import time
import psutil


class MetricsCollector:
    """
    Lightweight node telemetry sampler.
    """

    def sample(self):

        return {
            "cpu": psutil.cpu_percent(interval=0.1),
            "memory": psutil.virtual_memory().percent,
            "load": psutil.getloadavg()[0] if hasattr(psutil, "getloadavg") else 0,
            "timestamp": time.time(),
        }