import { describe, expect, it } from 'vitest'

import { calculateCancellationPreview, resolveCancellationTicketPrice } from '@/services/bookings'

describe('booking cancellation preview', () => {
  const startsAt = '2026-09-08T12:00:00.000Z'
  const policy = {
    cancellationFeePercent: 10,
    cancellationFeePercent12To24Hours: 10,
    cancellationFeePercentMoreThan24Hours: 10,
  }

  it('matches the backend floor-based commission formula', () => {
    // 7% mirrors the platform default (backend/src/common/constants/business.constants.ts#COMMISSION_PERCENT);
    // commissionPercent is always passed in from the booking's resolved rate, never hardcoded here.
    expect(calculateCancellationPreview(101_000, policy, 7, startsAt, new Date('2026-09-08T11:00:00Z'))).toEqual({
      ticketPrice: 101_000,
      cancellationFeePercent: 10,
      platformCommission: 707,
      commissionPercent: 7,
      hostCancellationFee: 9_393,
      refundToGuest: 90_900,
    })
  })

  it('does not produce fractional Toman values', () => {
    // A different rate here (5%) than the test above (7%) is deliberate — it
    // exercises an event-level commission override, not just the platform default.
    expect(
      calculateCancellationPreview(999, { ...policy, cancellationFeePercent: 7 }, 5, startsAt, new Date('2026-09-08T11:00:00Z'))
    ).toEqual({
      ticketPrice: 999,
      cancellationFeePercent: 7,
      platformCommission: 3,
      commissionPercent: 5,
      hostCancellationFee: 66,
      refundToGuest: 930,
    })
  })

  it('uses post-discount paid amount so fees match refund.service gross', () => {
    // List 10_000, discount 2_000 → paid 8_000; 10% penalty → refund 7_200.
    expect(calculateCancellationPreview(8_000, policy, 7, startsAt, new Date('2026-09-08T11:00:00Z'))).toEqual({
      ticketPrice: 8_000,
      cancellationFeePercent: 10,
      platformCommission: 56,
      commissionPercent: 7,
      hostCancellationFee: 744,
      refundToGuest: 7_200,
    })
  })

  it('resolves ticket price from payableAmount when a discount was applied', () => {
    expect(resolveCancellationTicketPrice({ eventPrice: 10_000, payableAmount: 8_000 })).toBe(8_000)
    expect(resolveCancellationTicketPrice({ eventPrice: 10_000, payableAmount: null })).toBe(10_000)
  })
})