/**
 * 回归用例：页面 keep-alive 缓存（曾因包装组件读「当前路由」导致缓存全灭）。
 * 用轻量桩组件替换三个页面（统计挂载/激活/卸载、持有自身状态），其余
 * （布局、页签、store、路由）全部真实，覆盖：
 * 1. 切走再切回：不重新挂载、状态保留（keep-alive 生效）
 * 2. 缓存页的内部状态在其它路由切换后仍保留（包装组件不得依赖当前路由）
 * 3. 双击页签刷新：页面组件重新挂载、状态归零（缓存槽位不变）
 */
import { describe, it, expect, beforeEach, vi } from 'vitest'
import { flushPromises, mount } from '@vue/test-utils'
import { onActivated, onDeactivated, onUnmounted, ref } from 'vue'

// —— 桩组件共享的计数器（vi.hoisted 保证 mock 工厂可用）——
const counters = vi.hoisted(() => ({
  ModuleManagement: { mounts: 0, activated: 0, deactivated: 0, unmounted: 0 },
  MenuManagement: { mounts: 0, activated: 0, deactivated: 0, unmounted: 0 },
  Dashboard: { mounts: 0, activated: 0, deactivated: 0, unmounted: 0 },
}))

function makeStub(label) {
  return {
    name: label,
    template: `<div data-page="${label}">{{ label }}#{{ clicks }}<button data-inc @click="clicks++">+</button></div>`,
    setup() {
      const c = counters[label]
      // 页面自身状态：模拟树选中、面板展开等 —— 切走再切回应保留
      const clicks = ref(0)
      c.mounts++
      onActivated(() => c.activated++)
      onDeactivated(() => c.deactivated++)
      onUnmounted(() => c.unmounted++)
      return { clicks }
    },
  }
}

vi.mock('@/views/dashboard/index.vue', () => ({ default: makeStub('Dashboard') }))
vi.mock('@/views/module/module-management/index.vue', () => ({
  default: makeStub('ModuleManagement'),
}))
vi.mock('@/views/module/menu-management/index.vue', () => ({
  default: makeStub('MenuManagement'),
}))
vi.mock('@/views/detail/DetailPage.vue', () => ({
  // 详情页桩：显示自身 id prop，验证包装组件从自身 fullPath（而非当前路由）取参
  default: {
    name: 'DetailPageStub',
    props: ['id'],
    template: '<div data-page="Detail">{{ id }}</div>',
  },
}))

vi.mock('@/services/api', () => ({
  loadDataApi: vi.fn(() => Promise.resolve({ data: [], code: 0, success: true })),
  describeApi: vi.fn(() => Promise.resolve({ data: [], code: 0, success: true })),
  saveObjectApi: vi.fn(() => Promise.resolve({ code: 0, success: true })),
  nextIdApi: vi.fn(() => Promise.resolve({ data: 1, code: 0, success: true })),
}))

import App from '@/App.vue'
import router from '@/router'
import { createTestPinia } from '../helpers/app.js'
import { useAuthStore } from '@/stores/auth'
import { useAppStore } from '@/stores/app'

beforeEach(async () => {
  localStorage.clear()
  sessionStorage.clear()
  Object.values(counters).forEach((c) => {
    c.mounts = 0
    c.activated = 0
    c.deactivated = 0
    c.unmounted = 0
  })
  createTestPinia()
  // 模块中心 /module/* 在路由层仅 g3soft 放行，缓存测试用管理员账号避免被守卫拦截
  useAuthStore().setSession({ token: 't', user: { id: 1, account: 'g3soft', name: 'U' } }, 'ORG')
  await router.push('/dashboard')
  await router.isReady()
})

async function mountApp() {
  const wrapper = mount(App, { global: { plugins: [router] }, attachTo: document.body })
  await flushPromises()
  return wrapper
}

describe('页面 keep-alive 缓存', () => {
  it('模块管理 ↔ 菜单管理 ↔ 工作台 来回切换：不重新挂载、状态保留', async () => {
    const wrapper = await mountApp()
    expect(counters.Dashboard.mounts).toBe(1)

    // 进入模块管理，点两下按钮制造页面状态
    await router.push('/module/module-management')
    await flushPromises()
    expect(counters.ModuleManagement.mounts).toBe(1)
    const inc = () => wrapper.find('[data-page="ModuleManagement"] [data-inc]').trigger('click')
    await inc()
    await inc()
    expect(wrapper.find('[data-page="ModuleManagement"]').text()).toContain('#2')

    // 切到菜单管理再切回：不重新挂载，clicks 仍为 2
    await router.push('/module/menu-management')
    await flushPromises()
    expect(counters.ModuleManagement.unmounted).toBe(0)
    expect(counters.ModuleManagement.deactivated).toBe(1)

    await router.push('/module/module-management')
    await flushPromises()
    expect(counters.ModuleManagement.mounts).toBe(1)
    expect(counters.ModuleManagement.unmounted).toBe(0)
    expect(wrapper.find('[data-page="ModuleManagement"]').text()).toContain('#2')

    // 再绕经工作台切回：缓存依旧（包装组件不得依赖当前路由）
    await router.push('/dashboard')
    await flushPromises()
    await router.push('/module/menu-management')
    await flushPromises()
    await router.push('/module/module-management')
    await flushPromises()
    expect(counters.ModuleManagement.mounts).toBe(1)
    expect(wrapper.find('[data-page="ModuleManagement"]').text()).toContain('#2')

    // 关闭页签后缓存销毁：重新进入应重新挂载
    const appStore = useAppStore()
    appStore.removeVisitedTab('/module/module-management')
    await router.push('/dashboard')
    await flushPromises()
    await router.push('/module/module-management')
    await flushPromises()
    expect(counters.ModuleManagement.mounts).toBe(2)
    expect(wrapper.find('[data-page="ModuleManagement"]').text()).toContain('#0')

    wrapper.unmount()
  })

  it('详情页：按参数独立缓存，切走再切回 id 不串、互不影响', async () => {
    const wrapper = await mountApp()

    await router.push('/detail/1')
    await flushPromises()
    expect(wrapper.find('[data-page="Detail"]').text()).toBe('1')

    // /detail/2 与 /detail/1 是两个独立缓存实例
    await router.push('/detail/2')
    await flushPromises()
    expect(wrapper.find('[data-page="Detail"]').text()).toBe('2')

    await router.push('/detail/1')
    await flushPromises()
    expect(wrapper.find('[data-page="Detail"]').text()).toBe('1')

    // 携带 query 时 id 仍正确（query 变化会产生独立缓存槽，但 id 不能被 query 污染）
    await router.push('/detail/1?tab=2')
    await flushPromises()
    expect(wrapper.find('[data-page="Detail"]').text()).toBe('1')

    wrapper.unmount()
  })

  it('双击页签刷新：页面组件重新挂载、状态归零（缓存槽位不变）', async () => {
    const wrapper = await mountApp()

    await router.push('/module/module-management')
    await flushPromises()
    await wrapper.find('[data-page="ModuleManagement"] [data-inc]').trigger('click')
    expect(wrapper.find('[data-page="ModuleManagement"]').text()).toContain('#1')

    const appStore = useAppStore()
    appStore.refreshRoute('/module/module-management')
    await flushPromises()

    expect(counters.ModuleManagement.mounts).toBe(2)
    expect(counters.ModuleManagement.unmounted).toBe(1)
    expect(wrapper.find('[data-page="ModuleManagement"]').text()).toContain('#0')

    wrapper.unmount()
  })
})