var gulp = require('gulp');
var concat = require('gulp-concat');
var jshint = require('gulp-jshint');
var bower = require('bower');
var docGenerator = require('dgeni');
var merge = require('event-stream').merge;
var path = require('canonical-path');


// We indicate to gulp that tasks are async by returning the stream.
// Gulp can then wait for the stream to close before starting dependent tasks.
// See clean and bower for async tasks, and see assets and doc-gen for dependent tasks below

var outputFolder = '../build/docs';
var bowerFolder = '../bower_components';


var copyComponent = function(component, pattern, sourceFolder, packageFile) {
  pattern = pattern || '/**/*';
  sourceFolder = sourceFolder || bowerFolder;
  packageFile = packageFile || 'bower.json';
  var version = require(path.resolve(sourceFolder,component,packageFile)).version;
  return gulp
    .src(sourceFolder + '/' + component + pattern)
    .pipe(gulp.dest(outputFolder + '/components/' + component + '-' + version));
};

gulp.task('bower', function() {
  return bower.commands.install();
});

gulp.task('build-app', function() {
  gulp.src('app/src/**/*.js')
    .pipe(concat('docs.js'))
    .pipe(gulp.dest(outputFolder + '/js/'));
});

gulp.task('assets', ['bower'], function() {
  return merge(
    gulp.src(['app/assets/**/*']).pipe(gulp.dest(outputFolder)),
    copyComponent('bootstrap'),
    copyComponent('open-sans-fontface'),
    copyComponent('lunr.js','/*.js'),
    copyComponent('google-code-prettify'),
    copyComponent('jquery'),
    copyComponent('marked', '/**/*.js', '../node_modules', 'package.json')
  );
});


gulp.task('doc-gen', function() {
  return docGenerator('docs.config.js')
    .generateDocs()
    .catch(function(error) {
      process.exit(1);
    });
});

// JSHint the example and protractor test files
gulp.task('jshint', ['doc-gen'], function() {
  gulp.src([outputFolder + '/ptore2e/**/*.js', outputFolder + '/examples/**/*.js'])
    .pipe(jshint())
    .pipe(jshint.reporter('jshint-stylish'))
    .pipe(jshint.reporter('fail'));
});


// The default task that will be run if no task is supplied
gulp.task('default', ['assets', 'doc-gen', 'build-app', 'jshint']);

