export function formatFieldLabel(field) {
  const key = String(field?.key || '').trim()
  const label = String(field?.display || field?.label || '').trim()
  if (!key) return label || '-'
  if (!label || label === key) return key
  return label.includes(`[${key}]`) ? label : `${label}[${key}]`
}

export function buildResultFields(result, fields = []) {
  const values = result?.field_values && typeof result.field_values === 'object'
    ? result.field_values
    : {}
  return Object.entries(values).slice(0, 8).map(([key, value]) => ({
    key,
    label: formatFieldLabel(fields.find((field) => field.key === key) || { key }),
    value: Array.isArray(value) ? value.join('、') : String(value ?? '-')
  }))
}

export function buildRecognizedFieldRows(result, fields = []) {
  const rows = Array.isArray(result?.recognized_fields) ? result.recognized_fields : []
  return rows.slice(0, 12).map((field, index) => ({
    key: String(field?.key || `field-${index}`),
    label: formatFieldLabel(
      fields.find((item) => item.key === field?.key) || {
        key: field?.key,
        label: field?.label
      }
    ),
    source: formatRecognitionSource(field?.source),
    value: formatDebugValue(field?.value)
  }))
}

export function buildEvidenceItems(result, fields = []) {
  const evidence = result?.evidence && typeof result.evidence === 'object'
    ? result.evidence
    : {}
  const items = []
  if (Array.isArray(evidence.failed_conditions)) {
    evidence.failed_conditions.slice(0, 3).forEach((condition) => {
      const left = Array.isArray(condition.left_values) ? condition.left_values.join('、') : '-'
      const right = Array.isArray(condition.right_values) ? condition.right_values.join('、') : '-'
      items.push(`${formatFieldName(condition.left, fields)}：${left}；${formatFieldName(condition.right, fields)}：${right}`)
    })
  }
  if (Array.isArray(evidence.missing_fields)) {
    evidence.missing_fields.slice(0, 5).forEach((field) => {
      items.push(`${formatFieldName(field, fields)} 缺失`)
    })
  }
  if (Array.isArray(evidence.keyword_hits)) {
    items.push(`命中关键词：${evidence.keyword_hits.join('、')}`)
  }
  if (evidence.condition_summary) {
    items.push(String(evidence.condition_summary))
  }
  return [...new Set(items)].slice(0, 5)
}

export function buildTraceItems(result, fields = []) {
  const steps = Array.isArray(result?.trace?.steps) ? result.trace.steps : []
  return steps.slice(0, 6).map((step, index) => {
    const title = String(step?.title || step?.node_id || `判断 ${index + 1}`).trim()
    const status = step?.result ? '成立' : '不成立'
    const inputs = step?.inputs && typeof step.inputs === 'object'
      ? Object.entries(step.inputs).slice(0, 3).map(([key, value]) => `${formatFieldName(key, fields)}=${formatDebugValue(value)}`).join('；')
      : ''
    return inputs ? `${title}：${status}；${inputs}` : `${title}：${status}`
  })
}

export function buildDocumentBrief(document) {
  const fields = Array.isArray(document?.document_fields) ? document.document_fields : []
  if (fields.length) {
    return fields.slice(0, 6).map((field) => `${field.label}：${field.value}`).join('；')
  }
  return String(document?.summary || document?.text || '未提取到结构化字段').slice(0, 120)
}

export function formatDocumentMeta(document) {
  const labels = [
    document?.document_type_label || '',
    document?.scene_label || '',
    document?.avg_score ? `置信度 ${Math.round(Number(document.avg_score) * 100)}%` : ''
  ].filter(Boolean)
  return labels.join(' · ') || '未分类'
}

export function resolveFileStatusLabel(file) {
  return file.statusText || {
    pending: '待发送',
    recognizing: '识别中',
    recognized: '已识别',
    failed: '识别失败'
  }[file.status] || '待识别'
}

export function trimDebugText(text, maxLength = 800) {
  const value = String(text || '').replace(/\s+/g, ' ').trim()
  if (!value) return ''
  return value.length > maxLength ? `${value.slice(0, maxLength)}...` : value
}

function formatRecognitionSource(source) {
  return {
    manual: '手动输入',
    ocr: 'OCR结构字段',
    inferred: '文本推断',
    model_refined: '模型过滤'
  }[String(source || '').trim()] || '未标注来源'
}

function formatDebugValue(value) {
  if (Array.isArray(value)) return value.map((item) => String(item ?? '')).filter(Boolean).join('、') || '-'
  if (value && typeof value === 'object') return JSON.stringify(value)
  return String(value ?? '-')
}

function formatFieldName(key, fields) {
  return formatFieldLabel(fields.find((field) => field.key === key) || { key })
}