import { mount } from '@vue/test-utils'
import ElementPlus from 'element-plus'
import { nextTick } from 'vue'
import { describe, expect, test, vi } from 'vitest'
import MaterialImportResult from './MaterialImportResult.vue'

const failedResult = {
  total_rows: 3,
  success_rows: 0,
  failed_rows: 2,
  errors: [
    { row: 2, data: { name: '', spec: 'M8x30', unit: '个', major: '机械结构类', minor: '标准件' }, reason: '物料名称不能为空' },
    { row: 4, data: { name: '螺栓', spec: '', unit: '吨', major: '机械结构类', minor: '标准件' }, reason: '单位「吨」不存在或已停用' }
  ]
}

// el-table 分两轮渲染：先注册列，下一轮才把单元格填上。只等一个 tick 的话
// 拿到的是空 <tr>，断言文本会莫名其妙地失败（实测过一次），所以统一等两轮。
async function mountResult(result, options = {}) {
  const wrapper = mount(MaterialImportResult, {
    props: { result },
    global: { plugins: [ElementPlus], stubs: { teleport: true }, ...options }
  })
  await nextTick()
  await nextTick()
  return wrapper
}

describe('MaterialImportResult', () => {
  test('失败时展示行数摘要与每行错误', async () => {
    const wrapper = await mountResult(failedResult)

    expect(wrapper.text()).toContain('共 3 行')
    expect(wrapper.text()).toContain('2 行未通过')
    const rows = wrapper.findAll('tbody tr')
    expect(rows.length).toBe(2)
    expect(rows[0].text()).toContain('2')
    expect(rows[0].text()).toContain('物料名称不能为空')
    wrapper.unmount()
  })

  test('导出错误明细时把行号与原因写进 CSV', async () => {
    const download = vi.fn()
    const wrapper = await mountResult(failedResult, { provide: { downloadCsv: download } })

    await wrapper.find('[data-test="export-errors"]').trigger('click')

    expect(download).toHaveBeenCalledTimes(1)
    const [fileName, csv] = download.mock.calls[0]
    expect(fileName).toContain('导入错误明细')
    expect(csv).toContain('物料名称不能为空')
    expect(csv).toContain('行号')
    wrapper.unmount()
  })

  test('全部成功时只展示成功摘要，不显示错误表格', async () => {
    const wrapper = await mountResult({ total_rows: 2, success_rows: 2, failed_rows: 0, errors: [] })

    expect(wrapper.text()).toContain('成功导入 2 条')
    expect(wrapper.find('[data-test="error-table"]').exists()).toBe(false)
    wrapper.unmount()
  })
})