# -*- coding: utf-8 -*-
"""한국은행 ECOS 환율 일별 CSV → 환율_한국은행환율.json (테이블ID FX · 최신 일자 5통화).

쓰기: ./venv/Scripts/python.exe resources/master_data/scripts/build_환율.py
비교: ./venv/Scripts/python.exe resources/master_data/scripts/build_환율.py --check  (파일·대장 안 씀)
"""

from __future__ import annotations

import csv
import hashlib
import json
import sys
from pathlib import Path

sys.path.insert(0, str(Path(__file__).parent))
import master_keys as mk  # noqa: E402
from _migrate_base import dump_master  # noqa: E402

ROOT = Path(__file__).resolve().parents[3]
OUT = Path(__file__).resolve().parents[1] / "환율_한국은행환율.json"
CSV_DIR = ROOT / "resources/knowledge/original/원가계산/환율_한국은행ECOS"
NAMES = {  # 항목코드 → (이름, 단위)
    "0000001": ("USD", "원/USD"),
    "0000002": ("JPY100", "원/JPY100"),
    "0000003": ("EUR", "원/EUR"),
    "0000012": ("GBP", "원/GBP"),
    "0000053": ("CNY", "원/CNY"),
}


def build() -> tuple[Path, dict, list[dict], dict]:
    path = sorted(CSV_DIR.glob("환율_일별_*.csv"))[-1]
    last: dict[str, tuple[str, float]] = {}
    with path.open(encoding="utf-8-sig", newline="") as f:
        for r in csv.DictReader(f):
            code, day, val = r["항목코드"], r["일자"], r["환율"]
            if code in NAMES and val and (code not in last or day > last[code][0]):
                last[code] = (day, float(val))
    day = max(d for d, _ in last.values())
    date = f"{day[:4]}-{day[4:6]}-{day[6:]}"
    book = mk.load_book()
    rows = []
    for code in sorted(NAMES):
        name, unit = NAMES[code]
        key = mk.issue(book, "FX", code, OUT.name)
        rows.append(
            {
                "키": key,
                "원문번호": code,
                "구분": None,
                "상세구분": None,
                "이름": name,
                "규격": date,
                "단위": unit,
                "값": last[code][1],
                "출처": f"한국은행환율 {code}",
                "비고": None,
            }
        )
    head = {
        "그룹": "환율",
        "원문": "한국은행환율",
        "판": date,
        "원천": [
            {
                "경로": path.relative_to(ROOT).as_posix(),
                "해시": hashlib.sha256(path.read_bytes()).hexdigest(),
                "역할": "primary",
            }
        ],
        "비고": ["규격 = 기준일 · 구분 · 상세구분은 두되 비움"],
    }
    return path, head, rows, book


def main() -> None:
    _, head, rows, book = build()
    if "--check" in sys.argv:
        now = json.loads(OUT.read_text(encoding="utf-8"))
        same = now["줄"] == rows and {k: now[k] for k in head} == head
        print("같음" if same else "다름")
        sys.exit(0 if same else 1)
    mk.finish(book)
    mk.save_book(book)
    dump_master(OUT, head, rows)


if __name__ == "__main__":
    main()