#!/usr/bin/env python3
"""Select an available iPhone instead of depending on a runner-specific device name."""
import json
import re
import subprocess

devices = json.loads(subprocess.check_output(["xcrun", "simctl", "list", "devices", "available", "--json"]))
phones = []
for runtime, entries in devices["devices"].items():
    match = re.search(r"\.iOS-(\d+)-(\d+)", runtime)
    if not match:
        continue
    version = tuple(map(int, match.groups()))
    if version < (18, 4):
        continue
    phones.extend((version, device) for device in entries
                  if device.get("isAvailable") and device["name"].startswith("iPhone"))
phones.sort(key=lambda entry: entry[0], reverse=True)
if not phones:
    raise SystemExit("No available iPhone simulator; install an iOS simulator runtime in Xcode.")
print(phones[0][1]["udid"])