const path = require('path')

const __DEV__ = (global.__DEV__ = process.env.NODE_ENV === 'development')

const PRESET_STAGE_0 = ['@babel/preset-stage-0', { decoratorsLegacy: true }]

const PLUGIN_ALIAS = [
  'babel-plugin-module-resolver',
  {
    root: ['./src'],
    alias: {
      '#utilities': './src/utilities',
      '#certificate': './src/certificate',
      '#middleware': './src/middleware',
      '#routes': './src/routes',
    },
  },
]

module.exports = (api) => {
  api.cache(false)

  const presets = [
    [
      '@babel/preset-env',
      {
        targets: {
          node: 9,
        },
      },
    ],
    '@babel/preset-flow',
    PRESET_STAGE_0,
  ]

  return {
    presets,
    plugins: ['babel-plugin-dev-expression', PLUGIN_ALIAS, '@babel/plugin-proposal-object-rest-spread'],
  }
}