"""하네스 훅 공용 유틸 (표준 라이브러리 전용)."""
import json
import os
import subprocess
import sys
from datetime import datetime, timedelta, timezone

KST = timezone(timedelta(hours=9))


def kst_now() -> datetime:
    override = os.environ.get("HARNESS_NOW_KST")  # 테스트용: 2026-10-02T10:00
    if override:
        try:
            return datetime.fromisoformat(override).replace(tzinfo=KST)
        except ValueError:
            pass
    return datetime.now(KST)


def market_state(now: datetime) -> str:
    """'휴장-주말' | '장전' | '장중' | '장후'. 공휴일은 판정하지 않는다(market_schedule 과 동일 한계)."""
    if now.weekday() >= 5:
        return "휴장-주말"
    hm = now.hour * 60 + now.minute
    if hm < 8 * 60 + 30:
        return "장전"
    if hm <= 15 * 60 + 40:
        return "장중"
    return "장후"


def read_stdin_json() -> dict:
    try:
        data = json.load(sys.stdin)
        return data if isinstance(data, dict) else {}
    except Exception:
        return {}


def project_dir(data: dict | None = None) -> str:
    return os.environ.get("CLAUDE_PROJECT_DIR") or (data or {}).get("cwd") or os.getcwd()


def git(args: list[str], cwd: str, timeout: float = 5.0) -> tuple[int, str]:
    try:
        p = subprocess.run(
            ["git", *args], cwd=cwd, capture_output=True, text=True, timeout=timeout
        )
        return p.returncode, p.stdout
    except Exception:
        return 1, ""