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

function uniqueTexts(values) {
  return [...new Set(values.map((item) => normalizeText(item)).filter(Boolean))]
}

function isPlaceholderValue(value) {
  const text = normalizeText(value)
  if (!text) {
    return true
  }
  return ['待补充', '暂无', '无', '未知', '处理中'].includes(text.replace(/\s+/g, ''))
}

function isApplicationDocumentRequest(requestModel) {
  const documentType = normalizeText(
    requestModel?.documentTypeCode
    || requestModel?.document_type_code
    || requestModel?.documentType
    || requestModel?.document_type
  ).toLowerCase()
  const claimNo = normalizeText(requestModel?.claimNo || requestModel?.claim_no || requestModel?.documentNo).toUpperCase()
  return documentType === 'application' || claimNo.startsWith('AP-') || claimNo.startsWith('APP-')
}

function isHotelExpenseItem(item) {
  const text = [
    item?.itemType,
    item?.typeCode,
    item?.name,
    item?.category,
    item?.desc,
    item?.itemReason
  ].map((value) => normalizeText(value)).join(' ')
  return /hotel_ticket|hotel|住宿|酒店|水单/.test(text)
}

export function buildTravelReceiptMaterialPrompts(requestModel, items) {
  if (isApplicationDocumentRequest(requestModel)) {
    return []
  }

  const normalizedItems = Array.isArray(items) ? items : []
  const missingHotelItems = normalizedItems.filter(
    (item) => !item?.isSystemGenerated && isHotelExpenseItem(item) && isPlaceholderValue(item.invoiceId)
  )
  if (!missingHotelItems.length) {
    return []
  }

  return [
    `当前包含 ${missingHotelItems.length} 条住宿费用明细，但暂未关联住宿发票或酒店水单。请补充住宿材料，避免后续被退回补件。`
  ]
}

function profileMetric(profile, key) {
  const profiles = Array.isArray(profile?.profiles) ? profile.profiles : []
  for (const item of profiles) {
    const metrics = item?.metrics && typeof item.metrics === 'object' ? item.metrics : {}
    const value = Number(metrics[key])
    if (Number.isFinite(value) && value > 0) {
      return value
    }
  }
  return 0
}

function profileReviewSuggestionTexts(profile) {
  const suggestions = Array.isArray(profile?.review_suggestions)
    ? profile.review_suggestions
    : Array.isArray(profile?.reviewSuggestions)
      ? profile.reviewSuggestions
      : []
  return suggestions
    .map((item) => normalizeText(item?.message || item?.title || item?.label))
    .filter(Boolean)
}

function profileRiskTagTexts(profile) {
  const tags = Array.isArray(profile?.profile_tags)
    ? profile.profile_tags
    : Array.isArray(profile?.profileTags)
      ? profile.profileTags
      : []
  return tags
    .filter((tag) => normalizeText(tag?.polarity) === 'risk')
    .map((tag) => normalizeText(tag?.reason || tag?.display_label || tag?.label))
    .filter(Boolean)
}

export function buildEmployeeProfileAdviceItems(profile) {
  if (!profile || typeof profile !== 'object') {
    return []
  }

  const returnCount = profileMetric(profile, 'return_count')
  const missingAttachmentCount = profileMetric(profile, 'missing_attachment_count')
  const invoiceMismatchCount = profileMetric(profile, 'invoice_mismatch_count')
  const missingContextCount = profileMetric(profile, 'missing_business_context_count')
  const items = []

  if (returnCount > 0) {
    items.push(`历史退单建议：近 90 天存在 ${returnCount} 次退单或退回记录，提交前重点复核退回原因对应的票据、事由和说明，避免重复被退。`)
  }
  if (missingAttachmentCount > 0 || missingContextCount > 0) {
    items.push(`材料完整性建议：历史材料或业务上下文缺失累计 ${missingAttachmentCount + missingContextCount} 项，本次提交前请重点核对附件、事由、地点和补充说明。`)
  }
  if (invoiceMismatchCount > 0) {
    items.push(`票据一致性建议：历史存在 ${invoiceMismatchCount} 次票据不一致记录，本次请重点核对票据日期、城市、金额和费用明细。`)
  }

  return uniqueTexts([
    ...items,
    ...profileReviewSuggestionTexts(profile),
    ...profileRiskTagTexts(profile)
  ]).slice(0, 4)
}