"""업종·템플릿 정의. 프론트와 같은 파일(solution/shared/src/data/templates.json)을 읽는다."""
import json
from pathlib import Path

from common.enums import PlaceCategory

CATALOG_PATH = Path(__file__).resolve().parents[2] / "shared" / "src" / "data" / "templates.json"

_CATALOG = json.loads(CATALOG_PATH.read_text(encoding="utf-8"))

TEMPLATES: dict = _CATALOG["templates"]
INDUSTRIES: dict = _CATALOG["industries"]

_INDUSTRY_BY_CATEGORY = {
    PlaceCategory.LODGING.value: "stay",
    PlaceCategory.CAFE.value: "cafe",
    PlaceCategory.RESTAURANT.value: "restaurant",
    PlaceCategory.CLINIC.value: "clinic",
}


class UnknownTemplate(ValueError):
    pass


def industry_of(category: int) -> dict:
    key = _INDUSTRY_BY_CATEGORY.get(category)
    if key is None:
        raise ValueError(f"업종 코드에 맞는 정의가 없다: {category}")
    return INDUSTRIES[key]


def is_allowed(category: int, template_id: str) -> bool:
    return template_id in industry_of(category)["templates"]


def resolve_template_id(category: int, stored: str | None) -> str:
    template_id = (stored or "").strip() or industry_of(category)["defaultTemplate"]
    if not is_allowed(category, template_id):
        raise UnknownTemplate(f"업종 {category}에서 쓸 수 없는 템플릿: {template_id}")
    return template_id