"""Spotify parsing module."""

import requests
from bs4 import BeautifulSoup


class ParsingError(Exception):
    """Error parsing the Spotify page."""

    pass


def get_artist_name(spotify_url: str) -> str:
    """Get artist name by artist/<id> url from title block."""
    response = requests.get(spotify_url)
    response.raise_for_status()
    soup = BeautifulSoup(response.text, features='html.parser')
    try:
        title_block = soup.find('title')
        print(title_block)
        # exp: <title>Bone Nest | Spotify</title>
        artist_name = title_block.text.split('|')[0].strip()
        if artist_name:
            return artist_name
        else:
            raise ParsingError('Block was parsed, but the data is empty.')
    except Exception as error:
        raise ParsingError('Parsing artist name is failed.', str(error))