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// Load plugins
var gulp = require('gulp'),
    sass = require('gulp-ruby-sass'),
    autoprefixer = require('gulp-autoprefixer'),
    minifycss = require('gulp-minify-css'),
    jshint = require('gulp-jshint'),
    uglify = require('gulp-uglify'),
    imagemin = require('gulp-imagemin'),
    rename = require('gulp-rename'),
    concat = require('gulp-concat'),
    notify = require('gulp-notify'),
    cache = require('gulp-cache'),
    livereload = require('gulp-livereload'),
    del = require('del');

gulp.task('styles', function() {
    // Process Sass
    return gulp.src('src/styles/main.scss')
    .pipe(sass({ style: 'expanded' }))
    .pipe(autoprefixer('last 2 version', 'safari 5', 'ie 8', 'ie 9', 'opera 12.1', 'ios 6', 'android 4'))
    .pipe(gulp.dest('dist/assets/css'))
    .pipe(rename({suffix: '.min'}))
    .pipe(minifycss())
    .pipe(gulp.dest('dist/assets/css'))
    .pipe(notify({ message: 'Styles task complete' }));
});

gulp.task('scripts', function() {
    // JSHint, concat, and minify JavaScript
    return gulp.src('src/js/**/*.js')
    .pipe(jshint('.jshintrc'))
    .pipe(jshint.reporter('default'))
    .pipe(concat('main.js'))
    .pipe(gulp.dest('dist/assets/js'))
    .pipe(rename({suffix: '.min'}))
    .pipe(uglify())
    .pipe(gulp.dest('dist/assets/js'))
    .pipe(notify({ message: 'Scripts task complete' }));
});

gulp.task('images', function() {
    // Image compression
    return gulp.src('src/images/**/*')
    //.pipe(imagemin({ optimizationLevel: 3, progressive: true, interlaced: true }))
    .pipe(cache(imagemin({ optimizationLevel: 5, progressive: true, interlaced: true })))
    .pipe(gulp.dest('dist/assets/img'))
    .pipe(notify({ message: 'Images task complete' }));
});

gulp.task('clean', function(cb) {
    // Clean up destination folders (before other tasks are run)
    // Use a callback (cb) to ensure the task finishes before exiting.
    del(['dist/assets/css', 'dist/assets/js', 'dist/assets/img'], cb);
});

// Watch
gulp.task('watch', function() {
  // Watch .scss files
  gulp.watch('src/styles/**/*.scss', ['styles']);
 
  // Watch .js files
  gulp.watch('src/scripts/**/*.js', ['scripts']);
 
  // Watch image files
  gulp.watch('src/images/**/*', ['images']);
 
  // Create LiveReload server
  livereload.listen();
});

gulp.task('default', ['clean'], function() {
    gulp.start('styles', 'scripts', 'images');
});