import psutil
from datetime import datetime


class SystemMonitor:
    def __init__(self, messenger, ollama_manager):
        self.messenger = messenger
        self.ollama_monitor = ollama_manager
        self.last_health_check = datetime.now()

    def check_health(self):
        """시스템 상태 점검 및 알림 (CPU, RAM, GPU) - 3분마다 실행"""
        now = datetime.now()
        if (now - self.last_health_check).total_seconds() < 180:  # 5분 → 3분
            return

        self.last_health_check = now
        alerts = []

        # 1. CPU Check (non-blocking 측정)
        cpu_usage = psutil.cpu_percent(interval=0)

        if cpu_usage > 90:
            # 검증: 상위 프로세스 CPU 합계 확인
            top_processes = []
            for proc in psutil.process_iter(['pid', 'name', 'cpu_percent']):
                try:
                    if proc.info['name'] == 'System Idle Process':
                        continue
                    top_processes.append(proc.info)
                except (psutil.NoSuchProcess, psutil.AccessDenied):
                    pass

            top_processes.sort(key=lambda x: x['cpu_percent'], reverse=True)
            total_top_cpu = sum(p['cpu_percent'] for p in top_processes[:3])

            if total_top_cpu >= 30.0:
                top_3_str = ""
                for p in top_processes[:3]:
                    top_3_str += f"\n- {p['name']} ({p['cpu_percent']}%)"
                alerts.append(f"[CPU Overload] Usage: {cpu_usage}%\nTop Processes:{top_3_str}")

        # 2. RAM Check
        ram = psutil.virtual_memory()
        if ram.percent > 90:
            alerts.append(f"[RAM High] Usage: {ram.percent}% (Free: {ram.available / 1024**3:.1f}GB)")

        # 3. GPU Check
        if self.ollama_monitor:
            gpu_status = self.ollama_monitor.get_gpu_status()
            temp = gpu_status.get('temp', 0)
            if temp > 80:
                alerts.append(f"[GPU Overheat] Temp: {temp}C")

        # 알림 전송
        if alerts:
            msg = "[System Health Alert]\n" + "\n".join(alerts)
            if self.messenger:
                self.messenger.send_message(msg)