const fs = require('fs')
const path = require('path')

const check = process.argv.includes('--check')

const dictsPath = path.resolve(__dirname, '..', '..', 'third_party', 'hunspell_dictionaries')
const gclientPath = 'third_party/hunspell_dictionaries'

const allFiles = fs.readdirSync(dictsPath)

const dictionaries = allFiles
  .filter(file => path.extname(file) === '.bdic')

const licenses = allFiles
  .filter(file => file.startsWith('LICENSE') || file.startsWith('COPYING'))

const content = `hunspell_dictionaries = [
  ${dictionaries.map(f => `"//${path.posix.join(gclientPath, f)}"`).join(',\n  ')},
]

hunspell_licenses = [
  ${licenses.map(f => `"//${path.posix.join(gclientPath, f)}"`).join(',\n  ')},
]
`

const filenamesPath = path.resolve(__dirname, '..', 'filenames.hunspell.gni')

if (check) {
  const currentContent = fs.readFileSync(filenamesPath, 'utf8')
  if (currentContent !== content) {
    throw new Error('hunspell filenames need to be regenerated, latest generation does not match current file.  Please run node gen-hunspell-filenames.js')
  }
} else {
  fs.writeFileSync(filenamesPath, content)
}