import { describe, expect, it } from 'vitest'
import { calculateBookingTotalDays, normalizeOptionalText, resolveReturnLocation } from './BookingForm'

describe('BookingForm helpers', () => {
  it('calculates booking nights from date-only inputs', () => {
    expect(calculateBookingTotalDays('2026-06-09', '2026-06-10')).toBe(1)
    expect(calculateBookingTotalDays('2026-06-09', '2026-06-16')).toBe(7)
  })

  it('never returns a negative total for reversed or incomplete dates', () => {
    expect(calculateBookingTotalDays('2026-06-16', '2026-06-09')).toBe(0)
    expect(calculateBookingTotalDays('', '2026-06-09')).toBe(0)
    expect(calculateBookingTotalDays('2026-06-09', '')).toBe(0)
  })

  it('uses pickup location for same-location returns', () => {
    expect(resolveReturnLocation({ dropoffMode: 'same', pickupLocation: 'Marrakesh Airport', returnLocation: 'Casablanca' })).toBe('Marrakesh Airport')
  })

  it('uses the explicit return location for different dropoffs and preserves an unset optional value', () => {
    expect(resolveReturnLocation({ dropoffMode: 'different', pickupLocation: 'Marrakesh', returnLocation: 'Casablanca' })).toBe('Casablanca')
    expect(resolveReturnLocation({ dropoffMode: 'different', pickupLocation: 'Marrakesh', returnLocation: '' })).toBeUndefined()
  })

  it('normalizes optional free-text fields without leaking empty strings into payloads', () => {
    expect(normalizeOptionalText('  flight lands at 9  ')).toBe('flight lands at 9')
    expect(normalizeOptionalText('   ')).toBeUndefined()
  })
})