// apps/api/src/queue/runner.ts
// Serial queue runner. One worker loop per process; jobs and their items run
// strictly in order. Each item flows through:
//   1. analyzer (api or mcp) → produces TaskPackage
//   2. judge → 6-dimension verdict + pass policy check
//   3. zip-export → produces *.task-package.zip on disk
//
// The actual analyzer / judge / export logic is delegated to apps/api/src/analyzers/*
// and apps/api/src/judge/*. This file just orchestrates state transitions.

import { join } from "node:path";
import { mkdirSync, readFileSync, writeFileSync } from "node:fs";

import { buildTaskPackage } from "@task-optimizer/core/rl-env";
import { parse as parseApiZip, buildEvidence as buildApiEvidence } from "@task-optimizer/core/importers/api";
import { parse as parseMcpZip, buildEvidence as buildMcpEvidence } from "@task-optimizer/core/importers/mcp";
import {
  collectMcpConfigUrls,
  collectMcpToolsFromTask,
  type PluginMcpTool,
} from "@task-optimizer/core/mcp-plugin-match";
import { runLocalRules } from "@task-optimizer/core/rules/mcp";
import { buildAnalysisZipBuffer } from "@task-optimizer/core/zip-export";
import * as apiPrompt from "@task-optimizer/core/prompts/api";
import * as mcpPrompt from "@task-optimizer/core/prompts/mcp";

import type { Config } from "../config.js";
import type { Logger } from "../log.js";
import { AiClient, safePreview } from "../ai/client.js";
import { runJudge, buildGoldenTrajectory } from "../judge/runner.js";
import { evaluateJudgePolicy } from "../judge/policy.js";
import {
  buildIterationMemoryPrompt,
  createIterationMemory,
  optimizeIterationMemory,
  type IterationMemory,
} from "./iteration-memory.js";
import type {
  DetectedMode,
  ItemRow,
  ItemStatus,
  Store,
} from "./store.js";

export interface QueueRunnerOptions {
  store: Store;
  config: Config;
  logger: Logger;
}

export interface OptionsSnapshot {
  /** Optional UI-requested grouping mode. Zip format detection remains separate. */
  requestedMode?: DetectedMode;
  model?: string;
  baseURL?: string;
  /**
   * Optional override for the main analyzer's API key (used to generate
   * recommended_groups + recommended_rubrics). When unset, the backend falls
   * back to `DEFAULT_API_KEY` from .env.
   */
  apiKey?: string;
  apiMode?: "chat" | "responses";
  /** Parallel item workers per job. Clamped to [1, MAX_CONCURRENCY=8]. */
  concurrency?: number;
  temperature?: number;
  topP?: number;
  maxTokens?: number;
  streaming?: boolean;
  enableThinking?: boolean;
  clearThinking?: boolean;
  ruleProfile?: string;
  optimizeTask?: boolean;
  feedback?: string;
  /** When true, pass policy requires total === max_total AND has_zeros === false. */
  strictFullMarks?: boolean;
  /** When strictFullMarks is true, allow task_complexity to be 1/2 while all other dimensions are full marks. */
  ignoreTaskComplexityForFullMarks?: boolean;
  judge?: {
    model?: string;
    baseURL?: string;
    apiMode?: "chat" | "responses";
    promptTemplate?: string;
  };
  rubricGeneration?: {
    model?: string;
    baseURL?: string;
    apiMode?: "chat" | "responses";
  };
  // NOTE: judge.apiKey / rubricGeneration.apiKey remain backend-only and are
  // sourced from .env.
}

interface InFlightJob {
  jobId: string;
  cancelRequested: boolean;
}

type AnalyzerResult = {
  mode: DetectedMode;
  parsed: unknown;
  evidence: Record<string, unknown>;
  flags: Array<{ code: string; note: string; evidence: unknown }>;
  result: unknown;
};

type TaskPackageResult = ReturnType<typeof buildTaskPackage>;
type JudgeRunResult = Awaited<ReturnType<typeof runJudge>>;

/**
 * Maximum analyzer + judge iterations per item. Each iteration feeds the
 * previous judge verdict back into the analyzer prompt.
 */
const MAX_JUDGE_ITERATIONS = 5;

/**
 * Hard cap on parallel item workers per job. Protects upstream model APIs
 * from rate-limit storms when a user uploads many ZIPs at once. The frontend
 * setting is clamped to [1, MAX_CONCURRENCY].
 */
const MAX_CONCURRENCY = 8;

class Semaphore {
  private active = 0;
  private readonly queue: Array<() => void> = [];

  constructor(private readonly limit: number) {}

  private async acquire(): Promise<void> {
    if (this.limit <= 0) return;
    if (this.active < this.limit) {
      this.active += 1;
      return;
    }
    await new Promise<void>((resolve) => this.queue.push(resolve));
  }

  private release(): void {
    if (this.limit <= 0) return;
    const next = this.queue.shift();
    if (next) {
      next();
      return;
    }
    this.active -= 1;
  }

  async run<T>(fn: () => Promise<T>): Promise<T> {
    if (this.limit <= 0) return fn();
    await this.acquire();
    try {
      return await fn();
    } finally {
      this.release();
    }
  }
}

/** Build the FEEDBACK block injected into the next analyzer prompt. */
function buildIterationFeedback(
  judgeResult: {
    total_score?: number;
    max_score?: number;
    has_zeros?: boolean;
    verdict?: string;
    rationale?: string;
    dimensions?: Record<string, { score?: number; explanation?: string }>;
  },
  iter: number
): string {
  const score = Number(judgeResult.total_score || 0);
  const maxScore = Number(judgeResult.max_score) || 12;
  const dims = judgeResult.dimensions || {};
  const weakDims = Object.entries(dims)
    .filter(([, v]) => Number(v?.score ?? 99) <= 1)
    .map(([key, v]) => {
      const reason = String(v?.explanation || "").slice(0, 320);
      return `- ${key} (score=${v?.score ?? "?"}/2): ${reason}`;
    });
  const rationale = String(judgeResult.rationale || "").slice(0, 480);
  return [
    `=== JUDGE FEEDBACK (iteration ${iter}, score ${score}/${maxScore}, has_zeros=${judgeResult.has_zeros ? "true" : "false"}) ===`,
    "",
    "TOP PRIORITY — EVIDENCE-FLOOR RULE:",
    "Every action verb in recommended_instruction MUST map to a real call in EVIDENCE_SUMMARY.",
    "If the judge cited an unsupported action or missing rubric, DELETE that verb from recommended_instruction",
    "and shrink the instruction so it describes only what the trajectory actually does.",
    "",
    "MANDATORY NEXT ITERATION BEHAVIOR:",
    "- Explicitly fix every issue listed below before changing unrelated fields.",
    "- Do NOT repeat any rubric name, checker_key, or task wording the judge criticized.",
    "- Prefer the smallest targeted edit that removes the cited judge complaint.",
    "- Task Complexity is allowed to remain below 2; do not invent extra work to inflate it.",
    "",
    rationale ? `JUDGE RATIONALE: ${rationale}` : "",
    weakDims.length
      ? "WEAK / ZERO DIMENSIONS:\n" + weakDims.join("\n")
      : "",
    "",
    "=== END JUDGE FEEDBACK ===",
  ]
    .filter(Boolean)
    .join("\n");
}

export class QueueRunner {
  private readonly store: Store;
  private readonly config: Config;
  private readonly logger: Logger;
  private readonly aiClient: AiClient;
  private readonly llmSemaphore: Semaphore;
  private readonly inFlight = new Map<string, InFlightJob>();
  private shuttingDown = false;

  constructor(opts: QueueRunnerOptions) {
    this.store = opts.store;
    this.config = opts.config;
    this.logger = opts.logger;
    this.aiClient = new AiClient({ upstreamProxy: opts.config.upstreamProxy });
    this.llmSemaphore = new Semaphore(Number(opts.config.globalLlmConcurrency || 0));
  }

  /** Schedule a job to run. Idempotent — if already running, no-op. */
  scheduleJob(jobId: string): void {
    if (this.shuttingDown) return;
    if (this.inFlight.has(jobId)) return;
    this.inFlight.set(jobId, { jobId, cancelRequested: false });
    void this.store.setJobStatus(jobId, "running");
    // Fire-and-forget: each job runs in parallel with other jobs. Per-job
    // concurrency is enforced inside runJob via N item workers. Errors are
    // logged inside runJob; this top-level catch only guards against the
    // unhandled-promise-rejection edge case.
    void this.runJob(jobId).catch((err) => {
      this.logger.error({ err, jobId }, "Unhandled error in runJob");
    });
  }

  cancelJob(jobId: string): void {
    const handle = this.inFlight.get(jobId);
    if (handle) handle.cancelRequested = true;
    // If the job is still queued (not started), mark its remaining items as
    // stopped immediately. The runner will skip them.
  }

  async retryItem(itemId: string): Promise<void> {
    const item = await this.store.getItem(itemId);
    if (!item) return;
    await this.store.resetItemForRetry(itemId);
    this.scheduleJob(item.job_id);
  }

  requestShutdown(): void {
    this.shuttingDown = true;
    for (const handle of this.inFlight.values()) handle.cancelRequested = true;
  }

  /** Run one job to completion (or cancellation). */
  private async runJob(jobId: string): Promise<void> {
    const log = this.logger.child({ jobId });
    const handle = this.inFlight.get(jobId);
    if (!handle) {
      log.warn("Job worker invoked but no in-flight handle present");
      return;
    }

    // Concurrency is read from the job's options snapshot (frontend-supplied).
    // Falls back to 1 (serial) when unset; capped to MAX_CONCURRENCY.
    const job = await this.store.getJob(jobId);
    const snapshot = parseOptionsSnapshot(job?.options_snapshot);
    const requested = Number(snapshot.concurrency) || 1;
    const concurrency = Math.max(
      1,
      Math.min(MAX_CONCURRENCY, Math.floor(requested))
    );
    log.info({ concurrency }, "Job worker starting");

    try {
      // Spawn N parallel workers. Each loops, atomically taking the next
      // queued item via SQLite transaction (takeNextQueuedItem) until none
      // remain or cancellation is requested.
      const workers = Array.from({ length: concurrency }, (_, i) =>
        this.itemWorker(jobId, handle, i + 1)
      );
      await Promise.all(workers);

      if (handle.cancelRequested || this.shuttingDown) {
        // Mark all remaining queued items as stopped.
        for (const it of await this.store.listItemsByJob(jobId)) {
          if (it.status === "queued") await this.store.setItemStatus(it.id, "stopped");
        }
        await this.store.setJobStatus(jobId, "cancelled");
        log.info("Job cancelled");
      } else {
        await this.store.setJobStatus(jobId, "completed");
        log.info("Job completed");
      }
    } catch (err) {
      log.error({ err }, "Job worker crashed");
      await this.store.setJobStatus(jobId, "completed"); // surface via item statuses
    } finally {
      this.inFlight.delete(jobId);
    }
  }

  /**
   * Single-worker drain loop. Multiple of these run in parallel within one
   * job. Each call to takeNextQueuedItem is atomic (SQLite transaction), so
   * workers never observe the same item.
   */
  private async itemWorker(
    jobId: string,
    handle: InFlightJob,
    workerIndex: number
  ): Promise<void> {
    const log = this.logger.child({ jobId, worker: workerIndex });
    while (!handle.cancelRequested && !this.shuttingDown) {
      const next = await this.store.takeNextQueuedItem(jobId);
      if (!next) return; // queue drained
      try {
        await this.runItem(next, jobId);
      } catch (err) {
        log.error({ err, itemId: next.id }, "Item runner threw unexpectedly");
      }
    }
  }

  /** Run a single item end-to-end. */
  private async runItem(item: ItemRow, jobId: string): Promise<void> {
    const log = this.logger.child({ jobId, itemId: item.id });
    log.info({ filename: item.filename, detectedMode: item.detected_mode }, "Item start");

    const itemDir = join(this.config.exportDir, jobId, item.id);
    try {
      mkdirSync(itemDir, { recursive: true });
    } catch (err) {
      log.error({ err, itemDir }, "Failed to create item export directory");
      await this.failItem(
        item.id,
        err instanceof Error ? err.message : String(err),
        "create_export_directory",
      );
      return;
    }

    let stage = "initializing";
    let uploadBytes: Buffer | null = null;
    let latestAnalysis: AnalyzerResult | null = null;
    let latestTaskPackage: TaskPackageResult | null = null;
    let latestJudge: JudgeRunResult | null = null;
    let bestAnalysis: AnalyzerResult | null = null;
    let bestTaskPackage: TaskPackageResult | null = null;
    let bestJudge: JudgeRunResult | null = null;
    let bestScore = -1;
    let lastJudge: JudgeRunResult | null = null;
    let iter = 0;
    let completedIterations = 0;
    let iterationMemory = createIterationMemory();
    try {
      stage = "loading_job_options";
      const job = await this.store.getJob(jobId);
      const snapshot = parseOptionsSnapshot(job?.options_snapshot);
      stage = "reading_upload";
      uploadBytes = readFileSync(item.upload_path);

      // ── Iterate analyzer + judge up to MAX_JUDGE_ITERATIONS times ──────
      // Each round feeds the previous judge verdict back into the analyzer
      // prompt so the model can refine the package.
      const handle = this.inFlight.get(jobId);
      let extraFeedback = "";
      let passed = false;

      for (iter = 1; iter <= MAX_JUDGE_ITERATIONS; iter++) {
        if (handle?.cancelRequested || this.shuttingDown) break;
        log.info({ iter, max: MAX_JUDGE_ITERATIONS }, "Iteration start");

        // ── Stage 1: analyzer ─────────────────────────────────────────────
        stage = `iteration_${iter}:analyzer`;
        await this.transitionItem(item.id, "running", undefined, stage);
        const analysis = await this.runAnalyzer(
          item,
          uploadBytes,
          snapshot,
          extraFeedback
        );
        stage = `iteration_${iter}:build_task_package`;
        const taskPackage = buildTaskPackage(
          analysis.result,
          analysis.evidence,
          analysis.parsed,
          buildGoldenTrajectory
        );
        latestAnalysis = analysis;
        latestTaskPackage = taskPackage;
        if (!bestAnalysis || !bestTaskPackage) {
          bestAnalysis = analysis;
          bestTaskPackage = taskPackage;
        }

        // Persist the analyzer output before calling Judge. If Judge is
        // unavailable (for example HTTP 403), the generated groups/rubrics still
        // remain inspectable and downloadable.
        writeJson(join(itemDir, `evidence-iter-${iter}.json`), {
          mode: analysis.mode,
          detectedMode: item.detected_mode,
          flags: analysis.flags,
          evidence: analysis.evidence,
          analyzerResult: analysis.result,
        });
        writeJson(join(itemDir, `task-package-iter-${iter}.json`), taskPackage);

        // ── Stage 2: judge ────────────────────────────────────────────────
        stage = `iteration_${iter}:judge`;
        await this.transitionItem(item.id, "judging", undefined, stage);
        const judgeResult = await this.withLlmSlot(() =>
          runJudge({
            aiClient: this.aiClient,
            config: this.config,
            snapshot,
            taskPackage,
            evidence: analysis.evidence,
          }),
        );
        latestJudge = judgeResult;
        lastJudge = judgeResult;
        const score = Number(judgeResult.total_score || 0);
        if (score > bestScore) {
          bestScore = score;
          bestAnalysis = analysis;
          bestTaskPackage = taskPackage;
          bestJudge = judgeResult;
        }

        writeJson(join(itemDir, `judge-result-iter-${iter}.json`), judgeResult);
        const iterationFeedback = buildIterationFeedback(judgeResult, iter);
        iterationMemory = optimizeIterationMemory(
          iterationMemory,
          judgeResult,
          iter,
          iterationFeedback,
        );
        writeJson(join(itemDir, `iteration-memory-iter-${iter}.json`), iterationMemory);
        completedIterations = iter;

        if (isJudgeTargetSatisfied(judgeResult, snapshot)) {
          log.info(
            { iter, score, verdict: judgeResult.verdict },
            "Judge target satisfied"
          );
          passed = true;
          break;
        }

        log.info(
          { iter, score, max: MAX_JUDGE_ITERATIONS },
          "Judge target not yet satisfied; preparing next iteration"
        );
        extraFeedback = buildIterationMemoryPrompt(iterationMemory);
      }

      // Persist canonical artefacts (best round) for downstream consumers.
      stage = "persisting_final_artifacts";
      const finalAnalysis = bestAnalysis ?? latestAnalysis;
      const finalTaskPackage = bestTaskPackage ?? latestTaskPackage;
      const finalJudge = bestJudge ?? lastJudge;
      if (!finalAnalysis || !finalTaskPackage) {
        throw new Error("迭代未产生任何可用结果（可能在第一次迭代前被取消或失败）。");
      }

      // ── Stage 3: ZIP export ─────────────────────────────────────────────
      // Export the best task package even when Judge does not pass, so users
      // can inspect and reuse the generated groups/rubrics.
      stage = "zip_export";
      const exportZipPath = await this.persistExportableArtifacts({
        item,
        itemDir,
        uploadBytes,
        analysis: finalAnalysis,
        taskPackage: finalTaskPackage,
        judgeResult: finalJudge,
        iterations: completedIterations || Math.min(iter, MAX_JUDGE_ITERATIONS),
        passed,
        iterationMemory,
      });

      if (!finalJudge) {
        throw new Error("Judge 未产生可用结果，但分组和 rubric 已生成并导出。");
      }

      if (!passed) {
        const message =
          buildJudgeFailureMessage(finalJudge, finalTaskPackage, snapshot) +
          `\n（已迭代 ${completedIterations}/${MAX_JUDGE_ITERATIONS} 轮，最佳 ${bestScore} 分）`;
        throw new Error(message);
      }

      await this.transitionItem(item.id, "completed", undefined, stage);
      log.info(
        {
          exportZipPath,
          verdict: finalJudge.verdict,
          score: finalJudge.total_score,
          iterations: iter,
        },
        "Item completed"
      );
    } catch (err) {
      if (uploadBytes && latestAnalysis && latestTaskPackage) {
        try {
          await this.persistExportableArtifacts({
            item,
            itemDir,
            uploadBytes,
            analysis: bestAnalysis ?? latestAnalysis,
            taskPackage: bestTaskPackage ?? latestTaskPackage,
            judgeResult: bestJudge ?? latestJudge ?? lastJudge,
            iterations: completedIterations || Math.min(Math.max(iter, 1), MAX_JUDGE_ITERATIONS),
            passed: false,
            iterationMemory,
          });
        } catch (exportErr) {
          log.error({ err: exportErr }, "Failed to preserve analyzer artifacts after item error");
        }
      }
      const details = serializeError(err, {
        stage,
        jobId,
        itemId: item.id,
        ordinal: item.ord,
        filename: item.filename,
      });
      const message = errorPreview(err, details);
      writeFileSync(join(itemDir, "error.txt"), message + "\n");
      const errorDetailsPath = join(itemDir, "error-details.json");
      writeJson(errorDetailsPath, details);
      if (
        isTransientItemError(err) &&
        Number(item.attempt_count || 0) < Number(this.config.itemMaxAttempts || 3)
      ) {
        await this.transitionItem(
          item.id,
          "queued",
          `Transient failure, retrying (${item.attempt_count}/${this.config.itemMaxAttempts}): ${message}`,
          stage,
          errorDetailsPath,
        );
        log.warn(
          { preview: message, attempt: item.attempt_count, maxAttempts: this.config.itemMaxAttempts },
          "Item failed transiently; requeued for retry",
        );
        return;
      }
      await this.failItem(item.id, message, stage, errorDetailsPath);
      log.error({ err, preview: message }, "Item failed");
    }
  }

  private async runAnalyzer(
    item: ItemRow,
    uploadBytes: Buffer,
    snapshot: OptionsSnapshot,
    extraFeedback = ""
  ): Promise<AnalyzerResult> {
    const mode = resolveRequestedMode(snapshot, item.detected_mode);
    const isMcp = mode === "mcp";
    const parsed = isMcp
      ? await parseMcpZip(uploadBytes, item.filename)
      : await parseApiZip(uploadBytes, item.filename);
    let evidence: Record<string, unknown>;
    if (isMcp) {
      const toolResolution = await resolvePluginMcpTools(parsed, this.logger.child({ itemId: item.id }));
      evidence = buildMcpEvidence(parsed as never, {
        strictPluginMcp: true,
        pluginMcpTools: toolResolution.tools,
        pluginMcpToolSource: toolResolution.source,
      }) as unknown as Record<string, unknown>;
      assertStrictMcpEvidenceReady(evidence, item.filename);
    } else {
      evidence = { type: "http", ...buildApiEvidence(parsed as never) } as Record<string, unknown>;
    }
    const flags = runLocalRules(evidence);
    const promptModule = isMcp ? mcpPrompt : apiPrompt;
    const slimEvidence = promptModule.buildSlimEvidence(evidence);
    const system = promptModule.getSystemPrompt();
    const baseFeedback = snapshot.feedback || "";
    const mergedFeedback = [baseFeedback, extraFeedback].filter(Boolean).join("\n\n");
    const user = promptModule.buildUserPrompt(
      slimEvidence,
      flags,
      mergedFeedback,
      { optimizeTask: snapshot.optimizeTask }
    );
    const apiMode = snapshot.apiMode || this.config.defaultApiMode;
    const result = await this.withLlmSlot(() =>
      this.aiClient.requestJson(
        {
          apiKey: snapshot.apiKey || this.config.defaultApiKey,
          baseURL: snapshot.baseURL || this.config.defaultBaseURL,
          apiMode,
          model: snapshot.model || this.config.defaultModel,
          temperature: snapshot.temperature ?? 0,
          topP: snapshot.topP ?? 1,
          maxTokens: snapshot.maxTokens || 16384,
          enableThinking: false,
          clearThinking: true,
        },
        [
          { role: "system", content: system },
          { role: "user", content: user },
        ],
        {
          schema: apiMode === "responses" ? promptModule.RESULT_SCHEMA : undefined,
          schemaName: "task_optimizer_analyzer_result",
          stream: false,
          jsonMode: apiMode === "chat",
          jsonModeFallback: true,
          retries: 2,
          maxTokens: snapshot.maxTokens || 16384,
        },
      ),
    );
    return { mode, parsed, evidence, flags, result };
  }

  private async persistExportableArtifacts(input: {
    item: ItemRow;
    itemDir: string;
    uploadBytes: Buffer;
    analysis: AnalyzerResult;
    taskPackage: TaskPackageResult;
    judgeResult?: JudgeRunResult | null;
    iterations: number;
    passed: boolean;
    iterationMemory?: IterationMemory | null;
  }): Promise<string> {
    const evidencePath = join(input.itemDir, "evidence.json");
    writeJson(evidencePath, {
      mode: input.analysis.mode,
      detectedMode: input.item.detected_mode,
      flags: input.analysis.flags,
      evidence: input.analysis.evidence,
      analyzerResult: input.analysis.result,
      iterations: input.iterations,
      passed: input.passed,
      iterationMemory: input.iterationMemory ?? null,
    });

    const taskPackagePath = join(input.itemDir, "task-package.json");
    writeJson(taskPackagePath, input.taskPackage);

    const paths: Parameters<Store["setItemPaths"]>[1] = {
      evidencePath,
      taskPackagePath,
    };
    if (input.judgeResult) {
      const judgeResultPath = join(input.itemDir, "judge-result.json");
      writeJson(judgeResultPath, input.judgeResult);
      paths.judgeResultPath = judgeResultPath;
    }
    await this.store.setItemPaths(input.item.id, paths);

    const builtZip = await buildAnalysisZipBuffer({
      originalZipBytes: input.uploadBytes,
      taskPackage: input.taskPackage,
      mode: input.analysis.mode,
      originalFilename: input.item.filename,
    });
    const exportZipPath = join(input.itemDir, builtZip.filename);
    writeFileSync(exportZipPath, builtZip.buffer);
    await this.store.setItemPaths(input.item.id, { exportZipPath });
    return exportZipPath;
  }

  private async failItem(
    itemId: string,
    message: string,
    lastStage?: string,
    errorDetailsPath?: string,
  ): Promise<void> {
    await this.transitionItem(itemId, "failed", message, lastStage, errorDetailsPath);
  }

  private async transitionItem(
    itemId: string,
    status: ItemStatus,
    errorPreview?: string,
    lastStage?: string,
    errorDetailsPath?: string,
  ): Promise<void> {
    await this.store.setItemStatus(itemId, status, errorPreview, {
      lastStage: lastStage ?? null,
      errorDetailsPath: errorDetailsPath ?? null,
    });
  }

  private async withLlmSlot<T>(fn: () => Promise<T>): Promise<T> {
    return this.llmSemaphore.run(fn);
  }
}

function parseOptionsSnapshot(raw: string | undefined): OptionsSnapshot {
  if (!raw) return {};
  try {
    const parsed = JSON.parse(raw);
    return parsed && typeof parsed === "object" ? parsed : {};
  } catch (_) {
    return {};
  }
}

function resolveRequestedMode(
  snapshot: OptionsSnapshot,
  detectedMode: DetectedMode
): DetectedMode {
  return snapshot.requestedMode === "api" || snapshot.requestedMode === "mcp"
    ? snapshot.requestedMode
    : detectedMode;
}

function writeJson(path: string, value: unknown): void {
  writeFileSync(path, JSON.stringify(value, null, 2));
}

function isJudgeTargetSatisfied(
  judgeResult: {
    total_score?: number;
    max_score?: number;
    has_zeros?: boolean;
    verdict?: string;
    dimensions?: Record<string, { score?: number; explanation?: string }>;
  },
  snapshot: OptionsSnapshot
): boolean {
  return evaluateJudgePolicy(judgeResult, snapshot).passed;
}

function buildJudgeFailureMessage(
  judgeResult: { total_score?: number; max_score?: number; dimensions?: Record<string, { score?: number; explanation?: string }> },
  taskPackage: Record<string, unknown>,
  snapshot: OptionsSnapshot = {},
): string {
  const maxScore = Number(judgeResult.max_score) || 12;
  const requirement = snapshot.strictFullMarks
    ? snapshot.ignoreTaskComplexityForFullMarks
      ? "要求除 TASK COMPLEXITY 外其他维度满分。"
      : "要求满分且无 0 分。"
    : "要求 >=10 且无 0 分。";
  const dims = judgeResult.dimensions || {};
  const weak = Object.entries(dims)
    .filter(([, value]) => Number(value && value.score) === 0)
    .map(([key, value]) => key + ": " + String((value && value.explanation) || "").slice(0, 240));
  const limits = Array.isArray(taskPackage.evidence_limits) ? taskPackage.evidence_limits : [];
  const rerecordReason = String(taskPackage.rerecord_required_reason || "");
  return [
    "Judge 未达到 Chrome 插件标准：得分 " + Number(judgeResult.total_score || 0) + "/" + maxScore + "，" + requirement,
    weak.length ? "0 分维度：" + weak.join("；") : "",
    rerecordReason ? "重录建议：" + rerecordReason : "",
    limits.length ? "证据限制：" + limits.map(String).join("；") : "",
  ].filter(Boolean).join("\n");
}

async function resolvePluginMcpTools(parsed: any, log: Logger): Promise<{ tools: PluginMcpTool[]; source: string }> {
  const embedded = Array.isArray(parsed?.pluginMcpTools) ? parsed.pluginMcpTools : [];
  if (embedded.length) return { tools: embedded, source: parsed.pluginMcpToolSource || "task.json" };

  const urls = collectMcpConfigUrls({ taskJson: parsed?.taskJson, networkJson: parsed?.networkJson });
  const errors: string[] = [];
  for (const url of urls) {
    try {
      const controller = new AbortController();
      const timer = setTimeout(() => controller.abort(), 8000);
      const response = await fetch(url, { signal: controller.signal });
      clearTimeout(timer);
      if (!response.ok) {
        errors.push(url + " -> HTTP " + response.status);
        continue;
      }
      const payload = await response.json();
      const tools = collectMcpToolsFromTask(payload);
      if (tools.length) return { tools, source: url };
      errors.push(url + " -> no tools");
    } catch (err) {
      errors.push(url + " -> " + ((err as Error)?.message || String(err)));
    }
  }
  if (urls.length) {
    log.warn({ urls, errors: errors.slice(0, 8) }, "Failed to resolve plugin MCP tools from config URLs");
  }
  return {
    tools: [],
    source: urls.length ? "mcp_config_unavailable" : (parsed?.pluginMcpToolSource || "unavailable"),
  };
}

function assertStrictMcpEvidenceReady(evidence: Record<string, unknown>, filename: string): void {
  if (evidence?.type !== "mcp") return;
  const status = evidence.mcpToolsStatus as
    | { available?: boolean; reason?: string; source?: string; matchedCount?: number; toolCount?: number }
    | undefined;
  const calls = Array.isArray(evidence.calls) ? evidence.calls : [];
  if (status && status.available === false) {
    throw new Error(
      [
        "严格 MCP 不可用：" + filename + " 没有可用的 Chrome 插件 tools config。",
        "source=" + (status.source || "unknown"),
        status.reason ? "reason=" + status.reason : "",
        "请确认原始 task/metadata 中带有 MCP tools，或重新用插件采集包含 MCP config 的 recording。",
      ].filter(Boolean).join("\n"),
    );
  }
  if (!calls.length) {
    throw new Error(
      [
        "严格 MCP 没有匹配到任何插件可见 MCP call：" + filename,
        status
          ? `source=${status.source || "unknown"}, tools=${status.toolCount || 0}, matched=${status.matchedCount || 0}`
          : "",
        "后端不会再把 HTTP 请求伪造成 MCP call；请补采 MCP tools config 或重录。",
      ].filter(Boolean).join("\n"),
    );
  }
}

export function isTransientItemError(err: unknown): boolean {
  const anyErr = err as { name?: string; message?: string; status?: number; retryable?: boolean };
  const message = String(anyErr?.message || err || "");
  if (/严格 MCP|Judge 未达到|zip 缺少|zip 格式未识别|校验失败|schema invalid|not valid JSON/i.test(message)) {
    return false;
  }
  if (anyErr?.retryable === true) return true;
  const status = Number(anyErr?.status || 0);
  if (status === 429 || (status >= 500 && status < 600)) return true;
  return /AbortError|aborted|timeout|ECONNRESET|ECONNREFUSED|ENOTFOUND|EAI_AGAIN|fetch failed|terminated/i.test(
    String(anyErr?.name || "") + " " + message,
  );
}

function serializeError(err: unknown, context: Record<string, unknown>): Record<string, unknown> {
  const anyErr = err as {
    name?: string;
    message?: string;
    stack?: string;
    rawPreview?: string;
    status?: number;
    endpoint?: string;
    apiMode?: string;
    cause?: unknown;
  };
  return {
    ...context,
    name: anyErr?.name || (err && typeof err === "object" ? err.constructor?.name : typeof err),
    message: anyErr?.message || String(err),
    rawPreview: anyErr?.rawPreview,
    status: anyErr?.status,
    endpoint: anyErr?.endpoint,
    apiMode: anyErr?.apiMode,
    cause:
      anyErr?.cause instanceof Error
        ? { name: anyErr.cause.name, message: anyErr.cause.message, stack: anyErr.cause.stack }
        : anyErr?.cause,
    stack: anyErr?.stack,
    aborted: /AbortError|aborted|abort/i.test(String(anyErr?.name || "") + " " + String(anyErr?.message || "")),
    cancelled: /cancel|stopped/i.test(String(anyErr?.message || "")),
    terminated: /terminated/i.test(String(anyErr?.message || "")),
  };
}

function errorPreview(err: unknown, details?: Record<string, unknown>): string {
  const anyErr = err as { rawPreview?: string; message?: string };
  const stage = details?.stage ? "stage=" + String(details.stage) + "\n" : "";
  const message = anyErr?.rawPreview || anyErr?.message || String(err);
  return safePreview(stage + message).slice(0, 2048);
}