import { computed, onBeforeUnmount, reactive, ref, watch } from 'vue'

import { useSystemState } from '../../composables/useSystemState.js'
import { useToast } from '../../composables/useToast.js'
import ConfirmDialog from '../../components/shared/ConfirmDialog.vue'
import {
  createExpenseClaimItem,
  deleteExpenseClaimItem,
  deleteExpenseClaimItemAttachment,
  deleteExpenseClaim,
  fetchExpenseClaimItemAttachmentMeta,
  fetchExpenseClaimItemAttachmentPreview,
  returnExpenseClaim,
  submitExpenseClaim,
  uploadExpenseClaimItemAttachment,
  updateExpenseClaimItem
} from '../../services/reimbursements.js'
import { canManageExpenseClaims } from '../../utils/accessControl.js'
import { normalizeRequestForUi } from '../../utils/requestViewModel.js'

const EXPENSE_TYPE_OPTIONS = [
  { value: 'travel', label: '差旅费' },
  { value: 'entertainment', label: '业务招待费' },
  { value: 'office', label: '办公费' },
  { value: 'meeting', label: '会务费' },
  { value: 'training', label: '培训费' },
  { value: 'hotel', label: '住宿费' },
  { value: 'transport', label: '交通费' },
  { value: 'meal', label: '餐费' },
  { value: 'other', label: '其他费用' }
]

const DOCUMENT_TYPE_LABELS = {
  flight_itinerary: '机票/航班行程单',
  train_ticket: '火车/高铁票',
  hotel_invoice: '酒店住宿票据',
  taxi_receipt: '出租车/网约车票据',
  parking_toll_receipt: '停车/通行费票据',
  meal_receipt: '餐饮票据',
  office_invoice: '办公用品票据',
  meeting_invoice: '会议/会务票据',
  training_invoice: '培训票据',
  vat_invoice: '增值税发票',
  receipt: '一般收据/凭证',
  other: '其他单据'
}

const LOCATION_REQUIRED_EXPENSE_TYPES = new Set([
  'travel',
  'meeting',
  'entertainment'
])

function parseCurrency(value) {
  return Number.parseFloat(String(value).replace(/[^\d.]/g, '')) || 0
}

function formatCurrency(value) {
  return new Intl.NumberFormat('zh-CN', {
    style: 'currency',
    currency: 'CNY',
    minimumFractionDigits: 0,
    maximumFractionDigits: Number.isInteger(value) ? 0 : 2
  }).format(value)
}

function normalizeExpenseType(value) {
  return String(value || '').trim() || 'other'
}

function resolveExpenseTypeLabel(value) {
  return EXPENSE_TYPE_OPTIONS.find((option) => option.value === normalizeExpenseType(value))?.label || '其他费用'
}

function resolveDocumentTypeLabel(value) {
  return DOCUMENT_TYPE_LABELS[String(value || '').trim()] || DOCUMENT_TYPE_LABELS.other
}

function isLocationRequiredExpenseType(value) {
  return LOCATION_REQUIRED_EXPENSE_TYPES.has(normalizeExpenseType(value))
}

function resolveLocationInputPlaceholder(value) {
  return isLocationRequiredExpenseType(value) ? '输入业务地点' : '输入采购/收货地点（可选）'
}

function resolveLocationSummaryLabel(value) {
  return isLocationRequiredExpenseType(value) ? '业务地点' : '采购/收货地点'
}

function resolveLocationDisplay(value, expenseType) {
  if (!isLocationRequiredExpenseType(expenseType) && isPlaceholderValue(value)) {
    return '非必填'
  }

  return isPlaceholderValue(value) ? '待补充' : value
}

function buildFallbackProgressSteps() {
  return [
    { index: 1, label: '保存草稿', time: '已完成', done: true, active: true },
    { index: 2, label: '待提交', time: '进行中', active: true, current: true },
    { index: 3, label: 'AI预审', time: '待处理' },
    { index: 4, label: '直属领导审批', time: '待处理' },
    { index: 5, label: '财务审批', time: '待处理' },
    { index: 6, label: '归档入账', time: '待处理' }
  ]
}

function buildFallbackExpenseItems(request) {
  return [
    buildExpenseItemViewModel({
      id: 'fallback-1',
      itemDate: '',
      itemType: request.typeCode || 'other',
      itemReason: request.reason,
      itemLocation: request.sceneTarget,
      itemAmount: parseCurrency(request.amountDisplay),
      invoiceId: '',
      time: '待补充',
      dayLabel: request.detailVariant === 'travel' ? '出行日' : '业务发生日',
      name: request.typeLabel,
      category: request.typeLabel,
      desc: request.reason,
      detail: resolveLocationDisplay(request.sceneTarget, request.typeCode),
      amount: request.amountDisplay,
      status: '待补充',
      tone: 'bad',
      attachmentStatus: '待上传',
      attachmentHint: '请在此单据中继续补充附件',
      attachmentTone: 'missing',
      attachments: [],
      riskLabel: '待补材料',
      riskText: request.riskSummary,
      riskTone: 'medium'
    }, 0, request)
  ]
}

function isPlaceholderValue(value) {
  const text = String(value || '').trim()
  if (!text) {
    return true
  }

  return ['待补充', '暂无', '无', '未知', '处理中'].includes(text.replace(/\s+/g, ''))
}

function isValidIsoDate(value) {
  const normalized = String(value || '').trim()
  if (!/^\d{4}-\d{2}-\d{2}$/.test(normalized)) {
    return false
  }

  const [yearText, monthText, dayText] = normalized.split('-')
  const year = Number(yearText)
  const month = Number(monthText)
  const day = Number(dayText)

  if (!Number.isInteger(year) || !Number.isInteger(month) || !Number.isInteger(day)) {
    return false
  }

  const candidate = new Date(Date.UTC(year, month - 1, day))
  return (
    candidate.getUTCFullYear() === year &&
    candidate.getUTCMonth() === month - 1 &&
    candidate.getUTCDate() === day
  )
}

function normalizeIsoDateValue(value) {
  const normalized = String(value || '').trim()
  if (isValidIsoDate(normalized)) {
    return normalized
  }

  const match = normalized.match(/^(\d{4}-\d{2}-\d{2})/)
  if (match && isValidIsoDate(match[1])) {
    return match[1]
  }

  const candidate = value instanceof Date ? value : new Date(normalized)
  if (Number.isNaN(candidate.getTime())) {
    return ''
  }

  const year = candidate.getFullYear()
  const month = String(candidate.getMonth() + 1).padStart(2, '0')
  const day = String(candidate.getDate()).padStart(2, '0')
  return `${year}-${month}-${day}`
}

function resolveExpenseUploadHint(value) {
  const normalized = String(value || '').trim()
  return normalized || '支持上传 JPG、PNG、PDF，未上传也可先保存草稿'
}

function extractAttachmentDisplayName(value) {
  const normalized = String(value || '').trim()
  if (!normalized) {
    return ''
  }

  return normalized.split('/').filter(Boolean).pop() || normalized
}

function buildExpenseItemViewModel(source, index, requestModel) {
  const itemType = normalizeExpenseType(source?.itemType || source?.item_type || requestModel?.typeCode || 'other')
  const itemReason = String(source?.itemReason ?? source?.item_reason ?? '').trim()
  const itemLocation = String(source?.itemLocation ?? source?.item_location ?? '').trim()
  const itemDate = normalizeIsoDateValue(source?.itemDate ?? source?.item_date)
  const itemAmount = parseCurrency(source?.itemAmount ?? source?.item_amount)
  const invoiceId = String(source?.invoiceId ?? source?.invoice_id ?? '').trim()
  const attachmentName = String(source?.attachmentName || source?.attachment_name || extractAttachmentDisplayName(invoiceId)).trim()
  const attachments = invoiceId ? [attachmentName || invoiceId] : []
  const amountDisplay = itemAmount > 0 ? formatCurrency(itemAmount) : '待补充'
  const riskText = String(source?.riskText || '').trim()

  return {
    id: String(source?.id || `${requestModel?.claimId || requestModel?.id || 'claim'}-item-${index}`),
    itemDate,
    itemType,
    itemReason,
    itemLocation,
    itemAmount,
    invoiceId,
    time: itemDate || '待补充',
    dayLabel: requestModel?.detailVariant === 'travel' ? `第 ${index + 1} 项` : '业务发生项',
    name: resolveExpenseTypeLabel(itemType),
    category: resolveExpenseTypeLabel(itemType),
    desc: itemReason || '待补充',
    detail: resolveLocationDisplay(itemLocation, itemType),
    amount: amountDisplay,
    status: attachments.length ? '已识别' : '待补充',
    tone: attachments.length ? 'ok' : 'bad',
    attachmentStatus: attachments.length ? `${attachments.length} 份附件` : '未上传',
    attachmentHint: attachments.length ? attachmentName || attachments[0] : resolveExpenseUploadHint(),
    attachmentTone: attachments.length ? 'ok' : 'missing',
    attachments,
    riskLabel: String(source?.riskLabel || '').trim() || '无',
    riskText,
    riskTone: String(source?.riskTone || '').trim() || 'low'
  }
}

function rebuildExpenseItems(items, requestModel) {
  return items.map((item, index) => buildExpenseItemViewModel(item, index, requestModel))
}

function buildExpenseDraftIssues(item) {
  const issues = []
  const locationRequired = isLocationRequiredExpenseType(item.itemType)

  if (!isValidIsoDate(item.itemDate)) {
    issues.push('缺少日期')
  }
  if (isPlaceholderValue(item.itemType)) {
    issues.push('缺少费用项目')
  }
  if (isPlaceholderValue(item.itemReason)) {
    issues.push('缺少说明')
  }
  if (locationRequired && isPlaceholderValue(item.itemLocation)) {
    issues.push('缺少地点')
  }
  if (!Number.isFinite(Number(item.itemAmount)) || Number(item.itemAmount) <= 0) {
    issues.push('缺少金额')
  }
  if (isPlaceholderValue(item.invoiceId)) {
    issues.push('缺少票据标识')
  }

  return issues
}

function buildDraftBlockingIssues(request, expenseItems) {
  const issues = []
  const locationRequired = isLocationRequiredExpenseType(request.typeCode)

  if (isPlaceholderValue(request.profileName)) {
    issues.push('申请人未完善')
  }
  if (isPlaceholderValue(request.typeLabel)) {
    issues.push('报销类型未完善')
  }
  if (isPlaceholderValue(request.reason)) {
    issues.push('报销事由未完善')
  }
  if (locationRequired && isPlaceholderValue(request.location)) {
    issues.push('业务地点未完善')
  }
  if (isPlaceholderValue(request.occurredDisplay)) {
    issues.push('发生时间未完善')
  }
  if (!Number.isFinite(Number(request.amountValue)) || Number(request.amountValue) <= 0) {
    issues.push('报销金额未完善')
  }
  if (!expenseItems.length) {
    issues.push('费用明细不能为空')
  }

  expenseItems.forEach((item, index) => {
    buildExpenseDraftIssues(item).forEach((issue) => {
      issues.push(`费用明细第 ${index + 1} 条${issue}`)
    })
  })

  return [...new Set(issues)]
}

function mapIssueToAdvice(issue) {
  const text = String(issue || '').trim()
  if (!text) {
    return ''
  }

  if (text === '费用明细不能为空') {
    return '先新增至少 1 条费用明细，再补充金额、用途和附件。'
  }
  if (text === '申请人未完善') {
    return '补充申请人信息，确保审批单据归属明确。'
  }
  if (text === '所属部门未完善') {
    return '补充所属部门，便于财务和审批人识别成本归属。'
  }
  if (text === '报销类型未完善') {
    return '选择报销类型，明确本次费用归类。'
  }
  if (text === '报销事由未完善') {
    return '补充报销事由，说明本次费用用途。'
  }
  if (text === '业务地点未完善') {
    return '补充业务地点，方便审核业务发生场景。'
  }
  if (text === '发生时间未完善') {
    return '补充费用发生时间，确保单据时间完整。'
  }
  if (text === '报销金额未完善') {
    return '补充报销金额，并与费用明细金额保持一致。'
  }

  const itemMatch = text.match(/^费用明细第\s*(\d+)\s*条(.+)$/)
  if (!itemMatch) {
    return text
  }

  const [, indexText, fieldText] = itemMatch
  const labelPrefix = `完善第 ${indexText} 条费用明细`
  if (fieldText === '缺少日期') {
    return `${labelPrefix}的发生日期。`
  }
  if (fieldText === '缺少费用项目') {
    return `${labelPrefix}的费用项目。`
  }
  if (fieldText === '缺少说明') {
    return `${labelPrefix}的用途说明。`
  }
  if (fieldText === '缺少地点') {
    return `${labelPrefix}的业务地点。`
  }
  if (fieldText === '缺少金额') {
    return `${labelPrefix}的金额。`
  }
  if (fieldText === '缺少票据标识') {
    return `为第 ${indexText} 条费用明细上传或关联票据附件。`
  }

  return `${labelPrefix}。`
}

export default {
  name: 'TravelRequestDetailView',
  components: {
    ConfirmDialog
  },
  props: {
    request: {
      type: Object,
      default: () => ({})
    }
  },
  emits: ['backToRequests', 'openAssistant', 'request-updated', 'request-deleted'],
  setup(props, { emit }) {
    const { toast } = useToast()
    const { currentUser } = useSystemState()
    const editingExpenseId = ref('')
    const savingExpenseId = ref('')
    const creatingExpense = ref(false)
    const uploadingExpenseId = ref('')
    const deletingAttachmentId = ref('')
    const deletingExpenseId = ref('')
    const pendingUploadExpenseId = ref('')
    const submitBusy = ref(false)
    const deleteBusy = ref(false)
    const deleteDialogOpen = ref(false)
    const returnBusy = ref(false)
    const returnDialogOpen = ref(false)
    const expenseUploadInput = ref(null)
    const expenseAttachmentMeta = reactive({})
    const attachmentPreviewOpen = ref(false)
    const attachmentPreviewLoading = ref(false)
    const attachmentPreviewError = ref('')
    const attachmentPreviewUrl = ref('')
    const attachmentPreviewName = ref('')
    const attachmentPreviewMediaType = ref('')
    const expenseEditor = reactive({
      itemDate: '',
      itemType: 'other',
      itemReason: '',
      itemLocation: '',
      itemAmount: '',
      invoiceId: ''
    })

    const request = computed(() => {
      const normalized = normalizeRequestForUi(props.request)

      return (
        normalized || {
          id: 'EXP-202605-000',
          claimId: '',
          reason: '待补充报销事由',
          typeLabel: '其他费用',
          typeCode: 'other',
          detailVariant: 'general',
          sceneTarget: '待补充',
          location: '待补充',
          occurredDisplay: '待补充',
          applyTime: '待补充',
          amountDisplay: '￥0',
          amountValue: 0,
          node: '待提交',
          approval: '草稿',
          approvalKey: 'draft',
          approvalTone: 'draft',
          secondaryStatusLabel: '票据状态',
          secondaryStatusValue: '待补充',
          secondaryStatusTone: 'warning',
          relatedCustomer: '待补充',
          attachmentSummary: '待补充',
          riskSummary: '待补充',
          note: '',
          profileIdentity: '员工',
          profilePosition: '待补充',
          profileGrade: '待补充',
          profileManager: '待补充',
          profileName: '当前申请人',
          profileDepartment: '待补充部门',
          profileAvatar: '申'
        }
      )
    })

    const isTravelRequest = computed(() => request.value.detailVariant === 'travel')
    const isDraftRequest = computed(() => request.value.approvalKey === 'draft')
    const isEditableRequest = computed(() => ['draft', 'supplement'].includes(request.value.approvalKey))
    const canManageCurrentClaim = computed(() => canManageExpenseClaims(currentUser.value))
    const canDeleteRequest = computed(() => isEditableRequest.value || canManageCurrentClaim.value)
    const canReturnRequest = computed(() =>
      canManageCurrentClaim.value
      && request.value.approvalKey === 'in_progress'
      && Boolean(request.value.claimId)
    )
    const deleteActionLabel = computed(() => (isDraftRequest.value ? '删除草稿' : '删除单据'))
    const deleteDialogTitle = computed(() => `确认${deleteActionLabel.value} ${request.value.id} 吗？`)
    const deleteDialogDescription = computed(() =>
      isDraftRequest.value
        ? '删除后该草稿及其当前费用明细将不可恢复，请确认本次操作。'
        : '删除后该报销单及费用明细将不可恢复，请确认本次操作。'
    )
    const actionBusy = computed(() =>
      Boolean(savingExpenseId.value)
      || submitBusy.value
      || deleteBusy.value
      || returnBusy.value
      || creatingExpense.value
      || Boolean(uploadingExpenseId.value)
      || Boolean(deletingAttachmentId.value)
      || Boolean(deletingExpenseId.value)
    )

    const profile = computed(() => ({
      name: request.value.profileName,
      identity: request.value.profileIdentity,
      position: request.value.profilePosition,
      department: request.value.profileDepartment,
      grade: request.value.profileGrade,
      manager: request.value.profileManager,
      avatar: request.value.profileAvatar
    }))

    const expenseItems = ref([])

    watch(
      request,
      (nextRequest, previousRequest) => {
        expenseItems.value =
          Array.isArray(nextRequest.expenseItems)
            ? rebuildExpenseItems(nextRequest.expenseItems, nextRequest)
            : buildFallbackExpenseItems(nextRequest)
        if (nextRequest.claimId !== previousRequest?.claimId) {
          Object.keys(expenseAttachmentMeta).forEach((key) => {
            delete expenseAttachmentMeta[key]
          })
          closeAttachmentPreview()
        }
        pendingUploadExpenseId.value = ''
        uploadingExpenseId.value = ''
        deletingExpenseId.value = ''
        editingExpenseId.value = ''
        void syncExpenseAttachmentMeta()
      },
      { immediate: true }
    )

    const heroFactItems = computed(() => [
      {
        key: 'document',
        label: '报销单号',
        value: request.value.documentNo || request.value.id,
        icon: 'mdi mdi-camera-outline',
        valueClass: ''
      },
      {
        key: 'date',
        label: '日期',
        value: request.value.applyTime || request.value.occurredDisplay,
        icon: 'mdi mdi-calendar-month-outline',
        valueClass: ''
      },
      {
        key: 'amount',
        label: '报销金额',
        value: request.value.amountDisplay,
        icon: '',
        valueClass: 'amount'
      },
      {
        key: 'type',
        label: isTravelRequest.value ? '差旅类型' : '报销类型',
        value: request.value.typeLabel,
        icon: '',
        valueClass: ''
      },
      {
        key: 'status',
        label: '当前状态',
        value: request.value.node,
        icon: '',
        valueClass: 'status'
      }
    ])

    const progressSteps = computed(() =>
      Array.isArray(request.value.progressSteps) && request.value.progressSteps.length
        ? request.value.progressSteps
        : buildFallbackProgressSteps()
    )

    const currentProgressRingMotion = {
      initial: {
        scale: 1,
        opacity: 0.34
      },
      enter: {
        scale: [1, 1.42, 1.78],
        opacity: [0.34, 0.16, 0],
        transition: {
          duration: 3.2,
          repeat: Infinity,
          repeatType: 'loop',
          repeatDelay: 0.85,
          ease: 'easeOut',
          times: [0, 0.5, 1]
        }
      }
    }

    const expenseTotal = computed(() => {
      const total = expenseItems.value.reduce((sum, item) => sum + parseCurrency(item.amount), 0)
      return formatCurrency(total)
    })

    const uploadedExpenseCount = computed(() => expenseItems.value.filter((item) => item.attachments.length).length)
    const hasExpenseRiskColumn = computed(() => expenseItems.value.some((item) => item.attachments.length))
    const expenseTableColumnCount = computed(
      () => 5 + (hasExpenseRiskColumn.value ? 1 : 0) + (isEditableRequest.value ? 1 : 0)
    )
    const expenseSummaryText = computed(
      () => request.value.expenseTableSummary || '请继续补充票据、说明和系统校验结果。'
    )
    const detailNote = computed(
      () =>
        request.value.note
        || '暂无附加说明。可在这里补充特殊背景、例外原因、补件计划或其他需要财务和审批人重点关注的信息。'
    )
    const draftBlockingIssues = computed(() =>
      isEditableRequest.value ? buildDraftBlockingIssues(request.value, expenseItems.value) : []
    )
    const canSubmit = computed(() => isEditableRequest.value && draftBlockingIssues.value.length === 0 && !actionBusy.value)
    const locationInputPlaceholder = computed(() => resolveLocationInputPlaceholder(expenseEditor.itemType))

    function applyLocalExpenseItemPatch(itemId, patch) {
      expenseItems.value = rebuildExpenseItems(
        expenseItems.value.map((item) => (item.id === itemId ? { ...item, ...patch } : item)),
        request.value
      )
    }

    function resolveAttachmentMeta(item) {
      return expenseAttachmentMeta[item.id] || null
    }

    function resolveAttachmentDisplayName(item) {
      const metadata = resolveAttachmentMeta(item)
      return String(metadata?.file_name || item.attachmentHint || '').trim()
    }

    function resolveAttachmentRecognition(item) {
      const metadata = resolveAttachmentMeta(item)
      const documentInfo = metadata?.document_info
      const requirementCheck = metadata?.requirement_check
      if (!documentInfo && !requirementCheck) {
        return null
      }

      const fields = Array.isArray(documentInfo?.fields)
        ? documentInfo.fields
          .map((field) => ({
            label: String(field?.label || '').trim(),
            value: String(field?.value || '').trim()
          }))
          .filter((field) => field.label && field.value)
        : []

      return {
        documentTypeLabel:
          String(documentInfo?.document_type_label || '').trim()
          || resolveDocumentTypeLabel(documentInfo?.document_type),
        requirementLabel: requirementCheck
          ? (requirementCheck.matches ? '符合当前费用类型' : '不符合当前费用类型')
          : '待校验附件类型',
        requirementTone: requirementCheck
          ? (requirementCheck.matches ? 'pass' : 'high')
          : 'medium',
        message: String(requirementCheck?.message || '').trim(),
        fields: fields.slice(0, 4).map((field) => `${field.label}：${field.value}`)
      }
    }

    function buildAttachmentRiskNotice(attachment) {
      const analysis = attachment?.analysis
      const severity = String(analysis?.severity || '').trim()

      if (!analysis || severity === 'pass') {
        return ''
      }

      const label =
        String(analysis?.label || '').trim()
        || (severity === 'high' ? '高风险' : severity === 'medium' ? '中风险' : '低风险')
      const summary = String(analysis?.summary || analysis?.headline || '').trim() || '附件存在待核对风险。'
      return `${label}：${summary}`
    }

    async function refreshExpenseAttachmentMeta(itemId) {
      if (!request.value.claimId || !itemId) {
        return null
      }

      const payload = await fetchExpenseClaimItemAttachmentMeta(request.value.claimId, itemId)
      expenseAttachmentMeta[itemId] = payload
      return payload
    }

    function canPreviewAttachment(item) {
      const metadata = resolveAttachmentMeta(item)
      return Boolean(item.invoiceId && metadata?.previewable)
    }

    function revokeAttachmentPreviewUrl() {
      if (attachmentPreviewUrl.value && attachmentPreviewUrl.value.startsWith('blob:')) {
        URL.revokeObjectURL(attachmentPreviewUrl.value)
      }
      attachmentPreviewUrl.value = ''
    }

    function closeAttachmentPreview() {
      attachmentPreviewOpen.value = false
      attachmentPreviewLoading.value = false
      attachmentPreviewError.value = ''
      attachmentPreviewName.value = ''
      attachmentPreviewMediaType.value = ''
      revokeAttachmentPreviewUrl()
    }

    async function syncExpenseAttachmentMeta() {
      if (!request.value.claimId) {
        return
      }

      const tasks = expenseItems.value
        .filter((item) => item.invoiceId)
        .map(async (item) => {
          try {
            const payload = await fetchExpenseClaimItemAttachmentMeta(request.value.claimId, item.id)
            expenseAttachmentMeta[item.id] = payload
          } catch {
            delete expenseAttachmentMeta[item.id]
          }
        })

      Object.keys(expenseAttachmentMeta).forEach((itemId) => {
        if (!expenseItems.value.some((item) => item.id === itemId && item.invoiceId)) {
          delete expenseAttachmentMeta[itemId]
        }
      })

      await Promise.allSettled(tasks)
    }

    function resolveExpenseIssues(item) {
      return buildExpenseDraftIssues(item)
    }

    function resolveExpenseRiskState(item) {
      if (!item.invoiceId) {
        return null
      }

      if (uploadingExpenseId.value === item.id) {
        return {
          label: 'AI识别中',
          tone: 'medium',
          headline: 'AI提示：正在分析附件内容',
          summary: '附件已上传，系统正在识别票据内容与风险点，请稍候。',
          points: [],
          suggestion: ''
        }
      }

      const metadata = resolveAttachmentMeta(item)
      const analysis = metadata?.analysis
      if (analysis) {
        return {
          label: analysis.label || '已上传',
          tone: analysis.severity === 'pass' ? 'pass' : analysis.severity || 'low',
          headline: analysis.headline || 'AI提示',
          summary: analysis.summary || '',
          points: Array.isArray(analysis.points) ? analysis.points : [],
          suggestion: analysis.suggestion || ''
        }
      }

      return {
        label: '已上传',
        tone: 'low',
        headline: 'AI提示：附件已上传',
        summary: '附件已成功保存，当前可继续查看原图并人工核对票据内容。',
        points: [],
        suggestion: ''
      }
    }

    function showExpenseRisk(item) {
      return Boolean(resolveExpenseRiskState(item))
    }

    const aiAdvice = computed(() => {
      const completionItems = draftBlockingIssues.value.map(mapIssueToAdvice).filter(Boolean)
      const riskItems = expenseItems.value
        .map((item, index) => {
          const state = resolveExpenseRiskState(item)
          if (!state || !['medium', 'high'].includes(state.tone)) {
            return ''
          }

          const adviceText = String(state.suggestion || state.summary || '').trim()
          const prefix = state.tone === 'high' ? '优先整改' : '继续核对'
          return `第 ${index + 1} 条附件需${prefix}：${adviceText || '请根据系统提示补充或更换附件。'}`
        })
        .filter(Boolean)

      if (!completionItems.length && !riskItems.length) {
        return {
          tone: 'ready',
          badge: '可直接提交',
          summary: 'AI判断当前草稿已具备提交条件，可以直接发起审批。',
          items: [
            '点击右下角“提交审批”进入流程。',
            '提交前再核对一次合计金额与各条费用明细金额是否一致。',
            '如有特殊业务背景或例外情况，可在下方附加说明中补充。'
          ]
        }
      }

      const hasHighRisk = expenseItems.value.some((item) => resolveExpenseRiskState(item)?.tone === 'high')

      return {
        tone: hasHighRisk ? 'warning' : 'pending',
        badge: hasHighRisk ? '优先整改' : '待补信息',
        summary: completionItems.length
          ? '建议先补齐必填信息，再处理附件核验项，完成后即可提交审批。'
          : '草稿信息已基本齐全，建议先处理附件风险后再提交审批。',
        items: [...completionItems, ...riskItems]
      }
    })

    function startExpenseEdit(item) {
      if (!isEditableRequest.value || actionBusy.value) {
        return
      }

      editingExpenseId.value = item.id
      expenseEditor.itemDate = item.itemDate || ''
      expenseEditor.itemType = item.itemType || 'other'
      expenseEditor.itemReason = item.itemReason || (item.desc === '待补充' ? '' : item.desc)
      expenseEditor.itemLocation =
        item.itemLocation || (['待补充', '非必填'].includes(item.detail) ? '' : item.detail)
      expenseEditor.itemAmount = item.itemAmount ? String(item.itemAmount) : ''
      expenseEditor.invoiceId = item.invoiceId || ''
    }

    function cancelExpenseEdit() {
      editingExpenseId.value = ''
    }

    function validateExpenseEditor() {
      if (!isValidIsoDate(expenseEditor.itemDate)) {
        return '请输入正确的费用日期，格式为 YYYY-MM-DD。'
      }
      if (isPlaceholderValue(expenseEditor.itemType)) {
        return '请选择费用项目。'
      }
      if (isPlaceholderValue(expenseEditor.itemReason)) {
        return '请输入费用说明。'
      }
      if (
        isLocationRequiredExpenseType(expenseEditor.itemType)
        && isPlaceholderValue(expenseEditor.itemLocation)
      ) {
        return '请输入业务地点。'
      }

      const amount = Number(expenseEditor.itemAmount)
      if (!Number.isFinite(amount) || amount <= 0) {
        return '请输入大于 0 的费用金额。'
      }
      return ''
    }

    async function handleAddExpenseItem() {
      if (!isEditableRequest.value || actionBusy.value) {
        return
      }

      if (!request.value.claimId) {
        toast('当前草稿缺少 claimId，暂时无法新增费用明细。')
        return
      }

      creatingExpense.value = true
      try {
        const existingIds = new Set(expenseItems.value.map((item) => item.id))
        const claim = await createExpenseClaimItem(request.value.claimId, {})
        const createdItem = Array.isArray(claim?.items)
          ? claim.items.find((entry) => !existingIds.has(String(entry?.id || '')))
          : null

        if (!createdItem) {
          throw new Error('新增费用明细失败，请稍后重试。')
        }

        const nextItem = buildExpenseItemViewModel(createdItem, expenseItems.value.length, request.value)
        expenseItems.value = rebuildExpenseItems([...expenseItems.value, nextItem], request.value)
        creatingExpense.value = false
        startExpenseEdit(nextItem)
        toast('已新增一条费用明细，请继续填写。')
      } catch (error) {
        toast(error?.message || '新增费用明细失败，请稍后重试。')
      } finally {
        creatingExpense.value = false
      }
    }

    function triggerExpenseUpload(item) {
      if (!isEditableRequest.value || actionBusy.value) {
        return
      }

      if (!request.value.claimId) {
        toast('当前草稿缺少 claimId，暂时无法上传附件。')
        return
      }

      pendingUploadExpenseId.value = item.id
      if (expenseUploadInput.value) {
        expenseUploadInput.value.value = ''
        expenseUploadInput.value.click()
      }
    }

    async function openAttachmentPreview(item) {
      if (!request.value.claimId || !canPreviewAttachment(item)) {
        return
      }

      closeAttachmentPreview()
      attachmentPreviewOpen.value = true
      attachmentPreviewLoading.value = true
      attachmentPreviewName.value = resolveAttachmentDisplayName(item)
      const metadata = resolveAttachmentMeta(item)
      attachmentPreviewMediaType.value =
        String(metadata?.preview_kind || '').trim() === 'image'
          ? 'image/png'
          : String(metadata?.media_type || '').trim()

      try {
        const blob = await fetchExpenseClaimItemAttachmentPreview(request.value.claimId, item.id)
        revokeAttachmentPreviewUrl()
        attachmentPreviewUrl.value = URL.createObjectURL(blob)
        attachmentPreviewMediaType.value = blob.type || attachmentPreviewMediaType.value
      } catch (error) {
        attachmentPreviewError.value = error?.message || '附件预览失败，请稍后重试。'
      } finally {
        attachmentPreviewLoading.value = false
      }
    }

    async function uploadExpenseFile(item, file) {
      if (!item || !file) {
        return
      }

      uploadingExpenseId.value = item.id

      try {
        const payload = await uploadExpenseClaimItemAttachment(request.value.claimId, item.id, file)
        expenseAttachmentMeta[item.id] = payload?.attachment || null
        applyLocalExpenseItemPatch(item.id, {
          invoiceId: String(payload?.invoice_id || '').trim(),
          attachmentHint: String(payload?.attachment?.file_name || file.name || '').trim()
        })
        if (editingExpenseId.value === item.id) {
          expenseEditor.invoiceId = String(payload?.invoice_id || '').trim()
        }

        emit('request-updated', { claimId: request.value.claimId })
        const riskNotice = buildAttachmentRiskNotice(payload?.attachment)
        toast(riskNotice || payload?.message || `${file.name} 已关联到当前费用明细。`)
      } catch (error) {
        toast(error?.message || '附件上传失败，请稍后重试。')
      } finally {
        uploadingExpenseId.value = ''
      }
    }

    async function removeExpenseAttachment(item) {
      if (!request.value.claimId || !item?.invoiceId || actionBusy.value) {
        return
      }

      deletingAttachmentId.value = item.id
      try {
        const payload = await deleteExpenseClaimItemAttachment(request.value.claimId, item.id)
        delete expenseAttachmentMeta[item.id]
        applyLocalExpenseItemPatch(item.id, {
          invoiceId: '',
          attachmentHint: resolveExpenseUploadHint()
        })
        if (editingExpenseId.value === item.id) {
          expenseEditor.invoiceId = ''
        }
        if (attachmentPreviewOpen.value) {
          closeAttachmentPreview()
        }
        emit('request-updated', { claimId: request.value.claimId })
        toast(payload?.message || '附件已删除。')
      } catch (error) {
        toast(error?.message || '附件删除失败，请稍后重试。')
      } finally {
        deletingAttachmentId.value = ''
      }
    }

    async function handleExpenseFileChange(event) {
      const target = event?.target
      const file = target?.files?.[0]
      const itemId = pendingUploadExpenseId.value
      pendingUploadExpenseId.value = ''

      if (target) {
        target.value = ''
      }

      if (!file || !itemId) {
        return
      }

      const item = expenseItems.value.find((entry) => entry.id === itemId)
      if (!item) {
        toast('未找到对应的费用明细，请刷新后重试。')
        return
      }

      await uploadExpenseFile(item, file)
    }

    async function removeExpenseItem(item) {
      if (!request.value.claimId || !item?.id || actionBusy.value) {
        return
      }

      deletingExpenseId.value = item.id
      try {
        const payload = await deleteExpenseClaimItem(request.value.claimId, item.id)
        delete expenseAttachmentMeta[item.id]
        expenseItems.value = rebuildExpenseItems(
          expenseItems.value.filter((entry) => entry.id !== item.id),
          request.value
        )
        if (editingExpenseId.value === item.id) {
          editingExpenseId.value = ''
          expenseEditor.itemDate = ''
          expenseEditor.itemType = 'other'
          expenseEditor.itemReason = ''
          expenseEditor.itemLocation = ''
          expenseEditor.itemAmount = ''
          expenseEditor.invoiceId = ''
        }
        if (pendingUploadExpenseId.value === item.id) {
          pendingUploadExpenseId.value = ''
        }
        if (attachmentPreviewOpen.value) {
          closeAttachmentPreview()
        }
        emit('request-updated', { claimId: request.value.claimId })
        toast(payload?.message || '费用明细已删除。')
      } catch (error) {
        toast(error?.message || '费用明细删除失败，请稍后重试。')
      } finally {
        deletingExpenseId.value = ''
      }
    }

    async function saveExpenseEdit(item) {
      if (!request.value.claimId) {
        toast('当前草稿缺少 claimId，暂时无法保存费用明细。')
        return
      }

      const validationError = validateExpenseEditor()
      if (validationError) {
        toast(validationError)
        return
      }

      savingExpenseId.value = item.id
      try {
        const nextInvoiceId = expenseEditor.invoiceId.trim()
        await updateExpenseClaimItem(request.value.claimId, item.id, {
          item_date: expenseEditor.itemDate,
          item_type: expenseEditor.itemType,
          item_reason: expenseEditor.itemReason.trim(),
          item_location: expenseEditor.itemLocation.trim(),
          item_amount: Number(expenseEditor.itemAmount),
          invoice_id: nextInvoiceId
        })
        applyLocalExpenseItemPatch(item.id, {
          itemDate: expenseEditor.itemDate,
          itemType: expenseEditor.itemType,
          itemReason: expenseEditor.itemReason.trim(),
          itemLocation: expenseEditor.itemLocation.trim(),
          itemAmount: Number(expenseEditor.itemAmount),
          invoiceId: nextInvoiceId
        })
        let riskNotice = ''
        if (nextInvoiceId) {
          try {
            const attachment = await refreshExpenseAttachmentMeta(item.id)
            riskNotice = buildAttachmentRiskNotice(attachment)
          } catch {
            delete expenseAttachmentMeta[item.id]
          }
        } else {
          delete expenseAttachmentMeta[item.id]
        }
        editingExpenseId.value = ''
        toast(riskNotice || '费用明细已保存。')
        emit('request-updated', { claimId: request.value.claimId })
      } catch (error) {
        toast(error?.message || '费用明细保存失败，请稍后重试。')
      } finally {
        savingExpenseId.value = ''
      }
    }

    async function handleSubmit() {
      if (!request.value.claimId) {
        toast('当前草稿缺少 claimId，暂时无法提交。')
        return
      }

      if (!canSubmit.value) {
        toast(draftBlockingIssues.value[0] || '请先补全草稿信息，再提交审批。')
        return
      }

      submitBusy.value = true
      try {
        const payload = await submitExpenseClaim(request.value.claimId)
        const claimStatus = String(payload?.status || '').trim().toLowerCase()
        const approvalStage = String(payload?.approval_stage || payload?.approvalStage || '').trim()
        if (claimStatus === 'submitted') {
          toast(`${request.value.id} 已完成 AI预审${approvalStage ? `，当前节点：${approvalStage}` : '，并已提交审批'}。`)
        } else if (claimStatus === 'supplement') {
          toast(`${request.value.id} AI预审未通过，已转待补充。`)
        } else {
          toast(`${request.value.id} 提交结果已更新。`)
        }
        emit('request-updated', { claimId: request.value.claimId })
      } catch (error) {
        toast(error?.message || '提交审批失败，请稍后重试。')
      } finally {
        submitBusy.value = false
      }
    }

    async function handleDeleteRequest() {
      if (!request.value.claimId) {
        toast('当前单据缺少 claimId，暂时无法删除。')
        return
      }

      if (!canDeleteRequest.value) {
        toast('当前单据已进入流程，只有财务人员或高级管理人员可以删除。')
        return
      }

      deleteDialogOpen.value = true
    }

    function closeDeleteDialog() {
      if (deleteBusy.value) {
        return
      }

      deleteDialogOpen.value = false
    }

    async function confirmDeleteRequest() {
      if (!request.value.claimId) {
        toast('当前单据缺少 claimId，暂时无法删除。')
        return
      }

      deleteBusy.value = true
      try {
        const payload = await deleteExpenseClaim(request.value.claimId)
        deleteDialogOpen.value = false
        toast(payload?.message || `${request.value.id} 报销单已删除。`)
        emit('request-deleted', { claimId: request.value.claimId })
      } catch (error) {
        toast(error?.message || '删除单据失败，请稍后重试。')
      } finally {
        deleteBusy.value = false
      }
    }

    function handleReturnRequest() {
      if (!request.value.claimId) {
        toast('当前单据缺少 claimId，暂时无法退回。')
        return
      }

      if (!canReturnRequest.value) {
        toast('当前状态不支持退回。')
        return
      }

      returnDialogOpen.value = true
    }

    function closeReturnDialog() {
      if (returnBusy.value) {
        return
      }

      returnDialogOpen.value = false
    }

    async function confirmReturnRequest() {
      if (!request.value.claimId) {
        toast('当前单据缺少 claimId，暂时无法退回。')
        return
      }

      returnBusy.value = true
      try {
        await returnExpenseClaim(request.value.claimId, {
          reason: '详情页退回，请申请人调整后重新提交。'
        })
        returnDialogOpen.value = false
        toast(`${request.value.id} 已退回待提交。`)
        emit('request-updated', { claimId: request.value.claimId })
      } catch (error) {
        toast(error?.message || '退回单据失败，请稍后重试。')
      } finally {
        returnBusy.value = false
      }
    }

    function openAiEntry() {
      emit('openAssistant', {
        source: 'detail',
        prompt: '',
        request: request.value,
        restoreLatestConversation: true
      })
    }

    onBeforeUnmount(() => {
      closeAttachmentPreview()
    })

    return {
      emit,
      actionBusy,
      aiAdvice,
      attachmentPreviewError,
      attachmentPreviewLoading,
      attachmentPreviewMediaType,
      attachmentPreviewName,
      attachmentPreviewOpen,
      attachmentPreviewUrl,
      canDeleteRequest,
      canManageCurrentClaim,
      canReturnRequest,
      canSubmit,
      canPreviewAttachment,
      closeDeleteDialog,
      closeAttachmentPreview,
      closeReturnDialog,
      confirmDeleteRequest,
      confirmReturnRequest,
      currentProgressRingMotion,
      deleteActionLabel,
      deleteBusy,
      deleteDialogDescription,
      deleteDialogOpen,
      deleteDialogTitle,
      deletingAttachmentId,
      deletingExpenseId,
      detailNote,
      draftBlockingIssues,
      editingExpenseId,
      creatingExpense,
      expenseEditor,
      expenseItems,
      expenseSummaryText,
      expenseTableColumnCount,
      expenseTotal,
      expenseUploadInput,
      expenseTypeOptions: EXPENSE_TYPE_OPTIONS,
      handleAddExpenseItem,
      handleDeleteRequest,
      handleExpenseFileChange,
      handleReturnRequest,
      handleSubmit,
      hasExpenseRiskColumn,
      heroFactItems,
      isDraftRequest,
      isEditableRequest,
      isTravelRequest,
      locationInputPlaceholder,
      openAiEntry,
      openAttachmentPreview,
      profile,
      progressSteps,
      removeExpenseItem,
      request,
      removeExpenseAttachment,
      resolveAttachmentDisplayName,
      resolveAttachmentRecognition,
      resolveExpenseRiskState,
      resolveExpenseIssues,
      returnBusy,
      returnDialogOpen,
      savingExpenseId,
      showExpenseRisk,
      startExpenseEdit,
      submitBusy,
      triggerExpenseUpload,
      uploadedExpenseCount,
      uploadingExpenseId,
      cancelExpenseEdit,
      saveExpenseEdit
    }
  }
}