def extract_zip(extraction_folder, zip_name):
    os.makedirs(extraction_folder)
    with zipfile.ZipFile(zip_name, 'r') as zip_ref:
        zip_ref.extractall(extraction_folder)
    os.remove(zip_name)

    index_filepath, model_filepath = None, None
    for root, dirs, files in os.walk(extraction_folder):
        for name in files:
            if name.endswith('.index') and os.stat(os.path.join(root, name)).st_size > 1024 * 100:
                index_filepath = os.path.join(root, name)

            if name.endswith('.pth') and os.stat(os.path.join(root, name)).st_size > 1024 * 1024 * 40:
                model_filepath = os.path.join(root, name)

    if not model_filepath:
        raise Exception(f'No .pth model file was found in the extracted zip. Please check {extraction_folder}.')

    # move model and index file to extraction folder
    os.rename(model_filepath, os.path.join(extraction_folder, os.path.basename(model_filepath)))
    if index_filepath:
        os.rename(index_filepath, os.path.join(extraction_folder, os.path.basename(index_filepath)))

    # remove any unnecessary nested folders
    for filepath in os.listdir(extraction_folder):
        if os.path.isdir(os.path.join(extraction_folder, filepath)):
            shutil.rmtree(os.path.join(extraction_folder, filepath))


def download_online_model(url, dir_name, models_dir='./rvc_models'):
    try:
        print(f'[~] Downloading voice model with name {dir_name}...')
        zip_name = url.split('/')[-1]
        extraction_folder = os.path.join(models_dir, dir_name)
        
        if os.path.exists(extraction_folder):
            return f'[!] Voice model directory {dir_name} already exists! Choose a different name for your voice model.'

        # Download from pixeldrain
        if 'pixeldrain.com' in url:
            url = f'https://pixeldrain.com/api/file/{zip_name}'
            urllib.request.urlretrieve(url, zip_name)
        # Download from Google Drive
        elif 'drive.google.com' in url:
            zip_name = dir_name + ".zip"
            gdown.download(url, output=zip_name, use_cookies=True, quiet=True)
        else:
            # General URL download
            urllib.request.urlretrieve(url, zip_name)

        print(f'[~] Extracting zip file...')
        extract_zip(extraction_folder, zip_name)
        print(f'[+] {dir_name} Model successfully downloaded!')
        
        # Return success message after successful download
        return f"[+] {dir_name} Model successfully downloaded!"

    except Exception as e:
        # Return the error message instead of raising an exception
        return f'[!] Error: {str(e)}'