text: 'use strict';
  
  var gulp = require('gulp'),
    gutil = require('gulp-util'),
    clean = require('gulp-clean'),
    gulpSequence = require('gulp-sequence'),
    jshint = require('gulp-jshint'),
    concat = require('gulp-concat'),
    imagemin = require('gulp-imagemin'),
    minifyCss = require('gulp-minify-css'),
    minifyHtml = require('gulp-minify-html'),
    uglify = require('gulp-uglify'),
    rev = require('gulp-rev'),
    replace = require('gulp-replace'),
    usemin = require('gulp-usemin'),
    version = 'v' + require('./package.json').version,
    cdnHost = require('./package.json').cdnHost;
  
  gulp.task('clean', function () {
    return gulp.src(['static/dist/*', 'static/cdn/*'])
      .pipe(clean({force: true}));
  });
  
  gulp.task('jshint', function () {
    return gulp.src(['*.js', 'api/*.js', 'dao/*.js', 'lib/*.js', 'patch/*.js', 'static/src/js/*.js'])
      .pipe(jshint())
      .pipe(jshint.reporter());
  });
  
  gulp.task('css', function () {
    return gulp.src([
        'static/bower_components/pure/pure.css',
        'static/bower_components/toastr/toastr.css',
        'static/bower_components/font-awesome/css/font-awesome.css',
        'static/src/css/prettify.css',
        'static/src/css/main.css'
      ])
      .pipe(concat('app.css'))
      .pipe(replace('VERSION', version))
      .pipe(gulp.dest('static/dist/css/'));
  });
  
  gulp.task('js-lib', function () {
    return gulp.src([
      'static/bower_components/jquery/dist/jquery.js',
      'static/bower_components/angular/angular.js',
      'static/bower_components/angular-animate/angular-animate.js',
      'static/bower_components/angular-cookies/angular-cookies.js',
      'static/bower_components/angular-resource/angular-resource.js',
      'static/bower_components/angular-route/angular-route.js',
      'static/bower_components/angular-i18n/angular-locale_zh-cn.js',
      'static/bower_components/angular-ui-utils/validate.js',
      'static/bower_components/angular-file-upload/angular-file-upload.js',
      'static/bower_components/google-code-prettify/src/prettify.js',
      'static/bower_components/marked/lib/marked.js',
      'static/bower_components/toastr/toastr.js',
      'static/bower_components/crypto-js/build/rollups/hmac-sha256.js',
      'static/bower_components/utf8/utf8.js',
      'static/bower_components/store2/dist/store2.js',
      'static/bower_components/jsonkit/jsonkit.js',
      'static/src/js/lib/bootstrap.js',
      'static/src/js/lib/Markdown.Editor.js',
      'static/src/js/lib/sanitize.js'
      ])
      .pipe(concat('lib.js'))
      .pipe(gulp.dest('static/dist/js/'));
  });
  
  gulp.task('js-app', function () {
    return gulp.src([
        'static/src/js/app.js',
        'static/src/js/locale_zh-cn.js',
        'static/src/js/router.js',
        'static/src/js/tools.js',
        'static/src/js/services.js',
        'static/src/js/filters.js',
        'static/src/js/directives.js',
        'static/src/js/controllers.js'
      ])
      .pipe(concat('app.js'))
      .pipe(gulp.dest('static/dist/js/'));
  });
  
  
  gulp.task('html', function () {
    return gulp.src('static/src/**/*.html')
      .pipe(replace('VERSION', version))
      .pipe(gulp.dest('static/dist/'));
  });
  
  gulp.task('md', function () {
    return gulp.src('static/src/md/*')
      .pipe(gulp.dest('static/dist/md'));
  });
  
  
  gulp.task('image', function () {
    return gulp.src('static/src/img/*')
      .pipe(gulp.dest('static/dist/img/'));
  });
  
  gulp.task('ico', function () {
    return gulp.src('static/src/*.ico')
      .pipe(gulp.dest('static/dist/'));
  });
  
  gulp.task('font', function () {
    return gulp.src('static/bower_components/font-awesome/fonts/*')
      .pipe(gulp.dest('static/dist/fonts/'));
  });
  
  gulp.task('cdn', function () {
    return gulp.src(['static/dist/**/*', '!static/dist/js/*', '!static/dist/css/*'])
      .pipe(gulp.dest('static/cdn/'));
  });
  
  gulp.task('usemin', function () {
    return gulp.src('static/dist/index.html')
      .pipe(replace(/\/static\/(js|css)/g, '$1'))
      .pipe(usemin({
        css: [minifyCss({keepSpecialComments: 0}), rev()],
        // html: [minifyHtml({empty: true})],
        js: [uglify(), rev()]
      }))
      .pipe(replace('../cdn', cdnHost))
      .pipe(gulp.dest('static/cdn/'));
  });
  
  gulp.task('default', gulpSequence('jshint', 'clean', ['css', 'font', 'js-lib', 'js-app', 'html', 'md', 'image', 'ico']));
  
  gulp.task('build', gulpSequence('default', 'cdn', 'usemin'));
  