import { computed, ref } from 'vue'

export function createReceiptDetailDashboardModel({
  detailForm,
  editableOtherFields,
  formatDateTime,
  formatScore,
  selectedReceipt
}) {
  const previewZoom = ref(1)
  const previewRotation = ref(0)
  const previewTransform = computed(() => `scale(${previewZoom.value}) rotate(${previewRotation.value}deg)`)
  const previewPageLabel = computed(() => {
    const pageCount = Number(selectedReceipt.value?.page_count || 1)
    return `1 / ${Number.isFinite(pageCount) && pageCount > 0 ? pageCount : 1}`
  })
  const ocrPreviewFields = computed(() => (
    editableOtherFields.value
      .filter((field) => String(field?.label || field?.key || field?.value || '').trim())
      .slice(0, 6)
  ))
  const basicInfoItems = computed(() => [
    { label: '票据类型', value: fallback(detailForm.document_type_label) },
    { label: '票据名称', value: fallback(detailForm.file_name) },
    { label: '提交人', value: fallback(selectedReceipt.value?.owner_name || selectedReceipt.value?.owner || '当前用户') },
    { label: '上传时间', value: formatDateTime(selectedReceipt.value?.uploaded_at) },
    { label: '所属单据编号', value: fallback(selectedReceipt.value?.linked_claim_no, '未关联') },
    { label: 'OCR 置信度', value: formatScore(selectedReceipt.value?.avg_score) }
  ])
  const receiptStatusItems = computed(() => {
    const linked = selectedReceipt.value?.status === 'linked'
    return [
      { label: '识别状态', value: '识别成功', tone: 'success' },
      { label: '关联状态', value: selectedReceipt.value?.status_label || (linked ? '已关联' : '未关联'), tone: linked ? 'success' : 'warning' },
      { label: '重复报销风险', value: '无风险', tone: 'success' },
      { label: '归档状态', value: linked ? '待归档' : '未归档', tone: 'info' }
    ]
  })
  const linkedClaimItems = computed(() => [
    { label: '报销单编号', value: fallback(selectedReceipt.value?.linked_claim_no, '未关联') },
    { label: '报销单名称', value: linkedClaimName.value },
    { label: '费用类型', value: fallback(detailForm.scene_label) },
    { label: '申请日期', value: dateOnly(selectedReceipt.value?.linked_at || selectedReceipt.value?.uploaded_at) },
    { label: '审批状态', value: selectedReceipt.value?.status === 'linked' ? '已关联' : '待关联' },
    { label: '是否已入账', value: '未入账' }
  ])
  const operationLogs = computed(() => [
    {
      time: formatDateTime(selectedReceipt.value?.uploaded_at),
      operator: fallback(selectedReceipt.value?.owner_name || selectedReceipt.value?.owner || '系统'),
      label: '上传票据'
    },
    {
      time: formatDateTime(selectedReceipt.value?.uploaded_at),
      operator: '系统',
      label: `OCR识别，提取 ${editableOtherFields.value.length} 项要素`
    },
    {
      time: formatDateTime(selectedReceipt.value?.linked_at || selectedReceipt.value?.uploaded_at),
      operator: selectedReceipt.value?.status === 'linked' ? '系统' : '待处理',
      label: selectedReceipt.value?.status === 'linked' ? `关联单据 ${selectedReceipt.value?.linked_claim_no || ''}` : '等待关联单据'
    }
  ])
  const archiveInfoItems = computed(() => [
    { label: '归档编号', value: archiveNo.value },
    { label: '归档目录', value: `${dateOnly(selectedReceipt.value?.uploaded_at)} / ${fallback(detailForm.scene_label)}` },
    { label: '保管期限', value: '10年' },
    { label: '关联附件数量', value: selectedReceipt.value?.status === 'linked' ? '1' : '0' },
    { label: '文件格式', value: fileFormat.value },
    { label: '文件大小', value: fallback(selectedReceipt.value?.file_size_label || selectedReceipt.value?.size_label, '待统计') }
  ])
  const linkedClaimName = computed(() => (
    selectedReceipt.value?.linked_claim_no
      ? `${fallback(detailForm.scene_label)}票据归集`
      : '暂未关联报销单'
  ))
  const archiveNo = computed(() => (
    selectedReceipt.value?.id ? `DA-${String(selectedReceipt.value.id).slice(0, 8).toUpperCase()}` : '待生成'
  ))
  const fileFormat = computed(() => {
    const fileName = String(detailForm.file_name || selectedReceipt.value?.file_name || '').trim()
    const suffix = fileName.includes('.') ? fileName.split('.').pop() : ''
    return suffix ? suffix.toUpperCase() : fallback(selectedReceipt.value?.preview_kind, '待识别')
  })

  function adjustPreviewZoom(delta) {
    previewZoom.value = Math.min(1.8, Math.max(0.6, Number((previewZoom.value + delta).toFixed(2))))
  }

  function resetPreviewView() {
    previewZoom.value = 1
    previewRotation.value = 0
  }

  function rotatePreview() {
    previewRotation.value = (previewRotation.value + 90) % 360
  }

  return {
    adjustPreviewZoom,
    archiveInfoItems,
    basicInfoItems,
    linkedClaimItems,
    ocrPreviewFields,
    operationLogs,
    previewPageLabel,
    previewRotation,
    previewTransform,
    previewZoom,
    receiptStatusItems,
    resetPreviewView,
    rotatePreview
  }
}

function fallback(value, empty = '待补充') {
  const text = String(value || '').trim()
  return text || empty
}

function dateOnly(value) {
  const text = String(value || '').trim()
  return text ? text.slice(0, 10) : '待确认'
}