"""
3단계: monitor_rules 발화 시 빗썸 실주문 (가드·로그).
"""

from __future__ import annotations

import json
import time
from datetime import date, datetime
from pathlib import Path
from typing import Any

from config import (
    COIN_NAME,
    LIVE_COOLDOWN_MIN,
    LIVE_DAILY_KRW_MAX,
    LIVE_DAILY_LOSS_LIMIT_KRW,
    LIVE_MAX_TRADES_PER_DAY,
    LIVE_ORDER_KRW,
    LIVE_TRADING_ENABLED,
    SYMBOL,
)
from deepcoin.matching.live_eval import evaluate_live_rules
from deepcoin.matching.load_rules import load_monitor_rules
from deepcoin.ops.alert_message import build_rule_alert_message
from deepcoin.ops.monitor import Monitor
from deepcoin.paths import LIVE_TRADES_LOG


class LiveTrader(Monitor):
    """
    규칙 발화 시 실거래 실행. LIVE_TRADING_ENABLED=0 이면 주문 없음(드라이런 로그만).
    """

    def __init__(self) -> None:
        """Monitor 초기화, 일별 카운터 비움."""
        super().__init__(cooldown_file=None)
        self._rule_last_unix: dict[str, float] = {}
        self._day: str = ""
        self._day_spent_krw: float = 0.0
        self._day_trades: int = 0
        self._day_pnl_krw: float = 0.0

    def _reset_day_if_needed(self) -> None:
        """날짜 변경 시 일별 한도 카운터 초기화."""
        today = date.today().isoformat()
        if today != self._day:
            self._day = today
            self._day_spent_krw = 0.0
            self._day_trades = 0
            self._day_pnl_krw = 0.0

    def _append_log(self, record: dict[str, Any]) -> None:
        """
        live_trades.jsonl에 한 줄 append.

        Args:
            record: 로그 dict.
        """
        LIVE_TRADES_LOG.parent.mkdir(parents=True, exist_ok=True)
        with LIVE_TRADES_LOG.open("a", encoding="utf-8") as f:
            f.write(json.dumps(record, ensure_ascii=False) + "\n")

    def _can_trade(self, rule_id: str) -> tuple[bool, str]:
        """
        일·쿨다운·손실 한도 검사.

        Args:
            rule_id: 규칙 ID.

        Returns:
            (허용 여부, 사유).
        """
        self._reset_day_if_needed()
        if self._day_trades >= LIVE_MAX_TRADES_PER_DAY:
            return False, "일 최대 거래 수 초과"
        if self._day_spent_krw + LIVE_ORDER_KRW > LIVE_DAILY_KRW_MAX:
            return False, "일 주문 한도 초과"
        if self._day_pnl_krw <= -abs(LIVE_DAILY_LOSS_LIMIT_KRW):
            return False, "일 손실 한도 초과"
        last = self._rule_last_unix.get(rule_id, 0.0)
        if time.time() - last < LIVE_COOLDOWN_MIN * 60:
            return False, f"규칙 쿨다운({LIVE_COOLDOWN_MIN}분)"
        return True, ""

    def _execute_order(self, hit: dict[str, Any]) -> dict[str, Any]:
        """
        매수·매도 주문 실행 또는 드라이런.

        Args:
            hit: evaluate_live_rules 항목.

        Returns:
            로그용 결과 dict.
        """
        side = hit["side"]
        price = float(hit["close"])
        amount_krw = float(LIVE_ORDER_KRW)
        record: dict[str, Any] = {
            "ts": datetime.now().isoformat(timespec="seconds"),
            "rule_id": hit["rule_id"],
            "side": side,
            "signal_dt": hit["dt"],
            "price": price,
            "amount_krw": amount_krw,
            "live_enabled": LIVE_TRADING_ENABLED,
            "ok": False,
            "message": "",
        }

        if not LIVE_TRADING_ENABLED:
            record["message"] = "dry_run (LIVE_TRADING_ENABLED=0)"
            record["ok"] = True
            return record

        try:
            if side == "buy":
                ok = self.buyCoinMarket(SYMBOL, int(amount_krw), count=None)
                record["ok"] = bool(ok)
                record["message"] = "buyCoinMarket" if ok else "buy failed"
            elif side == "sell":
                bal = self.load_balances_dict().get(SYMBOL, {})
                qty = float(bal.get("balance") or 0)
                if qty <= 0:
                    record["message"] = "보유 없음"
                else:
                    ok = self.sellCoinMarket(SYMBOL, int(price), qty)
                    record["ok"] = bool(ok)
                    record["message"] = f"sell qty={qty}" if ok else "sell failed"
            else:
                record["message"] = f"unknown side {side}"
        except Exception as exc:
            record["message"] = str(exc)

        if record["ok"]:
            self._day_spent_krw += amount_krw
            self._day_trades += 1
            self._rule_last_unix[hit["rule_id"]] = time.time()
        return record

    def run_once(self) -> None:
        """1회: 규칙 평가 → (허용 시) 주문 → 텔레그램."""
        rules = load_monitor_rules()
        print(
            f"[06] {datetime.now():%Y-%m-%d %H:%M:%S} "
            f"{COIN_NAME} live={'ON' if LIVE_TRADING_ENABLED else 'OFF'} "
            f"rules={len(rules)}"
        )
        if not rules:
            print("  monitor_rules 없음")
            return

        fired = evaluate_live_rules(rules)
        balances = None
        try:
            balances = self.load_balances_dict()
        except Exception:
            pass

        if not fired:
            print("  발화 없음")
            return

        for hit in fired:
            rid = hit["rule_id"]
            ok, reason = self._can_trade(rid)
            print(f"  [{hit['side']}] {rid} @ {hit['dt']}")
            if not ok:
                print(f"    skip: {reason}")
                continue
            log = self._execute_order(hit)
            self._append_log(log)
            print(f"    order: {log['message']} ok={log['ok']}")
            msg = build_rule_alert_message(hit, balances)
            if log["ok"]:
                msg += f"\n[체결] {log['message']}"
            else:
                msg += f"\n[실패] {log['message']}"
            self._send_coin_msg(msg)

    def run_loop(self, sleep_sec: int) -> None:
        """
        상시 루프.

        Args:
            sleep_sec: 대기 초.
        """
        print(f"[06] 실거래 루프 시작 · sleep={sleep_sec}s")
        while True:
            self.run_once()
            time.sleep(sleep_sec)