"""저장 뒤 식 · 값 유지 — M02 면적산출 · 재료산출 저장본을 서버 엔진으로 다시 풀면 저장된 `계산값` 과 같음.

읽기만 함(저장본을 고치지 않음). 저장 때 서버가 적은 값과 지금 엔진 풀이가 어긋나면 화면을 다시 열 때
값이 달라 보임.
"""

import json
import shutil
from pathlib import Path

import pytest

from common_util import common_util_spreadsheet as spreadsheet

ROOT = Path(__file__).resolve().parents[3]
FOLDER = ROOT / "resources" / "master_template"

pytestmark = pytest.mark.skipif(shutil.which("node") is None, reason="node 가 없음")


def _books() -> list[tuple[str, dict]]:
    out = []
    for kind in ("area", "material"):
        for path in sorted((FOLDER / kind).glob("[!.]*.json")):
            book = json.loads(path.read_text(encoding="utf-8"))
            if isinstance(book, dict) and book.get("시트"):
                out.append((f"{kind}/{path.stem}", book))
    return out


def test_저장본_서버_재계산_같음():
    books = _books()
    assert any("계산값" in b for _, b in books), "계산값 있는 저장본이 없음"
    fresh = spreadsheet.recalc_workbooks([b for _, b in books])
    diffs = []
    for (name, book), values in zip(books, fresh):
        if "계산값" not in book:
            continue  # 옛 저장본 — 풀리기만 하면 됨
        saved = book["계산값"]
        for sheet, cells in values.items():
            for addr, v in cells.items():
                if saved.get(sheet, {}).get(addr) != v:
                    diffs.append(
                        f"{name} {sheet}!{addr}: 저장 {saved.get(sheet, {}).get(addr)} · 지금 {v}"
                    )
        for sheet, cells in saved.items():
            for addr in cells:
                if addr not in values.get(sheet, {}):
                    diffs.append(f"{name} {sheet}!{addr}: 저장에만 있음")
    assert not diffs, "\n".join(diffs[:30])