import uuid
from pathlib import Path

from app.core.config import settings


def save_upload(data: bytes, case_id: str, filename: str) -> tuple[str, str]:
    """Save uploaded file and return (file_path, thumb_path) relative to UPLOAD_DIR."""
    case_dir = settings.upload_path / case_id
    case_dir.mkdir(parents=True, exist_ok=True)

    ext = Path(filename).suffix or ".png"
    unique_name = f"{uuid.uuid4().hex}{ext}"
    file_path = case_dir / unique_name
    file_path.write_bytes(data)

    relative = f"{case_id}/{unique_name}"
    return relative, relative