var gulp = require('gulp');
var es = require('event-stream');
var pj = require('./package.json');
var $ = require('gulp-load-plugins')();
var concat = require('gulp-concat');
var path = require('path');
var http = require('http');
var livereload = require('gulp-livereload');
var st = require('st');
var less = require('gulp-less');
var del = require('del');
var runSequence = require('run-sequence');
var oghliner = require('oghliner');
var gulpServiceWorker = require('gulp-serviceworker');

// The generated file is being created at src
// so it can be fetched by usemin.
gulp.task('templates', function() {
  return gulp.src('app/partials/**/*.html')
    .pipe($.angularTemplatecache('templates.js', {
      root: 'partials',
      module: 'myApp.templates',
      standalone: true
    }))
    .pipe(gulp.dest('app/js'));
});

gulp.task('usemin', function() {
  return gulp.src(['app/index.html', 'app/badbrowser.html'])
    .pipe($.usemin({
      html: [$.minifyHtml({empty: true})],
      js: ['concat', $.ngAnnotate(), $.uglify({outSourceMap: false})],
      css: ['concat', $.minifyCss({compatibility: true, keepBreaks: true})]
    }))
    .pipe(gulp.dest('dist'));
});

// ulimit -n 10240 on OS X
gulp.task('imagemin', function() {
  return gulp.src(['app/img/**/*', '!app/img/screenshot*', '!app/img/*.wav'])
    .pipe($.imagemin())
    .pipe(gulp.dest('dist/img'));
});

gulp.task('less', function () {
  gulp.src('app/less/*.less')
    .pipe(less({
      paths: [path.join(__dirname, 'less', 'includes')]
    }))
    .pipe(gulp.dest('app/css'));
});

gulp.task('copy-images', function() {
  return gulp.src(['app/img/**/*', '!app/img/screenshot*', '!app/img/*.wav'])
    .pipe(gulp.dest('dist/img'));
});

gulp.task('copy', function() {
  return es.concat(
    gulp.src(['app/favicon.ico', 'app/favicon_unread.ico', 'app/manifest.webapp', 'app/manifest.json', 'app/**/*worker.js'])
      .pipe(gulp.dest('dist')),
    gulp.src(['app/img/**/*.wav'])
      .pipe(gulp.dest('dist/img')),
    // gulp.src(['app/fonts/*'])
    //   .pipe(gulp.dest('dist/fonts')),
    gulp.src(['app/js/lib/polyfill.js', 'app/js/lib/bin_utils.js'])
      .pipe(gulp.dest('dist/js/lib')),
    gulp.src('app/vendor/closure/long.js')
      .pipe(gulp.dest('dist/vendor/closure')),
    gulp.src(['app/css/desktop.css', 'app/css/mobile.css'])
      .pipe(gulp.dest('dist/css')),
    gulp.src('app/vendor/jsbn/jsbn_combined.js')
      .pipe(gulp.dest('dist/vendor/jsbn')),
    gulp.src('app/vendor/leemon_bigint/bigint.js')
      .pipe(gulp.dest('dist/vendor/leemon_bigint')),
    gulp.src('app/vendor/rusha/rusha.js')
      .pipe(gulp.dest('dist/vendor/rusha')),
    gulp.src('app/vendor/cryptoJS/crypto.js')
      .pipe(gulp.dest('dist/vendor/cryptoJS')),
    gulp.src(['app/nacl/mtproto_crypto.pexe', 'app/nacl/mtproto_crypto.nmf'])
      .pipe(gulp.dest('dist/nacl/')),
    gulp.src('app/js/background.js')
      .pipe(gulp.dest('dist/js'))
  );
});

gulp.task('copy-locales', function() {
  var langpackSrc = [],
      ngSrc = [];

  pj.locales.forEach(function (locale) {
    langpackSrc.push('app/js/locales/' + locale + '.json');
    ngSrc.push('app/vendor/angular/i18n/angular-locale_' + locale + '.js');
  });
  return es.concat(
    gulp.src(langpackSrc)
      .pipe(gulp.dest('dist/js/locales/')),
    gulp.src(ngSrc)
      .pipe(gulp.dest('dist/vendor/angular/i18n/'))
  );
});

gulp.task('compress-dist', ['build'], function() {
  return gulp.src('**/*', {cwd:  path.join(process.cwd(), '/dist')})
    .pipe($.zip('webogram_v' + pj.version + '.zip'))
    .pipe(gulp.dest('releases'));
});

gulp.task('cleanup-dist', ['compress-dist'], function() {
  return del(['releases/**/*', '!releases/*.zip']);
});

gulp.task('update-version-manifests', function() {
 return gulp.src(['app/manifest.webapp', 'app/manifest.json'])
    .pipe($.replace(/"version": ".*",/, '"version": "' + pj.version + '",'))
    .pipe(gulp.dest('app'));
});

gulp.task('update-version-config', function() {
 return gulp.src('app/js/lib/config.js')
    .pipe($.replace(/version: '.*?'/, 'version: \'' + pj.version  + '\''))
    .pipe(gulp.dest('app/js/lib'));
});

gulp.task('update-version-comments', function() {
 return gulp.src('app/**/*.js')
  .pipe($.replace(/Webogram v[0-9.]*/, 'Webogram v' +  pj.version))
  .pipe(gulp.dest('app'));
});

gulp.task('enable-production', function() {
 return es.concat(
  gulp.src('app/**/*.html')
    .pipe($.replace(/PRODUCTION_ONLY_BEGIN/g, 'PRODUCTION_ONLY_BEGIN-->'))
    .pipe($.replace(/PRODUCTION_ONLY_END/, '<!--PRODUCTION_ONLY_END'))
    .pipe(gulp.dest('app')),
  gulp.src('app/**/*.js')
    .pipe($.replace(/PRODUCTION_ONLY_BEGIN(\*\/)?/g, 'PRODUCTION_ONLY_BEGIN*/'))
    .pipe($.replace(/(\/\*)?PRODUCTION_ONLY_END/g, '/*PRODUCTION_ONLY_END'))
    .pipe(gulp.dest('app'))
  );
});

gulp.task('disable-production', function() {
 return es.concat(
  gulp.src('app/index.html')
    .pipe($.replace(/PRODUCTION_ONLY_BEGIN-->/g, 'PRODUCTION_ONLY_BEGIN'))
    .pipe($.replace(/<!--PRODUCTION_ONLY_END/g, 'PRODUCTION_ONLY_END'))
    .pipe(gulp.dest('app')),
  gulp.src('app/**/*.js')
    .pipe($.replace(/PRODUCTION_ONLY_BEGIN(\*\/)?/g, 'PRODUCTION_ONLY_BEGIN'))
    .pipe($.replace(/(\/\*)?PRODUCTION_ONLY_END/g, 'PRODUCTION_ONLY_END'))
    .pipe(gulp.dest('app'))
  );
});

var fileGlobs = [
  './dist/**/*',
  '!dist/manifest.*',
  '!dist/*.html',
  '!dist/fonts/*',
  '!dist/img/icons/icon*.png',
  '!dist/js/background.js',
];

gulp.task('generate-service-worker', ['build'], function() {
  return gulp.src(fileGlobs)
  .pipe(gulpServiceWorker({
    rootDir: 'dist/',
  }));
});

gulp.task('add-appcache-manifest', ['build'], function() {
  return gulp.src(fileGlobs)
          .pipe($.manifest({
              timestamp: true,
              network: ['http://*', 'https://*', '*'],
              filename: 'webogram.appcache',
              exclude: ['webogram.appcache', 'app.manifest']
            })
          )
          .pipe(gulp.dest('./dist'));
});

gulp.task('package-dev', function() {
  return es.concat(
    gulp.src('app/partials/*.html')
     .pipe($.angularTemplatecache('templates.js', {
       root: 'partials',
       module: 'myApp.templates',
       standalone: true
     }))
     .pipe(gulp.dest('dist_package/js')),

    gulp.src(['app/favicon.ico', 'app/favicon_unread.ico', 'app/manifest.webapp', 'app/manifest.json'])
     .pipe(gulp.dest('dist_package')),
    gulp.src(['app/css/**/*'])
     .pipe(gulp.dest('dist_package/css')),
    gulp.src(['app/img/**/*'])
     .pipe(gulp.dest('dist_package/img')),
    gulp.src('app/vendor/**/*')
     .pipe(gulp.dest('dist_package/vendor')),
    gulp.src('app/**/*.json')
     .pipe(gulp.dest('dist_package')),

    gulp.src('app/**/*.html')
      .pipe($.replace(/PRODUCTION_ONLY_BEGIN/g, 'PRODUCTION_ONLY_BEGIN-->'))
      .pipe($.replace(/PRODUCTION_ONLY_END/, '<!--PRODUCTION_ONLY_END'))
      .pipe(gulp.dest('dist_package')),

    gulp.src('app/**/*.js')
      .pipe($.ngAnnotate())
      .pipe($.replace(/PRODUCTION_ONLY_BEGIN(\*\/)?/g, 'PRODUCTION_ONLY_BEGIN*/'))
      .pipe($.replace(/(\/\*)?PRODUCTION_ONLY_END/g, '/*PRODUCTION_ONLY_END'))
      .pipe(gulp.dest('dist_package'))
    );
});

gulp.task('watchcss', function() {
  gulp.src('app/css/*.css')
    .pipe(livereload());
});

gulp.task('watchhtml', function() {
  gulp.src('app/partials/**/*.html')
    .pipe(livereload());
});

gulp.task('watch', ['server', 'less'], function() {
  livereload.listen({ basePath: 'app' });
  gulp.watch('app/css/*.css', ['watchcss']);
  gulp.watch('app/less/**/*.less', ['less']);
  gulp.watch('app/partials/**/*.html', ['watchhtml']);
});

gulp.task('server', function(done) {
  http.createServer(
    st({ path: __dirname, index: 'index.html', cache: false })
  ).listen(8000, done);
});

gulp.task('clean', function() {
  return del(['dist/*', 'app/js/templates.js', 'app/css/*', '!dist/.git']);
});

gulp.task('bump', ['update-version-manifests', 'update-version-config'], function () {
  gulp.start('update-version-comments');
});

gulp.task('build', ['clean'], function(callback) {
  runSequence(
    ['less', 'templates', 'enable-production'],
    'usemin',
    ['copy', 'copy-locales', 'copy-images', 'disable-production'],
    callback
  );
});

gulp.task('package', ['cleanup-dist']);

gulp.task('offline', ['add-appcache-manifest', 'generate-service-worker']);

gulp.task('deploy', ['offline'], function() {
  return oghliner.deploy({
    rootDir: 'dist/',
  });
});

gulp.task('default', ['build']);