/******************************************************
 *             ----前端工程自动化构建----             *
 *                                                    *
 *      @author dai-siki同学 < 851733175@qq.com >     *
 ******************************************************/

// import package
const $ = require('gulp-load-plugins')(),
	webpack = require('webpack-stream'),
	named = require('vinyl-named'),
	browserSync = require('browser-sync').create(),
	reload = browserSync.reload,
	gulp = require('gulp');

/** 开发
 -------------------------------------------------------------*/

gulp.task('css', function() {
	gulp.src('./scss/*.scss').pipe($.sass()).pipe($.autoprefixer('last 10 version')).pipe(gulp.dest('./'));
});

// jS task
gulp.task('js', function() {
	var webpack_config = {
		module: {
			loaders: [
				{
					test: /\.js$/,
					loader: 'babel',
					query: {
						presets: [
							'es2015', 'stage-3'
						],
						plugins: [
							['transform-runtime', {
								helpers: false,
								polyfill: false,
								regenerator: true
							}]
						]
					}
				}, {
					test: /\.css$/,
					loaders: ['style', 'css']
				}, {
					test: /\.json$/,
					loaders: ['json']
				}, {
					test: /\.(scss|sass)$/,
					loaders: ['style', 'css', 'sass']
				}, {
					test: /\.(html|tpl)$/,
					loaders: ['html']
				}, {
					test: /\.vue$/,
					loaders: ['vue']
				}
			]
		}
	};

	gulp.src('./example/demo.js')
		.pipe($.plumber({errorHandler: _errrHandler}))
		.pipe(named(function() {
			return 'demo-src';
		}))
		.pipe(webpack(webpack_config))/*.pipe($.uglify())*/
	    .pipe(gulp.dest('./example'));

	gulp.src('./example-2/demo.js')
		.pipe($.plumber({errorHandler: _errrHandler}))
		.pipe(named(function() {
			return 'demo-src';
		}))
		.pipe(webpack(webpack_config))/*.pipe($.uglify())*/
	    .pipe(gulp.dest('./example-2'));
});

gulp.task('serve', function() {
	browserSync.init({
		server: {
			baseDir: './'
		}
	});
	gulp.watch([
		'./example-2/demo.js','./example/demo.js', './*.vue', './*.css'
	], ['js']);
	gulp.watch(['./scss/*.scss'], ['css']);
	gulp.watch([
		'./example/**/*.html', './example/demo-src.js', './example-2/**/*.html', './example-2/demo-src.js'
	], function() {
		reload();
	});
});

gulp.task('default', ['serve']);

/** 辅助函数
 -------------------------------------------------------------*/
//错误提示
function _errrHandler(e) {
	$.util.beep();
	$.util.log(e);
}