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

import { addReturnTo, buildNotificationActionPath, getSafeReturnTo, isSafeInternalNavigationPath } from '@/lib/notificationNavigation'

describe('notification navigation policy', () => {
  it('adds the notifications return path while preserving destination query parameters', () => {
    expect(buildNotificationActionPath('/my-events/event-1/manage?tab=attendance')).toBe(
      '/my-events/event-1/manage?tab=attendance&returnTo=%2Fprofile%2Fnotifications'
    )
  })

  it.each(['https://example.com/path', '//example.com/path', '/\\example.com/path'])('rejects an unsafe or external path: %s', (path) => {
    expect(isSafeInternalNavigationPath(path)).toBe(false)
    expect(buildNotificationActionPath(path)).toBeNull()
  })

  it('only returns a safe internal return destination', () => {
    expect(getSafeReturnTo('?returnTo=%2Fprofile%2Fnotifications')).toBe('/profile/notifications')
    expect(getSafeReturnTo('?returnTo=%2F%2Fexample.com')).toBeNull()
  })

  it('does not append an unsafe return destination', () => {
    expect(addReturnTo('/bookings/1', '//example.com')).toBeNull()
  })
})