"""build_horizon_rebalance_plan_v1.py — HORIZON_REBALANCE_PLAN_V1

routing_gate=FAIL 원인: SHORT 호라이즌 71.4% > 상한 40%.
어떤 종목을 어떤 순서로 줄여야 하는지 결정론적으로 산출한다.

입력: horizon_classification_v1.json + final_judgment_gate_v1.json + strategy_routing_audit_v1.json
출력: Temp/horizon_rebalance_plan_v1.json
"""
from __future__ import annotations

import argparse
import json
from pathlib import Path
from typing import Any

ROOT = Path(__file__).resolve().parents[1]
TEMP = ROOT / "Temp"
DEFAULT_JSON = ROOT / "GatherTradingData.json"
DEFAULT_OUT = TEMP / "horizon_rebalance_plan_v1.json"
FORMULA_ID = "HORIZON_REBALANCE_PLAN_V1"

SHORT_CAP_PCT = 40.0


def _load(path: Path) -> Any:
    if not path.exists():
        return {}
    try:
        return json.loads(path.read_text(encoding="utf-8"))
    except Exception:
        return {}


def _f(v: Any, default: float = 0.0) -> float:
    try:
        return float(v)
    except Exception:
        return default


def _extract_harness(payload: Any) -> dict[str, Any]:
    if not isinstance(payload, dict):
        return {}
    h = payload.get("hApex")
    dc = (payload.get("data") or {}).get("_harness_context")
    if isinstance(h, dict) and isinstance(dc, dict):
        m = dict(dc); m.update(h); return m
    return h if isinstance(h, dict) else dc if isinstance(dc, dict) else payload


def main() -> int:
    ap = argparse.ArgumentParser()
    ap.add_argument("--json", default=str(DEFAULT_JSON))
    ap.add_argument("--out", default=str(DEFAULT_OUT))
    args = ap.parse_args()

    json_path = Path(args.json)
    if not json_path.is_absolute():
        json_path = ROOT / json_path
    out_path = Path(args.out)
    if not out_path.is_absolute():
        out_path = ROOT / args.out

    payload = _load(json_path)
    harness = _extract_harness(payload)

    hz = _load(TEMP / "horizon_classification_v1.json")
    fj = _load(TEMP / "final_judgment_gate_v1.json")
    routing = _load(TEMP / "strategy_routing_audit_v1.json")

    alloc = hz.get("allocation_pct") or {}
    short_pct = _f(alloc.get("SHORT", 0))
    excess_pct = max(0.0, short_pct - SHORT_CAP_PCT)

    # SHORT 종목 목록 (horizon_classification)
    hz_rows = hz.get("rows") or []
    short_tickers = [r for r in hz_rows if isinstance(r, dict) and r.get("horizon") == "SHORT"]

    # final_judgment_gate의 verdict와 confidence 병합
    fj_map = {r.get("ticker"): r for r in (fj.get("rows") or []) if isinstance(r, dict)}

    # 총 포트폴리오 자산
    total_asset = _f(harness.get("total_asset_krw", 0))
    portfolio_equity = total_asset - _f(harness.get("settlement_cash_d2_krw", 0))

    # single_position_weight_json에서 비중 정보 조회
    spwj = harness.get("single_position_weight_json")
    if isinstance(spwj, str):
        try: spwj = json.loads(spwj)
        except Exception: spwj = []
    weight_map = {}
    for item in (spwj if isinstance(spwj, list) else []):
        if isinstance(item, dict):
            weight_map[str(item.get("ticker", ""))] = _f(item.get("weight_pct", 0))

    # SHORT 종목별 리밸런싱 우선순위 산출
    # 우선순위: SELL verdict > 낮은 confidence > 높은 weight
    candidates = []
    for r in short_tickers:
        ticker = r.get("ticker", "")
        fj_row = fj_map.get(ticker, {})
        verdict = str(fj_row.get("action_verdict", "UNKNOWN"))
        conf = _f(fj_row.get("effective_confidence", 50))
        weight_pct = weight_map.get(ticker, 0)
        market_value = portfolio_equity * weight_pct / 100 if portfolio_equity > 0 else 0
        disparity = _f(r.get("disparity_pct", 0))
        rsi14 = _f(r.get("rsi14", 50))

        # 우선순위 점수 (높을수록 먼저 줄임)
        priority = 0
        if verdict in ("SELL",): priority += 40
        elif verdict in ("TRIM",): priority += 20
        priority += max(0, 60 - conf)          # confidence 낮을수록 +
        priority += max(0, disparity - 5) * 2  # 이격도 높을수록 +
        priority += max(0, rsi14 - 60) * 0.5   # RSI 과매수일수록 +

        candidates.append({
            "ticker": ticker,
            "name": r.get("name", ""),
            "horizon": "SHORT",
            "verdict": verdict,
            "effective_confidence": conf,
            "weight_pct": weight_pct,
            "market_value_krw": round(market_value),
            "disparity_pct": disparity,
            "rsi14": rsi14,
            "priority_score": round(priority, 1),
        })

    candidates.sort(key=lambda x: x["priority_score"], reverse=True)

    # 목표: SHORT 비중을 40%로 줄이기 위한 최소 감축량
    target_short_pct = SHORT_CAP_PCT
    # 단순 비례: 현재 71.4% → 40% = 31.4%p 감축 필요
    # 각 종목의 비중을 합산해 필요 감축 시뮬레이션
    required_reduction_pct = excess_pct  # 31.4%p (SHORT 내 비중)
    # 절대 금액 환산 (portfolio_equity 기준)
    required_reduction_krw = portfolio_equity * required_reduction_pct / 100 if portfolio_equity > 0 else 0

    # 누적 시뮬레이션
    cum_reduction = 0.0
    plan_rows = []
    for c in candidates:
        if cum_reduction >= required_reduction_pct:
            break
        # 해당 종목 전량 매도 시 감축 pct (portfolio_equity 기준)
        trim_pct = c["weight_pct"]  # 포트폴리오 비중 = 감축 효과
        action = "FULL_TRIM" if verdict == "SELL" else "PARTIAL_TRIM"
        plan_rows.append({
            **c,
            "recommended_action": action,
            "trim_weight_pct": round(trim_pct, 2),
            "cum_short_reduction_pct": round(cum_reduction + trim_pct, 2),
        })
        cum_reduction += trim_pct

    result = {
        "formula_id": FORMULA_ID,
        "current_short_pct": short_pct,
        "short_cap_pct": SHORT_CAP_PCT,
        "excess_pct": round(excess_pct, 1),
        "required_reduction_pct": round(required_reduction_pct, 1),
        "required_reduction_krw": round(required_reduction_krw),
        "estimated_short_after_plan": round(max(0, short_pct - cum_reduction), 1),
        "gate_after_plan": "PASS" if max(0, short_pct - cum_reduction) <= SHORT_CAP_PCT else "FAIL",
        "plan_rows": plan_rows,
        "all_short_candidates": candidates,
        "note": (
            "포트폴리오 total_asset 기준 시뮬레이션. "
            "실제 weight_pct는 prices_json 기준이며 "
            "당일 종가 변동에 따라 달라질 수 있음."
        ),
    }

    out_path.write_text(json.dumps(result, ensure_ascii=False, indent=2) + "\n", encoding="utf-8")
    print(
        f"[{FORMULA_ID}] SHORT={short_pct}% excess={excess_pct}%p "
        f"plan_tickers={[r['ticker'] for r in plan_rows]} "
        f"after_plan={result['estimated_short_after_plan']}% "
        f"gate={result['gate_after_plan']} -> {out_path}"
    )
    return 0


if __name__ == "__main__":
    raise SystemExit(main())