from __future__ import annotations

import os
import uuid

from fastapi import UploadFile

UPLOAD_DIR = "uploads"


async def save_upload(file: UploadFile, subdir: str = "") -> str:
    directory = os.path.join(UPLOAD_DIR, subdir) if subdir else UPLOAD_DIR
    os.makedirs(directory, exist_ok=True)

    ext = os.path.splitext(file.filename or "")[1]
    filename = f"{uuid.uuid4().hex}{ext}"
    filepath = os.path.join(directory, filename)

    content = await file.read()
    with open(filepath, "wb") as f:
        f.write(content)

    return filepath