#!/usr/bin/env python3
"""
kis_trader/engine/live_sell_price.py — 실매 매도 현재가
================================================================================
판정 = WS 읽기 체인(메인 2초 실패→2차→3차). 한투 inquire_price 60초 캐시 금지.
1·2·3 전부 실패일 때만 키움 ka10007 REST 1회(쿨다운).
EOD = 마지막 WS → REST → 매수가 폴백.
"""
from __future__ import annotations

import threading
import time
from typing import Any, Callable, Optional, Tuple

from kis_trader.utils.env import get_env_float


_stale_rest_lock = threading.Lock()
_stale_rest_ts: dict = {}
_stale_log_ts: dict = {}
# WS/REST 성공 직후 가격 — REST 쿨다운(기본 30s) 동안 재사용 (매도 공백 방지)
_last_good_lock = threading.Lock()
_last_good_px: dict = {}


def _remember_last_good(code: str, px: float, src: str) -> None:
    code = str(code or "").strip()
    if not code or px <= 0:
        return
    with _last_good_lock:
        _last_good_px[code] = (float(px), str(src or "WS"), time.time())


def _last_good_price(code: str, max_age_sec: float) -> Tuple[float, str]:
    code = str(code or "").strip()
    if not code or max_age_sec <= 0:
        return 0.0, ""
    with _last_good_lock:
        rec = _last_good_px.get(code)
    if not rec:
        return 0.0, ""
    px, src, ts = rec
    if (time.time() - float(ts)) > float(max_age_sec):
        return 0.0, ""
    return float(px), str(src or "")


def _stck_prpr(raw: Any) -> float:
    if raw is None:
        return 0.0
    if isinstance(raw, dict):
        v = raw.get("stck_prpr") or raw.get("price") or 0
    else:
        v = raw
    try:
        return abs(float(str(v).replace(",", "")))
    except (TypeError, ValueError):
        return 0.0


def _ws_chain_price(ws: Any, code: str) -> Tuple[float, str]:
    """get_price 생략=2초 체인. 성공 시 (px, vendor)."""
    getter = getattr(ws, "get_price", None)
    if not callable(getter):
        return 0.0, ""
    try:
        wsd = getter(code)
    except TypeError:
        try:
            wsd = getter(code, max_age_sec=0)
        except Exception:
            wsd = None
    except Exception:
        wsd = None
    px = _stck_prpr(wsd)
    vendor = ""
    if isinstance(wsd, dict):
        vendor = str(wsd.get("_feed_vendor") or "").strip()
    if not vendor:
        lab = getattr(ws, "get_tick_feed_label", None)
        if callable(lab):
            try:
                vendor = str(lab(code) or "").strip()
            except Exception:
                vendor = ""
    if px > 0:
        return px, vendor or "WS"
    return 0.0, ""


def _quote_packet_raw(wsd: Any) -> str:
    """체결시각 원문. FID20 동결 RAM 을 매도 last-RAM 으로 쓰지 않기 위함."""
    if not isinstance(wsd, dict):
        return ""
    for k in (
        "kis_cntg_hour_raw", "chetime", "tick_time", "kiwoom_fid20",
        "stck_cntg_hour",
    ):
        v = str(wsd.get(k) or "").strip()
        if v:
            return v
    return ""


def _last_ram_sell_ok(wsd: Any, max_age_sec: float) -> bool:
    """마지막 RAM: wall 나이·패킷 나이 둘 다 max 이내. 동결 FID20 거부."""
    if max_age_sec <= 0 or not isinstance(wsd, dict):
        return False
    try:
        wall = float(wsd.get("_age_ms") or 0) / 1000.0
    except (TypeError, ValueError):
        wall = 0.0
    if wall > float(max_age_sec):
        return False
    raw = _quote_packet_raw(wsd)
    if not raw:
        return True
    try:
        from kis_trader.engine.feed_fallback import packet_lag_seconds
        lag = packet_lag_seconds(raw)
    except Exception:
        return True
    if lag is None:
        return True
    return float(lag) <= float(max_age_sec)


def _ws_last_and_age(ws: Any, code: str) -> Tuple[float, float]:
    """마지막 RAM 체결가 + 나이(초). 캐시 없으면 (0, inf). EOD 전용."""
    getter = getattr(ws, "get_price", None)
    if not callable(getter):
        return 0.0, float("inf")
    wsd = None
    try:
        wsd = getter(code, max_age_sec=None)
    except TypeError:
        try:
            wsd = getter(code)
        except Exception:
            wsd = None
    except Exception:
        wsd = None
    px = _stck_prpr(wsd)
    age = float("inf")
    if isinstance(wsd, dict):
        try:
            age = float(wsd.get("_age_ms") or 0) / 1000.0
        except (TypeError, ValueError):
            age = 0.0 if px > 0 else float("inf")
    elif px > 0:
        age = 0.0
    return px, age


def _kiwoom_rest_once(ws: Any, code: str) -> float:
    fn = getattr(ws, "inquire_kiwoom_rest_price", None)
    if not callable(fn):
        return 0.0
    try:
        return abs(float(fn(code) or 0.0))
    except (TypeError, ValueError):
        return 0.0
    except Exception:
        return 0.0


def _stale_rest_allowed(code: str, cooldown_sec: float) -> bool:
    now = time.time()
    with _stale_rest_lock:
        last = float(_stale_rest_ts.get(code, 0.0) or 0.0)
        if last > 0.0 and (now - last) < float(cooldown_sec):
            return False
        _stale_rest_ts[code] = now
        return True


def _log_throttled(logger: Any, key: str, msg: str, *args: Any) -> None:
    if logger is None:
        return
    now = time.time()
    last = float(_stale_log_ts.get(key, 0.0) or 0.0)
    if now - last < 60.0:
        return
    _stale_log_ts[key] = now
    try:
        logger.info(msg, *args)
    except Exception:
        pass


def resolve_live_sell_price(
    ws: Any,
    inquire_price: Optional[Callable],
    code: str,
    *,
    is_eod: bool = False,
    fallback_price: float = 0.0,
    logger: Any = None,
) -> Tuple[float, str]:
    """
    실매 매도용 현재가.

    Returns:
        (price, src)  src = kiwoom|kis|ls|kiwoom_rest|EOD_FALLBACK|""
    inquire_price 인자는 호환용으로 받지만 한투 60초 캐시는 쓰지 않음.
    """
    code = str(code or "").strip()
    fb = float(fallback_price or 0.0)
    stale_sec = float(get_env_float("SELL_WS_STALE_REST_SEC", 1.0) or 0.0)
    cooldown = float(get_env_float("SELL_WS_STALE_REST_COOLDOWN_SEC", 30.0) or 0.0)
    if cooldown < 1.0:
        cooldown = 1.0
    _ = inquire_price  # 한투 경로 사용 금지 (시그니처 유지)

    if is_eod:
        ws_px, _age = _ws_last_and_age(ws, code)
        if ws_px > 0:
            _remember_last_good(code, ws_px, "WS")
            return ws_px, "WS"
        if stale_sec > 0 and _stale_rest_allowed(code, cooldown):
            rest_px = _kiwoom_rest_once(ws, code)
            if rest_px > 0:
                return rest_px, "kiwoom_rest"
        if fb > 0:
            _log_throttled(
                logger,
                "eod_fb:" + code,
                "📌 [EOD가격] %s WS·키움REST 없음 → 매수가 폴백 %.0f (시장가 청산)",
                code,
                fb,
            )
            return fb, "EOD_FALLBACK"
        return 0.0, ""

    chain_px, vendor = _ws_chain_price(ws, code)
    if chain_px > 0:
        _remember_last_good(code, chain_px, vendor or "WS")
        return chain_px, vendor or "WS"

    last_max = float(get_env_float("SELL_WS_LAST_RAM_MAX_AGE_SEC", 30.0) or 0.0)
    if last_max > 0:
        last_px, last_age = _ws_last_and_age(ws, code)
        getter = getattr(ws, "get_price", None)
        wsd_last = None
        if callable(getter):
            try:
                wsd_last = getter(code, max_age_sec=None)
            except TypeError:
                wsd_last = None
            except Exception:
                wsd_last = None
        if last_px > 0 and _last_ram_sell_ok(wsd_last, last_max):
            lab = ""
            if isinstance(wsd_last, dict):
                lab = str(wsd_last.get("_feed_vendor") or "").strip()
            _remember_last_good(code, last_px, lab or "WS_last")
            _log_throttled(
                logger,
                "last_ram:" + code,
                "📌 [매도시세] %s 3초체인 실패 → last-RAM %.0f (age=%.1fs)",
                code,
                last_px,
                last_age if last_age != float("inf") else -1.0,
            )
            return last_px, "WS_last"

    cached_px, cached_src = _last_good_price(code, cooldown)
    if cached_px > 0:
        _log_throttled(
            logger,
            "last_good:" + code,
            "📌 [매도시세] %s WS체인 실패 → 직전가 유지(%s) %.0f",
            code,
            cached_src,
            cached_px,
        )
        return cached_px, cached_src + "_cached"

    if stale_sec > 0 and _stale_rest_allowed(code, cooldown):
        rest_px = _kiwoom_rest_once(ws, code)
        if rest_px > 0:
            _remember_last_good(code, rest_px, "kiwoom_rest")
            _log_throttled(
                logger,
                "stale_rest:" + code,
                "📌 [매도시세] %s 1·2·3차 실패 → 키움 REST(ka10007) %.0f",
                code,
                rest_px,
            )
            lab = getattr(ws, "_remember_feed_read", None)
            if callable(lab):
                try:
                    lab("tick", code, "kiwoom_rest")
                except Exception:
                    pass
            return rest_px, "kiwoom_rest"
        _log_throttled(
            logger,
            "stale_keep:" + code,
            "📌 [매도시세] %s 키움 REST 실패·쿨다운 — 가격 없음",
            code,
        )
    return 0.0, ""