"""Script to download external data for the project at build time."""

import logging
import os
import tarfile

import wget


def download_and_extract_models() -> None:
    """Downloads the models folder from the server and extracts it."""
    logging.debug("Downloading models folder.")
    models_url = os.environ.get("MODELS_FOLDER_URL")
    models_targz = "models.tar.gz"
    models_folder = "data/models/"
    try:
        wget.download(models_url, models_targz)

        logging.debug("Extracting models folder.")
        with tarfile.open(models_targz, "r:gz") as tar:
            tar.extractall(models_folder)

        os.remove(models_targz)
        logging.debug("Models folder downloaded and extracted.")
    except Exception as e:
        logging.error(f"Error downloading models folder: {e}")


def download_and_extract_item_embeddings() -> None:
    """Downloads the item embeddings folder from the server and extracts it."""
    logging.debug("Downloading item embeddings folder.")
    item_embeddings_url = os.environ.get("ITEM_EMBEDDINGS_URL")
    item_embeddings_tarbz = "item_embeddings.tar.bz2"
    item_embeddings_folder = "data/"

    try:
        wget.download(item_embeddings_url, item_embeddings_tarbz)

        logging.debug("Extracting item embeddings folder.")
        with tarfile.open(item_embeddings_tarbz, "r:bz2") as tar:
            tar.extractall(item_embeddings_folder)

        os.remove(item_embeddings_tarbz)
        logging.debug("Item embeddings folder downloaded and extracted.")
    except Exception as e:
        logging.error(f"Error downloading item embeddings folder: {e}")


if __name__ == "__main__":
    if not os.path.exists("data/models"):
        logging.info("Downloading models...")
        download_and_extract_models()

    if not os.path.exists("data/embed_items"):
        logging.info("Downloading item embeddings...")
        download_and_extract_item_embeddings()