"use strict";

const webpack = require("webpack");
const fs = require("fs");
const path = require("path");
const CopyPlugin = require("copy-webpack-plugin");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const VueLoaderPlugin = require("vue-loader/lib/plugin");
const Helper = require("./src/helper.js");
const babelConfig = require("./babel.config.cjs");

const isProduction = process.env.NODE_ENV === "production";
const config = {
	mode: isProduction ? "production" : "development",
	entry: {
		"js/bundle.js": [path.resolve(__dirname, "client/js/vue.js")],
	},
	devtool: "source-map",
	output: {
		path: path.resolve(__dirname, "public"),
		filename: "[name]",
		publicPath: "/",
	},
	performance: {
		hints: false,
	},
	module: {
		rules: [
			{
				test: /\.vue$/,
				use: {
					loader: "vue-loader",
					options: {
						compilerOptions: {
							preserveWhitespace: false,
						},
					},
				},
			},
			{
				test: /\.css$/,
				use: [
					{
						loader: MiniCssExtractPlugin.loader,
						options: {
							esModule: false,
						},
					},
					{
						loader: "css-loader",
						options: {
							url: false,
							importLoaders: 1,
							sourceMap: true,
						},
					},
					{
						loader: "postcss-loader",
						options: {
							sourceMap: true,
						},
					},
				],
			},
			{
				test: /\.js$/,
				include: [path.resolve(__dirname, "client")],
				use: {
					loader: "babel-loader",
					options: babelConfig,
				},
			},
		],
	},
	optimization: {
		splitChunks: {
			cacheGroups: {
				commons: {
					test: /[\\/]node_modules[\\/]/,
					name: "js/bundle.vendor.js",
					chunks: "all",
				},
			},
		},
	},
	externals: {
		json3: "JSON", // socket.io uses json3.js, but we do not target any browsers that need it
	},
	plugins: [
		new VueLoaderPlugin(),
		new MiniCssExtractPlugin({
			filename: "css/style.css",
		}),
		new CopyPlugin({
			patterns: [
				{
					from: "./node_modules/@fortawesome/fontawesome-free/webfonts/fa-solid-900.woff*",
					to: "fonts/[name][ext]",
				},
				{
					from: "./client/js/loading-error-handlers.js",
					to: "js/[name][ext]",
				},
				{
					from: "./client/*",
					to: "[name][ext]",
					globOptions: {
						ignore: ["**/index.html.tpl", "**/service-worker.js"],
					},
				},
				{
					from: "./client/service-worker.js",
					to: "[name][ext]",
					transform(content) {
						return content
							.toString()
							.replace(
								"__HASH__",
								isProduction ? Helper.getVersionCacheBust() : "dev"
							);
					},
				},
				{
					from: "./client/audio/*",
					to: "audio/[name][ext]",
				},
				{
					from: "./client/img/*",
					to: "img/[name][ext]",
				},
				{
					from: "./client/themes/*",
					to: "themes/[name][ext]",
				},
			],
		}),
		// socket.io uses debug, we don't need it
		new webpack.NormalModuleReplacementPlugin(
			/debug/,
			path.resolve(__dirname, "scripts/noop.js")
		),
	],
};

module.exports = (env, argv) => {
	if (argv.mode === "development") {
		const testFile = path.resolve(__dirname, "test/public/testclient.js");

		if (fs.existsSync(testFile)) {
			fs.unlinkSync(testFile);
		}

		config.target = "node";
		config.devtool = "eval";
		config.stats = "errors-only";
		config.output.path = path.resolve(__dirname, "test/public");
		config.entry = {
			"testclient.js": [path.resolve(__dirname, "test/client/index.js")],
		};

		// Add the istanbul plugin to babel-loader options
		for (const rule of config.module.rules) {
			if (rule.use.loader === "babel-loader") {
				rule.use.options.plugins = ["istanbul"];
			}
		}

		// `optimization.splitChunks` is incompatible with a `target` of `node`. See:
		// - https://github.com/zinserjan/mocha-webpack/issues/84
		// - https://github.com/webpack/webpack/issues/6727#issuecomment-372589122
		config.optimization.splitChunks = false;

		// Disable plugins like copy files, it is not required
		config.plugins = [
			new VueLoaderPlugin(),

			// Client tests that require Vue may end up requireing socket.io
			new webpack.NormalModuleReplacementPlugin(
				/js(\/|\\)socket\.js/,
				path.resolve(__dirname, "scripts/noop.js")
			),

			// "Fixes" Critical dependency: the request of a dependency is an expression
			new webpack.ContextReplacementPlugin(/vue-server-renderer$/),
		];
	}

	if (argv.mode === "production") {
		// ...
	}

	return config;
};