/**
 * Copyright (c) OpenLens Authors. All rights reserved.
 * Licensed under MIT License. See LICENSE in root directory for more information.
 */

import path from "path";
import type webpack from "webpack";
import HtmlWebpackPlugin from "html-webpack-plugin";
import MiniCssExtractPlugin from "mini-css-extract-plugin";
import ForkTsCheckerPlugin from "fork-ts-checker-webpack-plugin";
import MonacoWebpackPlugin from "monaco-editor-webpack-plugin";
import CircularDependencyPlugin from "circular-dependency-plugin";
import ReactRefreshWebpackPlugin from "@pmmmwh/react-refresh-webpack-plugin";
import CopyPlugin from "copy-webpack-plugin";
import type { WebpackPluginInstance } from "webpack";
import { DefinePlugin } from "webpack";
import {
  assetsFolderName,
  isDevelopment,
  rendererDir,
  buildDir,
  htmlTemplate,
  publicPath,
} from "./vars";
import corePackageJson from "@k8slens/core/package.json";

const renderer: webpack.Configuration = {
  target: "electron-renderer",
  name: "lens-app-renderer",
  mode: isDevelopment ? "development" : "production",
  // https://webpack.js.org/configuration/devtool/ (see description of each option)
  devtool: isDevelopment ? "cheap-module-source-map" : "source-map",
  cache: isDevelopment ? { type: "filesystem" } : false,
  entry: {
    lens: path.resolve(rendererDir, "index.ts"),
  },
  output: {
    libraryTarget: "global",
    globalObject: "this",
    publicPath,
    path: buildDir,
    filename: "[name].js",
    chunkFilename: "chunks/[name].js",
    assetModuleFilename: `${assetsFolderName}/[name][ext][query]`,
  },
  watchOptions: {
    ignored: /node_modules/, // https://webpack.js.org/configuration/watch/
  },
  ignoreWarnings: [
    /Critical dependency: the request of a dependency is an expression/,
    /require.extensions is not supported by webpack./, // handlebars
    /\[ReactRefreshPlugin] .*?HMR.*? is not enabled/, // enabled in webpack.dev-server
  ],
  resolve: {
    extensions: [".js", ".jsx", ".json", ".ts", ".tsx"],
  },
  externals: ["npm", "win-ca"],
  optimization: {
    minimize: false,
  },
  module: {
    parser: {
      javascript: {
        commonjsMagicComments: true,
      },
    },
    rules: [
      {
        test: /\.node$/,
        use: "node-loader",
      },
      {
        test: /\.tsx?$/,
        loader: "ts-loader",
        options: {},
      },
      cssModulesWebpackRule(),
      ...iconsAndImagesWebpackRules(),
      ...fontsLoaderWebpackRules(),
    ],
  },

  plugins: [
    new DefinePlugin({
      CONTEXT_MATCHER_FOR_NON_FEATURES: `/\\.injectable\\.tsx?$/`,
      CONTEXT_MATCHER_FOR_FEATURES: `/\\/(renderer|common)\\/.+\\.injectable\\.tsx?$/`,
    }),
    new ForkTsCheckerPlugin(),

    // see also: https://github.com/Microsoft/monaco-editor-webpack-plugin#options
    new MonacoWebpackPlugin({
      // publicPath: "/",
      // filename: "[name].worker.js",
      languages: ["json", "yaml"],
      globalAPI: isDevelopment,
    }),

    new HtmlWebpackPlugin({
      filename: "index.html",
      template: htmlTemplate,
      inject: true,
      hash: true,
      templateParameters: {
        assetPath: `${publicPath}${assetsFolderName}`,
      },
    }),

    new CircularDependencyPlugin({
      cwd: __dirname,
      exclude: /node_modules/,
      failOnError: true,
    }) as unknown as WebpackPluginInstance,

    new MiniCssExtractPlugin({
      filename: "[name].css",
    }),

    new CopyPlugin({
      patterns: [
        {
          from: path.resolve(
            path.dirname(require.resolve("@k8slens/core/package.json")),
            corePackageJson.exports["./fonts"]
          ),
          to: "[name][ext]",
        },
      ],
    }),

    ...(isDevelopment ? [new ReactRefreshWebpackPlugin()] : []),
  ],
};

/**
 * Import icons and image files.
 * Read more about asset types: https://webpack.js.org/guides/asset-modules/
 */
export function iconsAndImagesWebpackRules(): webpack.RuleSetRule[] {
  return [
    {
      test: /\.svg$/,
      type: "asset/source", // exports the source code of the asset, so we get XML
    },
    {
      test: /\.(jpg|png|ico)$/,
      type: "asset/resource",
      generator: {
        filename: "images/[name][ext]",
      },
    },
  ];
}

/**
 * Import custom fonts as URL.
 */
export function fontsLoaderWebpackRules(): webpack.RuleSetRule[] {
  return [
    {
      test: /\.(ttf|eot|woff2?)$/,
      type: "asset/resource",
      generator: {
        filename: "fonts/[name][ext]",
      },
    },
  ];
}

export interface CssModulesWebpackRuleOptions {
  styleLoader?: string;
}

/**
 * Import CSS or SASS styles with modules support (*.module.scss)
 */
export function cssModulesWebpackRule({
  styleLoader,
}: CssModulesWebpackRuleOptions = {}): webpack.RuleSetRule {
  styleLoader ??= isDevelopment ? "style-loader" : MiniCssExtractPlugin.loader;

  return {
    test: /\.s?css$/,
    use: [
      styleLoader,
      {
        loader: "css-loader",
        options: {
          sourceMap: isDevelopment,
          modules: {
            auto: /\.module\./i, // https://github.com/webpack-contrib/css-loader#auto
            mode: "local", // :local(.selector) by default
            localIdentName: "[name]__[local]--[hash:base64:5]",
          },
        },
      },
    ],
  };
}

export default renderer;