import { DEFAULT_LOCALE, LOCALE } from '../src/routes/_static/intl'

const path = require('path')
const webpack = require('webpack')
const config = require('sapper/config/webpack.js')
const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin
const LodashModuleReplacementPlugin = require('lodash-webpack-plugin')
const terser = require('./terser.config')
const CircularDependencyPlugin = require('circular-dependency-plugin')
const { mode, dev, resolve, inlineSvgs, allSvgs } = require('./shared.config')
const { version } = require('../package.json')

const urlRegex = require('../src/routes/_utils/urlRegexSource.js')()

const output = Object.assign(config.client.output(), {
  // enables HMR in workers
  globalObject: 'this',
  filename: dev ? '[fullhash]/[id].js' : '[id].[contenthash].[name].js',
  chunkFilename: dev ? '[fullhash]/[id].js' : '[id].[contenthash].[name].js'
})

const emojiPickerI18n = LOCALE !== DEFAULT_LOCALE &&
  require(path.join(__dirname, '../src/intl/emoji-picker/', `${LOCALE}.js`)).default

process.on('unhandledRejection', err => {
  // TODO: seems to be a Webpack Bundle Analyzer error we can safely ignore
  if (!err.message.includes('Error: No such label \'done hook\' for WebpackLogger.timeEnd()')) {
    console.error(err)
  }
})

module.exports = {
  entry: config.client.entry(),
  output,
  resolve,
  mode,
  module: {
    rules: [
      {
        test: input => {
          return input.endsWith(path.join('_workers', 'blurhash.js'))
        },
        use: {
          loader: 'worker-loader',
          options: {
            filename: dev ? '[fullhash]/blurhash.[name].js' : 'blurhash.[contenthash].[name].js'
          }
        }
      },
      {
        test: input => {
          return (
            input.endsWith(path.join('tesseract.js', 'dist', 'worker.min.js')) ||
            input.endsWith(path.join('tesseract.js', 'dist', 'worker.min.js.map')) ||
            input.endsWith(path.join('tesseract.js-core', 'tesseract-core.wasm')) ||
            input.endsWith(path.join('tesseract.js-core', 'tesseract-core.wasm.js'))
          )
        },
        use: {
          loader: 'file-loader',
          options: {
            name: dev ? 'tesseract-asset.[name].[ext]' : 'tesseract-asset.[contenthash].[name].[ext]'
          }
        }
      },
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: path.join(__dirname, './svelte-intl-loader.js')
        }
      },
      {
        test: /\.html$/,
        use: [
          {
            loader: 'svelte-loader',
            options: {
              dev,
              hydratable: true,
              store: true,
              hotReload: dev
            }
          },
          {
            loader: path.join(__dirname, './svelte-intl-loader.js')
          }
        ]
      }
    ].filter(Boolean)
  },
  optimization: dev
    ? {}
    : {
        minimize: !process.env.DEBUG,
        minimizer: [
          terser()
        ],
        // TODO: we should be able to enable this, but Sapper breaks if we do so
        // // isolate runtime chunk to avoid excessive cache invalidations https://webpack.js.org/guides/caching/
        // runtimeChunk: 'single',
        splitChunks: {
          chunks: 'async',
          minSize: 5000,
          maxAsyncRequests: Infinity,
          maxInitialRequests: Infinity
        }
      },
  plugins: [
    new webpack.DefinePlugin({
      'process.browser': true,
      'process.env.NODE_ENV': JSON.stringify(mode),
      'process.env.INLINE_SVGS': JSON.stringify(inlineSvgs),
      'process.env.ALL_SVGS': JSON.stringify(allSvgs),
      'process.env.URL_REGEX': urlRegex.toString(),
      'process.env.LOCALE': JSON.stringify(LOCALE),
      'process.env.EMOJI_PICKER_I18N': emojiPickerI18n ? JSON.stringify(emojiPickerI18n) : 'undefined',
      'process.env.PINAFORE_VERSION': JSON.stringify(version),
      'process.env.IS_SERVICE_WORKER': 'false'
    }),
    new webpack.NormalModuleReplacementPlugin(
      /\/_database\/database\.js$/, // this version plays nicer with IDEs
      './database.prod.js'
    ),
    new LodashModuleReplacementPlugin(),
    new CircularDependencyPlugin({
      exclude: /node_modules/,
      failOnError: true,
      cwd: process.cwd()
    })
  ].concat(dev
    ? [
        new webpack.HotModuleReplacementPlugin({
          requestTimeout: 120000
        })
      ]
    : [

        new BundleAnalyzerPlugin({ // generates report.html
          analyzerMode: 'static',
          openAnalyzer: false,
          logLevel: 'silent'
        })
      ]),
  devtool: dev ? 'inline-source-map' : 'source-map',
  performance: {
    hints: dev ? false : (process.env.DEBUG ? 'warning' : 'error'),
    assetFilter: assetFilename => {
      return !(/\.map$/.test(assetFilename)) && !/tesseract-asset/.test(assetFilename)
    }
  }
}