const { resolve } = require('path')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const { BundleAnalyzerPlugin } = require('webpack-bundle-analyzer')
const { VueLoaderPlugin } = require('vue-loader')
const webpack = require('webpack')

const outputPath = resolve(__dirname, 'playground_dist')

/** @type {import('webpack').ConfigurationFactory} */
const config = (env = {}) => {
  const extraPlugins = env.prod ? [new BundleAnalyzerPlugin()] : []

  return {
    mode: env.prod ? 'production' : 'development',
    devtool: env.prod ? 'source-map' : 'inline-source-map',

    devServer: {
      contentBase: outputPath,
      historyApiFallback: true,
      hot: true,
      stats: 'minimal',
    },

    output: {
      path: outputPath,
      publicPath: '/',
      filename: 'bundle.js',
    },

    entry: [resolve(__dirname, 'playground/main.ts')],
    module: {
      rules: [
        {
          test: /\.css$/i,
          use: ['style-loader', 'css-loader'],
        },
        {
          test: /\.ts$/,
          use: {
            loader: 'ts-loader',
            options: { appendTsSuffixTo: [/\.vue$/] },
          },
        },
        {
          test: /\.vue$/,
          use: 'vue-loader',
        },
      ],
    },
    resolve: {
      alias: {
        // this isn't technically needed, since the default `vue` entry for bundlers
        // is a simple `export * from '@vue/runtime-dom`. However having this
        // extra re-export somehow causes webpack to always invalidate the module
        // on the first HMR update and causes the page to reload.
        vue: '@vue/runtime-dom',
      },
      // Add `.ts` and `.tsx` as a resolvable extension.
      extensions: ['.ts', 'd.ts', '.tsx', '.js', '.vue'],
    },
    plugins: [
      new VueLoaderPlugin(),
      new HtmlWebpackPlugin({
        template: resolve(__dirname, 'playground/index.html'),
      }),
      new webpack.DefinePlugin({
        __DEV__: JSON.stringify(!env.prod),
        __BROWSER__: 'true',
        'process.env': {
          NODE_ENV: JSON.stringify(process.env.NODE_ENV),
        },
      }),
      ...extraPlugins,
    ],
  }
}

module.exports = config