/**
 *
 *  Material Design Styleguide
 *  Copyright 2015 Google Inc. All rights reserved.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License
 *
 */

'use strict';

// Include Gulp & Tools We'll Use
var gulp = require('gulp');
var $ = require('gulp-load-plugins')();
var del = require('del');
var runSequence = require('run-sequence');
var browserSync = require('browser-sync');
var reload = browserSync.reload;
var fs = require('fs');
var path = require('path');
var pkg = require('./package.json');
var banner = ['/**',
  ' * <%= pkg.name %> - <%= pkg.description %>',
  ' * @version v<%= pkg.version %>',
  ' * @link <%= pkg.homepage %>',
  ' * @license <%= pkg.license %>',
  ' */',
  ''].join('\n');

var AUTOPREFIXER_BROWSERS = [
  'ie >= 10',
  'ie_mob >= 10',
  'ff >= 30',
  'chrome >= 34',
  'safari >= 7',
  'opera >= 23',
  'ios >= 7',
  'android >= 4.4',
  'bb >= 10'
];

// Lint JavaScript
gulp.task('jshint', function () {
  return gulp.src('src/**/*.js')
    .pipe(reload({stream: true, once: true}))
    .pipe($.jshint())
    .pipe($.jshint.reporter('jshint-stylish'))
    .pipe($.if(!browserSync.active, $.jshint.reporter('fail')));
});

// Optimize Images
// TODO: Update image paths in final CSS to match root/images
gulp.task('images', function () {
  return gulp.src('src/**/*.{svg,png,jpg}')
    .pipe($.cache($.imagemin({
      progressive: true,
      interlaced: true
    })))
    .pipe(gulp.dest('./images'))
    .pipe($.size({title: 'images'}));
});


// Compile and Automatically Prefix Stylesheets (dev)
gulp.task('styles:dev', function () {
  return gulp.src([
    'src/**/**/*.scss'
  ])
    .pipe($.changed('.tmp/styles', {extension: '.css'}))
    .pipe($.sass({
      precision: 10,
      onError: console.error.bind(console, 'Sass error:')
    }))
    .pipe($.autoprefixer(AUTOPREFIXER_BROWSERS))
    .pipe(gulp.dest('.tmp/styles'))
    .pipe($.size({title: 'styles'}));
});

// Compile and Automatically Prefix Stylesheets (production)
gulp.task('styles', function () {
  // For best performance, don't add Sass partials to `gulp.src`
  return gulp.src([
    'src/styleguide.scss'
  ])
    //.pipe($.changed('.tmp/styles', {extension: '.css'}))
    .pipe($.sass({
      precision: 10,
      onError: console.error.bind(console, 'Sass error:')
    }))
    .pipe($.autoprefixer(AUTOPREFIXER_BROWSERS))
    .pipe(gulp.dest('.tmp'))
    // Concatenate Styles
    .pipe($.concat('material.css'))
    .pipe($.header(banner, {pkg: pkg}))
    .pipe(gulp.dest('./css'))
    // Minify Styles
    .pipe($.if('*.css', $.csso()))
    .pipe($.concat('material.min.css'))
    //.pipe($.header(banner, {pkg: pkg}))
    .pipe(gulp.dest('./css'))
    .pipe($.size({title: 'styles'}));
});

// Concatenate And Minify JavaScript
gulp.task('scripts', function () {
  var sources = [
    // Component handler
    'src/wskComponentHandler.js',
    // Polyfills/dependencies
    'src/third_party/**/*.js',
    // Base components
    'src/animation/animation.js',
    'src/button/button.js',
    'src/checkbox/checkbox.js',
    'src/column-layout/column-layout.js',
    'src/icon-toggle/icon-toggle.js',
    'src/item/item.js',
    'src/radio/radio.js',
    'src/slider/slider.js',
    'src/spinner/spinner.js',
    'src/switch/switch.js',
    'src/tabs/tabs.js',
    'src/textfield/textfield.js',
    'src/tooltip/tooltip.js',
    // Complex components (which reuse base components)
    'src/layout/layout.js',
    // And finally, the ripples
    'src/ripple/ripple.js'
  ];
  return gulp.src(sources)
    .pipe($.sourcemaps.init())
    // Concatenate Scripts
    .pipe($.concat('material.js'))
    .pipe($.header(banner, {pkg: pkg}))
    .pipe(gulp.dest('./js'))
    // Minify Scripts
    .pipe($.uglify({preserveComments: 'some', sourceRoot: '.', sourceMapIncludeSources: true}))
    .pipe($.concat('material.min.js'))
    // Write Source Maps
    .pipe($.sourcemaps.write('./'))
    .pipe(gulp.dest('./js'))
    .pipe($.size({title: 'scripts'}));
});

// Run Unit Tests
gulp.task('mocha', function () {
  return gulp.src('./test/*.js', { read: false })
    .pipe(mocha({reporter: 'list'}))
});

// Clean Output Directory
gulp.task('clean', del.bind(null, ['.tmp', 'css/*', 'js/*', '!dist/.git'], {dot: true}));

// Watch Files For Changes & Reload
gulp.task('serve', ['styles:dev'], function () {
  browserSync({
    notify: false,
    // Customize the BrowserSync console logging prefix
    logPrefix: 'WSK',
    server: ['.tmp', 'src', '.tmp/styles']
  });

  gulp.watch(['src/**/**/**/*.html'], reload);
  gulp.watch(['src/**/**/*.{scss,css}'], ['styles:dev', reload]);
  gulp.watch(['src/**/*.js'], ['jshint']);
});

// Build and serve the output from the dist build
gulp.task('serve:dist', ['default'], function () {
  browserSync({
    notify: false,
    logPrefix: 'WSK',
    server: './',
    baseDir: "src"
  });
});

// Build Production Files, the Default Task
gulp.task('default', ['clean'], function (cb) {
  runSequence(
    'styles',
    ['jshint', 'scripts', 'images'],
    cb);
});