import os
import json
from google.oauth2.service_account import Credentials
from googleapiclient.discovery import build
from googleapiclient.http import MediaFileUpload

# Si modificas estos SCOPES, borra el archivo token.json.
SCOPES = ['https://www.googleapis.com/auth/drive.file']

def authenticate_google_drive():
    """Autentica usando una cuenta de servicio."""
    service_account_info = json.loads(os.getenv('GOOGLE_SERVICE_ACCOUNT', '{}'))
    if not service_account_info:
        raise ValueError("No se encontró la información de la cuenta de servicio.")
    creds = Credentials.from_service_account_info(service_account_info, scopes=SCOPES)
    return creds

def upload_to_google_drive(file_path, folder_id=None):
    """Sube un archivo a Google Drive."""
    try:
        creds = authenticate_google_drive()
        service = build('drive', 'v3', credentials=creds)

        file_metadata = {'name': os.path.basename(file_path)}
        if folder_id:
            file_metadata['parents'] = [folder_id]

        media = MediaFileUpload(file_path, resumable=True)
        file = service.files().create(body=file_metadata, media_body=media, fields='id').execute()
        print(f"Archivo subido con ID: {file.get('id')}")
        return file.get('id')
    except Exception as e:
        print(f"Error subiendo a Google Drive: {e}")
        return None