const { src, dest, series } = require('gulp');
const autoprefixer = require('gulp-autoprefixer');
const minify = require('gulp-minify');
const cleanCSS = require('gulp-clean-css');
const fs = require('fs');
const del = require('del');
const rename = require('gulp-rename');
const htmlMin = require('gulp-htmlmin');
const sass = require('gulp-sass');
const replace = require('gulp-replace');
//
function html() {
	return src('./src/component.html')
		.pipe(htmlMin({ collapseWhitespace: true }))
		.pipe(rename('./src/component.min.html'))
		.pipe(dest('./'));
}
function css() {
	return src('./src/scss/component.scss')
		.pipe(sass())
		.pipe(autoprefixer())
		.pipe(cleanCSS())
		.pipe(rename('./src/css/component.min.css'))
		.pipe(dest('./'));
}
function js() {
	const css = fs.readFileSync('./src/css/component.min.css');
	const html = fs.readFileSync('./src/component.min.html');
	return src('./src/mailymaily.js')
		.pipe(replace(/___css_inserter___/g, css))
		.pipe(replace(/___html_inserter___/g, html))
		.pipe(minify({ noSource: true }))
		.pipe(rename('mailymaily.min.js'))
		.pipe(dest('./dist'));
}
const clean = () => del([ './src/component.min.html', './src/css/' ]);
const prebuild = () => del([ './dist/' ]);
exports.default = series(prebuild, html, css, js, clean);