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// Gulp 4
const { src, dest, watch, series, parallel } = require('gulp');
// Importing all the Gulp-related packages we want to use
const sourcemaps = require('gulp-sourcemaps');
const sass = require('gulp-sass');
var sassGlob = require('gulp-sass-glob');
const concat = require('gulp-concat');
const uglify = require('gulp-uglify');
const postcss = require('gulp-postcss');
const autoprefixer = require('autoprefixer');
const cssnano = require('cssnano');
var replace = require('gulp-replace');
const argv = require('yargs').argv;
var gs = require('glob-stream');
const babel = require('gulp-babel');
var rename = require('gulp-rename');

var is_production = (argv.production === undefined) ? false : true;
var project = { // build settings
  vendor: {
    files_to_watch: ['./vendor/**/*'],
    styles: ['./vendor/**/*.css'],
    scripts: ['./vendor/**/*.js'],
  },
  styles: {
    files_to_watch: [
      './sass/**/*.scss',
      './js/components/**/*.scss',
    ],
    entry: './sass/style.scss',
    dest: './../assets/',
  },
  scripts: {
    files_to_watch: [
      './js/**/*.js',
      './js/components/**/*.html'
    ],
    files: [
      './js/_templates.js',
      './js/services/*.js',
      './js/components/**/*.js',
      './js/directives/*.js',
      './js/_settings.js',
      './js/_global.js',
      './js/**/*.js',
    ],
    templates: [
      './js/components/**/*.html'
    ],
    dest: './../assets/',
  }
};

function scssTask(){    
    return src(project.styles.entry)
    	.pipe(rename('./sass/_sleepless.min.scss'))
    	.pipe(sassGlob())
        .pipe(sourcemaps.init())
        .pipe(sass())
        .pipe(postcss([ autoprefixer(), cssnano() ]))
        .pipe(sourcemaps.write('.'))
        .pipe(dest(project.styles.dest)
    );
}

function jsTask(){
    return src(project.scripts.files, { allowEmpty: true})
        .pipe(concat('_sleepless.bundle.js'))
        .pipe(babel({
        			presets: ['@babel/preset-env']
        		}))
        .pipe(uglify())
        .pipe(dest(project.scripts.dest)
    );
}

function watchSass(){
    watch(
        ['./sass/**/*.scss'],
        series(scssTask)
    );
}

function watchJs(){
    watch(
        ['./js/**/*.js'],
        series(jsTask)
    );
}

exports.default = series(
    parallel(scssTask, jsTask), 
    parallel(watchSass, watchJs));