"""
Authorization middleware — injects permissions and roles into request.
"""
from django.utils.deprecation import MiddlewareMixin

class AuthorizationMiddleware(MiddlewareMixin):
    """
    Inject user's roles and permissions into the request object.

    After processing:
    - request.roles: list of role names (e.g., ["platform_admin"])
    - request.permissions: set of permission codenames (e.g., {"users:read"})
    """

    def process_view(self, request, view_func, view_args, view_kwargs):
        if not hasattr(request, "user") or not request.user.is_authenticated:
            request.roles = []
            request.permissions = set()
            return None

        from apps.access.services.rbac_service import get_user_permissions, get_user_roles

        roles = get_user_roles(request.user)
        permissions = get_user_permissions(request.user)
        
        if hasattr(request, "tenant") and request.tenant:
            from apps.organizations.models import OrgRole
            # Fetch org-specific roles for the user
            org_roles = OrgRole.objects.filter(org=request.tenant, user=request.user).select_related('role')
            
            for org_role in org_roles:
                roles.append(org_role.role.name)
                # Fetch permissions for this org role
                from apps.access.models import RolePermission
                perms = RolePermission.objects.filter(role=org_role.role).select_related("permission")
                for rp in perms:
                    permissions.add(rp.permission.codename)

        request.roles = list(set(roles))
        request.permissions = permissions
        return None