanguageServiceDefaultsImpl(
	{ allowNonTsExtensions: true, allowJs: true, target: ScriptTarget.Latest },
	{ noSemanticValidation: true, noSyntaxValidation: false });


// Export API
function createAPI(): typeof monaco.languages.typescript {
	return {
		ModuleKind: ModuleKind,
		JsxEmit: JsxEmit,
		NewLineKind: NewLineKind,
		ScriptTarget: ScriptTarget,
		ModuleResolutionKind: ModuleResolutionKind,
		typescriptDefaults: typescriptDefaults,
		javascriptDefaults: javascriptDefaults
	}
}
monaco.languages.typescript = createAPI();

// --- Registration to monaco editor ---

function withMode(callback:(module:typeof mode)=>void): void {
	require<typeof mode>(['vs/language/typescript/src/mode'], callback);
}

monaco.languages.register({
	id: 'typescript',
	extensions: ['.ts'],
	aliases: ['TypeScript', 'ts', 'typescript'],
	mimetypes: ['text/typescript']
});
monaco.languages.onLanguage('typescript', () => {
	withMode((mode) => mode.setupTypeScript(typescriptDefaults));
});

monaco.languages.register({
	id: 'javascript',
	extensions: ['.js', '.es6'],
	firstLine: '^#!.*\\bnode',
	filenames: ['jakefile'],
	aliases: ['JavaScript', 'javascript', 'js'],
	mimetypes: ['text/javascript'],
});
monaco.languages.onLanguage('javascript', () => {
	withMode((mode) => mode.setupJavaScript(javascriptDefaults));
});