const SHARED_GAME_CHAPTERS = new Set([1])

function normalizeChapterNumber(value) {
  const number = Number(value)
  if (!Number.isFinite(number)) return 1
  return Math.min(15, Math.max(1, Math.floor(number)))
}

function chapterPackageRoot(value) {
  const chapter = normalizeChapterNumber(value)
  if (SHARED_GAME_CHAPTERS.has(chapter)) return 'package-game'
  return `package-chapter-${String(chapter).padStart(2, '0')}`
}

function chapterRoute(value, options = {}) {
  const chapter = normalizeChapterNumber(value)
  const replay = options && options.replay === true ? '&replay=1' : ''
  return `/${chapterPackageRoot(chapter)}/pages/chapter/chapter?chapter=${chapter}${replay}`
}

module.exports = {
  normalizeChapterNumber,
  chapterPackageRoot,
  chapterRoute,
}