/**
 * Swedish parental leave rule constants.
 *
 * These values mirror backend/app/config.py::LeaveRules and must be kept in sync.
 * They are the authoritative source for the domain rules governing föräldrapenning,
 * dubbeldagar, age-4 restrictions, and SGI protection.
 *
 * NOTE: These figures are common-case defaults. Children born before 2014, multiples
 * (tvillingtillägg), and single-custody arrangements differ and should become
 * configurable when tackled. Update both frontend and backend together.
 *
 * @see backend/app/config.py#LeaveRules
 * @see ARCHITECTURE.md#1
 */

export const LEAVE_RULES = {
  // Total föräldrapenning entitlement and tier breakdown
  totalDaysPerChild: 480,
  sjukpenningDays: 390, // income-based tier
  lagstaNivaDays: 90, // flat low-rate tier

  // Default joint-custody split (per parent)
  daysPerParent: 240,
  reservedDaysPerParent: 90, // non-transferable ("reserverade dagar")

  // Derived: transferable days per parent (240 - 90)
  get transferableDaysPerParent(): number {
    return this.daysPerParent - this.reservedDaysPerParent;
  },

  // Dubbeldagar: both parents taking leave for the same child on the same day
  maxDubbeldagar: 60,
  dubbeldagarMonthsLimit: 15, // only within the child's first 15 months

  // Age-4 rule: max 96 days may be saved after the child's 4th birthday
  maxSavableDaysAtAge4: 96,
  hardExpiryAgeYears: 12,

  // SGI protection and minimum work intensity
  sgiProtectedFirstMonths: 12, // protected regardless of days taken
  sgiMinDaysPerWeekAfterAge1: 5, // minimum to maintain SGI after age 1

  // Default reserve for preschool planning days ("studiedagar") closures
  preschoolPlanningDaysPerYear: 6,

  // Statutory Swedish vacation days
  vacationDaysPerYear: 25,
} as const;

/**
 * Försäkringskassan's BankID login page, carrying a `goto` fragment so the
 * user lands on the "Min föräldrapenning" e-service after authenticating —
 * the page that shows "Dagar ni kan föra över" and where a transfer between
 * parents is actually made. Mirrors the URL shapes in
 * `backend/app/scrapers/fk_scraper.py` (`LOGIN_URL` / `MIN_FP_URL`); keep in
 * sync if FK moves the e-service.
 *
 * @see backend/app/scrapers/fk_scraper.py#LOGIN_URL
 */
export const FK_TRANSFER_LOGIN_URL =
  'https://www.forsakringskassan.se/privatperson/logga-in' +
  '#/?goto=%2Fprivatperson%2Fmina-sidor%2Falla-e-tjanster%2Fmin-foraldrapenning';