import requests
import re
from bs4 import BeautifulSoup

from typing import Optional
from updater.site.abstract_site import AbstractSite
from updater.site.enum import GameVersion
from updater.site import CURSE_UA


class GitHubRelease(AbstractSite):
    _URLS = ['https://www.github.com/', 'https://github.com/']

    session = requests.session()

    def __init__(self, url: str):
        super().__init__(url, GameVersion.agnostic)

    @classmethod
    def handles(cls, url: str) -> bool:
        return bool(re.match('^https://(www.)?github.com/[^/]+/[^/]+/releases/?$', url))

    def find_zip_url(self):
        try:
            response = GitHubRelease.session.get(self.url+"/expanded_assets/"+self.get_latest_version())
            response.raise_for_status()
            page = BeautifulSoup(response.text, 'html.parser')
            zipurl = list(
                    filter(lambda a: not any(ext in a for ext in ['wrath','classic','tbc','ctbc','wotlk','cwotlk']),
                        filter(lambda a: a.endswith('.zip'), 
                            map(lambda a: a['href'], page.findAll('a'))
                        )
                    )
                )
            return "https://github.com"+zipurl[0]
        except Exception as e:
            raise self.download_error() from e

    def _get_repo_name(self):
        _, owner, repo, _ = self.url.removeprefix('https://').split('/', 4)
        return f'{owner}/{repo}'

    def get_latest_version(self):
        try:
            response = GitHubRelease.session.get(self.url)
            response.raise_for_status()
            page = BeautifulSoup(response.text, 'html.parser')
            tags = page.find('svg',attrs={'class': 'octicon-tag'}).parent
            version = tags.find('span').get_text(strip=True)
            return version
        except Exception as e:
            raise self.version_error() from e

    def get_addon_name(self):
        return self._get_repo_name().split('/')[-1]