// Require all those npm-modules

var	gulp 			= require('gulp'),
	sass 			= require('gulp-sass'),
	autoprefixer 	= require('gulp-autoprefixer'),
	cssmin 			= require('gulp-cssmin'),
	jshint 			= require('gulp-jshint'),
	uglify 			= require('gulp-uglify'),
	imagemin 		= require('gulp-imagemin'),
	pngcrush 		= require('imagemin-pngcrush'),
	rename 			= require('gulp-rename'),
	clean 			= require('gulp-rimraf'),
	concat 			= require('gulp-concat'),
	notify 			= require('gulp-notify'),
	cache 			= require('gulp-cache'),
	livereload 		= require('gulp-livereload');

// render scss
gulp.task('styles', function() {
	gulp.src('./src/scss/main.scss')
		.pipe(sass({ style: 'expanded' }))
		.pipe(autoprefixer('last 2 version', 'IE 9', 'safari 5', 'Firefox ESR', 'opera 12.1', 'ios 6', 'android 4', 'BlackBerry 10'))
		.pipe(gulp.dest('./css'))
		.pipe(rename({suffix: '.min'}))
		.pipe(cssmin())
		.pipe(gulp.dest('./css'))
		.pipe(notify({ message: 'Styles task complete' }));
});

// compress images
gulp.task('images', function() {
	gulp.src('./src/img/*')
		.pipe(cache(imagemin({ optimizationLevel: 3, progressive: true, interlaced: true })))
		.pipe(gulp.dest('./img/'))
		.pipe(notify({ message: 'Images task complete' }));
});

// clean the folders
gulp.task('clean', function() {
	gulp.src(['./css/*', './js/*', './img/*'], {read: false})
		.pipe(clean());
});

// do the javascript-dance
gulp.task('scripts', function() {
	gulp.src('./src/js/**/*.js')
		.pipe(concat('main.js'))
		.pipe(gulp.dest('./js'))
		.pipe(rename({suffix: '.min'}))
		.pipe(uglify())
		.pipe(gulp.dest('./js'))
		.pipe(notify({ message: 'Scripts task complete' }));
});

// watch it while working
gulp.task('watch', function() {
	// Watch .scss files
	gulp.watch('src/scss/**/*.scss', ['styles']);

	// Watch .js files
	gulp.watch('src/js/**/*.js', ['scripts']);

	// Watch image files
	gulp.watch('src/img/**/*', ['images']);
});

// default: all of them! \o/
gulp.task('default', ['clean'], function() {
	gulp.start('styles', 'scripts', 'images');
});