// Requires
const gulp = require('gulp');
const prefix = require('gulp-autoprefixer');
const sass = require('gulp-sass');
const browserSync = require('browser-sync');

/* ----------------------------------------- */
/*  Compile Sass
/* ----------------------------------------- */

// Small error handler helper function.
function handleError(err) {
  console.log(err.toString());
  this.emit('end');
}

const SYSTEM_SCSS = ["system/styles/conf/**/*.scss"];
function compileScss() {
  // Configure options for sass output. For example, 'expanded' or 'nested'
  let options = {
    outputStyle: 'compressed'
  };
  return gulp.src(SYSTEM_SCSS)
    .pipe(
      sass(options)
        .on('error', handleError)
    )
    .pipe(prefix({
      cascade: false
    }))
    .pipe(gulp.dest("system/styles"))
    .pipe(browserSync.reload({
      stream: true
    }))
}
const css = gulp.series(compileScss);

/* ----------------------------------------- */
/*  Watch Updates
/* ----------------------------------------- */

function watchUpdates() {
  gulp.watch("system/styles/scss/**/*.scss", css);
}

/* ----------------------------------------- */
/*  BrowserSync
/* ----------------------------------------- */

function bSync() {
  browserSync({
    server: {
      baseDir: 'system/styles'
    },
  })
}

/* ----------------------------------------- */
/*  Export Tasks
/* ----------------------------------------- */

exports.default = gulp.series(
  compileScss,
  watchUpdates,
  bSync
);
exports.css = css;