browserSync = require('browser-sync')
gulp        = require('gulp')
coffee      = require("gulp-coffee")
sass        = require('gulp-sass')
zip         = require('gulp-zip')
concat      = require('gulp-concat')

reload = browserSync.reload;

# Copy assets over without touching them
assets = (target) ->
  return () ->
    return gulp.src([
      'img/*.png',
      'img/*.jpeg',
      'img/*.jpg'
      ]).pipe(gulp.dest(target))

gulp.task('assets', assets('./build'));

gulp.task('sass', function () {
  gulp.src('sass/main.scss')
    .pipe(sass().on('error', sass.logError))
    .pipe(gulp.dest('./build/css'));
});

gulp.task('html', html('./build'));

gulp.task('concatCoffee', function() {
  return gulp.src([
      './game/begin.coffee',
      './game/story.coffee',
      './game/init.coffee',
    ])
    .pipe(concat('./main.coffee'))
    .pipe(gulp.dest('./build/game'));
});

gulp.task('coffee', ['concatCoffee'])

bundler.on('update', coffee);
bundler.on('log', gutil.log); # Output build logs to terminal

gulp.task('build', ['html', 'img', 'sass', 'coffee'])

gulp.task('serve', ['build'], () ->
  browserSync({
    server: {
      baseDir: 'build'
    }
  })

  sassListener = () ->
    reload('./build/css/main.css');

  gulp.watch(['./html/*.html'], ['html']);
  gulp.watch(['./sass/*.scss'], ['sass']);
  gulp.watch(['./build/css/main.css'], sassListener);
  gulp.watch(['./img/*.png', './img/*.jpeg', './img/*.jpg'], ['img']);
  gulp.watch(['./game/*.coffee'], ['coffee']);

  gulp.watch(
    ['./build/game/bundle.js', './build/img/*', './build/index.html'],
    browserSync.reload)
})

/* Distribution tasks */

var undumDistBundler = browserify();
undumDistBundler.require('undum-commonjs');

gulp.task('undum-dist', function () {
  return undumDistBundler.bundle().pipe(source('undum.js'))
    .pipe(buffer())
    .pipe(uglify())
    .pipe(gulp.dest('./dist/game'));
});

gulp.task('html-dist', html('./dist'));
gulp.task('img-dist', img('./dist/img'));
gulp.task('legal-dist', function () {
  return gulp.src(['LICENSE.txt'])
         .pipe(gulp.dest("./dist"));
});

gulp.task('sass-dist', function () {
  return gulp.src('./sass/main.scss')
        .pipe(sass({outputStyle: 'compressed'}))
        .pipe(gulp.dest('./dist/css'));
});

var distBundler = browserify({
  debug: false,
  entries: ['./build/game/main.coffee'],
  transform: ['coffeeify']
});

distBundler.external('undum-commonjs');

gulp.task('coffee-dist', ['undum-dist', 'concatCoffee'], function () {
  return distBundler.bundle()
        .pipe(source('bundle.js'))
        .pipe(buffer())
        .pipe(uglify())
        .on('error', gutil.log)
        .pipe(gulp.dest('./dist/game'));
});

gulp.task('dist', ['html-dist', 'img-dist', 'sass-dist', 'coffee-dist', 'legal-dist'],
  function () {
    return;
});

gulp.task('zip', ['dist'], function () {
  return gulp.src('dist/**')
    .pipe(zip('dist.zip'))
    .pipe(gulp.dest('.'));
});