"""
Custom allauth adapter for the hospital management system.
"""
from allauth.account.adapter import DefaultAccountAdapter
from django.conf import settings


class CustomAccountAdapter(DefaultAccountAdapter):
    """
    Custom account adapter to handle edge cases in allauth.
    """
    
    def is_safe_url(self, url):
        """
        Override is_safe_url to handle cases where request context is None.
        
        This fixes the AttributeError: 'NoneType' object has no attribute 'get_host'
        that occurs when context.request is None in certain scenarios.
        """
        if not url:
            return False
        
        # Try to get the request from the adapter's stash
        request = getattr(self, 'request', None)
        
        if request:
            # If we have a request, use the standard validation
            try:
                allowed_hosts = {request.get_host()} | set(settings.ALLOWED_HOSTS)
            except AttributeError:
                # Fallback if request doesn't have get_host
                allowed_hosts = set(settings.ALLOWED_HOSTS)
        else:
            # If no request available, just use ALLOWED_HOSTS
            allowed_hosts = set(settings.ALLOWED_HOSTS)
        
        # Use Django's url_has_allowed_host_and_scheme for validation
        from django.utils.http import url_has_allowed_host_and_scheme
        
        return url_has_allowed_host_and_scheme(
            url=url,
            allowed_hosts=allowed_hosts,
            require_https=request.is_secure() if request else False
        )