import os
from typing import Dict

from fastapi import UploadFile
from src.db_local_storage.files_db import FILES_DIRECTORY, FILES_NAMES_DATABASE


class UploadDocumentFeature:

    @staticmethod
    def ensure_directory_exists(folder_path: str) -> None:
        """Ensure that the directory exists."""
        if not os.path.exists(folder_path):
            os.makedirs(folder_path)

    @staticmethod
    async def saveFile(document: UploadFile, directory: str) -> str:
        """Save the uploaded file to the specified directory."""
        file_path = os.path.join(directory, document.filename)
        with open(file_path, "wb") as file:
            content = await document.read()
            file.write(content)
        return file_path

    @staticmethod
    async def uploadFile(document: UploadFile) -> Dict[str, str]:
        """
        Upload a file to the server
        :param document: the file to upload
        :return: a message to confirm the upload
        """

        UploadDocumentFeature.ensure_directory_exists(FILES_DIRECTORY)
        id = len(FILES_NAMES_DATABASE) + 1
        FILES_NAMES_DATABASE[id] = document.filename

        file_path = await UploadDocumentFeature.saveFile(document, FILES_DIRECTORY)

        return {"message": "Document Updated"}