import { ref } from 'vue'
import { ElMessage } from 'element-plus'
import { guardRequestWithMessage } from '@/utils/sys/requestGuard'

export function usePrintExportPage({
  downloadFileName,
  requestExport,
  resolvePrintRecords,
  buildPreviewRows,
  buildPreviewMeta,
  timeoutMs
}) {
  const previewVisible = ref(false)
  const previewRows = ref([])
  const previewMeta = ref({})
  const previewToken = ref(0)
  const activePrintToken = ref(0)

  const handlePreviewVisibleChange = (visible) => {
    previewVisible.value = Boolean(visible)
    if (!visible) {
      activePrintToken.value = 0
    }
  }

  const handleExport = async (payload) => {
    try {
      const response = await guardRequestWithMessage(requestExport(payload), null, {
        timeoutMs,
        timeoutMessage: '导出请求超时，已停止等待'
      })
      if (!response) {
        return
      }
      if (!response.ok) {
        throw new Error(`导出失败 (${response.status})`)
      }

      const blob = await response.blob()
      const downloadUrl = window.URL.createObjectURL(blob)
      const link = document.createElement('a')
      link.href = downloadUrl
      link.download = downloadFileName
      document.body.appendChild(link)
      link.click()
      link.remove()
      window.URL.revokeObjectURL(downloadUrl)
      ElMessage.success('导出成功')
    } catch (error) {
      ElMessage.error(error?.message || '导出失败')
    }
  }

  const handlePrint = async (payload) => {
    const token = previewToken.value + 1
    previewToken.value = token
    activePrintToken.value = token
    previewVisible.value = false
    previewRows.value = []
    previewMeta.value = {}

    try {
      const records = await guardRequestWithMessage(resolvePrintRecords(payload), null, {
        timeoutMs,
        timeoutMessage: '打印数据加载超时，已停止等待'
      })
      if (activePrintToken.value !== token) {
        return
      }
      if (!records) {
        return
      }

      const rows = buildPreviewRows(records)
      previewRows.value = rows
      previewMeta.value = buildPreviewMeta(rows)
      handlePreviewVisibleChange(true)
    } catch (error) {
      if (activePrintToken.value !== token) {
        return
      }
      ElMessage.error(error?.message || '打印失败')
    }
  }

  return {
    previewVisible,
    previewRows,
    previewMeta,
    handlePreviewVisibleChange,
    handleExport,
    handlePrint
  }
}