"""Internationalisation — built-in NL + EN."""
import json
from pathlib import Path

_DIR = Path(__file__).parent.parent / "translations"
_cache: dict[str, dict] = {}
_langs: dict[str, dict] = {}


def load():
    _cache.clear()
    _langs.clear()
    if not _DIR.exists():
        return
    for f in sorted(_DIR.glob("*.json")):
        try:
            data = json.loads(f.read_text("utf-8"))
            meta = data.get("_meta", {})
            code = meta.get("code", f.stem)
            _langs[code] = meta
            _cache[code] = {k: v for k, v in data.items() if not k.startswith("_")}
        except Exception:
            pass


def available() -> list[dict]:
    if not _langs:
        load()
    return [{"code": k, "name": v.get("name", k), "flag": v.get("flag", "")}
            for k, v in _langs.items()]


def strings(lang: str) -> dict:
    if not _cache:
        load()
    base = dict(_cache.get("en", {}))
    if lang != "en" and lang in _cache:
        base.update(_cache[lang])
    return base