import os
import uuid
from pathlib import Path

import aiofiles
from fastapi import UploadFile

from app.config import settings


async def save_upload_file(file: UploadFile, sub_dir: str = "reports") -> str:
    """Save uploaded file and return the relative URL path"""
    upload_path = Path(settings.upload_dir) / sub_dir
    upload_path.mkdir(parents=True, exist_ok=True)

    ext = Path(file.filename).suffix if file.filename else ".jpg"
    filename = f"{uuid.uuid4().hex}{ext}"
    file_path = upload_path / filename

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

    return f"/uploads/{sub_dir}/{filename}"