# Copyright (c) 2025-2026 马建军. All rights reserved.
# 专有软件 — 未经授权禁止复制、传播、转售。
# 严禁用于：带单/代客理财、向他人推荐期货品种或买卖建议、融资配资等业务。
# 详见 LICENSE.zh-CN.txt 与 docs/软件购买与使用协议.md

"""交易上下文：设置读取、资金、模式。"""
from __future__ import annotations

from typing import Callable, Optional

TRADING_MODE_SIM = "simulation"  # SimNow CTP
TRADING_MODE_LIVE = "live"       # 期货公司 CTP


def get_trading_mode(get_setting: Callable[[str, str], str]) -> str:
    m = (get_setting("trading_mode", TRADING_MODE_SIM) or TRADING_MODE_SIM).strip().lower()
    return m if m in (TRADING_MODE_SIM, TRADING_MODE_LIVE) else TRADING_MODE_SIM


def get_sizing_mode(get_setting: Callable[[str, str], str]) -> str:
    from modules.trading.position_sizing import normalize_sizing_mode
    return normalize_sizing_mode(get_setting("position_sizing_mode", "fixed"))


def get_fixed_lots(get_setting: Callable[[str, str], str]) -> int:
    try:
        return max(1, int(float(get_setting("fixed_lots", "1") or 1)))
    except (TypeError, ValueError):
        return 1


def get_fixed_amount(get_setting: Callable[[str, str], str]) -> float:
    try:
        return max(1.0, float(get_setting("fixed_amount", "5000") or 5000))
    except (TypeError, ValueError):
        return 5000.0


def get_risk_percent(get_setting: Callable[[str, str], str]) -> float:
    try:
        return max(0.1, float(get_setting("risk_percent", "1") or 1))
    except (TypeError, ValueError):
        return 1.0


def get_max_margin_pct(get_setting: Callable[[str, str], str]) -> float:
    """单笔/总仓位保证金占权益上限（%），默认 30。"""
    try:
        return max(1.0, min(100.0, float(get_setting("max_margin_pct", "30") or 30)))
    except (TypeError, ValueError):
        return 30.0


def get_roll_max_margin_pct(get_setting: Callable[[str, str], str]) -> float:
    """滚仓后总保证金占权益上限（%），默认 50。"""
    try:
        return max(1.0, min(100.0, float(get_setting("roll_max_margin_pct", "50") or 50)))
    except (TypeError, ValueError):
        return 50.0


def get_trailing_be_tick_buffer(get_setting: Callable[[str, str], str]) -> int:
    """移动保本：止损移至开仓价 ± N 个最小变动价位（默认 2）。"""
    try:
        return max(1, min(20, int(float(get_setting("trailing_be_tick_buffer", "2") or 2))))
    except (TypeError, ValueError):
        return 2


def get_pending_order_timeout_min(get_setting: Callable[[str, str], str]) -> int:
    """开仓限价委托未成交自动撤单时间（分钟），默认 5。"""
    try:
        return max(1, min(60, int(float(get_setting("pending_order_timeout_min", "5") or 5))))
    except (TypeError, ValueError):
        return 5


def get_pending_order_timeout_sec(get_setting: Callable[[str, str], str]) -> int:
    return get_pending_order_timeout_min(get_setting) * 60


def _cached_ctp_account(mode: str) -> dict[str, float]:
    """CTP 未连接时，用最近一次 worker/持仓快照里的账户权益。"""
    import json

    try:
        from modules.trading.position_stream import position_hub

        snap = position_hub.get_snapshot() or {}
        cap = float(snap.get("capital") or 0)
        avail = snap.get("account_available")
        if cap > 0 or avail is not None:
            out: dict[str, float] = {}
            if cap > 0:
                out["balance"] = cap
            if avail is not None:
                out["available"] = float(avail)
            return out
    except Exception:
        pass
    try:
        from modules.core.db_conn import connect_db

        conn = connect_db()
        try:
            row = conn.execute(
                "SELECT value FROM ctp_worker_snapshots WHERE key='account' LIMIT 1"
            ).fetchone()
        finally:
            conn.close()
        if row and row["value"]:
            acc = json.loads(row["value"])
            balance = float(acc.get("balance") or 0)
            available = acc.get("available")
            out: dict[str, float] = {}
            if balance > 0:
                out["balance"] = balance
            if available is not None:
                out["available"] = float(available)
            return out
    except Exception:
        pass
    del mode
    return {}


def _ctp_status_from_snapshot(mode: str) -> Optional[dict]:
    """读持仓快照中的 CTP 状态，避免页面渲染同步 IPC。"""
    try:
        from modules.trading.position_stream import position_hub

        snap = position_hub.get_snapshot() or {}
        st = snap.get("ctp_status")
        if isinstance(st, dict) and st:
            return st
    except Exception:
        pass
    del mode
    return None


def get_account_capital(conn, get_setting: Callable[[str, str], str]) -> float:
    """优先读持仓/Worker 快照权益；无快照时才同步问 CTP。"""
    del conn
    mode = get_trading_mode(get_setting)
    cached = _cached_ctp_account(mode)
    balance = float(cached.get("balance") or 0)
    if balance > 0:
        return balance
    try:
        from modules.ctp.vnpy_bridge import ctp_status, get_ctp_balance

        st = ctp_status(mode)
        if st.get("connected"):
            bal = get_ctp_balance(mode)
            if bal and bal > 0:
                return float(bal)
    except Exception:
        pass
    try:
        return float(get_setting("live_capital", "0") or 0)
    except (TypeError, ValueError):
        return 0.0


def get_recommend_capital(conn, get_setting: Callable[[str, str], str]) -> float:
    """可开仓品种表用权益：已连接 CTP 用柜台权益，未连接固定 10 万。"""
    from modules.trading.product_recommend import DISCONNECTED_RECOMMEND_CAPITAL

    if is_ctp_connected(get_setting):
        return get_account_capital(conn, get_setting)
    return float(DISCONNECTED_RECOMMEND_CAPITAL)


def is_ctp_connected(get_setting: Callable[[str, str], str]) -> bool:
    """当前交易模式（SimNow / 实盘）是否已连接 CTP。"""
    mode = get_trading_mode(get_setting)
    st = _ctp_status_from_snapshot(mode)
    if st is not None:
        return bool(st.get("connected"))
    try:
        from modules.ctp.vnpy_bridge import ctp_status

        return bool(ctp_status(mode).get("connected"))
    except Exception:
        return False


def trading_mode_label(get_setting: Callable[[str, str], str]) -> str:
    return "SimNow" if get_trading_mode(get_setting) == TRADING_MODE_SIM else "期货公司实盘"