const webpack = require("webpack");
const path = require("path");
const merge = require("webpack-merge");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const PreloadWebpackPlugin = require("preload-webpack-plugin");
const HtmlWebpackPlugin = require("html-webpack-plugin");
const WebpackPwaManifest = require("webpack-pwa-manifest");
const { GenerateSW } = require("workbox-webpack-plugin");

const root = path.join(__dirname, "..");
const prod = process.env.NODE_ENV === "production" || process.env.CI === "true";
const cachePattern = /\.(?:png|jpg|jpeg|svg|css|js|ttf|woff|eot|woff2|wasm)$/;

module.exports = (options = {}) => merge(
	require("./webpack.general.config")(options), {
	devtool: prod ? "none" : "cheap-module-eval-source-map",
	mode: prod ? "production" : "development",
	entry: prod ? options.entry : [
		"webpack-hot-middleware/client?reload=true&quiet=true",
		options.entry,
	],
	module: {
		rules: [{
			test: /\.s?css$/,
			// This is required otherwise it'll fail to resolve CSS in common.
			include: root,
			use: [{
				loader: MiniCssExtractPlugin.loader,
			}, {
				loader: "css-loader",
			}, {
				loader: "sass-loader",
			}],
		}, {
			test: /\.(png|ttf|woff|eot|woff2)$/,
			use: [{
				loader: "file-loader",
				options: {
					name: "[path][name].[ext]",
				},
			}],
		}, {
			test: /\.svg$/,
			loader: 'url-loader'
		}],
	},
	plugins: [
		new MiniCssExtractPlugin({
			chunkFilename: `${options.name || "client"}.[name].[hash:6].css`,
			filename: `${options.name || "client"}.[name].[hash:6].css`
		}),
		new HtmlWebpackPlugin({
			template: options.template
		}),
		new PreloadWebpackPlugin({
			rel: "preload",
			as: "script"
		}),
		new WebpackPwaManifest({
			name: "Coder",
			short_name: "Coder",
			description: "Run VS Code on a remote server",
			background_color: "#e5e5e5",
			icons: [{
				src: path.join(root, "packages/web/assets/logo.png"),
				sizes: [96, 128, 192, 256, 384],
			}],
		})
	].concat(prod ? [
		new GenerateSW({
			include: [cachePattern],
			runtimeCaching: [{
				urlPattern: cachePattern,
				handler: "StaleWhileRevalidate",
				options: {
					cacheName: "code-server",
					expiration: {
						maxAgeSeconds: 86400,
					},
					cacheableResponse: {
						statuses: [0, 200],
					},
				},
			},
		]}),
	] : [new webpack.HotModuleReplacementPlugin()]),
	target: "web"
});