from xml.etree import ElementTree
from xml.parsers.expat import ExpatError

from allauth.socialaccount.providers.oauth.client import OAuth
from allauth.socialaccount.providers.oauth.views import (
    OAuthAdapter,
    OAuthCallbackView,
    OAuthLoginView,
)

from .provider import OpenStreetMapProvider


class OpenStreetMapAPI(OAuth):
    url = "https://www.openstreetmap.org/api/0.6/user/details"

    def get_user_info(self):
        raw_xml = self.query(self.url)
        try:
            user_element = ElementTree.fromstring(raw_xml).find("user")
            user_info = user_element.attrib
            user_avatar = user_element.find("img")
            if user_avatar is not None:
                user_info.update({"avatar": user_avatar.attrib.get("href")})
            return user_info
        except (ExpatError, KeyError, IndexError):
            return None


class OpenStreetMapOAuthAdapter(OAuthAdapter):
    provider_id = OpenStreetMapProvider.id
    request_token_url = "https://www.openstreetmap.org/oauth/request_token"
    access_token_url = "https://www.openstreetmap.org/oauth/access_token"
    authorize_url = "https://www.openstreetmap.org/oauth/authorize"

    def complete_login(self, request, app, token, response):
        client = OpenStreetMapAPI(
            request, app.client_id, app.secret, self.request_token_url
        )
        extra_data = client.get_user_info()
        return self.get_provider().sociallogin_from_response(request, extra_data)


oauth_login = OAuthLoginView.adapter_view(OpenStreetMapOAuthAdapter)
oauth_callback = OAuthCallbackView.adapter_view(OpenStreetMapOAuthAdapter)