/**
 * 25-quicktime — QuickTime 播放器 深层测试
 *
 * 使用 vitest 原汁原味的 vi.mock() + window mock 模式。
 * jsdom 不支持 video.play()/pause() API，通过 mock 避免 unhandled errors。
 */
import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest'
import { mount } from '@vue/test-utils'
import { nextTick } from 'vue'
import QuickTimeComponent from '../../src/apps/quicktime/QuickTime.vue'
import { setupDOM } from '../helpers'

// ============================================================
// Mock 依赖模块
// ============================================================
vi.mock('../../src/composables/useBus', () => ({
  bus: { on: vi.fn(), off: vi.fn(), emit: vi.fn() },
}))

vi.mock('../../src/composables/useWM', () => ({
  wm: { setTitle: vi.fn() },
}))

// ============================================================
// Mock window.Sys（QuickTime 通过 const Sys = () => (window as any).Sys 访问）
// ============================================================
function setupSysMock() {
  (window as any).Sys = {
    settings: { volume: 0.6, muted: false },
    save: vi.fn(),
    applyVolume: vi.fn(),
    registerMedia: vi.fn(),
    unregisterMedia: vi.fn(),
  }
}

// ============================================================
// Mock HTMLVideoElement 方法（jsdom 不支持）
// ============================================================
function setupVideoMock() {
  // 始终覆盖 play/pause/load，无论之前是否已设置
  const mockPlay = vi.fn(() => Promise.resolve())
  const mockPause = vi.fn()
  const mockLoad = vi.fn()

  Object.defineProperty(HTMLMediaElement.prototype, 'play', {
    value: mockPlay, configurable: true, writable: true,
  })
  Object.defineProperty(HTMLMediaElement.prototype, 'pause', {
    value: mockPause, configurable: true, writable: true,
  })
  Object.defineProperty(HTMLMediaElement.prototype, 'load', {
    value: mockLoad, configurable: true, writable: true,
  })
}

// ============================================================
// 辅助函数
// ============================================================
function makeMockWin() {
  const el = document.createElement('div')
  el.className = 'window'
  document.getElementById('window-layer')?.appendChild(el)
  const body = document.createElement('div')
  body.className = 'win-body'
  el.appendChild(body)
  return { id: 'qt', appId: 'quicktime', el, body, timers: [] as any[], data: {} }
}

describe('25-quicktime — QuickTime 播放器', () => {
  let win: ReturnType<typeof makeMockWin>

  beforeAll(() => {
    setupVideoMock()
  })

  beforeEach(() => {
    vi.clearAllMocks()
    setupDOM()
    setupSysMock()
    win = makeMockWin()
  })

  afterEach(() => {
    win.el.remove()
  })

  function mountComponent() {
    return mount(QuickTimeComponent, {
      props: { win },
      attachTo: win.body,
    })
  }

  function getAppState() {
    return win.appState
  }

  // ==================== 结构 ====================
  describe('结构', () => {
    it('播放器完整结构', () => {
      mountComponent()
      expect(win.body.querySelector('.qt-stage')).toBeTruthy()
      expect(win.body.querySelector('.qt-controls')).toBeTruthy()
    })

    it('3 个控制按钮', () => {
      mountComponent()
      expect(win.body.querySelectorAll('.qt-btn')).toHaveLength(3)
    })

    it('进度条和音量存在', () => {
      mountComponent()
      expect(win.body.querySelector('.qt-seek')).toBeTruthy()
      expect(win.body.querySelector('.qt-vol')).toBeTruthy()
    })

    it('时间显示初始值', () => {
      mountComponent()
      expect(win.body.querySelectorAll('.music-time')).toHaveLength(2)
    })
  })

  // ==================== 导航 ====================
  describe('导航', () => {
    it('nav(1) 切换不抛错', async () => {
      mountComponent()
      expect(() => getAppState().nav(1)).not.toThrow()
      await nextTick()
      expect(win.body.querySelector('.qt-stage')).toBeTruthy()
    })

    it('nav(-1) 循环不抛错', async () => {
      mountComponent()
      expect(() => getAppState().nav(-1)).not.toThrow()
      await nextTick()
      expect(win.body.querySelector('.qt-stage')).toBeTruthy()
    })

    it('连续 nav 不抛错', async () => {
      mountComponent()
      for (let i = 0; i < 3; i++) {
        expect(() => getAppState().nav(1)).not.toThrow()
        await nextTick()
      }
      expect(win.body.querySelector('.qt-stage')).toBeTruthy()
    })
  })

  // ==================== 控制 ====================
  describe('控制', () => {
    it('toggle 存在且可调用', () => {
      mountComponent()
      const appState = getAppState()
      expect(typeof appState.toggle).toBe('function')
      // video.play() 已 mock 为返回 Promise.resolve()
      expect(() => appState.toggle()).not.toThrow()
    })

    it('播放按钮点击不抛错', () => {
      mountComponent()
      const btn = win.body.querySelector('.qt-btn') as HTMLElement
      expect(() => btn.dispatchEvent(new MouseEvent('click', { bubbles: true }))).not.toThrow()
    })

    it('进度条拖拽', () => {
      mountComponent()
      const seek = win.body.querySelector('.qt-seek') as HTMLInputElement
      seek.value = '50'
      seek.dispatchEvent(new Event('input', { bubbles: true }))
      expect(seek.value).toBe('50')
    })

    it('音量拖拽不抛错', () => {
      mountComponent()
      const vol = win.body.querySelector('.qt-vol') as HTMLInputElement
      vol.value = '30'
      // window.Sys 已 mock，onVol 不应报错
      expect(() => vol.dispatchEvent(new Event('input', { bubbles: true }))).not.toThrow()
      expect(vol.value).toBe('30')
    })
  })

  // ==================== appState ====================
  describe('appState', () => {
    it('暴露 toggle/nav', () => {
      mountComponent()
      const appState = getAppState()
      expect(typeof appState.toggle).toBe('function')
      expect(typeof appState.nav).toBe('function')
    })
  })

  // ==================== 卸载 ====================
  describe('卸载', () => {
    it('卸载后 DOM 清理干净', () => {
      const wrapper = mountComponent()
      wrapper.unmount()
      expect(win.body.children).toHaveLength(0)
    })
  })
})