var gulp = require('gulp');
var webpack = require('webpack');
var mocha = require('gulp-spawn-mocha');
var eslint = require('gulp-eslint');
var each = require('gulp-each');
var fc2json = require('gulp-file-contents-to-json');
var log = require('fancy-log');
var PluginError = require('plugin-error');

var DEBUG = process.env.NODE_ENV === 'debug';
var CI = process.env.CI === 'true';

//var vfsBefore = "this.pdfMake = this.pdfMake || {}; this.pdfMake.vfs = ";
var vfsBefore = "pdfMake = pdfMake || {}; pdfMake.vfs = ";
var vfsAfter = ";";

gulp.task('build', function (callback) {
	webpack(require('./webpack.config.js'), function (err, stats) {
		if (err) {
			throw new PluginError("webpack", err);
		}
		log("[webpack]", stats.toString({}));
		callback();
	});
});


gulp.task('test', function () {
	return gulp.src(['./tests/**/*.js'])
		.pipe(mocha({
			debugBrk: DEBUG,
			R: CI ? 'spec' : 'nyan'
		}));
});

gulp.task('lint', function () {
	return gulp.src(['./src/**/*.js'])
		.pipe(eslint())
		.pipe(eslint.format())
		.pipe(eslint.failAfterError());
});

gulp.task('buildFonts', function () {
	return gulp.src(['./fonts/*.*'])
		.pipe(each(function (content, file, callback) {
			var newContent = new Buffer(content).toString('base64');
			callback(null, newContent);
		}, 'buffer'))
		.pipe(fc2json('vfs_fonts.js', {flat: true}))
		.pipe(each(function (content, file, callback) {
			var newContent = vfsBefore + content + vfsAfter;
			callback(null, newContent);
		}, 'buffer'))
		.pipe(gulp.dest('build'));
});

gulp.task('watch', function () {
	gulp.watch('./src/**', ['test', 'build']);
	gulp.watch('./tests/**', ['test']);
});

gulp.task('default', gulp.series(/*'lint',*/ 'test', 'build', 'buildFonts'));