var path = require("path");
var LEGACY = process.env.LEGACY;
var MINIMIZE = process.env.MINIMIZE === "true";
var hostname = "localhost";
var port = 8080;

var filename = "[name]";
var sourceMapFilename = "[name]";
if (LEGACY) {
  filename += ".legacy";
}
if (MINIMIZE) {
  filename += ".min.js";
  sourceMapFilename += ".min.js.map";
} else {
  filename += ".js";
  sourceMapFilename += ".js.map";
}

module.exports = {
  mode: process.env.NODE_ENV,
  entry: {
    epub: "./src/epub.js",
  },
  devtool: MINIMIZE ? false : "source-map",
  output: {
    path: path.resolve("./dist"),
    filename: filename,
    sourceMapFilename: sourceMapFilename,
    library: "ePub",
    libraryTarget: "umd",
    libraryExport: "default",
    publicPath: "/dist/",
  },
  optimization: {
    minimize: MINIMIZE,
  },
  externals: {
    "jszip/dist/jszip": "JSZip",
    xmldom: "xmldom",
  },
  plugins: [],
  resolve: {
    alias: {
      path: "path-webpack",
    },
  },
  devServer: {
    host: hostname,
    port: port,
    inline: true,
    headers: {
      "Access-Control-Allow-Origin": "*",
      "Access-Control-Allow-Methods": "GET,PUT,POST,DELETE",
      "Access-Control-Allow-Headers": "Content-Type",
    },
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: "babel-loader",
          options: {
            presets: [
              [
                "@babel/preset-env",
                {
                  targets: LEGACY
                    ? "defaults"
                    : "last 2 Chrome versions, last 2 Safari versions, last 2 ChromeAndroid versions, last 2 iOS versions, last 2 Firefox versions, last 2 Edge versions",
                  corejs: 3,
                  useBuiltIns: "usage",
                  bugfixes: true,
                  modules: false,
                },
              ],
            ],
          },
        },
      },
    ],
  },
  performance: {
    hints: false,
  },
};