var path = require('path');
var gulp = require('gulp');
var gutil = require('gulp-util');
var wrap = require('gulp-wrap');
var concat = require('gulp-concat');
var babel = require('gulp-babel');
var fs = require('fs');
var del = require('del');
var webpack = require('webpack');
var WebpackDevServer = require("webpack-dev-server");
var webpackConfig = require('./webpack.config.js');

// Clean

var buildDir = '../services/nginx/static'

gulp.task('clean', function() {
	return del(buildDir +'/*', {force: true});
});

// Spliting

var splitingDir = './app/src/spliting';
var splitingFiles = splitingDir +'/*';

gulp.task('spliting', function() {
	var jsonDeps = fs.readFileSync(splitingDir +'/deps.json');
	var modules = JSON.parse(jsonDeps);

	var importTpl = fs.readFileSync(splitingDir +'/import.tpl.js', 'utf8');
	var requireTpl = fs.readFileSync(splitingDir +'/require.tpl.js', 'utf8');

	for(var modName in modules)
	{
		var deps = modules[modName];
		var splitFile = './'+ modName +'/src/spliting.js';
		
		try {
			fs.unlinkSync(splitFile);
		}
		catch(e) {}
		
		fs.appendFileSync(splitFile, importTpl);
		
		var i = deps.length;
		while(i--)
			fs.appendFileSync(splitFile,
				requireTpl.replace(/\$module/g, deps[i]));
	}
});

// Webpack

gulp.task('webpack', ['spliting'], function(callback) {
	var myDevConfig = Object.create(webpackConfig);
	myDevConfig.debug = true;

	var devCompiler = webpack(myDevConfig);

	devCompiler.run(function(err, stats) {
		if(err) throw new gutil.PluginError('webpack', err);
		gutil.log('[webpack]', stats.toString({colors: true}));
		callback();
	});
});

gulp.task('webpack-dev-server', ['spliting'], function() {
	var myConfig = Object.create(webpackConfig);
	myConfig.debug = true;

	for (var entry in myConfig.entry)
		myConfig.entry[entry]
            .unshift('webpack-dev-server/client?http://0.0.0.0:8081/');

	var devServer = new WebpackDevServer(webpack(myConfig), {
		publicPath: '/',
		contentBase: buildDir,
		quiet: false,
		noInfo: false,
		//hot: true,
		stats: {
			assets: true,
			colors: true,
			version: false,
			hash: false,
			timings: true,
			chunks: false,
			chunkModules: false
		}
	})
	.listen(8081, '0.0.0.0', function(err) {
		if(err) throw new gutil.PluginError('webpack-dev-server', err);
		gutil.log('[webpack-dev-server]', 'Listening');
	});
});

// Routes

var routeFiles = './crud/**/routes.js';

gulp.task('routes', function() {
	var fileTpl = '\n"<%=file.relative%>": <%=contents%>';
	var globalTpl = 'var routes = {<%=contents%>\n}';

	return gulp.src(routeFiles)
		.pipe(wrap(fileTpl))
		.pipe(concat('salix.routes.js', {newLine: ','}))
		.pipe(wrap(globalTpl))
		.pipe(babel({presets: ['es2015']}))
		.pipe(gulp.dest(buildDir));
});

// Watch

gulp.task('watch', function() {
	gulp.watch(routeFiles, ['routes']);
	gulp.watch(splitingFiles, ['spliting']);
});

// Default

gulp.task('build', ['clean'], function() {
	return gulp.start('routes', 'webpack');
});

gulp.task('default', ['clean'], function() {
	return gulp.start('watch', 'routes', 'webpack-dev-server');
});