import { appName, buildDir, htmlTemplate, isDevelopment, isProduction, publicPath, rendererDir, sassCommonVars, webpackDevServerPort } from "./src/common/vars";
import path from "path";
import webpack from "webpack";
import HtmlWebpackPlugin from "html-webpack-plugin";
import MiniCssExtractPlugin from "mini-css-extract-plugin";
import TerserPlugin from "terser-webpack-plugin";
import ForkTsCheckerPlugin from "fork-ts-checker-webpack-plugin";
import ReactRefreshWebpackPlugin from "@pmmmwh/react-refresh-webpack-plugin";
import * as vars from "./src/common/vars";

export default [
  webpackLensRenderer
];

export function webpackLensRenderer({ showVars = true } = {}): webpack.Configuration {
  if (showVars) {
    console.info("WEBPACK:renderer", vars);
  }

  return {
    context: __dirname,
    target: "electron-renderer",
    devtool: isProduction ? "source-map" : "eval-source-map",
    devServer: {
      contentBase: buildDir,
      port: webpackDevServerPort,
      host: "localhost",
      hot: true,
      // to avoid cors errors when requests is from iframes
      disableHostCheck: true,
      headers: { "Access-Control-Allow-Origin": "*" },
    },
    name: "lens-app",
    mode: isProduction ? "production" : "development",
    cache: isDevelopment,
    entry: {
      [appName]: path.resolve(rendererDir, "bootstrap.tsx"),
    },
    output: {
      libraryTarget: "global",
      globalObject: "this",
      publicPath,
      path: buildDir,
      filename: "[name].js",
      chunkFilename: "chunks/[name].js",
    },
    ignoreWarnings: [
      /Critical dependency: the request of a dependency is an expression/,
      /export '.*' was not found in/
    ],
    resolve: {
      extensions: [
        ".js", ".jsx", ".json",
        ".ts", ".tsx",
      ],
      // the alias is to avoid webpack warning
      // "require.extensions is not supported by webpack. Use a loader instead."
      // from ./src/extensions/cluster-feature.ts
      // the trick is from <https://github.com/handlebars-lang/handlebars.js/issues/953#issuecomment-239874313>
      alias: {
        "handlebars": "handlebars/dist/handlebars.js"
      }
    },
    optimization: {
      minimize: isProduction,
      minimizer: [
        new TerserPlugin({
          extractComments: {
            condition: "some",
            banner: [
              `Lens - The Kubernetes IDE. Copyright ${new Date().getFullYear()} by Mirantis, Inc. All rights reserved.`
            ].join("\n")
          }
        })
      ],
    },

    module: {
      rules: [
        {
          test: /\.node$/,
          use: "node-loader"
        },
        {
          test: /\.tsx?$/,
          exclude: /node_modules/,
          use: {
            loader: "ts-loader",
            options: {
              transpileOnly: true, // ForkTsCheckerPlugin does type-checking
            }
          }
        },
        {
          test: /\.(jpg|png|svg|map|ico)$/,
          use: {
            loader: "file-loader",
            options: {
              name: "images/[name]-[hash:6].[ext]",
              esModule: false, // handle media imports in <template>, e.g <img src="../assets/logo.svg"> (vue/react?)
            }
          }
        },
        {
          test: /\.(ttf|eot|woff2?)$/,
          use: {
            loader: "url-loader",
            options: {
              name: "fonts/[name].[ext]"
            }
          }
        },
        {
          test: /\.s?css$/,
          use: [
            // https://webpack.js.org/plugins/mini-css-extract-plugin/
            isDevelopment ? "style-loader" : MiniCssExtractPlugin.loader,
            {
              loader: "css-loader",
              options: {
                sourceMap: isDevelopment
              },
            },
            {
              loader: "sass-loader",
              options: {
                sourceMap: isDevelopment,
                prependData: `@import "${path.basename(sassCommonVars)}";`,
                sassOptions: {
                  includePaths: [
                    path.dirname(sassCommonVars)
                  ]
                },
              }
            },
          ]
        }
      ]
    },

    plugins: [
      new ForkTsCheckerPlugin(),

      // todo: fix remain warnings about circular dependencies
      // new CircularDependencyPlugin({
      //   cwd: __dirname,
      //   exclude: /node_modules/,
      //   allowAsyncCycles: true,
      //   failOnError: false,
      // }),

      // todo: check if this actually works in mode=production files
      // new webpack.DllReferencePlugin({
      //   context: process.cwd(),
      //   manifest: manifestPath,
      //   sourceType: libraryTarget,
      // }),

      new HtmlWebpackPlugin({
        filename: `${appName}.html`,
        template: htmlTemplate,
        inject: true,
      }),

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

      isDevelopment && new webpack.HotModuleReplacementPlugin(),
      isDevelopment && new ReactRefreshWebpackPlugin(),

    ].filter(Boolean),
  };
}