"""전체 컨트롤러 시간 동기화 서비스"""

from concurrent.futures import ThreadPoolExecutor, as_completed
from datetime import datetime

from models.controller import Controller
from network.tcp_protocol import sync_time


def sync_all(
    controllers: list[Controller],
    max_workers: int = 8,
) -> list[tuple[Controller, bool, str]]:
    """선택된 컨트롤러에 일괄 시간 동기화.

    Returns: [(Controller, 성공여부, 메시지), ...]
    """
    targets = [c for c in controllers if c.selected]
    if not targets:
        return []

    dt = datetime.now()
    results: list[tuple[Controller, bool, str]] = []

    with ThreadPoolExecutor(max_workers=max_workers) as executor:
        future_map = {
            executor.submit(sync_time, c.ip, c.port, dt): c
            for c in targets
        }
        for future in as_completed(future_map):
            ctrl = future_map[future]
            try:
                ok, msg = future.result()
            except Exception as e:
                ok, msg = False, str(e)
            results.append((ctrl, ok, msg))

    return results