// ST-BME: 提取编排控制器（纯函数）
// 通过 runtime 依赖注入，避免直接访问 index.js 模块级状态。

export async function executeExtractionBatchController(
  runtime,
  {
    chat,
    startIdx,
    endIdx,
    settings,
    smartTriggerDecision = null,
    signal = undefined,
  } = {},
) {
  runtime.ensureCurrentGraphRuntimeState();
  runtime.throwIfAborted(signal, "提取已终止");

  const currentGraph = runtime.getCurrentGraph();
  const lastProcessed = runtime.getLastProcessedAssistantFloor();
  const extractionCountBefore = runtime.getExtractionCount();
  const beforeSnapshot = runtime.cloneGraphSnapshot(currentGraph);
  const messages = runtime.buildExtractionMessages(chat, startIdx, endIdx, settings);
  const batchStatus = runtime.createBatchStatusSkeleton({
    processedRange: [startIdx, endIdx],
    extractionCountBefore,
  });

  runtime.console.log(
    `[ST-BME] 开始提取: 楼层 ${startIdx}-${endIdx}` +
      (smartTriggerDecision?.triggered
        ? ` [智能触发 score=${smartTriggerDecision.score}; ${smartTriggerDecision.reasons.join(" / ")}]`
        : ""),
  );

  const result = await runtime.extractMemories({
    graph: currentGraph,
    messages,
    startSeq: startIdx,
    endSeq: endIdx,
    lastProcessedSeq: lastProcessed,
    schema: runtime.getSchema(),
    embeddingConfig: runtime.getEmbeddingConfig(),
    extractPrompt: undefined,
    settings,
    signal,
    onStreamProgress: ({ previewText, receivedChars }) => {
      const preview =
        previewText?.length > 60 ? "…" + previewText.slice(-60) : previewText || "";
      runtime.setLastExtractionStatus(
        "AI 生成中",
        `${preview}  [${receivedChars}字]`,
        "running",
        { noticeMarquee: true },
      );
    },
  });

  if (!result.success) {
    runtime.setBatchStageOutcome(
      batchStatus,
      "core",
      "failed",
      result?.error || "提取阶段未返回有效操作",
    );
    runtime.finalizeBatchStatus(batchStatus, runtime.getExtractionCount());
    runtime.getCurrentGraph().historyState.lastBatchStatus = batchStatus;
    return {
      success: false,
      result,
      effects: null,
      batchStatus,
      error: result?.error || "提取阶段未返回有效操作",
    };
  }

  runtime.setBatchStageOutcome(batchStatus, "core", "success");
  const effects = await runtime.handleExtractionSuccess(
    result,
    endIdx,
    settings,
    signal,
    batchStatus,
  );
  const finalizedBatchStatus =
    effects?.batchStatus ||
    runtime.finalizeBatchStatus(batchStatus, runtime.getExtractionCount());

  runtime.getCurrentGraph().historyState.lastBatchStatus = {
    ...finalizedBatchStatus,
    historyAdvanced: runtime.shouldAdvanceProcessedHistory(finalizedBatchStatus),
  };

  if (runtime.getCurrentGraph().historyState.lastBatchStatus.historyAdvanced) {
    runtime.updateProcessedHistorySnapshot(chat, endIdx);
  }

  const afterSnapshot = runtime.cloneGraphSnapshot(runtime.getCurrentGraph());
  const postProcessArtifacts = runtime.computePostProcessArtifacts(
    beforeSnapshot,
    afterSnapshot,
    effects?.postProcessArtifacts || [],
  );
  runtime.appendBatchJournal(
    runtime.getCurrentGraph(),
    runtime.createBatchJournalEntry(beforeSnapshot, afterSnapshot, {
      processedRange: [startIdx, endIdx],
      postProcessArtifacts,
      vectorHashesInserted: effects?.vectorHashesInserted || [],
      extractionCountBefore,
    }),
  );
  runtime.saveGraphToChat({ reason: "extraction-batch-complete" });

  return {
    success: finalizedBatchStatus.completed,
    result,
    effects,
    batchStatus: finalizedBatchStatus,
    error: finalizedBatchStatus.completed
      ? ""
      : effects?.vectorError ||
        finalizedBatchStatus.errors?.[0] ||
        "批次未完成 finalize 闭环",
  };
}

export async function runExtractionController(runtime) {
  if (runtime.getIsExtracting() || !runtime.getCurrentGraph()) return;

  const settings = runtime.getSettings();
  if (!settings.enabled) return;
  if (!runtime.ensureGraphMutationReady("自动提取", { notify: false })) {
    runtime.setLastExtractionStatus(
      "等待图谱加载",
      runtime.getGraphMutationBlockReason("自动提取"),
      "warning",
      { syncRuntime: true },
    );
    return;
  }
  if (!(await runtime.recoverHistoryIfNeeded("auto-extract"))) return;

  const context = runtime.getContext();
  const chat = context.chat;
  if (!chat || chat.length === 0) return;

  const assistantTurns = runtime.getAssistantTurns(chat);
  const lastProcessed = runtime.getLastProcessedAssistantFloor();
  const unprocessedAssistantTurns = assistantTurns.filter((i) => i > lastProcessed);

  if (unprocessedAssistantTurns.length === 0) return;

  const extractEvery = runtime.clampInt(settings.extractEvery, 1, 1, 50);
  const smartTriggerDecision = settings.enableSmartTrigger
    ? runtime.getSmartTriggerDecision(chat, lastProcessed, settings)
    : { triggered: false, score: 0, reasons: [] };

  if (
    unprocessedAssistantTurns.length < extractEvery &&
    !smartTriggerDecision.triggered
  ) {
    return;
  }

  const batchAssistantTurns = smartTriggerDecision.triggered
    ? unprocessedAssistantTurns
    : unprocessedAssistantTurns.slice(0, extractEvery);
  const startIdx = batchAssistantTurns[0];
  const endIdx = batchAssistantTurns[batchAssistantTurns.length - 1];
  runtime.setIsExtracting(true);
  const extractionController = runtime.beginStageAbortController("extraction");
  const extractionSignal = extractionController.signal;
  runtime.setLastExtractionStatus(
    "提取中",
    `楼层 ${startIdx}-${endIdx}${smartTriggerDecision.triggered ? " · 智能触发" : ""}`,
    "running",
    { syncRuntime: true },
  );

  try {
    const batchResult = await runtime.executeExtractionBatch({
      chat,
      startIdx,
      endIdx,
      settings,
      smartTriggerDecision,
      signal: extractionSignal,
    });

    if (!batchResult.success) {
      const message =
        batchResult.error ||
        batchResult?.result?.error ||
        "提取批次未返回有效结果";
      runtime.console.warn("[ST-BME] 提取批次未返回有效结果:", message);
      runtime.notifyExtractionIssue(message);
      return;
    }

    runtime.setLastExtractionStatus(
      "提取完成",
      `楼层 ${startIdx}-${endIdx} · 新建 ${batchResult.result?.newNodes || 0} · 更新 ${batchResult.result?.updatedNodes || 0} · 新边 ${batchResult.result?.newEdges || 0}`,
      "success",
      { syncRuntime: true },
    );
  } catch (e) {
    if (runtime.isAbortError(e)) {
      runtime.setLastExtractionStatus(
        "提取已终止",
        e?.message || "已手动终止当前提取",
        "warning",
        {
          syncRuntime: true,
        },
      );
      return;
    }
    runtime.console.error("[ST-BME] 提取失败:", e);
    runtime.notifyExtractionIssue(e?.message || String(e) || "自动提取失败");
  } finally {
    runtime.finishStageAbortController("extraction", extractionController);
    runtime.setIsExtracting(false);
  }
}