/**
 * 40-bear — 熊掌记 深层测试
 *
 * 使用 vitest 原汁原味的 vi.mock() 模式 mock 依赖模块（FS/WM）。
 * 使用 @vue/test-utils mount() 渲染组件。
 */
import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest'
import { mount } from '@vue/test-utils'
import { nextTick } from 'vue'
import BearComponent from '../../src/apps/bear/Bear.vue'
import { setupDOM, createMockWin } from '../helpers'

// ---- vi.mock() 模拟依赖（使用 vi.hoisted 解决 hoisting 问题）----
const { mockWrite, mockSetTitle } = vi.hoisted(() => ({
  mockWrite: vi.fn(),
  mockSetTitle: vi.fn(),
}))

vi.mock('../../src/composables/useFS', () => ({
  fs: {
    HOME: '/Users/guest',
    exists: vi.fn(() => false),
    read: vi.fn(() => ''),
    write: mockWrite,
    baseName: (p: string) => p.split('/').pop() || '',
  },
}))

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

describe('40-bear — 熊掌记', () => {
  let win: ReturnType<typeof createMockWin>

  beforeEach(() => {
    vi.clearAllMocks()
    setupDOM()
    win = createMockWin({ id: 'bear', appId: 'bear' })
  })

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

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

  function findTextarea() {
    return win.body.querySelector('textarea') as HTMLTextAreaElement
  }

  // ==================== DOM 结构 ====================
  describe('DOM 结构', () => {
    it('textarea 存在', () => {
      mountComponent()
      expect(findTextarea()).toBeTruthy()
    })

    it('占位符包含 Markdown', () => {
      mountComponent()
      expect(findTextarea().placeholder).toContain('Markdown')
    })

    it('标签栏存在', () => {
      mountComponent()
      expect(win.body.querySelector('.bear-tagbar')).toBeTruthy()
    })
  })

  // ==================== 标签 ====================
  describe('标签', () => {
    it('包含 #灵感 和 #工作', () => {
      mountComponent()
      const tags = [...win.body.querySelectorAll('.bear-tag')].map(t => t.textContent)
      expect(tags).toContain('#灵感')
      expect(tags).toContain('#工作')
    })

    it('标签个数为 2', () => {
      mountComponent()
      expect(win.body.querySelectorAll('.bear-tag')).toHaveLength(2)
    })
  })

  // ==================== 编辑 ====================
  describe('编辑', () => {
    it('输入触发 onInput', async () => {
      mountComponent()
      const ta = findTextarea()
      ta.value = 'hello'
      ta.dispatchEvent(new Event('input', { bubbles: true }))
      await nextTick()
      expect(mockSetTitle).toHaveBeenCalled()
    })

    it('中文输入正常', async () => {
      mountComponent()
      const ta = findTextarea()
      ta.value = '你好世界'
      ta.dispatchEvent(new Event('input', { bubbles: true }))
      await nextTick()
      expect(ta.value).toBe('你好世界')
    })

    it('空输入不崩溃', async () => {
      mountComponent()
      const ta = findTextarea()
      ta.value = ''
      ta.dispatchEvent(new Event('input', { bubbles: true }))
      await nextTick()
      expect(ta.value).toBe('')
    })
  })

  // ==================== 保存 ====================
  describe('保存', () => {
    it('appState.save 存在', () => {
      mountComponent()
      expect(typeof win.appState.save).toBe('function')
    })

    it('save 调用 write', () => {
      mountComponent()
      const ta = findTextarea()
      ta.value = 'test content'
      win.appState.save()
      expect(mockWrite).toHaveBeenCalledWith(
        '/Users/guest/Documents/熊掌记.md',
        'test content',
        { mime: 'text/markdown' }
      )
    })

    it('空内容 save 不抛错', () => {
      mountComponent()
      findTextarea().value = ''
      expect(() => win.appState.save()).not.toThrow()
    })
  })

  // ==================== 快捷键 ====================
  describe('快捷键', () => {
    it('⌘S 触发保存', async () => {
      mountComponent()
      const ta = findTextarea()
      ta.value = 'cmd-s-test'
      ta.dispatchEvent(new Event('input', { bubbles: true }))

      win.el.dispatchEvent(new KeyboardEvent('keydown', {
        key: 's', metaKey: true, bubbles: true
      }))

      expect(mockWrite).toHaveBeenCalled()
    })

    it('普通 S 不触发保存', async () => {
      mountComponent()
      const before = mockWrite.mock.calls.length

      win.el.dispatchEvent(new KeyboardEvent('keydown', {
        key: 's', metaKey: false, bubbles: true
      }))

      expect(mockWrite).toHaveBeenCalledTimes(before)
    })
  })

  // ==================== 边界 ====================
  describe('边界', () => {
    it('极长文本不崩溃', () => {
      mountComponent()
      const ta = findTextarea()
      ta.value = 'a'.repeat(10000)
      ta.dispatchEvent(new Event('input', { bubbles: true }))
      expect(ta.value.length).toBe(10000)
    })

    it('特殊字符不崩溃', () => {
      mountComponent()
      const ta = findTextarea()
      ta.value = '<script>alert(1)</script>'
      ta.dispatchEvent(new Event('input', { bubbles: true }))
      expect(ta.value).toContain('script')
    })

    it('重复挂载不崩溃', () => {
      mountComponent()
      mountComponent()
      expect(findTextarea()).toBeTruthy()
    })
  })

  // ==================== 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)
    })
  })
})