const gulp = require('gulp');
const imagemin = require('gulp-imagemin');
const uglify = require('gulp-uglify');
const sass = require('gulp-sass');
const concat = require('gulp-concat');

/*
 * Toplevelfunction
 * gulp.task
 * gulp.src
 * gulp.dest
 * gulp.watch
 */

// Logs Message
gulp.task('message', function () {
    return console.log('Gulp is running...');
});

// Copy All HTML files
gulp.task('copyHtml', function () {
    gulp.src('app/*.html')
        .pipe(gulp.dest('dist'));
});

// Optimize Images
gulp.task('imageMin', () =>
    gulp.src('app/img/*')
        .pipe(imagemin())
        .pipe(gulp.dest('dist/images'))
);

// Minify JS
gulp.task('minify', function () {
    gulp.src('app/scripts/*.js')
        .pipe(uglify())
        .pipe(gulp.dest('dist/js'));
});

// Compile Sass
gulp.task('sass', function () {
    gulp.src('app/sass/*.scss')
        .pipe(sass().on('error', sass.logError))
        .pipe(gulp.dest('dist/css'));
});

// Scripts
gulp.task('scripts', function () {
    gulp.src('app/scripts/*.js')
        .pipe(concat('app.js'))
        .pipe(uglify())
        .pipe(gulp.dest('dist/js'));
});

gulp.task('default', ['message', 'copyHtml', 'imageMin', 'sass', 'scripts']);
/*
gulp.task('watch', function () {
    gulp.watch('app/scripts/*.js', ['scripts']);
    gulp.watch('app/img/*', ['imageMin']);
    gulp.watch('app/sass/*.scss', ['sass']);
    gulp.watch('app/*.html', ['copyHtml']);
});*/