import evdev
import sys
import select

def main():
    print("--- Touch/Input Device Verifier ---")
    
    # List devices
    devices = [evdev.InputDevice(path) for path in evdev.list_devices()]
    
    if not devices:
        print("No input devices found! Check permissions (sudo?) or connections.")
        return

    target_device = None
    
    print(f"Found {len(devices)} devices:")
    for i, dev in enumerate(devices):
        print(f"  {i}: {dev.name} ({dev.phys}) - {dev.path}")
        # Look for the known QinHeng device
        if "CTP_CONTROL" in dev.name or "Touch" in dev.name:
            target_device = dev

    print("-" * 30)

    if target_device:
        print(f"Auto-selected likely touch device: {target_device.name}")
        dev = target_device
    else:
        # Fallback to manual selection or just pick the last one? 
        # For now, let's ask user or pick the first one if interactive
        try:
            sel = input(f"Select device ID (0-{len(devices)-1}): ")
            dev = devices[int(sel)]
        except:
             print("Invalid selection. Exiting.")
             return

    print(f"\nListening to: {dev.name} ({dev.path})")
    print("Touch the screen now! (Press Ctrl+C to stop)")
    print("-" * 30)

    try:
        # Read loop
        for event in dev.read_loop():
            if event.type == evdev.ecodes.EV_ABS:
                absevent = evdev.categorize(event)
                code = evdev.ecodes.bytype[absevent.event.type][absevent.event.code]
                if code == "ABS_X":
                     print(f"X: {absevent.event.value}", end="  ")
                elif code == "ABS_Y":
                     print(f"Y: {absevent.event.value}")
                     sys.stdout.flush()
            elif event.type == evdev.ecodes.EV_KEY and event.code == 330: # BTN_TOUCH
                 print(f"Touch {'DOWN' if event.value else 'UP'}")

    except KeyboardInterrupt:
        print("\nStopped.")
    except Exception as e:
        print(f"Error reading device: {e}")

if __name__ == "__main__":
    main()