import os
import shutil
from fastapi import APIRouter, UploadFile, File, HTTPException
from app.core.config import settings

router = APIRouter(tags=["Storage"])

@router.post("/storage/upload")
async def upload_file(file: UploadFile = File(...)):
    """Upload a file to landing storage staging area."""
    try:
        os.makedirs(settings.UPLOADS_DIR, exist_ok=True)
        dest_path = os.path.join(settings.UPLOADS_DIR, file.filename)
        with open(dest_path, "wb") as buffer:
            shutil.copyfileobj(file.file, buffer)
        s3_uri = f"s3://dlh-landing/uploads/{file.filename}"
        return {
            "status": "success",
            "filename": file.filename,
            "local_path": dest_path,
            "s3_uri": s3_uri,
            "message": f"File '{file.filename}' successfully uploaded to landing storage."
        }
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"File upload error: {str(e)}")