export type BookingMode = 'table' | 'seat'
export type TicketType = 'vip' | 'supporter'
export type BookingStatus = 'pending' | 'confirmed'

export const DINNER_EVENT_TITLE = 'DAP JOHOR 60th Anniversary Celebration'
export const DINNER_EVENT_DATE_LABEL = 'Saturday, 30 May 2026'
export const DINNER_EVENT_TIME_LABEL = '6:30 PM'
export const DINNER_EVENT_VENUE = "Yong Peng's Chee Ann Kor"

export const TABLE_SEAT_COUNT = 10

export const BOOKING_MODE_OPTIONS = [
  {
    value: 'table',
    label: `Table (${TABLE_SEAT_COUNT} seats)`
  },
  {
    value: 'seat',
    label: 'Seat'
  }
] satisfies Array<{ value: BookingMode, label: string }>

export const BOOKING_TICKET_CATALOG = [
  {
    value: 'vip',
    label: 'VIP',
    description: 'RM150 / seat',
    price: 150
  },
  {
    value: 'supporter',
    label: 'Supporter',
    description: 'RM60 / seat',
    price: 60
  }
] satisfies Array<{ value: TicketType, label: string, description: string, price: number }>

export interface PublicBooking {
  id: string
  confirmationToken: string
  receiptToken: string
  customerName: string
  customerPhone: string
  bookingMode: BookingMode
  quantity: number
  seatCount: number
  ticketType: TicketType
  unitPrice: number
  totalPrice: number
  personInChargeId: string
  personInChargeName: string
  personInChargePhoneNumber: string
  status: BookingStatus
  createdAt: string
  confirmedAt: string | null
}

export interface ReceiptBooking {
  id: string
  receiptToken: string
  customerName: string
  customerPhone: string
  bookingMode: BookingMode
  quantity: number
  seatCount: number
  ticketType: TicketType
  unitPrice: number
  totalPrice: number
  status: BookingStatus
  createdAt: string
  confirmedAt: string | null
}

export interface PublicBookingSeat {
  id: string
  seatNumber: number
  seatToken: string
  recipientName: string | null
  recipientPhone: string | null
  sharedAt: string | null
  createdAt: string
  updatedAt: string
}

export interface PublicBookingSeatWithUrl extends PublicBookingSeat {
  seatUrl: string
}

export interface PublicBookingReceipt {
  booking: ReceiptBooking
  receiptUrl: string
  seats: PublicBookingSeatWithUrl[]
}

export interface PublicSeatReceipt {
  booking: ReceiptBooking
  seat: PublicBookingSeatWithUrl
  receiptUrl: string
}

export interface BookingCapacitySettings {
  totalSeats: number | null
  updatedAt: string | null
}

export interface BookingInventorySummary {
  totalSeats: number | null
  soldSeats: number
  pendingSeats: number
  leftSeats: number | null
}

export interface CreateBookingResponse {
  booking: PublicBooking
  confirmationUrl: string
  whatsappUrl: string
}

export function isBookingMode(value: string | null | undefined): value is BookingMode {
  return value === 'table' || value === 'seat'
}

export function isTicketType(value: string | null | undefined): value is TicketType {
  return value === 'vip' || value === 'supporter'
}

export function isBookingStatus(value: string | null | undefined): value is BookingStatus {
  return value === 'pending' || value === 'confirmed'
}

export function getBookingModeLabel(value: BookingMode) {
  return value === 'table' ? `Table (${TABLE_SEAT_COUNT} seats each)` : 'Per seat'
}

export function getBookingStatusLabel(value: BookingStatus) {
  return value === 'confirmed' ? 'Confirmed' : 'Pending PIC confirmation'
}

export function getSeatCount(bookingMode: BookingMode, quantity: number) {
  return bookingMode === 'table' ? quantity * TABLE_SEAT_COUNT : quantity
}

export function getTicketCatalogItem(ticketType: TicketType) {
  return BOOKING_TICKET_CATALOG.find((ticket) => ticket.value === ticketType) ?? null
}

export function formatBookingCurrency(value: number) {
  return new Intl.NumberFormat('en-MY', {
    style: 'currency',
    currency: 'MYR',
    minimumFractionDigits: 0,
    maximumFractionDigits: 0
  }).format(value)
}

export function getSeatLabel(seatNumber: number) {
  return `Seat ${seatNumber}`
}

export function calculateBookingInventorySummary(
  bookings: Pick<PublicBooking, 'seatCount' | 'status'>[],
  settings: BookingCapacitySettings
): BookingInventorySummary {
  const soldSeats = bookings
    .filter((booking) => booking.status === 'confirmed')
    .reduce((total, booking) => total + booking.seatCount, 0)

  const pendingSeats = bookings
    .filter((booking) => booking.status === 'pending')
    .reduce((total, booking) => total + booking.seatCount, 0)

  const leftSeats = settings.totalSeats === null ? null : Math.max(settings.totalSeats - soldSeats, 0)

  return {
    totalSeats: settings.totalSeats,
    soldSeats,
    pendingSeats,
    leftSeats
  }
}