// @vitest-environment happy-dom

import { defineComponent } from 'vue'
import { flushPromises, mount } from '@vue/test-utils'
import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
import ExplainGuideStopListPage from '@/pages/explain/guide-stop-list.vue'
import { explainUseCase } from '@/usecases/explainUseCase'

const testState = vi.hoisted(() => ({
  onLoadHandler: null as null | ((options?: Record<string, string>) => void)
}))

vi.mock('@dcloudio/uni-app', () => ({
  onLoad: (handler: (options?: Record<string, string>) => void) => {
    testState.onLoadHandler = handler
  }
}))

vi.mock('@/usecases/explainUseCase', () => ({
  explainUseCase: {
    listGuideStopsPageByHall: vi.fn().mockResolvedValue({
      items: [], total: 0, pageNo: 1, pageSize: 20, hasMore: false
    })
  }
}))

const GuidePageFrameStub = defineComponent({
  name: 'GuidePageFrame',
  emits: ['back'],
  template: '<main><button data-testid="frame-back" @click="$emit(\'back\')">返回</button><slot /></main>'
})

const ExplainGuideStopCatalogStub = defineComponent({
  name: 'ExplainGuideStopCatalog',
  props: ['guideStops', 'selectedHallName', 'loading', 'loadingMore', 'hasMore', 'error', 'loadMoreError'],
  emits: ['back', 'retry', 'retryMore', 'guideStopClick'],
  template: '<button data-testid="list-back" @click="$emit(\'back\')">返回</button><button data-testid="retry-more" @click="$emit(\'retryMore\')">重试更多</button>'
})

const mountGuideStopList = () => mount(ExplainGuideStopListPage, {
  global: {
    stubs: {
      GuidePageFrame: GuidePageFrameStub,
      ExplainGuideStopCatalog: ExplainGuideStopCatalogStub
    }
  }
})

beforeEach(() => {
  testState.onLoadHandler = null
  vi.stubGlobal('uni', {
    navigateBack: vi.fn(),
    reLaunch: vi.fn(),
    navigateTo: vi.fn(),
    setNavigationBarTitle: vi.fn()
  })
  vi.stubGlobal('getCurrentPages', vi.fn(() => []))
  vi.mocked(explainUseCase.listGuideStopsPageByHall).mockReset()
  vi.mocked(explainUseCase.listGuideStopsPageByHall).mockResolvedValue({ items: [], total: 0, pageNo: 1, pageSize: 20, hasMore: false })
})

afterEach(() => {
  vi.restoreAllMocks()
  vi.unstubAllGlobals()
})

describe('讲解对象列表返回', () => {
  it('ignores a delayed first-page response after unmount', async () => {
    let resolvePage: ((page: { items: Array<{ id: string, name: string }>, total: number, pageNo: number, pageSize: number, hasMore: boolean }) => void) | undefined
    vi.mocked(explainUseCase.listGuideStopsPageByHall).mockImplementationOnce(() => new Promise((resolve) => { resolvePage = resolve }))
    const wrapper = mountGuideStopList()
    testState.onLoadHandler?.({ hallId: 'hall-1' })
    wrapper.unmount()
    resolvePage?.({ items: [{ id: 'late', name: '延迟' }], total: 1, pageNo: 1, pageSize: 20, hasMore: false })
    await flushPromises()
    expect(explainUseCase.listGuideStopsPageByHall).toHaveBeenCalledTimes(1)
  })

  it('permits retry-more recovery after a failed page', async () => {
    vi.mocked(explainUseCase.listGuideStopsPageByHall)
      .mockResolvedValueOnce({ items: [{ id: 'one', name: '一号' }], total: 2, pageNo: 1, pageSize: 20, hasMore: true })
      .mockRejectedValueOnce(new Error('temporary'))
      .mockResolvedValueOnce({ items: [{ id: 'two', name: '二号' }], total: 2, pageNo: 2, pageSize: 20, hasMore: false })
    const wrapper = mountGuideStopList()
    testState.onLoadHandler?.({ hallId: 'hall-1' })
    await flushPromises()
    await wrapper.get('[data-testid="retry-more"]').trigger('click')
    await flushPromises()
    expect(explainUseCase.listGuideStopsPageByHall).toHaveBeenCalledTimes(2)
    await wrapper.get('[data-testid="retry-more"]').trigger('click')
    await flushPromises()
    expect(explainUseCase.listGuideStopsPageByHall).toHaveBeenCalledTimes(3)
    wrapper.unmount()
  })

  it('上一页是独立展厅列表时回到该列表', async () => {
    vi.stubGlobal('getCurrentPages', vi.fn(() => [
      { route: 'pages/explain/list', options: {} },
      { route: 'pages/explain/guide-stop-list', options: {} }
    ]))
    const wrapper = mountGuideStopList()
    testState.onLoadHandler?.({ hallId: 'hall-1', hallName: '恐龙厅' })
    await flushPromises()

    await wrapper.get('[data-testid="frame-back"]').trigger('click')

    expect(uni.navigateBack).toHaveBeenCalledWith(expect.objectContaining({ delta: 1 }))
    expect(uni.reLaunch).not.toHaveBeenCalled()
    wrapper.unmount()
  })

  it('上一页是首页讲解 Tab 时回到首页中的展厅列表', async () => {
    vi.stubGlobal('getCurrentPages', vi.fn(() => [
      { route: 'pages/index/index', options: { tab: 'explain' } },
      { route: 'pages/explain/guide-stop-list', options: {} }
    ]))
    const wrapper = mountGuideStopList()

    await wrapper.get('[data-testid="list-back"]').trigger('click')

    expect(uni.navigateBack).toHaveBeenCalledWith(expect.objectContaining({ delta: 1 }))
    expect(uni.reLaunch).not.toHaveBeenCalled()
    wrapper.unmount()
  })

  it('深链或不相关上一页直接回退至独立展厅列表', async () => {
    const wrapper = mountGuideStopList()

    await wrapper.get('[data-testid="list-back"]').trigger('click')

    expect(uni.navigateBack).not.toHaveBeenCalled()
    expect(uni.reLaunch).toHaveBeenCalledWith({ url: '/pages/explain/list' })
    wrapper.unmount()
  })

  it('页面栈返回失败时回退至独立展厅列表', async () => {
    vi.stubGlobal('getCurrentPages', vi.fn(() => [
      { route: 'pages/explain/list', options: {} },
      { route: 'pages/explain/guide-stop-list', options: {} }
    ]))
    vi.stubGlobal('uni', {
      navigateBack: vi.fn((options: { fail?: () => void }) => options.fail?.()),
      reLaunch: vi.fn(),
      navigateTo: vi.fn(),
      setNavigationBarTitle: vi.fn()
    })
    const wrapper = mountGuideStopList()

    await wrapper.get('[data-testid="list-back"]').trigger('click')

    expect(uni.reLaunch).toHaveBeenCalledWith({ url: '/pages/explain/list' })
    wrapper.unmount()
  })
})