const path = require('path');
const HtmlWebpackPlugin = require("html-webpack-plugin");
const webpack = require('webpack');
const dotenv = require('dotenv');

module.exports = () => {
  const env = dotenv.config().parsed;
  const envKeys = Object.keys(env).reduce((prev, next) => {
    prev[`process.env.${next}`] = JSON.stringify(env[next]);
    return prev;
  }, {});

  return {
    entry: './src/index.tsx',
    target: 'web',
    mode: 'development',
    module: {
      rules: [
        {
          test: /\.(ts|tsx)$/,
          loader: "ts-loader",
        },
        {
          enforce: "pre",
          test: /\.js$/,
          loader: "source-map-loader",
        },
        {
          test: /\.(png|svg|jpg|gif|mp3)$/,
          use: [
            'file-loader'
          ]
        },
        { test: /\.css$/, use: [ 'css-loader' ] },
        {
          test: /\.(woff(2)?|ttf|eot)(\?v=\d+\.\d+\.\d+)?$/,
          use: [
            {
              loader: 'file-loader',
              options: {
                name: '[name].[ext]',
                outputPath: 'fonts/'
              }
            }
          ]
        }
      ],
    },
    resolve: {
      extensions: ['*', '.tsx', '.ts', '.js', '.jsx', '.json'],
    },
    output: {
      filename: 'bundle.js',
      path: path.resolve(__dirname, 'build'),
      publicPath: '/'
    },
    devServer: {
      historyApiFallback: true,
    },
    plugins: [
      new HtmlWebpackPlugin({
        template: path.resolve(__dirname, "src", "index.html"),
      }),
      new webpack.DefinePlugin(envKeys)
    ]
  }
};