/**
 * Booking-window timings sourced from the train_scheduling_global_rules singleton,
 * with hardcoded fallbacks when the row is missing (see TrainSchedulingService.getWindowConfig).
 */
export interface BookingWindowConfig {
  /** Days before departure the single import booking-window day falls on. */
  importWindowLeadDays: number;
  /** Hours before departure an export booking becomes acceptable (FCFS). */
  exportBookingLeadHours: number;
  /** Local (Africa/Addis_Ababa) hour at which the import window opens each day. */
  windowOpenHour: number;
  /**
   * Local (Africa/Addis_Ababa) hour the booking desk shuts for the day: once a
   * cycle's reopen would fall at/after this hour, the window pauses and resumes
   * next morning at windowOpenHour. Equal to windowOpenHour ⇒ 24-hour desk.
   */
  windowCloseHour: number;
  windowDurationHours: number;
  /** Max staff document-review time after the window closes. */
  docReviewMinutes: number;
  /** Pay window for IMPORT/DOMESTIC bookings (also part of the reopen gap). */
  paymentWindowMinutes: number;
  /** Pay window for EXPORT bookings — independent of the import value. */
  exportPaymentWindowMinutes: number;
  /**
   * Minutes before departure the IMPORT/DOMESTIC booking window shuts. When set
   * (> 0), the effective booking cutoff is `departure − this`, capping the first
   * window close and every reopen cycle. NULL/0 ⇒ no offset (close at departure).
   */
  importCloseOffsetMinutes?: number | null;
  /**
   * Minutes before departure the EXPORT FCFS booking window shuts. When set (> 0),
   * export closes at `departure − this` instead of at departure. NULL/0 ⇒ none.
   */
  exportCloseOffsetMinutes?: number | null;
}

/** Window phase lifecycle for the one-booking-day import cycle. NULL on legacy/DOMESTIC schedules. */
export const WINDOW_PHASES = [
  'PRE_WINDOW',
  'OPEN',
  'DOC_REVIEW',
  'PAYMENT',
  'CLOSED_FOR_DAY',
  'DONE',
] as const;

export type WindowPhase = (typeof WINDOW_PHASES)[number];