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

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

describe('booking cancellation preview', () => {
  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, 10, 7)).toEqual({
      ticketPrice: 101_000,
      platformCommission: 7_070,
      commissionPercent: 7,
      hostCancellationFee: 10_100,
      refundToGuest: 83_830,
    })
  })

  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, 7, 5)).toEqual({
      ticketPrice: 999,
      platformCommission: 49,
      commissionPercent: 5,
      hostCancellationFee: 69,
      refundToGuest: 881,
    })
  })

  it('uses post-discount paid amount so fees match refund.service gross', () => {
    // List 10_000, discount 2_000 → paid 8_000; 7% + 10% → refund 6_640
    expect(calculateCancellationPreview(8_000, 10, 7)).toEqual({
      ticketPrice: 8_000,
      platformCommission: 560,
      commissionPercent: 7,
      hostCancellationFee: 800,
      refundToGuest: 6_640,
    })
  })

  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)
  })
})