"""顺势加仓 UI：滚仓腿合并均价与止盈盈利展示（实例页 + 中控）。"""
from __future__ import annotations

from typing import Any, Callable, Optional

from flask import Flask

FILLED_LEG_STATUSES = frozenset({"filled", "done", "complete"})


def reward_at_tp_usdt(
    direction: str,
    avg_entry: float,
    take_profit: float,
    qty: float,
    *,
    contract_size: float = 1.0,
) -> Optional[float]:
    """与 strategy_roll_lib.preview_roll 一致：线性合约 U 本位盈利。"""
    try:
        avg = float(avg_entry)
        tp = float(take_profit)
        q = float(qty)
        cs = float(contract_size or 1.0)
    except (TypeError, ValueError):
        return None
    if avg <= 0 or tp <= 0 or q <= 0:
        return None
    direction = (direction or "long").strip().lower()
    if direction == "short":
        return (avg - tp) * q * cs
    return (tp - avg) * q * cs


def leg_fill_price(leg: dict) -> Optional[float]:
    if not isinstance(leg, dict):
        return None
    for key in ("fill_price", "limit_price"):
        try:
            v = float(leg.get(key) or 0)
            if v > 0:
                return v
        except (TypeError, ValueError):
            continue
    return None


def leg_is_filled(leg: dict) -> bool:
    st = str(leg.get("status") or "").strip().lower()
    return st in FILLED_LEG_STATUSES


def infer_initial_position(
    qty_live: float,
    entry_live: float,
    filled_legs: list[dict],
    *,
    monitor: dict | None = None,
) -> tuple[Optional[float], Optional[float]]:
    """由当前持仓与各腿成交价反推首仓张数/均价。"""
    try:
        qty_live = float(qty_live)
        entry_live = float(entry_live)
    except (TypeError, ValueError):
        qty_live = entry_live = 0.0
    legs = [
        lg
        for lg in filled_legs or []
        if isinstance(lg, dict) and leg_is_filled(lg) and leg_fill_price(lg) and float(lg.get("amount") or 0) > 0
    ]
    add_sum = sum(float(lg.get("amount") or 0) for lg in legs)
    leg_notional = sum(float(lg.get("amount") or 0) * float(leg_fill_price(lg) or 0) for lg in legs)
    q0 = qty_live - add_sum
    if q0 > 1e-12 and entry_live > 0 and qty_live > 0:
        e0 = (entry_live * qty_live - leg_notional) / q0
        if e0 > 0:
            return q0, e0
    mon = monitor if isinstance(monitor, dict) else {}
    try:
        trig = float(mon.get("trigger_price") or 0)
    except (TypeError, ValueError):
        trig = 0.0
    try:
        mon_amt = float(mon.get("order_amount") or mon.get("amount") or 0)
    except (TypeError, ValueError):
        mon_amt = 0.0
    if trig > 0:
        q_base = q0 if q0 > 1e-12 else (mon_amt if mon_amt > 0 else max(qty_live - add_sum, 0))
        if q_base > 0:
            return q_base, trig
    return None, None


def compute_roll_chain_metrics(
    group: dict,
    legs: list[dict],
    *,
    qty_live: Optional[float] = None,
    entry_live: Optional[float] = None,
    monitor: dict | None = None,
    contract_size: float = 1.0,
) -> tuple[dict[Any, dict], dict]:
    """
    返回 (leg_metrics_by_id, group_metrics)。
    leg_metrics: leg id -> {avg_entry_after, reward_at_tp_usdt}
    group_metrics: 最后一腿后的 {avg_entry, reward_at_tp_usdt}
    """
    per_leg: dict[Any, dict] = {}
    group_out: dict[str, Any] = {"avg_entry": None, "reward_at_tp_usdt": None}
    if not isinstance(group, dict):
        return per_leg, group_out
    direction = (group.get("direction") or "long").strip().lower()
    try:
        tp = float(group.get("initial_take_profit") or 0)
    except (TypeError, ValueError):
        tp = 0.0
    sorted_legs = sorted(
        [lg for lg in legs or [] if isinstance(lg, dict)],
        key=lambda x: int(x.get("leg_index") or 0),
    )
    filled = [lg for lg in sorted_legs if leg_is_filled(lg)]
    q0 = e0 = None
    if qty_live is not None and entry_live is not None:
        q0, e0 = infer_initial_position(float(qty_live), float(entry_live), filled, monitor=monitor)
    if q0 is None or e0 is None:
        return per_leg, group_out
    qty = float(q0)
    avg = float(e0)
    if tp > 0:
        group_out["avg_entry"] = avg
        group_out["reward_at_tp_usdt"] = reward_at_tp_usdt(
            direction, avg, tp, qty, contract_size=contract_size
        )
    for leg in sorted_legs:
        if not leg_is_filled(leg):
            continue
        try:
            amt = float(leg.get("amount") or 0)
        except (TypeError, ValueError):
            continue
        px = leg_fill_price(leg)
        if not px or amt <= 0:
            continue
        prev_qty = qty
        qty = prev_qty + amt
        avg = (prev_qty * avg + amt * px) / qty
        reward = reward_at_tp_usdt(direction, avg, tp, qty, contract_size=contract_size) if tp > 0 else None
        lid = leg.get("id")
        if lid is None:
            lid = f"{group.get('id')}|{leg.get('leg_index')}"
        per_leg[lid] = {
            "avg_entry_after": round(avg, 10),
            "reward_at_tp_usdt": round(reward, 4) if reward is not None else None,
        }
        group_out["avg_entry"] = round(avg, 10)
        group_out["reward_at_tp_usdt"] = round(reward, 4) if reward is not None else None
    return per_leg, group_out


def _row_to_dict(row) -> dict:
    if row is None:
        return {}
    try:
        return dict(row)
    except Exception:
        return {}


def _resolve_roll_live(cfg: dict, group: dict, monitor: dict | None) -> tuple[Optional[float], Optional[float], float]:
    """读取交易所持仓张数、均价、contract_size。"""
    m = cfg.get("app_module")
    ex_sym = group.get("exchange_symbol")
    sym = group.get("symbol") or ""
    direction = (group.get("direction") or "long").strip().lower()
    if not ex_sym and m is not None:
        norm = getattr(m, "normalize_exchange_symbol", None)
        if callable(norm):
            try:
                ex_sym = norm(sym)
            except Exception:
                ex_sym = sym
    cs = 1.0
    get_cs = cfg.get("get_contract_size")
    if not callable(get_cs) and m is not None:
        get_cs = getattr(m, "get_contract_size", None)
    if callable(get_cs):
        try:
            cs = float(get_cs(ex_sym or sym) or 1.0)
        except Exception:
            cs = 1.0
    get_pos = cfg.get("get_position")
    if not callable(get_pos):
        return None, None, cs
    try:
        pos = get_pos(ex_sym or sym, direction) or {}
        qty = float(pos.get("contracts") or 0)
        entry = float(pos.get("entry_price") or 0)
        if qty > 0 and entry > 0:
            return qty, entry, cs
    except Exception:
        pass
    metrics_fn = getattr(m, "get_live_position_exchange_metrics", None) if m else None
    if callable(metrics_fn):
        try:
            met = metrics_fn(ex_sym or sym, direction)
            if isinstance(met, dict):
                qty = float(met.get("contracts") or met.get("size") or 0)
                entry = float(met.get("entry_price") or 0)
                if qty > 0 and entry > 0:
                    return qty, entry, cs
        except Exception:
            pass
    if monitor:
        try:
            trig = float(monitor.get("trigger_price") or 0)
            amt = float(monitor.get("order_amount") or monitor.get("amount") or 0)
            if trig > 0 and amt > 0:
                return amt, trig, cs
        except (TypeError, ValueError):
            pass
    return None, None, cs


def enrich_roll_page_data(conn, page_data: dict, cfg: dict | None) -> dict:
    """为 roll_groups / roll_legs 附加 avg_entry、reward_at_tp 展示字段。"""
    if not isinstance(page_data, dict) or not cfg:
        return page_data
    groups = list(page_data.get("roll_groups") or [])
    legs = list(page_data.get("roll_legs") or [])
    if not groups:
        return page_data
    monitors_by_id: dict[int, dict] = {}
    try:
        for row in conn.execute("SELECT * FROM order_monitors WHERE status='active'").fetchall():
            od = _row_to_dict(row)
            mid = od.get("id")
            if mid is not None:
                monitors_by_id[int(mid)] = od
    except Exception:
        pass
    legs_by_gid: dict[int, list] = {}
    for leg in legs:
        if not isinstance(leg, dict):
            continue
        try:
            gid = int(leg.get("roll_group_id"))
        except (TypeError, ValueError):
            continue
        legs_by_gid.setdefault(gid, []).append(leg)
    price_fmt = cfg.get("price_fmt")
    for g in groups:
        if not isinstance(g, dict) or g.get("id") is None:
            continue
        gid = int(g["id"])
        mon = monitors_by_id.get(int(g.get("order_monitor_id") or 0))
        qty, entry, cs = _resolve_roll_live(cfg, g, mon)
        per_leg, group_metrics = compute_roll_chain_metrics(
            g,
            legs_by_gid.get(gid, []),
            qty_live=qty,
            entry_live=entry,
            monitor=mon,
            contract_size=cs,
        )
        g["avg_entry"] = group_metrics.get("avg_entry")
        g["reward_at_tp_usdt"] = group_metrics.get("reward_at_tp_usdt")
        if callable(price_fmt) and g.get("avg_entry") is not None:
            try:
                g["avg_entry_display"] = price_fmt(g.get("symbol"), g["avg_entry"])
            except Exception:
                pass
        for leg in legs_by_gid.get(gid, []):
            lid = leg.get("id")
            if lid is None:
                lid = f"{gid}|{leg.get('leg_index')}"
            metrics = per_leg.get(lid) or per_leg.get(leg.get("id"))
            if not metrics:
                continue
            leg["avg_entry_after"] = metrics.get("avg_entry_after")
            leg["reward_at_tp_usdt"] = metrics.get("reward_at_tp_usdt")
            if callable(price_fmt) and leg.get("avg_entry_after") is not None:
                try:
                    leg["avg_entry_display"] = price_fmt(g.get("symbol"), leg["avg_entry_after"])
                except Exception:
                    pass
    page_data["roll_groups"] = groups
    page_data["roll_legs"] = legs
    return page_data


def enrich_roll_groups_for_hub(rolls: list[dict], conn, cfg: dict | None) -> list[dict]:
    """中控 monitor API：每组附带当前均价、止盈盈利与最近滚仓腿。"""
    if not rolls or not cfg:
        return rolls
    out = []
    gid_list = []
    for g in rolls:
        if isinstance(g, dict) and g.get("id") is not None:
            try:
                gid_list.append(int(g["id"]))
            except (TypeError, ValueError):
                pass
    legs_by_gid: dict[int, list] = {gid: [] for gid in gid_list}
    if gid_list:
        placeholders = ",".join("?" for _ in gid_list)
        try:
            rows = conn.execute(
                f"SELECT * FROM roll_legs WHERE roll_group_id IN ({placeholders}) ORDER BY id DESC",
                gid_list,
            ).fetchall()
            for row in rows:
                leg = _row_to_dict(row)
                try:
                    legs_by_gid[int(leg.get("roll_group_id"))].append(leg)
                except (TypeError, ValueError):
                    pass
        except Exception:
            pass
    monitors_by_id: dict[int, dict] = {}
    try:
        for row in conn.execute("SELECT * FROM order_monitors WHERE status='active'").fetchall():
            od = _row_to_dict(row)
            if od.get("id") is not None:
                monitors_by_id[int(od["id"])] = od
    except Exception:
        pass
    price_fmt = cfg.get("price_fmt")
    for g in rolls:
        if not isinstance(g, dict):
            continue
        gd = dict(g)
        try:
            gid = int(gd.get("id"))
        except (TypeError, ValueError):
            out.append(gd)
            continue
        mon = monitors_by_id.get(int(gd.get("order_monitor_id") or 0))
        group_legs = legs_by_gid.get(gid, [])
        qty, entry, cs = _resolve_roll_live(cfg, gd, mon)
        per_leg, group_metrics = compute_roll_chain_metrics(
            gd,
            group_legs,
            qty_live=qty,
            entry_live=entry,
            monitor=mon,
            contract_size=cs,
        )
        gd.update(group_metrics)
        if callable(price_fmt) and gd.get("avg_entry") is not None:
            try:
                gd["avg_entry_display"] = price_fmt(gd.get("symbol"), gd["avg_entry"])
            except Exception:
                pass
        recent = []
        for leg in sorted(group_legs, key=lambda x: int(x.get("leg_index") or 0), reverse=True)[:6]:
            ld = dict(leg)
            lid = ld.get("id")
            if lid is None:
                lid = f"{gid}|{ld.get('leg_index')}"
            metrics = per_leg.get(lid) or per_leg.get(ld.get("id"))
            if metrics:
                ld.update(metrics)
                if callable(price_fmt) and ld.get("avg_entry_after") is not None:
                    try:
                        ld["avg_entry_display"] = price_fmt(gd.get("symbol"), ld["avg_entry_after"])
                    except Exception:
                        pass
            recent.append(ld)
        gd["recent_legs"] = recent
        out.append(gd)
    return out


def patch_roll_hub_enrich(app: Flask, cfg: dict) -> None:
    """hub_bridge install 后：/api/hub/monitor 的 rolls 附带均价/止盈盈利。"""
    ctx = dict(app.config.get("HUB_CTX") or {})
    prev: Callable | None = ctx.get("enrich_monitor")

    def enrich_monitor(keys=None, orders=None, trends=None, rolls=None):
        payload: dict[str, Any] = {}
        if callable(prev):
            try:
                prev_out = prev(keys=keys, orders=orders, trends=trends, rolls=rolls)
                if isinstance(prev_out, dict):
                    payload.update(prev_out)
            except Exception:
                pass
        if rolls:
            get_db = cfg.get("get_db")
            if callable(get_db):
                conn = get_db()
                try:
                    payload["rolls"] = enrich_roll_groups_for_hub(list(rolls), conn, cfg)
                finally:
                    try:
                        conn.close()
                    except Exception:
                        pass
        return payload

    ctx["enrich_monitor"] = enrich_monitor
    app.config["HUB_CTX"] = ctx