const { version, name, author } = require('./package.json')
const banner = `/*! ${name} v${version} | ${license || 'MIT'} licensed. | by ${author} */`

// Optional enable some builtin plugins
const plugins = [
  'node-builtins',
  'resolve',
  'typescript',
  'commonjs',
  'babel',
  'globals',
  ['minimize', { output: { beautify: true } }] // plugin with initial options
]

module.exports = {
  plugins: {
    babel (opts, { output: { format } }) {
      const babelrc = { ...opts }
      if ([ 'es', 'cjs' ].includes(format)) {
        babelrc.comments = true
      }
      return babelrc
    },
    resolve (opts, { output: { format } }) {
      return {
        ...opts,
        preferBuiltins: false,
        customResolveOptions: {
          moduleDirectory: /min|umd|iife/.test(format) ? [ 'node_modules' ] : [ 'src' ]
        }
      }
    },
    typescript (opts) {
      return { 
        typescript: require('@allex/typescript'), // custom tsc engine
        compilerOptions: {
          newLine: "lf"
        }
      }
    },
    globals (opts, { output }) {
      return {
        ...opts,
        ...(output.format === 'es' ? {
          process: false,
          buffer: false
        } : {})
      }
    },
    minimize: { // for terser
      ie8: false
    },
    replace: {
      __VERSION__: version
    }
  },
  entry: [
    {
      input: './src/worker/index.ts',
      plugins,
      external: (id, pid, isResolved, next) => {
        return id ==== 'foo' || next(id, true)
      },
      output: [
        { format: 'es', file: 'worker.esm.js' },
        { format: 'umd', file: 'worker.js', name: 'FooWorker', banner }
      ]
    },
    {
      input: './src/app/main.ts',
      plugins: [
        ...plugins, 
        ['minimize', { output: { beautify: true } }]
      ],
      output: [
        { format: 'iife', compress: true, file: 'app/main.js', banner }
      ]
    }
  ]
}