// HLDP-ZY://agents/zhuyuan-dev-agent/modules/brain-writer.js
// @guardian: ICE-GL-ZY001 · 铸渊
// @sovereign: TCS-0002∞ · 冰朔
// @copyright: 国作登字-2026-A-00037559
// 铸渊工程Agent · HLDP大脑记录器 v2.0
// v2.0: 新增 recordExperience · recordLesson · getExperienceContext

const fs = require("fs");
const path = require("path");

const AGENT_ID = process.env.AGENT_ID || "ICE-GL-BD001";
const TERRITORY = path.join(__dirname, "..", "agents", AGENT_ID.replace("ICE-GL-BD", "BD"));
const EXPERIENCE_DIR = path.join(TERRITORY, "experience");

function ensureExpDir() { if (!fs.existsSync(EXPERIENCE_DIR)) { try { fs.mkdirSync(EXPERIENCE_DIR, { recursive: true }); } catch(e) {} } }

function record(taskId, entry) {
  if (!fs.existsSync(TERRITORY)) return;
  const file = path.join(TERRITORY, "brain", "cognitive-record.hldp");
  const lines = ["","@task: " + taskId,"@time: " + new Date().toISOString(),"@input: " + (entry.input || ""),"@decision: " + (entry.decision || ""),"@execution: " + (entry.execution || ""),"@failure: " + (entry.failure || "无"),"@reasoning: " + (entry.reasoning || ""),"@fix: " + (entry.fix || ""),"@learned: " + (entry.learned || ""),"@confidence: " + (entry.confidence || "N/A"),"@new_knowledge: " + (entry.new_knowledge ? "true" : "false")];
  fs.appendFileSync(file, lines.join("\n") + "\n", "utf-8");
}

function recordExperience(planId, summary) {
  ensureExpDir();
  if (!fs.existsSync(TERRITORY)) return;
  const entry = { plan_id: planId, timestamp: new Date().toISOString(), summary: { total: summary.total || 0, done: summary.done || 0, failed: summary.failed || 0, skipped: summary.skipped || 0 }, lessons: [], errors: [] };
  if (summary.results) {
    for (const r of summary.results) {
      if (r.ok) {
        entry.lessons.push({ type: "success", action: r.action, target: r._task_target || "", detail: r._substep_detail || "" });
      } else if (r.skipped) {
        const errMsg = (r.error || "").slice(0, 200);
        let rootCause = "未知";
        if (errMsg.includes("illegal operation on a directory")) rootCause = "路径指向目录而非文件";
        else if (errMsg.includes("not found")) rootCause = "Shell命令不存在";
        else if (errMsg.includes("待指定") || errMsg.includes("未指定")) rootCause = "LLM扩展返回了模糊占位符";
        else if (errMsg.includes("无效")) rootCause = "参数验证失败";
        entry.errors.push({ action: r.action, target: r._task_target || "", error: errMsg, root_cause: rootCause });
        entry.lessons.push({ type: "failure", action: r.action, target: r._task_target || "", error: errMsg, root_cause: rootCause, learned: "下次执行时需要确保" + rootCause });
      }
    }
  }
  const expFile = path.join(EXPERIENCE_DIR, planId + "-" + Date.now() + ".json");
  fs.writeFileSync(expFile, JSON.stringify(entry, null, 2), "utf-8");
  updateExperienceIndex(planId, entry);
  console.log("[BrainWriter v2] 经验已记录: " + planId + " · " + entry.lessons.length + " 条经验");
  return entry;
}

function updateExperienceIndex(planId, entry) {
  const indexFile = path.join(EXPERIENCE_DIR, "index.json");
  let index = { total: 0, plans: [], top_errors: [] };
  if (fs.existsSync(indexFile)) { try { index = JSON.parse(fs.readFileSync(indexFile, "utf-8")); } catch(e) {} }
  index.total++;
  index.plans.push({ plan_id: planId, timestamp: entry.timestamp, summary: entry.summary });
  for (const lesson of entry.lessons) {
    if (lesson.type === "failure") {
      const existing = index.top_errors.find(e => e.root_cause === lesson.root_cause);
      if (existing) existing.count++;
      else index.top_errors.push({ root_cause: lesson.root_cause, count: 1, example: (lesson.error||"").slice(0, 100) });
    }
  }
  index.top_errors.sort((a, b) => b.count - a.count);
  index.top_errors = index.top_errors.slice(0, 10);
  index.plans = index.plans.slice(-20);
  fs.writeFileSync(indexFile, JSON.stringify(index, null, 2), "utf-8");
}

function getExperienceContext() {
  const indexFile = path.join(EXPERIENCE_DIR, "index.json");
  if (!fs.existsSync(indexFile)) return "";
  try {
    const index = JSON.parse(fs.readFileSync(indexFile, "utf-8"));
    const lines = ["","【BD001历史执行经验】","  总执行次数: " + index.total];
    if (index.plans.length > 0) lines.push("  最近: " + index.plans.slice(-3).map(p => p.plan_id + "(" + p.summary.done + "/" + p.summary.total + ")").join(", "));
    if (index.top_errors.length > 0) {
      lines.push("  常见错误:");
      for (const e of index.top_errors.slice(0, 5)) lines.push("    - " + e.root_cause + " (" + e.count + "次)");
    }
    return lines.join("\n");
  } catch(e) { return ""; }
}

function recordErrorPattern(pattern) {
  if (!fs.existsSync(TERRITORY)) return;
  const file = path.join(TERRITORY, "memory", "error-patterns.json");
  const data = JSON.parse(fs.readFileSync(file, "utf-8"));
  const existing = data.patterns.find(p => p.type === pattern.type);
  if (existing) { existing.count++; existing.last_seen = new Date().toISOString(); }
  else { data.patterns.push({ type: pattern.type, description: pattern.description, count: 1, first_seen: new Date().toISOString(), last_seen: new Date().toISOString(), examples: [pattern.example] }); }
  fs.writeFileSync(file, JSON.stringify(data, null, 2), "utf-8");
}

function recordMilestone(event) {
  if (!fs.existsSync(TERRITORY)) return;
  const file = path.join(TERRITORY, "brain", "growth-timeline.json");
  const data = JSON.parse(fs.readFileSync(file, "utf-8"));
  data.milestones.push({ time: new Date().toISOString(), event: event, project: process.env.CURRENT_PROJECT_ID || "unknown" });
  fs.writeFileSync(file, JSON.stringify(data, null, 2), "utf-8");
}

function recordLesson(type, detail) {
  ensureExpDir();
  if (!fs.existsSync(TERRITORY)) return;
  const lessonFile = path.join(EXPERIENCE_DIR, "raw-lessons.jsonl");
  fs.appendFileSync(lessonFile, JSON.stringify({ time: new Date().toISOString(), type, detail }) + "\n", "utf-8");
}

module.exports = { record, recordErrorPattern, recordMilestone, recordExperience, recordLesson, getExperienceContext, TERRITORY, AGENT_ID };