#!/usr/bin/env python3
"""Controller desktop click stability over local IPC; no SteamVR client."""
import argparse
import json
import math
import socket

def request(command):
    with socket.socket(socket.AF_UNIX, socket.SOCK_DGRAM) as client:
        client.bind(''); client.settimeout(2)
        client.sendto(command.encode(), '\0ft_screens')
        response=client.recv(8192).decode()
    if response.startswith('error'): raise RuntimeError(response)
    return response

def main():
    parser=argparse.ArgumentParser(description=__doc__)
    sub=parser.add_subparsers(dest='command', required=True)
    sub.add_parser('status')
    sub.add_parser('threshold').add_argument('pixels', type=float)
    args=parser.parse_args()
    try:
        if args.command == 'threshold':
            if not math.isfinite(args.pixels) or not 0 <= args.pixels <= 64:
                raise ValueError('Threshold must be 0–64 logical pixels; 0 disables stabilization')
            if request(f'controller-click {args.pixels:g}') != 'ok': raise RuntimeError('Threshold rejected')
        print(json.dumps(json.loads(request('controller-click?')), indent=2))
    except (OSError, ValueError, RuntimeError) as error: parser.exit(1, str(error)+'\n')
if __name__ == '__main__': main()