import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest'
import { mount } from '@vue/test-utils'
import { createRouter, createMemoryHistory } from 'vue-router'
import { createPinia, setActivePinia } from 'pinia'
import CourseLabelManagement from '@/views/groupcourse/CourseLabelManagement.vue'

// ===== Mock Element Plus =====
vi.mock('element-plus', () => ({
  ElMessage: { success: vi.fn(), error: vi.fn(), warning: vi.fn() },
  ElMessageBox: { confirm: vi.fn() },
}))

// ===== Mock @element-plus/icons-vue =====
vi.mock('@element-plus/icons-vue', () => ({
  Search: { template: '<svg/>' },
}))

// ===== Mock groupCourse.api =====
vi.mock('@/api/groupCourse.api', () => ({
  courseLabelApi: {
    getPage: vi.fn().mockResolvedValue({
      content: [
        { id: 1, labelName: '热门', color: '#FF0000', description: '热门标签' },
        { id: 2, labelName: '新手', color: '#00FF00', description: '新手友好' },
      ],
      totalElements: 2,
    }),
    create: vi.fn().mockResolvedValue({}),
    update: vi.fn().mockResolvedValue({}),
    delete: vi.fn().mockResolvedValue({}),
  },
}))

describe('CourseLabelManagement Component', () => {
  let router: any
  let wrapper: any

  const defaultStubs = {
    'el-button': { template: '<button @click="$emit(\'click\')"><slot/></button>', props: ['type', 'size', 'link'] },
    'el-card': { template: '<div class="el-card"><slot/><slot name="header"/></div>' },
    'el-input': { template: '<input/>', props: ['modelValue'], emits: ['update:modelValue'] },
    'el-icon': { template: '<svg/>' },
    'el-table': { template: '<div class="el-table"><slot/></div>', props: ['data', 'loading'] },
    'el-table-column': true,
    'el-tag': { template: '<span class="el-tag"><slot/></span>', props: ['type', 'effect', 'size', 'color'] },
    'el-pagination': true,
    'el-dialog': { template: '<div v-if="modelValue" class="el-dialog"><slot/><slot name="footer"/></div>', props: ['modelValue', 'title', 'width'] },
    'el-form': { template: '<form><slot/></form>', props: ['model', 'rules', 'label-width', 'ref'] },
    'el-form-item': { template: '<div class="el-form-item"><slot/></div>', props: ['label', 'prop'] },
    'el-color-picker': true,
  }

  beforeEach(() => {
    const pinia = createPinia()
    setActivePinia(pinia)

    router = createRouter({
      history: createMemoryHistory(),
      routes: [{ path: '/', component: { template: '<div/>' } }],
    })

    vi.clearAllMocks()
  })

  afterEach(() => {
    if (wrapper) wrapper.unmount()
  })

  // ==================== 组件初始化 ====================

  it('应该渲染标签管理容器', async () => {
    wrapper = mount(CourseLabelManagement, {
      global: { plugins: [router], stubs: defaultStubs },
    })

    await wrapper.vm.$nextTick()
    expect(wrapper.find('.course-label-management').exists()).toBe(true)
  })

  it('应该渲染搜索区域', async () => {
    wrapper = mount(CourseLabelManagement, {
      global: { plugins: [router], stubs: defaultStubs },
    })

    await wrapper.vm.$nextTick()
    expect(wrapper.html()).toContain('搜索标签名称')
  })

  it('应该渲染新增标签按钮', async () => {
    wrapper = mount(CourseLabelManagement, {
      global: { plugins: [router], stubs: defaultStubs },
    })

    await wrapper.vm.$nextTick()
    expect(wrapper.html()).toContain('新增标签')
  })

  // ==================== 初始状态 ====================

  it('初始 loading 状态为 false', async () => {
    wrapper = mount(CourseLabelManagement, {
      global: { plugins: [router], stubs: defaultStubs },
    })

    await wrapper.vm.$nextTick()
    expect(wrapper.vm.loading).toBe(false)
  })

  it('初始搜索关键词为空', async () => {
    wrapper = mount(CourseLabelManagement, {
      global: { plugins: [router], stubs: defaultStubs },
    })

    await wrapper.vm.$nextTick()
    expect(wrapper.vm.searchKeyword).toBe('')
  })

  it('初始 modalVisible 为 false', async () => {
    wrapper = mount(CourseLabelManagement, {
      global: { plugins: [router], stubs: defaultStubs },
    })

    await wrapper.vm.$nextTick()
    expect(wrapper.vm.modalVisible).toBe(false)
  })

  it('初始 currentPage 为 1', async () => {
    wrapper = mount(CourseLabelManagement, {
      global: { plugins: [router], stubs: defaultStubs },
    })

    await wrapper.vm.$nextTick()
    expect(wrapper.vm.currentPage).toBe(1)
  })

  it('初始 pageSize 为 10', async () => {
    wrapper = mount(CourseLabelManagement, {
      global: { plugins: [router], stubs: defaultStubs },
    })

    await wrapper.vm.$nextTick()
    expect(wrapper.vm.pageSize).toBe(10)
  })

  // ==================== 方法存在性 ====================

  it('应该暴露 handleSearch 方法', async () => {
    wrapper = mount(CourseLabelManagement, {
      global: { plugins: [router], stubs: defaultStubs },
    })

    await wrapper.vm.$nextTick()
    expect(typeof wrapper.vm.handleSearch).toBe('function')
  })

  it('应该暴露 handleAdd 方法', async () => {
    wrapper = mount(CourseLabelManagement, {
      global: { plugins: [router], stubs: defaultStubs },
    })

    await wrapper.vm.$nextTick()
    expect(typeof wrapper.vm.handleAdd).toBe('function')
  })

  it('应该暴露 handleEdit 方法', async () => {
    wrapper = mount(CourseLabelManagement, {
      global: { plugins: [router], stubs: defaultStubs },
    })

    await wrapper.vm.$nextTick()
    expect(typeof wrapper.vm.handleEdit).toBe('function')
  })

  it('应该暴露 handleDelete 方法', async () => {
    wrapper = mount(CourseLabelManagement, {
      global: { plugins: [router], stubs: defaultStubs },
    })

    await wrapper.vm.$nextTick()
    expect(typeof wrapper.vm.handleDelete).toBe('function')
  })

  // ==================== 新增弹窗 ====================

  it('handleAdd 应打开新增弹窗并重置表单', async () => {
    wrapper = mount(CourseLabelManagement, {
      global: { plugins: [router], stubs: defaultStubs },
    })

    await wrapper.vm.$nextTick()
    wrapper.vm.handleAdd()
    await wrapper.vm.$nextTick()

    expect(wrapper.vm.modalVisible).toBe(true)
    expect(wrapper.vm.modalTitle).toBe('新增标签')
    expect(wrapper.vm.formState.labelName).toBe('')
  })

  // ==================== 表单规则 ====================

  it('应定义 labelName 必填规则', async () => {
    wrapper = mount(CourseLabelManagement, {
      global: { plugins: [router], stubs: defaultStubs },
    })

    await wrapper.vm.$nextTick()
    expect(wrapper.vm.formRules.labelName).toBeDefined()
    expect(wrapper.vm.formRules.labelName[0].required).toBe(true)
  })

  it('应定义 color 必填规则', async () => {
    wrapper = mount(CourseLabelManagement, {
      global: { plugins: [router], stubs: defaultStubs },
    })

    await wrapper.vm.$nextTick()
    expect(wrapper.vm.formRules.color).toBeDefined()
  })

  // ==================== 分页操作 ====================

  it('onSizeChange 应重置当前页为 1', async () => {
    wrapper = mount(CourseLabelManagement, {
      global: { plugins: [router], stubs: defaultStubs },
    })

    await wrapper.vm.$nextTick()
    wrapper.vm.currentPage = 3
    wrapper.vm.onSizeChange()
    await wrapper.vm.$nextTick()

    expect(wrapper.vm.currentPage).toBe(1)
  })

  it('handleSearch 应重置当前页为 1', async () => {
    wrapper = mount(CourseLabelManagement, {
      global: { plugins: [router], stubs: defaultStubs },
    })

    await wrapper.vm.$nextTick()
    wrapper.vm.currentPage = 3
    wrapper.vm.handleSearch()
    await wrapper.vm.$nextTick()

    expect(wrapper.vm.currentPage).toBe(1)
  })
})