"""build_factor_shadow_eligibility_v1.py — FACTOR_SHADOW_ELIGIBILITY_V1

149개 팩터의 shadow 승격 자격을 실측 데이터로 평가한다.
spec/factor_lifecycle_registry.yaml의 required_data 필드 목록과
GatherTradingData.json의 실제 존재 키를 대조한다.

출력: Temp/factor_shadow_eligibility_v1.json
  - ELIGIBLE: required_data 전체 필드 GatherTradingData에 존재
  - PARTIAL: required 필드 50% 이상 존재 (optional 제외)
  - BLOCKED: required 필드 50% 미만 존재
"""
from __future__ import annotations

import json
from pathlib import Path
from typing import Any

import yaml

ROOT = Path(__file__).resolve().parents[1]
TEMP = ROOT / "Temp"
FORMULA_ID = "FACTOR_SHADOW_ELIGIBILITY_V1"
REGISTRY_PATH = ROOT / "spec" / "factor_lifecycle_registry.yaml"


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


def _flatten_keys(obj: Any, prefix: str = "") -> set[str]:
    """JSON 객체에서 모든 리프 키(소문자)를 재귀 수집."""
    keys: set[str] = set()
    if isinstance(obj, dict):
        for k, v in obj.items():
            full = f"{prefix}.{k}" if prefix else k
            keys.add(k.lower())
            keys.update(_flatten_keys(v, full))
    elif isinstance(obj, list):
        for item in obj:
            keys.update(_flatten_keys(item, prefix))
    return keys


def _check_factor(factor: dict, available_keys: set[str]) -> dict:
    factor_id = factor.get("factor_id", "UNKNOWN")
    required_data = factor.get("required_data") or []

    required_fields = [
        f["field"].lower()
        for f in required_data
        if isinstance(f, dict) and not f.get("optional", False)
    ]
    optional_fields = [
        f["field"].lower()
        for f in required_data
        if isinstance(f, dict) and f.get("optional", False)
    ]

    if not required_fields:
        # required_data가 없으면 데이터 불가지론 — 승격 자격 없음
        return {
            "factor_id": factor_id,
            "promotion_gate": factor.get("promotion_gate", "draft"),
            "eligibility": "NO_REQUIRED_DATA",
            "required_field_count": 0,
            "present_count": 0,
            "coverage_pct": 0.0,
            "missing_required": [],
            "present_optional": [],
        }

    present = [f for f in required_fields if f in available_keys]
    missing = [f for f in required_fields if f not in available_keys]
    optional_present = [f for f in optional_fields if f in available_keys]

    coverage = len(present) / len(required_fields) if required_fields else 0.0

    if coverage >= 1.0:
        eligibility = "ELIGIBLE"
    elif coverage >= 0.5:
        eligibility = "PARTIAL"
    else:
        eligibility = "BLOCKED"

    return {
        "factor_id": factor_id,
        "promotion_gate": factor.get("promotion_gate", "draft"),
        "eligibility": eligibility,
        "required_field_count": len(required_fields),
        "present_count": len(present),
        "coverage_pct": round(coverage * 100, 1),
        "missing_required": missing,
        "present_optional": optional_present,
    }


def main() -> int:
    if not REGISTRY_PATH.exists():
        print(f"[ERROR] Registry not found: {REGISTRY_PATH}")
        return 1

    registry = yaml.safe_load(REGISTRY_PATH.read_text(encoding="utf-8"))
    factors = registry.get("factors") or []

    payload = _load_json(ROOT / "GatherTradingData.json")
    available_keys = _flatten_keys(payload)

    rows = [_check_factor(f, available_keys) for f in factors]

    eligible = [r for r in rows if r["eligibility"] == "ELIGIBLE"]
    partial = [r for r in rows if r["eligibility"] == "PARTIAL"]
    blocked = [r for r in rows if r["eligibility"] == "BLOCKED"]
    no_data = [r for r in rows if r["eligibility"] == "NO_REQUIRED_DATA"]

    summary = {
        "total": len(rows),
        "eligible_count": len(eligible),
        "partial_count": len(partial),
        "blocked_count": len(blocked),
        "no_required_data_count": len(no_data),
        "eligible_pct": round(len(eligible) / len(rows) * 100, 1) if rows else 0.0,
        "shadow_ready_ids": [r["factor_id"] for r in eligible],
    }

    result = {
        "formula_id": FORMULA_ID,
        "gate": "PASS" if eligible else "FAIL",
        "summary": summary,
        "rows": rows,
        "note": (
            "ELIGIBLE = required_data 전체 필드가 GatherTradingData.json에 존재. "
            "shadow 승격은 별도 spec/57 shadow_promotion_scorecard 기준(live_sample>=30 등) 충족 후 가능."
        ),
    }

    out = TEMP / "factor_shadow_eligibility_v1.json"
    out.write_text(json.dumps(result, ensure_ascii=False, indent=2) + "\n", encoding="utf-8")

    print(f"[{FORMULA_ID}] total={len(rows)} eligible={len(eligible)} partial={len(partial)} blocked={len(blocked)}")
    print(f"  Shadow-ready factors ({len(eligible)}): {[r['factor_id'] for r in eligible[:5]]}...")
    if blocked:
        print(f"  Blocked ({len(blocked)}): {[r['factor_id'] for r in blocked[:5]]}...")
    return 0


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