const path = require('path')
const nodeExternals = require('webpack-node-externals')
const webpack = require('webpack')

const UglifyJSPlugin = require('uglifyjs-webpack-plugin')

// process.env.NODE_ENV = 'production'
module.exports = () => {
  return {
    target: 'node',
    // devtool: 'inline-source-map',
    devtool: 'none',
    mode: 'production',
    /**
     * @NOTE - THIS IS DIFFERENT THAN DEV - WE EXPORT ONLY THE APP
     */
    entry: './src/app.ts',
    output: {
      /**
       * @todo prod build for commonjs in a different file - export 2 webpack configs
       */
      // libraryTarget: process.env.IS_STANDALONE_GRAPHQL ? 'var' : 'commonjs',
      libraryTarget: 'commonjs',
      path: path.resolve('./dist'),
      filename: 'server.js',
    },
    externals: nodeExternals(),
    module: {
      rules: [
        {
          // exclude: /node_modules/,
          test: /\.graphql$/,
          use: [{ loader: 'graphql-import-loader' }],
        },
        {
          test: /\.t|jsx?$/,
          // exclude: /node_modules/,
          use: [
            {
              loader: require.resolve('ts-loader'),
              options: {
                // disable type checker - we will use it in fork plugin
                transpileOnly: true,
                // https://github.com/TypeStrong/ts-loader#ignorediagnostics-number-default
              },
            },
            // options: {cacheDirectory: true},
          ],
        },
      ],
    },
    resolve: {
      mainFields: ['main', 'module'],
      extensions: ['.js', '.ts', '.json'],
    },
  }
}