#!/usr/bin/env python3
"""
Scan the local network to see what devices are active
"""

import subprocess
import sys
import ipaddress

def scan_network():
    """Scan the 192.168.1.x network"""
    print("Scanning 192.168.1.0/24 network...")
    
    # Use nmap if available, otherwise use ping
    try:
        result = subprocess.run(['nmap', '-sn', '192.168.1.0/24'], 
                              capture_output=True, text=True, timeout=30)
        if result.returncode == 0:
            print("Active hosts (nmap):")
            print(result.stdout)
        else:
            print("nmap failed, trying ping scan...")
            ping_scan()
    except FileNotFoundError:
        print("nmap not found, using ping scan...")
        ping_scan()

def ping_scan():
    """Ping scan 192.168.1.1-254"""
    active_hosts = []
    
    for i in range(1, 255):
        ip = f"192.168.1.{i}"
        try:
            result = subprocess.run(['ping', '-c', '1', '-W', '1000', ip], 
                                  capture_output=True, timeout=2)
            if result.returncode == 0:
                active_hosts.append(ip)
                print(f"✓ {ip} is active")
        except subprocess.TimeoutExpired:
            pass
        except Exception:
            pass
    
    print(f"\nFound {len(active_hosts)} active hosts:")
    for host in active_hosts:
        print(f"  {host}")

def check_arp():
    """Check ARP table for RP2040-ETH"""
    print("\nChecking ARP table for RP2040-ETH...")
    try:
        result = subprocess.run(['arp', '-a'], capture_output=True, text=True)
        lines = result.stdout.split('\n')
        rp2040_found = False
        
        for line in lines:
            if '192.168.1.20' in line or '192.168.1.201' in line:
                print(f"Found: {line}")
                rp2040_found = True
        
        if not rp2040_found:
            print("RP2040-ETH not found in ARP table")
            
    except Exception as e:
        print(f"ARP check failed: {e}")

if __name__ == "__main__":
    scan_network()
    check_arp()
    
    print("\nNext steps:")
    print("1. Check if 192.168.1.201 appears in the scan")
    print("2. Try: ping 192.168.1.201")
    print("3. Monitor serial output from RP2040-ETH for debug info")
    print("4. Check ethernet cable connection")