"""Spotify parsing module."""

import re

import requests
from bs4 import BeautifulSoup

from src import constants


class ParsingError(Exception):
    """Error parsing the Spotify API."""
    def __init__(self, details=''):
        """Create ParsingError instance."""
        super().__init__()
        self.details = f'Failed to parse Spotify response: {details}'

    def __str__(self):
        """Convert to string."""
        return self.details


def get_spotify_monthly_listeners(spotify_id: str) -> int:
    """Get spotify monthly listeners.

    Args:
        spotify_id (str): the id of the model.

    Returns:
        int: the number of monthly listeners.

    Raises:
        HTTPError: Spotify returned an error (usually 404).
        ParsingError: Failed to parse the spotify artist page.

    """
    url = constants.SPOTIFY_URL_TEMPLATE + spotify_id
    response = requests.get(url)
    response.raise_for_status()
    soup = BeautifulSoup(response.text, features='html.parser')

    try:
        listeners_count = int(re.findall(
            r'\"monthly_listeners_count\":(\d+)', str(soup))[0])
    except Exception:
        listeners_count = None
    if not listeners_count:
        about_block = soup.find('h2', text='About')
        monthly_listeners_block = None

        if about_block:
            monthly_listeners_block = about_block.find_next('div')

        if not about_block:
            monthly_listeners_block = soup.find('div', class_='Type__TypeElement-sc-goli3j-0')

        if monthly_listeners_block and monthly_listeners_block.text:
            if 'monthly listener' not in monthly_listeners_block.text:
                raise ParsingError(
                    'The element containing monthly listeners figure was not found.')
            listeners_count = int(
                monthly_listeners_block.text.replace(
                    'monthly listeners', '').replace(
                        'monthly listener', '').strip().replace(',', ''))
        else:
            raise ParsingError('About block was not found')

    return listeners_count