#!/usr/bin/env python3
from __future__ import annotations

import argparse
import datetime as dt
import json
import sys
from pathlib import Path
from typing import Any

from openpyxl import load_workbook


ROOT = Path(__file__).resolve().parents[1]
DEFAULT_XLSX = ROOT / "GatherTradingData.xlsx"
MAX_AGE_DAYS = 31


def _txt(value: Any, default: str = "") -> str:
    if value is None:
        return default
    if isinstance(value, str):
        return value.strip() or default
    return str(value).strip() or default


def _parse_date(value: Any) -> dt.date | None:
    text = _txt(value)
    if not text:
        return None
    for fmt in ("%Y-%m-%d", "%Y.%m.%d", "%Y/%m/%d"):
        try:
            return dt.datetime.strptime(text[:10], fmt).date()
        except Exception:
            pass
    try:
        return dt.date.fromisoformat(text[:10])
    except Exception:
        return None


def _age_days(value: Any) -> int | None:
    parsed = _parse_date(value)
    if parsed is None:
        return None
    today = dt.datetime.now(dt.timezone(dt.timedelta(hours=9))).date()
    return (today - parsed).days


def main() -> int:
    ap = argparse.ArgumentParser()
    ap.add_argument("--xlsx", default=str(DEFAULT_XLSX))
    args = ap.parse_args()

    xlsx = Path(args.xlsx)
    if not xlsx.exists():
        print(f"[오류] 워크북 없음: {xlsx}")
        return 1

    wb = load_workbook(xlsx, data_only=True)
    if "sector_universe" not in wb.sheetnames:
        print("[FAIL] sector_universe 시트가 없습니다.")
        return 1

    ws = wb["sector_universe"]
    headers = [_txt(ws.cell(2, c).value) for c in range(1, ws.max_column + 1)]
    idx = {name: i for i, name in enumerate(headers) if name}
    required = ["Sector", "Proxy_Ticker", "Constituent_Code", "Weight", "Source", "Source_URL", "Source_AsOf"]
    missing_headers = [h for h in required if h not in idx]

    rows: list[dict[str, Any]] = []
    for r in range(3, ws.max_row + 1):
        row = {h: ws.cell(r, c + 1).value for c, h in enumerate(headers) if h}
        if not any(v not in (None, "") for v in row.values()):
            continue
        rows.append(row)

    sector_map: dict[str, list[dict[str, Any]]] = {}
    for row in rows:
        sector = _txt(row.get("Sector"))
        if sector:
            sector_map.setdefault(sector, []).append(row)

    template_rows = 0
    representative_rows = 0
    sheet_input_rows = 0
    naver_rows = 0
    layout_changed_rows = 0
    fail_rows = 0
    missing_source_url = 0
    stale_rows = 0
    mixed_sector_count = 0
    sector_status_rows: list[str] = []

    for sector, sector_rows in sector_map.items():
        source_kinds = {_txt(r.get("Source"), "SHEET_INPUT") or "SHEET_INPUT" for r in sector_rows}
        if len(source_kinds) > 1:
            mixed_sector_count += 1
            sector_status_rows.append(f"{sector}:MIXED({','.join(sorted(source_kinds))})")

        sector_template = any(src == "DEFAULT_TEMPLATE" for src in source_kinds)
        sector_rep = any(src == "REPRESENTATIVE_STOCK_PROXY" for src in source_kinds)
        sector_input = any(src == "SHEET_INPUT" for src in source_kinds)
        sector_naver = any(src == "NAVER_ETF_PAGE" for src in source_kinds)
        sector_layout_changed = any(src == "NAVER_ETF_PAGE_FAIL_LAYOUT_CHANGED" for src in source_kinds)
        sector_fail = any("FAIL" in src for src in source_kinds)

        if sector_template:
            template_rows += len(sector_rows)
        if sector_rep:
            representative_rows += len(sector_rows)
        if sector_input:
            sheet_input_rows += len(sector_rows)
        if sector_naver:
            naver_rows += len(sector_rows)
        if sector_layout_changed:
            layout_changed_rows += len(sector_rows)
        if sector_fail:
            fail_rows += len(sector_rows)

        source_urls = {_txt(r.get("Source_URL")) for r in sector_rows if _txt(r.get("Source_URL"))}
        if not source_urls:
            missing_source_url += len(sector_rows)

        ages = [_age_days(r.get("Source_AsOf")) for r in sector_rows]
        age_vals = [a for a in ages if a is not None]
        if age_vals and max(age_vals) > MAX_AGE_DAYS:
            stale_rows += sum(1 for a in age_vals if a is not None and a > MAX_AGE_DAYS)
            sector_status_rows.append(f"{sector}:STALE(max={max(age_vals)})")

    gate = "PASS"
    if missing_headers:
        gate = "FAIL"
    elif template_rows > 0 or fail_rows > 0 or stale_rows > 0 or mixed_sector_count > 0:
        gate = "FAIL"
    elif sheet_input_rows > 0:
        gate = "WARN"

    print(f"[sector_universe_refresh] gate={gate}")
    print(f"  rows={len(rows)} sectors={len(sector_map)}")
    print(f"  naver_rows={naver_rows} representative_rows={representative_rows} layout_changed_rows={layout_changed_rows} sheet_input_rows={sheet_input_rows} template_rows={template_rows} fail_rows={fail_rows}")
    print(f"  missing_source_url={missing_source_url} stale_rows={stale_rows} mixed_sector_count={mixed_sector_count}")
    if missing_headers:
        print(f"  missing_headers={missing_headers}")
    if sector_status_rows:
        print("  sector_flags=" + ", ".join(sector_status_rows[:20]))

    result = {
        "validator": "validate_sector_universe_monthly_refresh_v1",
        "gate": gate,
        "total_rows": len(rows),
        "sector_count": len(sector_map),
        "naver_rows": naver_rows,
        "representative_rows": representative_rows,
        "layout_changed_rows": layout_changed_rows,
        "sheet_input_rows": sheet_input_rows,
        "template_rows": template_rows,
        "fail_rows": fail_rows,
        "missing_source_url": missing_source_url,
        "stale_rows": stale_rows,
        "mixed_sector_count": mixed_sector_count,
        "missing_headers": missing_headers,
        "sector_flags": sector_status_rows,
        "max_age_days": MAX_AGE_DAYS,
    }
    out = ROOT / "Temp" / "sector_universe_refresh_validation.json"
    out.write_text(json.dumps(result, ensure_ascii=False, indent=2), encoding="utf-8")
    print(f"OUTPUT: {out}")
    return 0 if gate in {"PASS", "WARN"} else 1


if __name__ == "__main__":
    sys.exit(main())