import os, uuid

from google.cloud import storage


JSON_CREDENTIALS_PATH = os.path.join(os.path.dirname(os.path.abspath(__file__)),"config/be1a_gcs_config.json")

_Google_HEAD = 'gs://'
os.environ["GOOGLE_APPLICATION_CREDENTIALS"] = JSON_CREDENTIALS_PATH

def is_google_path(path):
    return path.startswith(_Google_HEAD)

def parse_google_file(url):
    container_and_path = url.removeprefix(_Google_HEAD)
    return container_and_path.split("/", 1)

def build_google_url(container_name, path):
    return f'{_Google_HEAD}{container_name}/{path}'

def get_google_target_blob_file_list(url_prefix):
    try:

        bucket_path = parse_google_file(url_prefix)
        bucket_name = bucket_path[0]
        path_prefix = bucket_path[1]

        storage_client = storage.Client.from_service_account_json(JSON_CREDENTIALS_PATH)

        blob_list = list(storage_client.list_blobs(bucket_name, prefix=path_prefix))
        # print(f"in total {len(blob_list)} blob files found")
        res = []
        for blob in blob_list:
            file_name = blob.name
            if file_name.startswith(path_prefix):
                res.append(build_google_url(bucket_name, file_name))
    except Exception as ex:
        print('Exception:')
        print(ex)
        os._exit(1)


    print(f'in total {len(res)} files found')
    return res