var gulp   	= require('gulp')
var concat 	= require('gulp-concat')
var header 	= require('gulp-header')
var rename 	= require('gulp-rename')
var rimraf 	= require('gulp-rimraf')
var size   	= require('gulp-size')
var uglify 	= require('gulp-uglify')
var wrapper	= require('gulp-wrapper')
var request = require('request')
var fs 			= require('fs')

var pkg    	= require('./package.json')

var headerLong = ['/*!',
 '* <%= pkg.name %> - <%= pkg.description %>',
 '* @version <%= pkg.version %>',
 '* <%= pkg.homepage %>',
 '*',
 '* @copyright <%= pkg.author %>',
 '* @license <%= pkg.license %>',
 '*',
 '* BUILT: <%= pkg.buildDate %>',
 '*/',
 ''].join('\n')

var headerShort = '/*! <%= pkg.name %> v<%= pkg.version %> <%= pkg.license %>*/'

// all files in the right order (currently we don't use any dependency management system)
var parts = [
	'src/svg.js'
, 'src/inventor.js'
, 'src/adopter.js'
, 'src/regex.js'
, 'src/utilities.js'
, 'src/default.js'
, 'src/color.js'
, 'src/array.js'
, 'src/pointarray.js'
, 'src/patharray.js'
, 'src/number.js'
, 'src/viewbox.js'
, 'src/element.js'
, 'src/boxes.js'
, 'src/matrix.js'
, 'src/attr.js'
, 'src/transform.js'
, 'src/style.js'
, 'src/parent.js'
, 'src/container.js'
, 'src/transporter.js'
, 'src/fx.js'
, 'src/relative.js'
, 'src/event.js'
, 'src/defs.js'
, 'src/group.js'
, 'src/arrange.js'
, 'src/mask.js'
, 'src/clip.js'
, 'src/gradient.js'
, 'src/pattern.js'
, 'src/doc.js'
, 'src/spof.js'
, 'src/shape.js'
, 'src/symbol.js'
, 'src/use.js'
, 'src/rect.js'
, 'src/ellipse.js'
, 'src/line.js'
, 'src/poly.js'
, 'src/pointed.js'
, 'src/path.js'
, 'src/image.js'
, 'src/text.js'
, 'src/textpath.js'
, 'src/nested.js'
, 'src/hyperlink.js'
, 'src/marker.js'
, 'src/sugar.js'
, 'src/set.js'
, 'src/data.js'
, 'src/memory.js'
, 'src/selector.js'
, 'src/loader.js'
, 'src/helpers.js'
, 'src/polyfill.js'
]

gulp.task('clean', function() {
	return gulp.src('dist/*', { read: false }) // faster
		.pipe(rimraf())
})

/**
 * compile everything in /src to one file in the order defined in the MODULES constant
 * embed it in an immediate function call‏
 * uglify this file and call it svg.min.js
 * add the license information to the header plus the build time stamp‏
 */
gulp.task('unify', ['clean'], function() {
	pkg.buildDate = Date()
	gulp.src(parts)
		.pipe(concat('svg.js', { newLine: '\n' }))
		//wrap the whole thing in an immediate function call
		.pipe(wrapper({ header:';(function() {\n', footer: '\n}).call(this);' }))
		.pipe(header(headerLong, { pkg: pkg }))
		.pipe(size({ showFiles: true, title: 'Full' }))
		.pipe(gulp.dest('dist'))
})

/**
 ‎* gzip the file and get it's size to display in the terminal‏
 * add the license info
 * show the gzipped file size
 */
gulp.task('minify', ['unify'], function() {
	// Fugly timeout hack
	setTimeout(function() {
		gulp.src('dist/svg.js')
			.pipe(uglify())
			.pipe(rename({ suffix:'.min' }))
			.pipe(size({ showFiles: true, title: 'Minified' }))
			.pipe(header(headerShort, { pkg: pkg }))
			.pipe(size({ showFiles: true, gzip: true, title: 'Gzipped' }))
			.pipe(gulp.dest('dist'))
	}, 1000)
})

/**
 ‎* rebuild documentation using documentup
 */

gulp.task('docs', function() {
	fs.readFile('README.md', 'utf8', function (err, data) {
		request.post(
			'http://documentup.com/compiled'
		, { form: { content: data, name: 'SVG.js', theme: 'v1' } }
		, function (error, response, body) {
				// Replace stylesheet
				body = body.replace('//documentup.com/stylesheets/themes/v1.css', 'svgjs.css')

				// Write file
				fs.writeFile('docs/index.html', body, function(err) {})
			}
		)
	})
})

gulp.task('default', ['clean', 'unify', 'minify'], function() {})