import { act, renderHook } from '@testing-library/react'
import { vi } from 'vitest'
import { useTimeout } from '../src/utils/useTimeout'

describe('useTimeout', () => {
  it('fires the callback after the delay', () => {
    vi.useFakeTimers()
    const { result } = renderHook(() => useTimeout())
    const fn = vi.fn()
    act(() => {
      result.current.schedule(fn, 1000)
    })
    expect(fn).not.toHaveBeenCalled()
    act(() => {
      vi.advanceTimersByTime(1000)
    })
    expect(fn).toHaveBeenCalledTimes(1)
    vi.useRealTimers()
  })

  it('clear() cancels pending timers', () => {
    vi.useFakeTimers()
    const { result } = renderHook(() => useTimeout())
    const fn = vi.fn()
    act(() => {
      result.current.schedule(fn, 1000)
      result.current.clear()
    })
    act(() => {
      vi.advanceTimersByTime(5000)
    })
    expect(fn).not.toHaveBeenCalled()
    vi.useRealTimers()
  })

  it('clears pending timers on unmount (no setState-after-unmount leaks)', () => {
    vi.useFakeTimers()
    const { result, unmount } = renderHook(() => useTimeout())
    const fn = vi.fn()
    act(() => {
      result.current.schedule(fn, 1000)
    })
    unmount()
    act(() => {
      vi.advanceTimersByTime(5000)
    })
    expect(fn).not.toHaveBeenCalled()
    vi.useRealTimers()
  })
})