"""Module that initializes the Flask application."""
import logging
import os

import nltk
from dotenv import load_dotenv
from flask import Flask

from routes import main

load_dotenv(".env")


def download_nltk_resources():
    try:
        # Check if 'punkt_tab' is available
        nltk.data.find('tokenizers/punkt_tab')
    except LookupError:
        # If not present, download it
        print("Downloading 'punkt_tab' tokenizer...")
        nltk.download('punkt_tab')
        nltk.download('punkt')
        print("'punkt_tab' tokenizer has been downloaded.")
    else:
        print("'punkt_tab' tokenizer is already available.")


def create_app():
    """
    Creates and configures the Flask application.

    Returns:
        Flask: The configured Flask application.
    """
    flask_app = Flask(__name__)
    logging.basicConfig(
        format='%(asctime)s - %(levelname)s - %(funcName)s - %(message)s')

    download_nltk_resources()

    logging.getLogger().setLevel(os.environ.get("LOG_LEVEL", "INFO").upper())
    flask_app.register_blueprint(main.bp)

    return flask_app


app = create_app()