sys_monitor.py

import psutil
import time
import os
from datetime import datetime

# Log file name
LOG_FILE = "monitor_alerts.log"

def clear_screen():
    # Clears the terminal screen (works for Windows/Mac/Linux)
    os.system('cls' if os.name == 'nt' else 'clear')

def log_alert(message):
    """Writes a message with a timestamp to the log file."""
    timestamp = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
    with open(LOG_FILE, "a") as f:
        f.write(f"[{timestamp}] {message}\n")

def run_monitor():
    print(f"--- System Surveillance Started (Ctrl+C to stop) ---")
    print(f"--- Logging alerts to: {LOG_FILE} ---")
    try:
        while True:
            # 1. Get CPU usage (interval=1 means it averages over 1 second)
            cpu_usage = psutil.cpu_percent(interval=1)
            
            # 2. Get RAM usage
            memory = psutil.virtual_memory()
            
            # 3. Get Disk usage
            disk = psutil.disk_usage('/')

            clear_screen()
            print(f"--- REAL-TIME SYSTEM MONITOR ---")
            print(f"CPU Usage:    [{'#' * int(cpu_usage/5)}{' ' * (20-int(cpu_usage/5))}] {cpu_usage}%")
            print(f"RAM Usage:    {memory.percent}% ({memory.used // (1024**2)}MB / {memory.total // (1024**2)}MB)")
            print(f"Disk Space:   {disk.percent}% used")
            
            # SURVEILLANCE LOGIC: Log alerts for high usage
            if cpu_usage > 80:
                msg = f"CRITICAL: High CPU usage detected: {cpu_usage}%"
                print(f"\n[!] {msg}")
                log_alert(msg)
                
            if memory.percent > 90:
                msg = f"CRITICAL: High RAM usage detected: {memory.percent}%"
                print(f"\n[!] {msg}")
                log_alert(msg)
            
    except KeyboardInterrupt:
        print("\nMonitoring stopped by user.")

if __name__ == "__main__":
    run_monitor()