/* eslint-disable filenames/match-exported */
const path = require('path');
const webpack = require('webpack');
const CopyPlugin = require('copy-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const LiveReloadPlugin = require('webpack-livereload-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const TerserPlugin = require('terser-webpack-plugin');

const uiFolder = 'UI';
const frontendFolder = path.join(__dirname, '..');
const srcFolder = path.join(frontendFolder, 'src');
const isProduction = process.argv.indexOf('--production') > -1;
const isProfiling = isProduction && process.argv.indexOf('--profile') > -1;
const inlineWebWorkers = 'no-fallback';

const distFolder = path.resolve(frontendFolder, '..', '_output', uiFolder);

console.log('Source Folder:', srcFolder);
console.log('Output Folder:', distFolder);
console.log('isProduction:', isProduction);
console.log('isProfiling:', isProfiling);

const config = {
  mode: isProduction ? 'production' : 'development',
  devtool: 'source-map',

  stats: {
    children: false
  },

  watchOptions: {
    ignored: /node_modules/
  },

  entry: {
    index: 'index.js'
  },

  resolve: {
    modules: [
      srcFolder,
      path.join(srcFolder, 'Shims'),
      'node_modules'
    ],
    alias: {
      jquery: 'jquery/src/jquery'
    }
  },

  output: {
    path: distFolder,
    publicPath: '/',
    filename: '[name].js',
    sourceMapFilename: '[file].map'
  },

  optimization: {
    moduleIds: 'deterministic',
    chunkIds: 'named',
    splitChunks: {
      chunks: 'initial',
      name: 'vendors'
    }
  },

  performance: {
    hints: false
  },

  plugins: [
    new webpack.DefinePlugin({
      __DEV__: !isProduction,
      'process.env.NODE_ENV': isProduction ? JSON.stringify('production') : JSON.stringify('development')
    }),

    new MiniCssExtractPlugin({
      filename: 'Content/styles.css'
    }),

    new HtmlWebpackPlugin({
      template: 'frontend/src/index.html',
      filename: 'index.html',
      publicPath: '/'
    }),

    new CopyPlugin({
      patterns: [
        // HTML
        {
          from: 'frontend/src/*.html',
          to: path.join(distFolder, '[name][ext]'),
          globOptions: {
            ignore: ['**/index.html']
          }
        },

        // Fonts
        {
          from: 'frontend/src/Content/Fonts/*.*',
          to: path.join(distFolder, 'Content/Fonts', '[name][ext]')
        },

        // Icon Images
        {
          from: 'frontend/src/Content/Images/Icons/*.*',
          to: path.join(distFolder, 'Content/Images/Icons', '[name][ext]')
        },

        // Images
        {
          from: 'frontend/src/Content/Images/*.*',
          to: path.join(distFolder, 'Content/Images', '[name][ext]')
        },

        // Robots
        {
          from: 'frontend/src/Content/robots.txt',
          to: path.join(distFolder, 'Content', '[name][ext]')
        }
      ]
    }),

    new LiveReloadPlugin()
  ],

  resolveLoader: {
    modules: [
      'node_modules',
      'frontend/build/webpack/'
    ]
  },

  module: {
    rules: [
      {
        test: /\.worker\.js$/,
        use: {
          loader: 'worker-loader',
          options: {
            filename: '[name].js',
            inline: inlineWebWorkers
          }
        }
      },
      {
        test: /\.js?$/,
        exclude: /(node_modules|JsLibraries)/,
        use: [
          {
            loader: 'babel-loader',
            options: {
              configFile: `${frontendFolder}/babel.config.js`,
              envName: isProduction ? 'production' : 'development',
              presets: [
                [
                  '@babel/preset-env',
                  {
                    modules: false,
                    loose: true,
                    debug: false,
                    useBuiltIns: 'entry',
                    corejs: 3
                  }
                ]
              ]
            }
          }
        ]
      },

      // CSS Modules
      {
        test: /\.css$/,
        exclude: /(node_modules|globals.css)/,
        use: [
          { loader: MiniCssExtractPlugin.loader },
          {
            loader: 'css-loader',
            options: {
              importLoaders: 1,
              modules: {
                localIdentName: '[name]/[local]/[hash:base64:5]'
              }
            }
          },
          {
            loader: 'postcss-loader',
            options: {
              postcssOptions: {
                config: 'frontend/postcss.config.js'
              }
            }
          }
        ]
      },

      // Global styles
      {
        test: /\.css$/,
        include: /(node_modules|globals.css)/,
        use: [
          'style-loader',
          {
            loader: 'css-loader'
          }
        ]
      },

      // Fonts
      {
        test: /\.woff(2)?(\?v=[0-9]\.[0-9]\.[0-9])?$/,
        use: [
          {
            loader: 'url-loader',
            options: {
              limit: 10240,
              mimetype: 'application/font-woff',
              emitFile: false,
              name: 'Content/Fonts/[name].[ext]'
            }
          }
        ]
      },

      {
        test: /\.(ttf|eot|eot?#iefix|svg)(\?v=[0-9]\.[0-9]\.[0-9])?$/,
        use: [
          {
            loader: 'file-loader',
            options: {
              emitFile: false,
              name: 'Content/Fonts/[name].[ext]'
            }
          }
        ]
      }
    ]
  }
};

if (isProfiling) {
  config.resolve.alias['react-dom$'] = 'react-dom/profiling';
  config.resolve.alias['scheduler/tracing'] = 'scheduler/tracing-profiling';

  config.optimization.minimizer = [
    new TerserPlugin({
      cache: true,
      parallel: true,
      sourceMap: true, // Must be set to true if using source-maps in production
      terserOptions: {
        mangle: false,
        keep_classnames: true,
        keep_fnames: true
      }
    })
  ];
}

module.exports = config;
/* eslint-enable filenames/match-exported */