"""운영 상태 JSON 저장·로드."""

from __future__ import annotations

import json
from datetime import datetime
from pathlib import Path
from typing import Any


def _today_str() -> str:
    """오늘 날짜 문자열 (KST naive)."""
    return datetime.now().strftime("%Y-%m-%d")


def default_state(initial_cash_krw: float = 200_000.0) -> dict[str, Any]:
    """빈 운영 상태 dict."""
    return {
        "version": 1,
        "created_at": datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
        "last_run_at": None,
        "last_processed_datetime": None,
        "last_processed_bar_index": -1,
        "trades_today_date": _today_str(),
        "trades_today_count": 0,
        "portfolio": {
            "cash_krw": float(initial_cash_krw),
            "coin_qty": 0.0,
            "mode": "paper",
        },
        "trade_history": [],
    }


def load_state(path: Path, *, initial_cash_krw: float = 200_000.0) -> dict[str, Any]:
    """운영 상태를 로드한다. 없으면 기본값 생성."""
    if not path.exists():
        return default_state(initial_cash_krw)
    with path.open(encoding="utf-8") as fp:
        state = json.load(fp)
    if "portfolio" not in state:
        state["portfolio"] = default_state(initial_cash_krw)["portfolio"]
    return state


def save_state(path: Path, state: dict[str, Any]) -> Path:
    """운영 상태를 저장한다."""
    path.parent.mkdir(parents=True, exist_ok=True)
    with path.open("w", encoding="utf-8") as fp:
        json.dump(state, fp, ensure_ascii=False, indent=2)
    return path


def reset_daily_trade_count(state: dict[str, Any]) -> None:
    """날짜가 바뀌면 일일 체결 카운터를 초기화한다."""
    today = _today_str()
    if state.get("trades_today_date") != today:
        state["trades_today_date"] = today
        state["trades_today_count"] = 0