from datetime import datetime, timedelta
import pytz

OMAN_TZ = pytz.timezone("Asia/Muscat")


def utc_now_iso() -> str:
    return datetime.utcnow().replace(microsecond=0).isoformat() + "Z"


def muscat_now() -> datetime:
    return datetime.now(OMAN_TZ)


local_now = muscat_now


def local_date_str() -> str:
    return muscat_now().strftime("%Y-%m-%d")


def muscat_date_str() -> str:
    return local_date_str()


def business_day_for_close(now: datetime | None = None) -> str:
    if now is None:
        now = muscat_now()
    if now.hour < 6:
        return (now.date() - timedelta(days=1)).isoformat()
    return now.date().isoformat()


business_date_for_closing = business_day_for_close


def should_auto_close(now: datetime | None = None) -> bool:
    if now is None:
        now = muscat_now()
    return now.hour >= 6