#!/usr/bin/env python3
"""
agents_health_check.py — Tier 1 快速健康检查（Linux/246 部署版）
============================================================
每 5 分钟触发。对所有注册服务做检查：PID存活 → 端口监听 → HTTP /health。
异常时写 TODO 给 self_todo_executor 消费。正常时静默。

部署：Linux crontab: */5 * * * * cd /home/hmo/AgentsMeeting/gateway/scripts && /usr/bin/python3 agents_health_check.py >> ../logs/health_check.log 2>&1
"""
import json, os, sys, socket, subprocess
from datetime import datetime
from urllib.request import urlopen, Request
from urllib.error import HTTPError, URLError

SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
GATEWAY_DIR = os.path.dirname(SCRIPT_DIR)
BASE = os.path.dirname(GATEWAY_DIR)
TEMP = os.path.join(GATEWAY_DIR, "temp")
LOGS = os.path.join(GATEWAY_DIR, "logs")
os.makedirs(TEMP, exist_ok=True)
os.makedirs(LOGS, exist_ok=True)

NOW = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
TODO_FILE = os.path.join(TEMP, "health_todos.jsonl")
REPORT_FILE = os.path.join(TEMP, "last_health_check.json")
HEALTH_LOG = os.path.join(LOGS, "health_check_report.log")

# ── 服务注册表（Linux 246 视角）──────────────────────────────
# 本机服务用 127.0.0.1，远程服务用实际 IP + HTTP only
SERVICES = [
    # === 本机服务（246）===
    {
        "name": "dashboard",
        "host": "127.0.0.1",
        "port": 5803,
        "health_url": "http://127.0.0.1:5803/api/health",
        "fix_cmd": ["sudo", "systemctl", "restart", "agentsmeeting-dashboard"],
        "remote": False,
        "critical": True,
    },
    {
        "name": "hermes_gateway_mohe",
        "host": "127.0.0.1",
        "port": 8642,
        "health_url": "http://127.0.0.1:8642/v1/health",
        "fix_cmd": ["sudo", "systemctl", "restart", "hermes-gateway@mohe"],
        "remote": False,
        "critical": True,
    },
    {
        "name": "hermes_gateway_zhiwei",
        "host": "127.0.0.1",
        "port": 8643,
        "health_url": "http://127.0.0.1:8643/v1/health",
        "fix_cmd": ["sudo", "systemctl", "restart", "hermes-gateway@zhiwei"],
        "remote": False,
        "critical": True,
    },
    {
        "name": "wechat_bridge",
        "host": "127.0.0.1",
        "port": 3001,
        "health_url": None,  # TCP only
        "fix_cmd": ["docker", "restart", "wxBotWebhook"],
        "remote": False,
        "critical": True,
    },
    # === 远程服务（跨网 HTTP 检查）===
    {
        "name": "xmpp_bot_xxm",
        "host": "192.168.1.16",
        "port": 5802,
        "health_url": "http://192.168.1.16:5802/health",
        "fix_cmd": None,  # 远程服务无法自动修复
        "remote": True,
        "critical": True,
    },
    {
        "name": "article_processor",
        "host": "192.168.1.16",
        "port": 5810,
        "health_url": "http://192.168.1.16:5810/health",
        "fix_cmd": None,
        "remote": True,
        "critical": False,
    },
]


# ── 检查基元（Linux 原生）────────────────────────────────
def log(msg):
    ts = datetime.now().strftime("%H:%M:%S")
    line = f"[{ts}] {msg}"
    with open(HEALTH_LOG, "a", encoding="utf-8") as f:
        f.write(line + "\n")


def pid_alive(pid):
    """发送信号 0 测试进程存活。"""
    try:
        os.kill(pid, 0)
        return True
    except (ProcessLookupError, PermissionError):
        return False


def port_open(host, port, timeout=3):
    """socket connect 测试端口是否监听。"""
    try:
        s = socket.create_connection((host, port), timeout=timeout)
        s.close()
        return True
    except (socket.timeout, ConnectionRefusedError, OSError):
        return False


def http_check(url, timeout=5):
    """HTTP /health 检查。返回 (ok, detail)。"""
    if not url:
        return (True, "no_health_url")
    try:
        req = Request(url)
        with urlopen(req, timeout=timeout) as r:
            return (r.status == 200, f"HTTP {r.status}")
    except HTTPError as e:
        return (e.code in (401, 403), f"HTTP {e.code}")
    except URLError as e:
        return (False, str(e.reason)[:60])
    except Exception as e:
        return (False, str(e)[:60])


def write_todo(name, issue):
    """写 TODO 供 executor 消费。"""
    entry = {
        "created": NOW,
        "service": name,
        "issue": issue,
        "status": "pending",
    }
    with open(TODO_FILE, "a", encoding="utf-8") as f:
        f.write(json.dumps(entry, ensure_ascii=False) + "\n")
    log(f"TODO: {name} — {issue}")


# ── 主检查 ────────────────────────────────────────────
def main():
    report = {"time": NOW, "services": [], "summary": {"total": 0, "ok": 0, "fail": 0}}
    dirty = False

    for svc in SERVICES:
        name = svc["name"]
        host = svc["host"]
        port = svc["port"]
        url = svc.get("health_url")
        is_remote = svc.get("remote", False)
        critical = svc.get("critical", True)

        entry = {"name": name, "critical": critical}
        report["services"].append(entry)
        report["summary"]["total"] += 1

        # 1. Port check（socket connect，跨平台）
        port_ok = port_open(host, port)
        entry["port_ok"] = port_ok

        # 2. HTTP check
        if port_ok:
            ok, detail = http_check(url, timeout=5 if is_remote else 8)
            entry["http_ok"] = ok
            entry["http_detail"] = detail
        else:
            entry["http_ok"] = False
            entry["http_detail"] = "port_closed"

        # 3. 判定：Port+HTTP OK = 健康
        primary_ok = port_ok and entry.get("http_ok", False)
        entry["status"] = "ok" if primary_ok else "fail"

        if primary_ok:
            report["summary"]["ok"] += 1
        else:
            report["summary"]["fail"] += 1
            dirty = True
            reasons = []
            if not port_ok:
                reasons.append("port_closed")
            if port_ok and not entry.get("http_ok"):
                reasons.append(f"http_{entry.get('http_detail','?')}")
            issue = f"异常: {' + '.join(reasons)}"
            write_todo(name, issue)

    # 输出报告
    summary = report["summary"]
    if dirty:
        log(f"=== 健康检查: {summary['ok']}/{summary['total']} OK, {summary['fail']} FAIL ===")
        for s in report["services"]:
            if s["status"] == "fail":
                print(f"[FAIL] {s['name']}: PORT={s['port_ok']} HTTP={s.get('http_detail','?')}")
    else:
        log(f"=== 健康检查: {summary['ok']}/{summary['total']} 全部正常 ===")

    with open(REPORT_FILE, "w", encoding="utf-8") as f:
        json.dump(report, f, ensure_ascii=False, indent=2)


if __name__ == "__main__":
    main()