import { describe, expect, it, vi, beforeEach, afterEach } from "vitest"
import { act, renderHook } from "@testing-library/react"

import { useStagedGreeting } from "./use-staged-greeting"

/**
 * Two things are worth pinning, because breaking either one is what made the
 * greeting invisible before: it must not fire in the mount frame, and it must
 * let go afterwards so a hover can still move the star.
 */
describe("useStagedGreeting", () => {
  beforeEach(() => {
    vi.useFakeTimers()
  })

  afterEach(() => {
    vi.useRealTimers()
  })

  it("does not greet in the mount frame", () => {
    const { result } = renderHook(() => useStagedGreeting(true))
    expect(result.current).toBe(false)
  })

  it("greets inside the chip's opening beat, not before it", () => {
    // The box starts widening 140ms in and takes 380ms (`globals.css`), so the
    // gesture has to have started by then and still be running while it moves.
    const { result } = renderHook(() => useStagedGreeting(true))

    act(() => {
      vi.advanceTimersByTime(160)
    })
    expect(result.current).toBe(true)

    act(() => {
      vi.advanceTimersByTime(360)
    })
    expect(result.current).toBe(true)
  })

  it("lets go, so hover is a state change again", () => {
    const { result } = renderHook(() => useStagedGreeting(true))

    act(() => {
      vi.advanceTimersByTime(160 + 600)
    })

    expect(result.current).toBe(false)
  })

  it("stays still when there is no arrival to ride", () => {
    const { result } = renderHook(() => useStagedGreeting(false))

    act(() => {
      vi.advanceTimersByTime(10_000)
    })

    expect(result.current).toBe(false)
  })

  it("drops its timers on unmount", () => {
    const clear = vi.spyOn(window, "clearTimeout")
    const { unmount } = renderHook(() => useStagedGreeting(true))

    unmount()

    expect(clear).toHaveBeenCalled()
    clear.mockRestore()
  })
})