export const DEFAULT_NOTIFICATION_SETTINGS = Object.freeze({
  newNews: false,
  newEvents: false,
  eventsToday: false,
  eventsTomorrow: false,
  ownTeamMatches: false,
  allTeamMatches: false,
  birthdays: false,
  newContactRequest: false,
  newUserRegistration: false,
  selectedTeamSlugs: [],
  selectedTeamSeason: null,
  notificationTime: '09:00'
})

function coerceBoolean(value) {
  return value === true
}

export function sanitizeNotificationSettings(input = {}) {
  const selectedTeamSlugs = Array.isArray(input.selectedTeamSlugs)
    ? input.selectedTeamSlugs
      .map(value => String(value || '').trim())
      .filter(Boolean)
      .slice(0, 50)
    : []
  const selectedTeamSeason = typeof input.selectedTeamSeason === 'string' && input.selectedTeamSeason.trim()
    ? input.selectedTeamSeason.trim().slice(0, 30)
    : null
  const notificationTime = /^([01]\d|2[0-3]):[0-5]\d$/.test(String(input.notificationTime || ''))
    ? String(input.notificationTime)
    : DEFAULT_NOTIFICATION_SETTINGS.notificationTime

  return {
    newNews: coerceBoolean(input.newNews),
    newEvents: coerceBoolean(input.newEvents),
    eventsToday: coerceBoolean(input.eventsToday),
    eventsTomorrow: coerceBoolean(input.eventsTomorrow),
    ownTeamMatches: coerceBoolean(input.ownTeamMatches),
    allTeamMatches: coerceBoolean(input.allTeamMatches),
    birthdays: coerceBoolean(input.birthdays),
    newContactRequest: coerceBoolean(input.newContactRequest),
    newUserRegistration: coerceBoolean(input.newUserRegistration),
    selectedTeamSlugs: [...new Set(selectedTeamSlugs)],
    selectedTeamSeason,
    notificationTime
  }
}

export function notificationSettingsForUser(user) {
  return sanitizeNotificationSettings({
    ...DEFAULT_NOTIFICATION_SETTINGS,
    ...(user?.notificationSettings || user?.notifications || {})
  })
}