"""하드닝 9회차 그룹 C(데이트레이딩) 회귀 테스트.

C-1 결과 불명 DT 매도 + ActiveTrade 없는 수동·HTS 보유분 → 수동 물량 재매도 방지(v3 판정)
C-2 기동 복원 검증이 주문가능수량·당일 PENDING DT 매도를 본다(v3)
C-3 잔고 조회 직후 일일 손실 한도 재확인
"""
from datetime import datetime
from types import SimpleNamespace
from unittest.mock import AsyncMock, patch

import pytest

from app.core.config import settings
from app.services.daytrading import entry_service as ens
from app.services.daytrading import exit_service as es
from app.services.daytrading import position_manager as pm
from app.services.daytrading.position_manager import DayTradingState, day_trading_state

CODE = "005930"


class _MustNotCall(BaseException):
    """호출되면 안 되는 경로 — 프로덕션 except Exception 에 삼켜지지 않게 BaseException."""


class OrderReached(BaseException):
    """safe_place_order 도달 — kwargs 를 실어 수량을 검증한다(값 반환 스텁 대신 예외형)."""


async def _order_reached(*a, **k):
    raise OrderReached(k)


def _raise(name):
    async def _f(*a, **k):
        raise _MustNotCall(name)
    return _f


class _Result:
    def __init__(self, rows):
        self._rows = rows

    def scalars(self):
        return self

    def all(self):
        return list(self._rows)


class _Session:
    def __init__(self, rows):
        self._rows = rows

    async def __aenter__(self):
        return self

    async def __aexit__(self, *a):
        return False

    async def execute(self, *_a, **_k):
        return _Result(self._rows)


def _th(ot, st, q, code=CODE):
    return SimpleNamespace(stock_code=code, order_type=ot, status=st, executed_quantity=q,
                           order_quantity=q, strategy_type="daytrading", created_at=datetime.now())


@pytest.fixture(autouse=True)
def _isolate(monkeypatch):
    import app.core.redis as _r
    es._unresolved_exit_unknown.clear()
    es._unknown_lookup_failures.clear()
    monkeypatch.setattr(settings, "DAY_TRADE_EXIT_UNKNOWN_LOOKUP_ALERT_COUNT", 10_000)
    monkeypatch.setattr(_r, "setex_json", AsyncMock(return_value=True))
    monkeypatch.setattr(_r, "get_json", AsyncMock(return_value=None))
    monkeypatch.setattr(pm, "_notify_daily_state_impl", AsyncMock(return_value=None))
    yield
    es._unresolved_exit_unknown.clear()
    es._unknown_lookup_failures.clear()


def _kis(monkeypatch, hldg, sellable, nd=0, orders=(), ledger=None):
    async def _h():
        return ({CODE: {"hldg": hldg, "sellable": sellable}}, True)

    async def _nd(code):
        return nd

    async def _o(code):
        return None if orders is None else list(orders)
    monkeypatch.setattr(es, "_fetch_kis_holdings_v3_impl", _h)
    monkeypatch.setattr(es, "_fetch_non_dt_active_qty_impl", _nd)
    monkeypatch.setattr(es, "_lookup_todays_orders_impl", _raise("v1 주문내역(실패=[]) 사용 금지"))
    monkeypatch.setattr(es, "_lookup_todays_orders_v2_impl", _o)
    if ledger is not None:
        monkeypatch.setattr(es, "_fetch_dt_ledger_net_qty_impl", ledger)


async def _ledger(n):
    async def _f(code):
        return n
    return _f


# ═══ C-1 ═════════════════════════════════════════════════════════════════════

@pytest.mark.asyncio
async def test_c1_manual_shares_after_filled_unknown_sell_not_resold(monkeypatch):
    """dt.md 재현: DT 10주 불명 매도(실체결) + HTS 5주(ActiveTrade 없음) → 재매도 0."""
    _kis(monkeypatch, 5, 5, ledger=_raise("원장 조회 전에 보류되어야 한다"))
    st, resp, cap = await es._resolve_unknown_exit_v3_impl(CODE, 10, es._kst_now(), 10)
    assert (st, resp, cap) == ("ambiguous", None, 0)

    # 재시도 경로 종단: 주문이 나가지 않고 보류가 유지된다
    es._unresolved_exit_unknown[(es._today_key(), CODE)] = {
        "qty": 10, "since": es._kst_now(), "total_qty": 10, "reason": "손절", "price": 9_700.0, "sell_pct": 1.0,
    }
    with patch("app.services.trade_executor.safe_place_order", _order_reached):
        res = await es._place_and_finalize_exit_impl(
            CODE, {"quantity": 10}, 9_700.0, "손절", 1.0, 10, 10, True, False)
    assert res is None
    assert (es._today_key(), CODE) in es._unresolved_exit_unknown
    assert es._last_exit_order_outcome[CODE] == "unknown"


@pytest.mark.asyncio
async def test_c1_genuine_not_accepted_still_resells(monkeypatch):
    """정상 not_accepted(원장 순체결 10, 잔고 10) → 10주 재매도."""
    _kis(monkeypatch, 10, 10, ledger=await _ledger(10))
    st, _r, cap = await es._resolve_unknown_exit_v3_impl(CODE, 10, es._kst_now(), 10)
    assert (st, cap) == ("not_accepted", 10)

    es._unresolved_exit_unknown[(es._today_key(), CODE)] = {
        "qty": 10, "since": es._kst_now(), "total_qty": 10, "reason": "손절", "price": 9_700.0, "sell_pct": 1.0,
    }
    with patch("app.services.trade_executor.safe_place_order", _order_reached):
        with pytest.raises(OrderReached) as ei:
            await es._place_and_finalize_exit_impl(
                CODE, {"quantity": 10}, 9_700.0, "손절", 1.0, 10, 10, True, False)
    assert ei.value.args[0]["quantity"] == 10


@pytest.mark.asyncio
async def test_c1_ledger_caps_resell(monkeypatch):
    """잔고상 DT 몫이 원장보다 크면(ActiveTrade 없는 수동분) 원장 순체결로 상한."""
    _kis(monkeypatch, 15, 15, ledger=await _ledger(10))
    st, _r, cap = await es._resolve_unknown_exit_v3_impl(CODE, 10, es._kst_now(), 10)
    assert (st, cap) == ("not_accepted", 10)


@pytest.mark.asyncio
async def test_c1_ledger_failure_holds(monkeypatch):
    """원장 조회 예외 → None → ledger_failed(재매도 보류, fail-closed)."""
    def _boom():
        raise RuntimeError("db down")
    monkeypatch.setattr("app.core.database.AsyncSessionLocal", _boom)
    assert await es._fetch_dt_ledger_net_qty_impl(CODE) is None

    _kis(monkeypatch, 10, 10)
    st, _r, cap = await es._resolve_unknown_exit_v3_impl(CODE, 10, es._kst_now(), 10)
    assert (st, cap) == ("ledger_failed", 0)
    es._unresolved_exit_unknown[(es._today_key(), CODE)] = {
        "qty": 10, "since": es._kst_now(), "total_qty": 10, "reason": "손절", "price": 9_700.0, "sell_pct": 1.0,
    }
    with patch("app.services.trade_executor.safe_place_order", _order_reached):
        res = await es._place_and_finalize_exit_impl(
            CODE, {"quantity": 10}, 9_700.0, "손절", 1.0, 10, 10, True, False)
    assert res is None


@pytest.mark.asyncio
async def test_c1_ledger_nonpositive_holds(monkeypatch):
    """원장 순체결 ≤ 0 → 재매도 보류(과다매도보다 보류, §3.5). 재시도 종단에서도 주문 0."""
    _kis(monkeypatch, 10, 10, ledger=await _ledger(0))
    st, _r, cap = await es._resolve_unknown_exit_v3_impl(CODE, 10, es._kst_now(), 10)
    assert (st, cap) == ("ledger_nonpositive", 0)
    es._unresolved_exit_unknown[(es._today_key(), CODE)] = {
        "qty": 10, "since": es._kst_now(), "total_qty": 10, "reason": "손절", "price": 9_700.0, "sell_pct": 1.0,
    }
    with patch("app.services.trade_executor.safe_place_order", _order_reached):
        res = await es._place_and_finalize_exit_impl(
            CODE, {"quantity": 10}, 9_700.0, "손절", 1.0, 10, 10, True, False)
    assert res is None and (es._today_key(), CODE) in es._unresolved_exit_unknown


@pytest.mark.asyncio
async def test_c1_orders_lookup_none_holds(monkeypatch):
    """주문내역 v2 조회 실패(None) → 보류(원장까지 가지 않는다)."""
    _kis(monkeypatch, 10, 10, orders=None, ledger=_raise("주문내역 실패 시 원장 불필요"))
    st, _r, cap = await es._resolve_unknown_exit_v3_impl(CODE, 10, es._kst_now(), 10)
    assert (st, cap) == ("orders_failed", 0)


@pytest.mark.asyncio
async def test_c1_v_repro_manual_ge_q_filled_not_resold(monkeypatch):
    """v_repro_dt: 수동 M=10 ≥ q=10, DT 10주 체결(잔고 온전해 보임). 주문내역에 등록 이후 행 → 접수 확정."""
    now = es._kst_now()
    row = {"pdno": CODE, "sll_buy_dvsn_cd": "01", "ord_qty": "10", "tot_ccld_qty": "10",
           "rjct_qty": "0", "cncl_yn": "N", "odno": "0000999", "ord_tmd": now.strftime("%H%M%S")}
    _kis(monkeypatch, 10, 10, orders=[row], ledger=_raise("접수 확정 시 원장 불필요"))
    st, resp, _ = await es._resolve_unknown_exit_v3_impl(CODE, 10, now, 10)
    assert st == "accepted" and resp["output"]["ODNO"] == "0000999"


@pytest.mark.asyncio
async def test_c1_v_repro_rows_invisible_ledger_zero_holds(monkeypatch):
    """v_repro_dt 원본(주문내역 [] + 원장 0) → 재매도 0(보류)."""
    _kis(monkeypatch, 10, 10, orders=[], ledger=await _ledger(0))
    st, _r, cap = await es._resolve_unknown_exit_v3_impl(CODE, 10, None, 10)
    assert (st, cap) == ("ledger_nonpositive", 0)


@pytest.mark.asyncio
async def test_c1_empty_orders_positive_ledger_capped_by_q(monkeypatch):
    """주문내역 [](KIS 미접수 실증) + 원장 > 0 → 재매도, 상한 min(DT 매도가능, 원장, q)."""
    _kis(monkeypatch, 15, 15, orders=[], ledger=await _ledger(20))
    st, _r, cap = await es._resolve_unknown_exit_v3_impl(CODE, 5, es._kst_now(), 10)
    assert (st, cap) == ("not_accepted", 5)


@pytest.mark.asyncio
async def test_c1_row_before_registration_or_without_time_ignored(monkeypatch):
    """등록 시각(−허용 오차) 이전 행·주문시각 없는 행은 같은 수량이어도 접수로 보지 않는다(r5 L-1 유지)."""
    from datetime import timedelta
    now = es._kst_now()
    early = (now - timedelta(seconds=float(settings.DAY_TRADE_EXIT_UNKNOWN_MATCH_WINDOW_SEC) + 60)).strftime("%H%M%S")
    base = {"pdno": CODE, "sll_buy_dvsn_cd": "01", "ord_qty": "10", "tot_ccld_qty": "10",
            "rjct_qty": "0", "cncl_yn": "N"}
    rows = [dict(base, odno="0000111", ord_tmd=early), dict(base, odno="0000222")]
    _kis(monkeypatch, 10, 10, orders=rows, ledger=await _ledger(10))
    st, _r, cap = await es._resolve_unknown_exit_v3_impl(CODE, 10, now, 10)
    assert (st, cap) == ("not_accepted", 10)


@pytest.mark.asyncio
async def test_c1_pending_other_order_reduces_sellable_still_resells(monkeypatch):
    """보유 30·주문가능 26·비DT 20: 보유 기준 DT 몫 10 온전 → v2 대로 6주 재매도(보류 아님)."""
    _kis(monkeypatch, 30, 26, nd=20, ledger=await _ledger(10))
    st, _r, cap = await es._resolve_unknown_exit_v3_impl(CODE, 10, es._kst_now(), 10)
    assert (st, cap) == ("not_accepted", 6)


@pytest.mark.asyncio
async def test_c1_matching_order_row_is_accepted(monkeypatch):
    now = es._kst_now()
    row = {"pdno": CODE, "sll_buy_dvsn_cd": "01", "ord_qty": "10", "tot_ccld_qty": "10",
           "rjct_qty": "0", "cncl_yn": "N", "odno": "0000777", "ord_tmd": now.strftime("%H%M%S")}
    _kis(monkeypatch, 5, 5, orders=[row], ledger=_raise("접수 확정 시 원장 불필요"))
    st, resp, _ = await es._resolve_unknown_exit_v3_impl(CODE, 10, now, 10)
    assert st == "accepted" and resp["output"]["ODNO"] == "0000777"


@pytest.mark.asyncio
async def test_c1_ledger_query_nets_pending_sell(monkeypatch):
    rows = [_th("BUY", "COMPLETED", 10), _th("SELL", "PENDING", 4), _th("SELL", "FAILED", 6)]
    monkeypatch.setattr("app.core.database.AsyncSessionLocal", lambda: _Session(rows))
    assert await es._fetch_dt_ledger_net_qty_impl(CODE) == 6


# ═══ C-2 ═════════════════════════════════════════════════════════════════════

def _restored_state(qty=10):
    st = DayTradingState()
    st.positions[CODE] = {
        "stock_name": "T", "strategy": "day_trade", "entry_price": 10_000.0, "stop_loss": 9_800.0,
        "target_price": 10_300.0, "quantity": qty, "highest_price": 10_000.0,
        "entry_time": datetime.combine(pm._today_kst(), datetime.min.time()).replace(hour=9, minute=10),
        "reason": "", "order_id": "", "restored_from_db": True,
    }
    return st


def _hold(hldg, sellable):
    async def _f():
        return {CODE: {"hldg": hldg, "sellable": sellable}}
    return _f


def _rows(rows):
    async def _f():
        return rows
    return _f


@pytest.mark.asyncio
async def test_c2_sellable_below_hldg_holds_restore():
    st = _restored_state(10)
    out = await st.verify_restored_today_positions_v3(
        session_factory=lambda: _Session([]), holdings_fetcher=_hold(10, 0), today_rows_fetcher=_rows([]))
    assert CODE in out["held"] and CODE not in st.positions


@pytest.mark.asyncio
async def test_c2_pending_dt_sell_holds_restore():
    st = _restored_state(10)
    out = await st.verify_restored_today_positions_v3(
        session_factory=lambda: _Session([]), holdings_fetcher=_raise("PENDING 보류 후 잔고 조회 불필요"),
        today_rows_fetcher=_rows([_th("SELL", "PENDING", 10)]))
    assert out["held"] == [CODE] and CODE not in st.positions


@pytest.mark.asyncio
async def test_c2_normal_restore_kept():
    st = _restored_state(10)
    out = await st.verify_restored_today_positions_v3(
        session_factory=lambda: _Session([]), holdings_fetcher=_hold(10, 10),
        today_rows_fetcher=_rows([_th("BUY", "COMPLETED", 10)]))
    assert out["held"] == [] and CODE in st.positions


@pytest.mark.asyncio
async def test_c2_ledger_failure_holds_when_orphan_detect_enabled(monkeypatch):
    monkeypatch.setattr(settings, "DAY_TRADE_ORPHAN_DETECT_ENABLED", True)
    st = _restored_state(10)
    out = await st.verify_restored_today_positions_v3(
        session_factory=lambda: _Session([]), holdings_fetcher=_raise("보류 후 잔고 조회 불필요"),
        today_rows_fetcher=_raise_plain())
    assert out["held"] == [CODE]


def _raise_plain():
    async def _f():
        raise RuntimeError("db down")
    return _f


@pytest.mark.asyncio
async def test_c2_intraday_restore_uses_sellable(monkeypatch):
    row = SimpleNamespace(stock_code=CODE, quantity=10)
    monkeypatch.setattr(day_trading_state, "positions", {})
    n = await es._restore_lost_today_positions_v2_impl([row], {CODE: {"hldg": 10, "sellable": 0}}, {})
    assert n == 0 and CODE not in day_trading_state.positions


# ═══ C-3 ═════════════════════════════════════════════════════════════════════

TOTAL = 100_000_000.0
CASH = 50_000_000.0


def _at(hh, mm):
    fake_now = datetime.now(ens._KST).replace(hour=hh, minute=mm, second=0)

    class _DT(datetime):
        @classmethod
        def now(cls, tz=None):
            return fake_now if tz else fake_now.replace(tzinfo=None)
    return _DT


class _Adp:
    fallback_used = False
    daytrading_enabled = True
    trading_mode = "normal"


async def _scan(monkeypatch, daily_pnl):
    captured: list = []

    async def fake_try_enter(code, name, total_assets, available_cash, is_lunch_break=False):
        captured.append(code)
        return None

    monkeypatch.setattr(day_trading_state, "positions", {})
    monkeypatch.setattr(day_trading_state, "closed_today", set())
    monkeypatch.setattr(day_trading_state, "last_total_assets", 0.0)  # 재기동 직후
    monkeypatch.setattr(day_trading_state, "daily_pnl", daily_pnl)
    monkeypatch.setattr(day_trading_state, "last_reset_date", pm._today_kst())  # 날짜 리셋 방지
    monkeypatch.setattr(day_trading_state, "loss_streak_today", 0, raising=False)
    monkeypatch.setattr(ens, "_non_dt_held_db", set())
    monkeypatch.setattr(ens, "_kis_holdings_snapshot", {})
    monkeypatch.setattr(ens, "_kis_holdings_verified", True)
    monkeypatch.setattr(ens, "datetime", _at(10, 30))
    ens.set_watchlist([{"code": CODE, "name": "삼성"}])
    balance = {"output1": [], "output2": [{"tot_evlu_amt": str(TOTAL), "prvs_rcdl_excc_amt": str(CASH)}]}
    try:
        with patch.object(ens.mdd_manager, "is_short_term_strategy_enabled", AsyncMock(return_value=True)), \
             patch.object(ens.mdd_manager, "can_open_new_position", AsyncMock(return_value=True)), \
             patch("app.services.adaptive_strategy.get_current_adaptive_params", return_value=_Adp()), \
             patch.object(ens, "is_daytrading_allowed_by_playbook", return_value=True), \
             patch.object(ens, "check_market_regime", AsyncMock(return_value={"regime": "neutral"})), \
             patch.object(ens.korea_investment_api, "get_balance", AsyncMock(return_value=balance)), \
             patch.object(ens.korea_investment_api, "get_buyable_cash", AsyncMock(return_value=CASH)), \
             patch.object(ens, "_prefetch_minute_charts", AsyncMock(return_value=0)), \
             patch.object(ens, "_try_enter", fake_try_enter):
            await ens.scan_and_enter()
    finally:
        ens.set_watchlist([])
    return captured


@pytest.mark.asyncio
async def test_c3_loss_limit_rechecked_after_balance(monkeypatch):
    from app.services.day_trading_strategy import _get_daily_loss_limit
    pnl = TOTAL * _get_daily_loss_limit() * 1.5  # 한도 초과 손실
    assert await _scan(monkeypatch, pnl) == []


@pytest.mark.asyncio
async def test_c3_control_no_loss_reaches_entry(monkeypatch):
    assert await _scan(monkeypatch, 0.0) == [CODE]