const fs = require("fs");
const path = require("path");

const { AngularWebpackPlugin } = require("@ngtools/webpack");
const CopyWebpackPlugin = require("copy-webpack-plugin");
const HtmlWebpackInjector = require("html-webpack-injector");
const HtmlWebpackPlugin = require("html-webpack-plugin");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const TerserPlugin = require("terser-webpack-plugin");
const webpack = require("webpack");

const config = require(path.resolve(__dirname, "config.js"));
const pjson = require(path.resolve(__dirname, "package.json"));

module.exports.getEnv = function getEnv(params) {
  const ENV = params.env || (process.env.ENV == null ? "development" : process.env.ENV);
  const NODE_ENV = process.env.NODE_ENV == null ? "development" : process.env.NODE_ENV;
  const LOGGING = process.env.LOGGING != "false";

  return { ENV, NODE_ENV, LOGGING };
};

const DEFAULT_PARAMS = {
  outputPath: path.resolve(__dirname, "build"),
};

/**
 *
 * @param {{
 *  configName: string;
 *  app: {
 *      entry: string;
 *      entryModule: string;
 *  };
 *  tsConfig: string;
 *  outputPath?: string;
 *  mode?: string;
 *  env?: string;
 *  importAliases?: import("webpack").ResolveOptions["alias"];
 * }} params
 */
module.exports.buildConfig = function buildConfig(params) {
  params = { ...DEFAULT_PARAMS, ...params };
  const { ENV, NODE_ENV, LOGGING } = module.exports.getEnv(params);

  const envConfig = config.load(ENV);
  if (LOGGING) {
    config.log(`Building web - ${params.configName} version`);
    config.log(envConfig);
  }

  const moduleRules = [
    {
      test: /\.(html)$/,
      loader: "html-loader",
    },
    {
      test: /.(ttf|otf|eot|svg|woff(2)?)(\?[a-z0-9]+)?$/,
      exclude: /loading(|-white).svg/,
      generator: {
        filename: "fonts/[name].[contenthash][ext]",
      },
      type: "asset/resource",
    },
    {
      test: /\.(jpe?g|png|gif|svg|webp|avif)$/i,
      exclude: /.*(bwi-font)\.svg/,
      generator: {
        filename: "images/[name][ext]",
      },
      type: "asset/resource",
    },
    {
      test: /\.scss$/,
      use: [
        {
          loader: MiniCssExtractPlugin.loader,
        },
        "css-loader",
        "resolve-url-loader",
        {
          loader: "sass-loader",
          options: {
            sourceMap: true,
          },
        },
      ],
    },
    {
      test: /\.css$/,
      use: [
        {
          loader: MiniCssExtractPlugin.loader,
        },
        "css-loader",
        "resolve-url-loader",
        {
          loader: "postcss-loader",
          options: {
            sourceMap: true,
            postcssOptions: {
              config: path.resolve(__dirname, "postcss.config.js"),
            },
          },
        },
      ],
    },
    {
      test: /\.[cm]?js$/,
      use: [
        {
          loader: "babel-loader",
          options: {
            configFile: path.resolve(__dirname, "../../babel.config.json"),
            cacheDirectory: NODE_ENV !== "production",
          },
        },
      ],
    },
    {
      test: /\.[jt]sx?$/,
      loader: "@ngtools/webpack",
    },
  ];

  const plugins = [
    new HtmlWebpackPlugin({
      template: path.resolve(__dirname, "src/index.html"),
      filename: "index.html",
      chunks: ["theme_head", "app/polyfills", "app/vendor", "app/main", "styles"],
    }),
    new HtmlWebpackInjector(),
    new HtmlWebpackPlugin({
      template: path.resolve(__dirname, "src/connectors/webauthn.html"),
      filename: "webauthn-connector.html",
      chunks: ["connectors/webauthn", "styles"],
    }),
    new HtmlWebpackPlugin({
      template: path.resolve(__dirname, "src/connectors/webauthn-mobile.html"),
      filename: "webauthn-mobile-connector.html",
      chunks: ["connectors/webauthn", "styles"],
    }),
    new HtmlWebpackPlugin({
      template: path.resolve(__dirname, "src/connectors/webauthn-fallback.html"),
      filename: "webauthn-fallback-connector.html",
      chunks: ["connectors/webauthn-fallback", "styles"],
    }),
    new HtmlWebpackPlugin({
      template: path.resolve(__dirname, "src/connectors/sso.html"),
      filename: "sso-connector.html",
      chunks: ["connectors/sso", "styles"],
    }),
    new HtmlWebpackPlugin({
      template: path.resolve(__dirname, "src/connectors/redirect.html"),
      filename: "redirect-connector.html",
      chunks: ["connectors/redirect", "styles"],
    }),
    new HtmlWebpackPlugin({
      template: path.resolve(__dirname, "src/connectors/duo-redirect.html"),
      filename: "duo-redirect-connector.html",
      chunks: ["connectors/duo-redirect", "styles"],
    }),
    new HtmlWebpackPlugin({
      template: path.resolve(__dirname, "src/404.html"),
      filename: "404.html",
      chunks: ["styles"],
      // 404 page is a wildcard, this ensures it uses absolute paths.
      publicPath: "/",
    }),
    new CopyWebpackPlugin({
      patterns: [
        { from: path.resolve(__dirname, "src/.nojekyll") },
        { from: path.resolve(__dirname, "src/manifest.json") },
        { from: path.resolve(__dirname, "src/favicon.ico") },
        { from: path.resolve(__dirname, "src/browserconfig.xml") },
        { from: path.resolve(__dirname, "src/app-id.json") },
        { from: path.resolve(__dirname, "src/images"), to: "images" },
        { from: path.resolve(__dirname, "src/images/icons"), to: "images" },
        { from: path.resolve(__dirname, "src/videos"), to: "videos" },
        { from: path.resolve(__dirname, "src/locales"), to: "locales" },
        {
          from: path.resolve(__dirname, "../../node_modules/qrious/dist/qrious.min.js"),
          to: "scripts",
        },
        {
          from: path.resolve(
            __dirname,
            "../../node_modules/braintree-web-drop-in/dist/browser/dropin.js",
          ),
          to: "scripts",
        },
        {
          from: path.resolve(__dirname, "src/version.json"),
          transform(content, path) {
            return content.toString().replace("process.env.APPLICATION_VERSION", pjson.version);
          },
        },
      ],
    }),
    new MiniCssExtractPlugin({
      filename: "[name].[contenthash].css",
      chunkFilename: "[id].[contenthash].css",
    }),
    new webpack.ProvidePlugin({
      process: "process/browser.js",
    }),
    new webpack.EnvironmentPlugin({
      ENV: ENV,
      NODE_ENV: NODE_ENV === "production" ? "production" : "development",
      APPLICATION_VERSION: pjson.version,
      CACHE_TAG: Math.random().toString(36).substring(7),
      URLS: envConfig["urls"] ?? {},
      STRIPE_KEY: envConfig["stripeKey"] ?? "",
      BRAINTREE_KEY: envConfig["braintreeKey"] ?? "",
      PAYPAL_CONFIG: envConfig["paypal"] ?? {},
      FLAGS: envConfig["flags"] ?? {},
      DEV_FLAGS: NODE_ENV === "development" ? envConfig["devFlags"] : {},
      ADDITIONAL_REGIONS: envConfig["additionalRegions"] ?? [],
    }),
    new AngularWebpackPlugin({
      tsconfig: params.tsConfig,
      entryModule: params.app.entryModule,
      sourceMap: true,
    }),
  ];

  // ref: https://webpack.js.org/configuration/dev-server/#devserver
  let certSuffix = fs.existsSync(path.resolve(__dirname, "dev-server.local.pem"))
    ? ".local"
    : ".shared";
  const devServer =
    NODE_ENV !== "development"
      ? {}
      : {
          server: {
            type: "https",
            options: {
              key: fs.readFileSync(path.resolve(__dirname, "dev-server" + certSuffix + ".pem")),
              cert: fs.readFileSync(path.resolve(__dirname, "dev-server" + certSuffix + ".pem")),
            },
          },
          // host: '192.168.1.9',
          proxy: [
            {
              context: ["/api"],
              target: envConfig.dev?.proxyApi,
              pathRewrite: { "^/api": "" },
              secure: false,
              changeOrigin: true,
            },
            {
              context: ["/identity"],
              target: envConfig.dev?.proxyIdentity,
              pathRewrite: { "^/identity": "" },
              secure: false,
              changeOrigin: true,
            },
            {
              context: ["/events"],
              target: envConfig.dev?.proxyEvents,
              pathRewrite: { "^/events": "" },
              secure: false,
              changeOrigin: true,
            },
            {
              context: ["/notifications"],
              target: envConfig.dev?.proxyNotifications,
              pathRewrite: { "^/notifications": "" },
              secure: false,
              changeOrigin: true,
              ws: true,
            },
            {
              context: ["/icons"],
              target: envConfig.dev?.proxyIcons,
              pathRewrite: { "^/icons": "" },
              secure: false,
              changeOrigin: true,
            },
            {
              context: ["/key-connector"],
              target: envConfig.dev?.proxyKeyConnector,
              pathRewrite: { "^/key-connector": "" },
              secure: false,
              changeOrigin: true,
            },
          ],
          headers: (req) => {
            if (!req.originalUrl.includes("connector.html")) {
              return {
                "Content-Security-Policy": `
                    default-src 'self'
                    ;script-src
                    'self'
                    'wasm-unsafe-eval'
                    'sha256-ryoU+5+IUZTuUyTElqkrQGBJXr1brEv6r2CA62WUw8w='
                    https://js.stripe.com
                    https://js.braintreegateway.com
                    https://www.paypalobjects.com
                    ;style-src
                    'self'
                    https://assets.braintreegateway.com
                    https://*.paypal.com
                    ${"'sha256-47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU='" /* date input polyfill */}
                    ${"'sha256-JVRXyYPueLWdwGwY9m/7u4QlZ1xeQdqUj2t8OVIzZE4='" /* date input polyfill */}
                    ${"'sha256-EnIJNDxVnh0++RytXJOkU0sqtLDFt1nYUDOfeJ5SKxg='" /* ng-select */}
                    ${"'sha256-dbBsIsz2pJ5loaLjhE6xWlmhYdjl6ghbwnGSCr4YObs='" /* cdk-virtual-scroll */}
                    ${"'sha256-S+uMh1G1SNQDAMG3seBmknQ26Wh+KSEoKdsNiy0joEE='" /* cdk-visually-hidden */}
                    ;img-src
                    'self'
                    data:
                    https://icons.bitwarden.net
                    https://*.paypal.com
                    https://www.paypalobjects.com
                    https://q.stripe.com
                    https://haveibeenpwned.com
                    ;media-src
                    'self'
                    https://assets.bitwarden.com
                    ;child-src
                    'self'
                    https://js.stripe.com
                    https://assets.braintreegateway.com
                    https://*.paypal.com
                    https://*.duosecurity.com
                    ;frame-src
                    'self'
                    https://js.stripe.com
                    https://assets.braintreegateway.com
                    https://*.paypal.com
                    https://*.duosecurity.com
                    ;connect-src
                    'self'
                    ${envConfig.dev.wsConnectSrc ?? ""}
                    wss://notifications.bitwarden.com
                    https://notifications.bitwarden.com
                    https://cdn.bitwarden.net
                    https://api.pwnedpasswords.com
                    https://api.2fa.directory/v3/totp.json
                    https://api.stripe.com
                    https://www.paypal.com
                    https://api.sandbox.braintreegateway.com
                    https://api.braintreegateway.com
                    https://client-analytics.braintreegateway.com
                    https://*.braintree-api.com
                    https://*.blob.core.windows.net
                    http://127.0.0.1:10000
                    https://app.simplelogin.io/api/alias/random/new
                    https://quack.duckduckgo.com/api/email/addresses
                    https://app.addy.io/api/v1/aliases
                    https://api.fastmail.com
                    https://api.forwardemail.net
                    http://localhost:5000
                    ;object-src
                    'self'
                    blob:
                    ;`
                  .replace(/\n/g, " ")
                  .replace(/ +(?= )/g, ""),
              };
            }
          },
          hot: false,
          port: envConfig.dev?.port ?? 8080,
          allowedHosts: envConfig.dev?.allowedHosts ?? "auto",
          static: {
            directory: path.resolve(params.outputPath),
            publicPath: "/",
          },
          devMiddleware: {
            // when running `serve` locally this option writes all built files to `dist`
            // files are still served from memory, this is just a helpful debug tool
            writeToDisk: true,
          },
          client: {
            overlay: {
              errors: true,
              warnings: false,
              runtimeErrors: false,
            },
          },
        };

  const webpackConfig = {
    mode: NODE_ENV,
    devtool: "source-map",
    devServer: devServer,
    target: "web",
    entry: {
      "app/polyfills": path.resolve(__dirname, "src/polyfills.ts"),
      "app/main": params.app.entry,
      "connectors/webauthn": path.resolve(__dirname, "src/connectors/webauthn.ts"),
      "connectors/webauthn-fallback": path.resolve(
        __dirname,
        "src/connectors/webauthn-fallback.ts",
      ),
      "connectors/sso": path.resolve(__dirname, "src/connectors/sso.ts"),
      "connectors/duo-redirect": path.resolve(__dirname, "src/connectors/duo-redirect.ts"),
      "connectors/redirect": path.resolve(__dirname, "src/connectors/redirect.ts"),
      styles: [
        path.resolve(__dirname, "src/scss/styles.scss"),
        path.resolve(__dirname, "src/scss/tailwind.css"),
      ],
      theme_head: path.resolve(__dirname, "src/theme.ts"),
    },
    cache:
      NODE_ENV === "production"
        ? false
        : {
            type: "filesystem",
            allowCollectingMemory: true,
            cacheDirectory: path.resolve(__dirname, "../../node_modules/.cache/webpack"),
            buildDependencies: {
              config: [__filename],
            },
          },
    snapshot: {
      unmanagedPaths: [path.resolve(__dirname, "../../node_modules/@bitwarden/")],
    },
    optimization: {
      splitChunks: {
        cacheGroups: {
          commons: {
            test: /[\\/]node_modules[\\/]/,
            name: "app/vendor",
            chunks: (chunk) => {
              return chunk.name === "app/main";
            },
          },
        },
      },
      minimize: NODE_ENV === "production",
      minimizer: [
        new TerserPlugin({
          terserOptions: {
            safari10: true,
            // Replicate Angular CLI behaviour
            compress: {
              global_defs: {
                ngDevMode: false,
                ngI18nClosureMode: false,
              },
            },
          },
        }),
      ],
    },
    resolve: {
      extensions: [".ts", ".js"],
      symlinks: false,
      modules: [
        path.resolve(__dirname, "../../node_modules"),
        path.resolve(process.cwd(), "node_modules"),
      ],
      fallback: {
        buffer: false,
        util: require.resolve("util/"),
        assert: false,
        url: false,
        fs: false,
        process: false,
        path: require.resolve("path-browserify"),
      },
      alias: params.importAliases,
    },
    output: {
      filename: "[name].[contenthash].js",
      path: params.outputPath,
      clean: true,
    },
    module: {
      rules: moduleRules,
    },
    experiments: {
      asyncWebAssembly: true,
    },
    plugins: plugins,
  };

  return webpackConfig;
};