'use strict';

function setUpTaskHtml(context) {

if (!context.gulp) {

throw new Error('Context must specify gulp instance');

}

if (!context.runSequence) {

throw new Error('Context must specify run-sequence instance');

}

var taskDefinition = {

name : 'html',

description : 'The "html" task performs a one time injection of pre-built JS and CSS into the application ' +

'HTML.',

prerequisiteTasks: ['help'],

checks : [],

options : [],

onInit : function onInitHtmlTask() {

var gulp = context.gulp,

runSequence = context.runSequence,

inject = require('gulp-inject'),

plumber = require('gulp-plumber'),

rimraf = require('gulp-rimraf');

var injectAdjacent = require('../lib/inject/adjacent-files'),

bowerFiles = require('../lib/inject/bower-files'),

hr = require('../lib/util/hr'),

streams = require('../lib/config/streams');

// `cliArgs` are available within gulp tasks by means of closure,

// as they are only called after `onRun` has been invoked, and they have been passed

gulp.task('html', function (done) {

console.log(hr('-', 80, 'html'));

runSequence(

'html:clean',

['html:inject', 'html:assets'],

done

);

});

// clean the html build directory

gulp.task('html:clean', function () {

return gulp.src([streams.BUILD + '/**/*.html*', streams.BUILD + '/**/assets'], {read: false})

.pipe(rimraf());

});

// inject dependencies into html and output to build directory

gulp.task('html:inject', function () {

var bower = bowerFiles({

pattern: 'js|css',

context: 'build'

});

return streams.htmlApp()

.pipe(plumber())

.pipe(gulp.dest(streams.BUILD)) // put html in final directory first to get correct inject paths

.pipe(injectAdjacent('js|css', {name: 'inject'}))

.pipe(inject(bower({read: false}), {name: 'bower'}))

.pipe(gulp.dest(streams.BUILD));

});

// copy assets to build directory

gulp.task('html:assets', function () {

return gulp.src(streams.APP + '/**/assets/**')

.pipe(gulp.dest(streams.BUILD));

});

},

onRun : function onRunHtmlTask() {

var gulp = context.gulp;

gulp.start(taskDefinition.name);

}

};

return taskDefinition;

}

module.exports = setUpTaskHtml;