import aiofiles
from pathlib import Path
from lightsync.models.show import ShowModel


class ShowStore:
    def __init__(self, shows_dir: Path):
        self._dir = shows_dir

    def ensure_dir(self) -> None:
        self._dir.mkdir(parents=True, exist_ok=True)

    def _path_for(self, show_id: str) -> Path:
        return self._dir / f"{show_id}.json"

    async def save(self, show: ShowModel) -> None:
        path = self._path_for(str(show.id))
        async with aiofiles.open(path, "w") as f:
            await f.write(show.model_dump_json(indent=2))

    async def load(self, show_id: str) -> ShowModel | None:
        path = self._path_for(show_id)
        if not path.exists():
            return None
        async with aiofiles.open(path) as f:
            return ShowModel.model_validate_json(await f.read())

    def list_ids(self) -> list[str]:
        return [p.stem for p in self._dir.glob("*.json")]