/**
 * 回归用例：菜单管理 - 新建节点（未保存）→ 切到旧节点 → 切回新节点。
 * 曾因 loadMenuConfig 用临时 id 查库返回空 → maindata 为 null →
 * 模板以 null menu 渲染 → render 抛错 → 在布局 <Transition> 下崩溃
 * （表现为 "Component inside <Transition> renders non-element root node" +
 *  "Cannot set properties of null (setting '__vnode')"）。
 * 修复：watch(menuSelectedId) 对未落库节点不走 loadMenuConfig，从树节点重建草稿。
 *
 * 临时 id 现由 createTempId() 生成本地负数（不再取号），断言按实际值 -1 校验。
 */
import { describe, it, expect, beforeEach, vi } from 'vitest'
import { flushPromises } from '@vue/test-utils'
import MenuManagement from '@/views/module/menu-management/index.vue'
import { mountPage } from '../helpers/app.js'

vi.mock('@/services/api', () => ({
  loadDataApi: vi.fn(),
  saveObjectApi: vi.fn(() => Promise.resolve({ code: 0, success: true })),
  nextIdApi: vi.fn(() => Promise.resolve({ data: 9001, code: 0, success: true })),
  describeApi: vi.fn(() => Promise.resolve({ data: [], code: 0, success: true })),
}))

vi.mock('@/components/ui/message/message-manager.js', () => {
  const m = { success: vi.fn(), error: vi.fn(), warning: vi.fn(), info: vi.fn() }
  return { Message: m, default: m }
})

import { loadDataApi } from '@/services/api'

const savedMenu = {
  b_id: '1',
  b_code: 'home',
  b_parent_id: null,
  b_depth: 0,
  b_path: '/1/',
  b_name: '首页',
  b_menu_type: 'page',
  b_route: '/dashboard',
  b_xh: 10,
  b_canuse: 1,
}

beforeEach(() => {
  loadDataApi.mockReset()
  loadDataApi.mockImplementation((view, where) => {
    if (view === 's_menu' && where === '1 = 1') return Promise.resolve({ data: [savedMenu] })
    // 加载单行用 sqlText 拼的 N'1' 字面量
    if (view === 's_menu' && where === "b_id = N'1'")
      return Promise.resolve({ data: [savedMenu] })
    if (view === 's_menu') return Promise.resolve({ data: [] }) // 含本地临时 id（负数）：查无此行
    return Promise.resolve({ data: [] })
  })
})

describe('菜单管理：未保存新节点来回切换', () => {
  it('切回未保存的新节点时，从树节点重建草稿，不查库、渲染不报错', async () => {
    const { wrapper } = await mountPage(MenuManagement)
    await flushPromises()

    // 1. 新建节点（未保存）
    await wrapper.vm.addMenu(null, 'page')
    await flushPromises()
    expect(String(wrapper.vm.menuSelectedId)).toBe('-1')
    expect(wrapper.vm.maindata?.b_menu_type).toBe('page')

    // 2. 切到旧节点（已保存）
    wrapper.vm.menuSelectedId = '1'
    await flushPromises()
    expect(wrapper.vm.maindata?.b_id).toBe('1')

    // 3. 切回新节点：不应对临时 id 发起查库请求
    loadDataApi.mockClear()
    wrapper.vm.menuSelectedId = '-1'
    await flushPromises()
    await flushPromises()

    expect(loadDataApi).not.toHaveBeenCalled()
    expect(wrapper.vm.maindata).not.toBeNull()
    expect(String(wrapper.vm.maindata?.b_id)).toBe('-1')
    expect(wrapper.vm.maindata?.b_menu_type).toBe('page')
    expect(String(wrapper.vm.loadedMenuId)).toBe('-1')
  })
})