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

module.exports = {
  mode: 'production',
  entry: './client/src/index.js',
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: 'js/[name].[contenthash].js',
    chunkFilename: 'js/[name].[contenthash].chunk.js',
    publicPath: '/',
    clean: true, // Clean dist folder before build
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env', '@babel/preset-react'],
          },
        },
      },
      {
        test: /\.css$/,
        use: ['style-loader', 'css-loader'],
      },
    ],
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: './client/public/index.html',
      templateParameters: {
        REACT_APP_GOOGLE_CLIENT_ID: process.env.GOOGLE_CLIENT_ID || 'your_google_client_id_here',
      },
      minify: {
        removeComments: true,
        collapseWhitespace: true,
        removeRedundantAttributes: true,
        useShortDoctype: true,
        removeEmptyAttributes: true,
        removeStyleLinkTypeAttributes: true,
        keepClosingSlash: true,
        minifyJS: true,
        minifyCSS: true,
        minifyURLs: true,
      },
    }),
    new webpack.DefinePlugin({
      'process.env': {
        NODE_ENV: JSON.stringify('production'),
        REACT_APP_GOOGLE_CLIENT_ID: JSON.stringify(process.env.GOOGLE_CLIENT_ID),
      },
    }),
  ],
  optimization: {
    splitChunks: {
      chunks: 'all',
      cacheGroups: {
        vendor: {
          test: /[\\/]node_modules[\\/]/,
          name: 'vendors',
          chunks: 'all',
        },
      },
    },
  },
  resolve: {
    extensions: ['.js', '.jsx'],
  },
  performance: {
    maxAssetSize: 512000,
    maxEntrypointSize: 512000,
  },
};