import { readFileSync } from 'node:fs'
import { resolve } from 'node:path'
import ElementPlus from 'element-plus'
import { enableAutoUnmount, flushPromises, mount } from '@vue/test-utils'
import { createMemoryHistory, createRouter } from 'vue-router'
import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
import { listPlatformTenants } from '@/modules/iam'
import { getReceivableStatistics } from '../api/finance'
import type { ReceivableStatisticsResult } from '../types'
import FinanceReceivableStatisticsView from './FinanceReceivableStatisticsView.vue'

const can = vi.hoisted(() => vi.fn((_permission: string) => true))
vi.mock('@/core/access/accessPreview', () => ({ useAccessPreviewStore: () => ({ can }) }))
vi.mock('@/modules/iam', () => ({ listPlatformTenants: vi.fn() }))
vi.mock('@/modules/downloads', () => ({ createPlatformExportTask: vi.fn() }))
vi.mock('@/shared/components/exportTaskCreatedDialog', () => ({ showExportTaskCreatedDialog: vi.fn() }))
vi.mock('../api/finance', () => ({ getReceivableStatistics: vi.fn() }))

const page = readFileSync(resolve(process.cwd(), 'src/modules/finance/pages/FinanceReceivableStatisticsView.vue'), 'utf8')
const statistics: ReceivableStatisticsResult = {
  statisticsMonth: '2026-10', currency: 'CNY', totalReceivable: '2600', totalReceived: '2550', totalOutstanding: '50',
  totalCustomers: 2, page: 1, pageSize: 20,
  records: [
    { customerId: '10001', customerName: '客户A', currency: 'CNY', totalReceivable: '2400', totalReceived: '2400', totalOutstanding: '0' },
    { customerId: '10002', customerName: '客户 10002', currency: 'CNY', totalReceivable: '200', totalReceived: '150', totalOutstanding: '50' },
  ],
}

async function mountPage() {
  const router = createRouter({ history: createMemoryHistory(), routes: [
    { path: '/finance/receivable-statistics', name: 'finance-receivable-statistics', component: FinanceReceivableStatisticsView },
    { path: '/other', name: 'other-page', component: { template: '<div>其他页面</div>' } },
  ] })
  await router.push('/finance/receivable-statistics')
  await router.isReady()
  const wrapper = mount(FinanceReceivableStatisticsView, { attachTo: document.body, global: { plugins: [ElementPlus, router] } })
  await flushPromises()
  return { wrapper, router }
}

enableAutoUnmount(afterEach)
beforeEach(() => {
  can.mockReturnValue(true)
  vi.stubGlobal('ResizeObserver', class { observe() {} unobserve() {} disconnect() {} })
  vi.mocked(listPlatformTenants).mockResolvedValue({ records: [{ id: '10002', tenantName: '客户B', status: 'ACTIVE' } as never], page: 1, size: 200, total: 1, pages: 1 })
  vi.mocked(getReceivableStatistics).mockResolvedValue(statistics)
})
afterEach(() => { vi.restoreAllMocks(); vi.unstubAllGlobals(); document.body.innerHTML = '' })

describe('receivable statistics page', () => {
  it('renders only the approved CNY derived metrics and current-filter actions', () => {
    for (const label of ['统计月份', '应收单位', '应收总额', '已收合计', '余额未收', '打印', '导出Excel']) expect(page).toContain(label)
    expect(page).toContain("exportType: 'FINANCE_RECEIVABLE_STATISTICS'")
    expect(page).toContain('window.print()')
    expect(page).toContain('aria-label="统计月份"')
    expect(page).toContain('aria-label="应收单位"')
    for (const removed of ['<span>统计月份</span>', '<span>应收单位</span>', '#before-results', '应收款明细', '仅统计CNY正式应收结算单']) expect(page).not.toContain(removed)
    expect(page).toContain('displayCustomerName(row)')
    expect(page).toContain('/^客户\\s*\\d+$/.test(snapshot)')
    expect(page).toContain("return masterName || '—'")
    for (const excluded of ['FBA直发', 'FBA专线', '零头减免', 'USD', '>编辑<']) expect(page).not.toContain(excluded)
  })

  it('keeps query reset, loading, empty, error and permission states explicit', () => {
    expect(page).toContain('function reset()')
    expect(page).toContain('无权访问应收款统计表')
    expect(page).toContain('<LoadErrorState')
    expect(page).toContain('当前月份暂无应收数据')
    expect(page).toContain(':loading="loading"')
  })

  it('prints an isolated report with all five columns, the loaded month and server totals', async () => {
    const print = vi.spyOn(window, 'print').mockImplementation(() => {})
    const { wrapper } = await mountPage()
    const report = document.body.querySelector(':scope > .receivable-statistics-print')!
    expect(report).not.toBeNull()
    expect(report.querySelector('h1')?.textContent).toBe('应收款统计表')
    expect(report.textContent).toContain('统计月份：2026-10')
    expect([...report.querySelectorAll('thead th')].map(cell => cell.textContent)).toEqual(['应收单位', '币种', '应收总额(CNY)', '已收合计(CNY)', '余额未收(CNY)'])
    expect([...report.querySelectorAll('tbody tr')].map(row => [...row.querySelectorAll('td')].map(cell => cell.textContent))).toEqual([
      ['客户A', 'CNY', '2,400.00', '2,400.00', '0.00'],
      ['客户B', 'CNY', '200.00', '150.00', '50.00'],
    ])
    expect([...report.querySelectorAll('tfoot td')].map(cell => cell.textContent)).toEqual(['2,600.00', '2,550.00', '50.00'])
    expect(report.querySelector('button, input, .finance-metric-grid, .data-table__pagination')).toBeNull()
    expect(page).toContain(':global(body:has(> .receivable-statistics-print) > :not(.receivable-statistics-print)) { display: none !important; }')
    expect(page).toContain('width: 100%; border-collapse: collapse; table-layout: fixed;')
    await wrapper.findAll('button').find(button => button.text() === '打印')!.trigger('click')
    expect(print).toHaveBeenCalledOnce()
  })

  it('removes the print report when a cached statistics page is no longer the active route', async () => {
    const { router } = await mountPage()
    expect(document.querySelector('.receivable-statistics-print')).not.toBeNull()
    await router.push('/other')
    await flushPromises()
    expect(document.querySelector('.receivable-statistics-print')).toBeNull()
    await router.push('/finance/receivable-statistics')
    await flushPromises()
    expect(document.querySelector('.receivable-statistics-print')).not.toBeNull()
  })

  it.each(['loading', 'error', 'no-permission'])('does not print unavailable statistics: %s', async state => {
    if (state === 'loading') vi.mocked(getReceivableStatistics).mockReturnValueOnce(new Promise(() => {}))
    if (state === 'error') vi.mocked(getReceivableStatistics).mockRejectedValueOnce(new Error('不可用'))
    if (state === 'no-permission') can.mockReturnValue(false)
    const print = vi.spyOn(window, 'print').mockImplementation(() => {})
    const { wrapper } = await mountPage()
    const vm = wrapper.vm as unknown as { printCurrent(): void }
    expect(document.querySelector('.receivable-statistics-print')).toBeNull()
    vm.printCurrent()
    expect(print).not.toHaveBeenCalled()
  })
})