#!/usr/bin/env tsx
import fs from 'fs'
import glob from 'glob'
import { mkdirp } from 'mkdirp'
import path from 'path'
import { TransifexStringChrome, TransifexStrings } from './lib/transifex-formats.mts'

const args = process.argv.slice(2)

if (!args.length) {
  process.stdout.write('You must specify the messages dir generated by babel-plugin-react-intl.\n')
  process.exit(1)
}

const MESSAGES_PATTERN = args.shift() + '/**/*.json'

const LANG_DIR = args.shift()
if (!LANG_DIR) {
  process.stdout.write('A destination directory must be specified.\n')
  process.exit(1)
}

interface Descriptor {
  id: string
  description: string
  defaultMessage: string
}

// Aggregates the default messages that were extracted from the example app's
// React components via the React Intl Babel plugin. An error will be thrown if
// there are messages in different components that use the same `id`. The result
// is a chromei18n format collection of `id: {message: defaultMessage,
// description: description}` pairs for the app's default locale.
const defaultMessages = glob
  .sync(MESSAGES_PATTERN)
  .map(filename => fs.readFileSync(filename, 'utf8'))
  .map(file => JSON.parse(file) as Descriptor[])
  .reduce((collection: TransifexStrings<TransifexStringChrome>, descriptors) => {
    descriptors.forEach(({ id, defaultMessage, description }) => {
      if (Object.prototype.hasOwnProperty.call(collection, id)) {
        throw new Error(`Duplicate message id: ${id}`)
      }

      collection[id] = { message: defaultMessage, description: description }
    })

    return collection
  }, {})

mkdirp.sync(LANG_DIR)
fs.writeFileSync(path.join(LANG_DIR, 'en.json'), JSON.stringify(defaultMessages, null, 2))