text: /*
  Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
  This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
  The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
  The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
  Code distributed by Google as part of the polymer project is also
  subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
  */
  
  '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 merge = require('merge-stream');
  var path = require('path');
  var fs = require('fs');
  var glob = require('glob-all');
  var historyApiFallback = require('connect-history-api-fallback');
  var packageJson = require('./package.json');
  var crypto = require('crypto');
  var ensureFiles = require('./tasks/ensure-files.js');
  var bb = require('bitballoon');
  var env = require('gulp-env');
  
  // var ghPages = require('gulp-gh-pages');
  
  var AUTOPREFIXER_BROWSERS = [
    'ie >= 10',
    'ie_mob >= 10',
    'ff >= 30',
    'chrome >= 34',
    'safari >= 7',
    'opera >= 23',
    'ios >= 7',
    'android >= 4.4',
    'bb >= 10'
  ];
  
  var DIST = 'dist';
  
  var dist = function(subpath) {
    return !subpath ? DIST : path.join(DIST, subpath);
  };
  
  var styleTask = function(stylesPath, srcs) {
    return gulp.src(srcs.map(function(src) {
        return path.join('app', stylesPath, src);
      }))
      .pipe($.changed(stylesPath, {extension: '.css'}))
      .pipe($.autoprefixer(AUTOPREFIXER_BROWSERS))
      .pipe(gulp.dest('.tmp/' + stylesPath))
      .pipe($.minifyCss())
      .pipe(gulp.dest(dist(stylesPath)))
      .pipe($.size({title: stylesPath}));
  };
  
  var imageOptimizeTask = function(src, dest) {
    return gulp.src(src)
      .pipe($.imagemin({
        progressive: true,
        interlaced: true
      }))
      .pipe(gulp.dest(dest))
      .pipe($.size({title: 'images'}));
  };
  
  var optimizeHtmlTask = function(src, dest) {
    var assets = $.useref.assets({
      searchPath: ['.tmp', 'app']
    });
  
    return gulp.src(src)
      .pipe(assets)
      // Concatenate and minify JavaScript
      .pipe($.if('*.js', $.uglify({
        preserveComments: 'some'
      })))
      // Concatenate and minify styles
      // In case you are still using useref build blocks
      .pipe($.if('*.css', $.minifyCss()))
      .pipe(assets.restore())
      .pipe($.useref())
      // Minify any HTML
      .pipe($.if('*.html', $.minifyHtml({
        quotes: true,
        empty: true,
        spare: true
      })))
      // Output files
      .pipe(gulp.dest(dest))
      .pipe($.size({
        title: 'html'
      }));
  };
  
  // Compile and automatically prefix stylesheets
  gulp.task('styles', function() {
    return styleTask('styles', ['**/*.css']);
  });
  
  gulp.task('elements', function() {
    return styleTask('elements', ['**/*.css']);
  });
  
  // Ensure that we are not missing required files for the project
  // "dot" files are specifically tricky due to them being hidden on
  // some systems.
  gulp.task('ensureFiles', function(cb) {
    var requiredFiles = ['.jscsrc', '.jshintrc', '.bowerrc'];
  
    ensureFiles(requiredFiles.map(function(p) {
      return path.join(__dirname, p);
    }), cb);
  });
  
  // Lint JavaScript
  gulp.task('lint', ['ensureFiles'], function() {
    return gulp.src([
        'app/scripts/**/*.js',
        'app/elements/**/*.js',
        'app/elements/**/*.html',
        'gulpfile.js'
      ])
      .pipe(reload({
        stream: true,
        once: true
      }))
  
    // JSCS has not yet a extract option
    // .pipe($.if('*.html', $.htmlExtract({strip: true})))
    // .pipe($.jshint())
    // .pipe($.jscs())
    // .pipe($.jscsStylish.combineWithHintResults())
    // .pipe($.jshint.reporter('jshint-stylish'))
    // .pipe($.if(!browserSync.active, $.jshint.reporter('fail')));
  });
  
  // Optimize images
  gulp.task('images', function() {
    return imageOptimizeTask('app/images/**/*', dist('images'));
  });
  
  // Copy all files at the root level (app)
  gulp.task('copy', function() {
    var app = gulp.src([
      'app/*',
      '!app/test',
      '!app/elements',
      '!app/bower_components',
      '!app/cache-config.json',
      '!**/.DS_Store'
    ], {
      dot: true
    }).pipe(gulp.dest(dist()));
  
   var sol = gulp.src([
      'app/contracts/**/*.json'
    ]).pipe(gulp.dest('dist/contracts'));
  
    // Copy over only the bower_components we need
    // These are things which cannot be vulcanized
    var bower = gulp.src([
      'app/bower_components/{webcomponentsjs,platinum-sw,sw-toolbox,promise-polyfill}/**/*'
    ]).pipe(gulp.dest(dist('bower_components')));
  
    return merge(app, bower)
      .pipe($.size({
        title: 'copy'
      }));
  });
  
  // Copy web fonts to dist
  gulp.task('fonts', function() {
    return gulp.src(['app/fonts/**'])
      .pipe(gulp.dest(dist('fonts')))
      .pipe($.size({
        title: 'fonts'
      }));
  });
  
  // Scan your HTML for assets & optimize them
  gulp.task('html', function() {
    return optimizeHtmlTask(
      ['app/**/*.html', '!app/{elements,test,bower_components}/**/*.html'],
      dist());
  });
  
  // Vulcanize granular configuration
  gulp.task('vulcanize', function() {
    return gulp.src('app/elements/elements.html')
      .pipe($.vulcanize({
        stripComments: true,
        inlineCss: true,
        inlineScripts: true
      }))
      .pipe(gulp.dest(dist('elements')))
      .pipe($.size({title: 'vulcanize'}));
  });
  
  // Generate config data for the <sw-precache-cache> element.
  // This include a list of files that should be precached, as well as a (hopefully unique) cache
  // id that ensure that multiple PSK projects don't share the same Cache Storage.
  // This task does not run by default, but if you are interested in using service worker caching
  // in your project, please enable it within the 'default' task.
  // See https://github.com/PolymerElements/polymer-starter-kit#enable-service-worker-support
  // for more context.
  gulp.task('cache-config', function(callback) {
    var dir = dist();
    var config = {
      cacheId: packageJson.name || path.basename(__dirname),
      disabled: false
    };
  
    glob([
      'index.html',
      './',
      'bower_components/webcomponentsjs/webcomponents-lite.min.js',
      '{elements,scripts,styles}/**/*.*'],
      {cwd: dir}, function(error, files) {
      if (error) {
        callback(error);
      } else {
        config.precache = files;
  
        var md5 = crypto.createHash('md5');
        md5.update(JSON.stringify(config.precache));
        config.precacheFingerprint = md5.digest('hex');
  
        var configPath = path.join(dir, 'cache-config.json');
        fs.writeFile(configPath, JSON.stringify(config), callback);
      }
    });
  });
  
  // Clean output directory
  gulp.task('clean', function() {
    return del(['.tmp', dist()]);
  });
  
  // Watch files for changes & reload
  gulp.task('serve', ['lint', 'styles', 'elements'], function() {
    browserSync({
      port: 5000,
      notify: false,
      logPrefix: 'PSK',
      snippetOptions: {
        rule: {
          match: '<span id="browser-sync-binding"></span>',
          fn: function(snippet) {
            return snippet;
          }
        }
      },
      // Run as an https by uncommenting 'https: true'
      // Note: this uses an unsigned certificate which on first access
      //       will present a certificate warning in the browser.
      // https: true,
      server: {
        baseDir: ['.tmp', 'app'],
        middleware: [historyApiFallback()]
      }
    });
  
    gulp.watch(['app/**/*.html'], reload);
    gulp.watch(['app/styles/**/*.css'], ['styles', reload]);
    gulp.watch(['app/elements/**/*.css'], ['elements', reload]);
    gulp.watch(['app/{scripts,elements}/**/{*.js,*.html}'], ['lint']);
    gulp.watch(['app/images/**/*'], reload);
  });
  
  // Build and serve the output from the dist build
  gulp.task('serve:dist', ['default'], function() {
    browserSync({
      port: 5001,
      notify: false,
      logPrefix: 'PSK',
      snippetOptions: {
        rule: {
          match: '<span id="browser-sync-binding"></span>',
          fn: function(snippet) {
            return snippet;
          }
        }
      },
      // Run as an https by uncommenting 'https: true'
      // Note: this uses an unsigned certificate which on first access
      //       will present a certificate warning in the browser.
      // https: true,
      server: dist(),
      middleware: [historyApiFallback()]
    });
  });
  
  // Build production files, the default task
  gulp.task('default', ['clean'], function(cb) {
    // Uncomment 'cache-config' if you are going to use service workers.
    runSequence(
      ['copy', 'styles'],
      'elements',
      ['lint', 'images', 'fonts', 'html'],
      'vulcanize', // 'cache-config',
      cb);
  });
  
  // Build then deploy to GitHub pages gh-pages branch
  gulp.task('build-deploy-gh-pages', function(cb) {
    runSequence(
      'default',
      'deploy-gh-pages',
      cb);
  });
  
  // Deploy to GitHub pages gh-pages branch
  gulp.task('deploy-gh-pages', function() {
    return gulp.src(dist('**/*'))
      // Check if running task from Travis CI, if so run using GH_TOKEN
      // otherwise run using ghPages defaults.
      .pipe($.if(process.env.TRAVIS === 'true', $.ghPages({
        remoteUrl: 'https://$GH_TOKEN@github.com/polymerelements/polymer-starter-kit.git',
        silent: true,
        branch: 'gh-pages'
      }), $.ghPages()));
  });
  
  // deploy to bitballoon
  gulp.task('deploy', null, function() {
  
    env({
      file: 'env.json',
    });
  
    if (!process.env.BB_ACCESSTOKEN) {
      console.log('to deploy create a env.json file (see env.json.sample)');
      process.exit();
    }
  
    console.log('AT=', process.env.BB_ACCESSTOKEN);
  
    bb.deploy({
      access_token: process.env.BB_ACCESSTOKEN,
      site_id: process.env.BB_URL,
      dir: "dist"
    }, function(err, deploy) {
      console.log('deployed at:',process.env.BB_URL);
      if (err) {
        throw (err)
      }
    });
  });
  
  // Load tasks for web-component-tester
  // Adds tasks for `gulp test:local` and `gulp test:remote`
  // require('web-component-tester').gulp.init(gulp);
  
  // Load custom tasks from the `tasks` directory
  try {
    require('require-dir')('tasks');
  } catch (err) {}
  