const KNOWLEDGE_INGEST_JOB_TYPES = new Set(['knowledge_index_sync', 'llm_wiki_sync'])

const STATUS_META = {
  queued: { label: '等待处理', tone: 'muted' },
  running: { label: '处理中', tone: 'warning' },
  succeeded: { label: '已完成', tone: 'success' },
  failed: { label: '失败', tone: 'danger' },
  skipped: { label: '已跳过', tone: 'muted' }
}

const PHASE_LABELS = {
  queued: '进入队列',
  indexing: '解析与索引',
  indexed: '索引完成',
  failed: '处理失败',
  completed: '任务完成'
}

export function isKnowledgeIngestRun(run) {
  const routeJson = asObject(run?.route_json)
  return KNOWLEDGE_INGEST_JOB_TYPES.has(String(routeJson.job_type || '').trim())
}

export function buildKnowledgeIngestLogModel(run) {
  const routeJson = asObject(run?.route_json)
  const ingest = asObject(routeJson.knowledge_ingest)
  const toolDocuments = extractToolDocuments(run)
  const sourceDocuments = normalizeSourceDocuments(
    ingest.documents,
    toolDocuments,
    routeJson.requested_document_ids
  )
  const documents = sourceDocuments.map(normalizeDocument)
  const graph = normalizeGraph(ingest.graph, documents)
  const progress = normalizeProgress(routeJson.progress, documents)
  const currentDocumentId = String(ingest.current_document_id || '').trim()

  return {
    available: isKnowledgeIngestRun(run),
    folder: String(routeJson.folder || '').trim(),
    phase: String(ingest.phase || routeJson.phase || '').trim(),
    phaseLabel: PHASE_LABELS[ingest.phase] || PHASE_LABELS[routeJson.phase] || '运行中',
    status: String(ingest.status || run?.status || '').trim(),
    statusLabel: resolveStatusMeta(ingest.status || run?.status).label,
    statusTone: resolveStatusMeta(ingest.status || run?.status).tone,
    progress,
    currentDocumentId,
    documents,
    selectedDocumentId: resolveDefaultDocumentId(documents, currentDocumentId),
    graph,
    metrics: [
      {
        label: '文件',
        value: `${progress.completedDocuments}/${progress.totalDocuments}`,
        hint: `失败 ${progress.failedDocuments}`
      },
      {
        label: 'Chunk',
        value: formatNumber(graph.chunkCount),
        hint: '已解析块'
      },
      {
        label: '实体',
        value: formatNumber(graph.entityCount),
        hint: '图谱节点'
      },
      {
        label: '关系',
        value: formatNumber(graph.relationCount),
        hint: '图谱边'
      }
    ]
  }
}

export function formatKnowledgeMetric(value) {
  return formatNumber(value)
}

function normalizeSourceDocuments(ingestDocuments, toolDocuments, requestedDocumentIds) {
  if (Array.isArray(ingestDocuments) && ingestDocuments.length) {
    return ingestDocuments
  }
  if (Array.isArray(toolDocuments) && toolDocuments.length) {
    return toolDocuments
  }
  if (Array.isArray(requestedDocumentIds)) {
    return requestedDocumentIds
      .map((documentId) => String(documentId || '').trim())
      .filter(Boolean)
      .map((documentId) => ({ document_id: documentId, name: documentId, status: 'queued' }))
  }
  return []
}

function extractToolDocuments(run) {
  const toolCalls = Array.isArray(run?.tool_calls) ? run.tool_calls : []
  for (const toolCall of [...toolCalls].reverse()) {
    const responseJson = asObject(toolCall?.response_json)
    if (Array.isArray(responseJson.documents) && responseJson.documents.length) {
      return responseJson.documents
    }
  }
  return []
}

function normalizeDocument(rawDocument) {
  const document = asObject(rawDocument)
  const documentId = String(document.document_id || document.id || '').trim()
  const status = String(document.status || 'queued').trim()
  const phase = String(document.phase || status).trim()
  const chunks = normalizeChunks(document.chunks)
  const sections = normalizeSections(document.sections)
  const entities = normalizeEntities(document.entities)
  const relations = normalizeRelations(document.relations)
  return {
    documentId,
    name: String(document.name || document.original_name || documentId || '未命名文件').trim(),
    folder: String(document.folder || '').trim(),
    extension: String(document.extension || '').trim(),
    mimeType: String(document.mime_type || '').trim(),
    status,
    statusLabel: resolveStatusMeta(status).label,
    statusTone: resolveStatusMeta(status).tone,
    phase,
    phaseLabel: PHASE_LABELS[phase] || PHASE_LABELS[status] || phase || '未开始',
    startedAt: String(document.started_at || '').trim(),
    finishedAt: String(document.finished_at || '').trim(),
    error: String(document.error || '').trim(),
    textChars: toNumber(document.text_chars),
    indexedTextChars: toNumber(document.indexed_text_chars),
    sectionCount: toNumber(document.section_count || sections.length),
    chunkCount: toNumber(document.chunk_count || chunks.length),
    chunkIds: normalizeTextList(document.chunk_ids),
    chunks,
    entityCount: toNumber(document.entity_count || entities.length),
    relationCount: toNumber(document.relation_count || relations.length),
    entities,
    relations,
    events: normalizeEvents(document.events)
  }
}

function normalizeProgress(rawProgress, documents) {
  const progress = asObject(rawProgress)
  const totalDocuments = toNumber(progress.total_documents || documents.length)
  const completedDocuments = toNumber(
    progress.completed_documents || documents.filter((item) => item.status === 'succeeded').length
  )
  const failedDocuments = toNumber(
    progress.failed_documents || documents.filter((item) => item.status === 'failed').length
  )
  const skippedDocuments = toNumber(progress.skipped_documents)
  const percent = clampPercent(
    progress.percent ?? calculatePercent(totalDocuments, completedDocuments + failedDocuments)
  )
  return {
    totalDocuments,
    completedDocuments,
    failedDocuments,
    skippedDocuments,
    percent
  }
}

function normalizeGraph(rawGraph, documents) {
  const graph = asObject(rawGraph)
  const fallbackEntities = dedupeTextList(documents.flatMap((item) => item.entities))
  const fallbackRelations = dedupeRelations(documents.flatMap((item) => item.relations))
  return {
    chunkCount: toNumber(
      graph.chunk_count || documents.reduce((total, item) => total + item.chunkCount, 0)
    ),
    entityCount: toNumber(
      graph.entity_count || documents.reduce((total, item) => total + item.entityCount, 0)
    ),
    relationCount: toNumber(
      graph.relation_count || documents.reduce((total, item) => total + item.relationCount, 0)
    ),
    entities: normalizeTextList(graph.entities).length
      ? normalizeTextList(graph.entities)
      : fallbackEntities,
    relations: normalizeRelations(graph.relations).length
      ? normalizeRelations(graph.relations)
      : fallbackRelations
  }
}

function normalizeChunks(rawChunks) {
  if (!Array.isArray(rawChunks)) return []
  return rawChunks
    .map((chunk, index) => {
      const item = asObject(chunk)
      return {
        id: String(item.id || item._id || `chunk-${index + 1}`).trim(),
        order: toNumber(item.order ?? item.chunk_order_index ?? index),
        tokens: toNumber(item.tokens),
        summary: String(item.summary || item.content || '').trim()
      }
    })
    .sort((left, right) => left.order - right.order)
}

function normalizeSections(rawSections) {
  if (!Array.isArray(rawSections)) return []
  return rawSections.map((section, index) => {
    const item = asObject(section)
    return {
      title: String(item.title || `章节 ${index + 1}`).trim(),
      excerpt: String(item.excerpt || '').trim()
    }
  })
}

function normalizeEvents(rawEvents) {
  if (!Array.isArray(rawEvents)) return []
  return rawEvents.map((event) => {
    const item = asObject(event)
    return {
      at: String(item.at || '').trim(),
      level: String(item.level || 'info').trim(),
      message: String(item.message || '').trim()
    }
  })
}

function normalizeEntities(rawEntities) {
  return normalizeTextList(rawEntities)
}

function normalizeRelations(rawRelations) {
  if (!Array.isArray(rawRelations)) return []
  return rawRelations
    .map((relation) => {
      const item = asObject(relation)
      return {
        source: String(item.source || item.from || '').trim(),
        target: String(item.target || item.to || '').trim(),
        type: String(item.type || '关联').trim()
      }
    })
    .filter((item) => item.source && item.target)
}

function resolveDefaultDocumentId(documents, currentDocumentId) {
  if (currentDocumentId && documents.some((item) => item.documentId === currentDocumentId)) {
    return currentDocumentId
  }
  return (
    documents.find((item) => item.status === 'running')?.documentId ||
    documents.find((item) => item.status === 'failed')?.documentId ||
    documents[0]?.documentId ||
    ''
  )
}

function resolveStatusMeta(status) {
  return STATUS_META[String(status || '').trim()] || STATUS_META.queued
}

function asObject(value) {
  return value && typeof value === 'object' && !Array.isArray(value) ? value : {}
}

function normalizeTextList(value) {
  if (!Array.isArray(value)) return []
  return dedupeTextList(value)
}

function dedupeTextList(items) {
  const result = []
  const seen = new Set()
  for (const item of items) {
    const text = String(item || '').trim()
    if (!text || seen.has(text)) continue
    seen.add(text)
    result.push(text)
  }
  return result
}

function dedupeRelations(items) {
  const result = []
  const seen = new Set()
  for (const item of items) {
    const source = String(item?.source || '').trim()
    const target = String(item?.target || '').trim()
    const type = String(item?.type || '关联').trim()
    const key = `${source}::${target}::${type}`
    if (!source || !target || seen.has(key)) continue
    seen.add(key)
    result.push({ source, target, type })
  }
  return result
}

function calculatePercent(total, done) {
  if (!total) return 0
  return Math.round((done / total) * 100)
}

function clampPercent(value) {
  const numericValue = toNumber(value)
  return Math.max(0, Math.min(100, numericValue))
}

function formatNumber(value) {
  const numericValue = toNumber(value)
  return Number.isFinite(numericValue) ? numericValue.toLocaleString('zh-CN') : '0'
}

function toNumber(value) {
  const numericValue = Number(value)
  return Number.isFinite(numericValue) ? numericValue : 0
}