import argparse
import json

from google.cloud import storage
from google.oauth2 import service_account


def download_gcs_object(bucket_name: str, object_name: str):
    with open("/usr/src/app/credentials_object.json", "r") as f:
        credentials_dict = json.load(f)
    credentials = service_account.Credentials.from_service_account_info(
        credentials_dict
    )
    client = storage.Client(
        credentials=credentials, project=credentials_dict["project_id"]
    )
    blob = client.bucket(bucket_name).blob(object_name)
    blob.download_to_filename(object_name)


if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument("--bucket-name", type=str, required=True)
    parser.add_argument("--object-name", type=str, required=True)
    args = parser.parse_args()
    download_gcs_object(args.bucket_name, args.object_name)