from functools import wraps

from django.conf import settings
from django.http import HttpResponseForbidden
from django.shortcuts import get_object_or_404
from django.urls import reverse_lazy

from .models import Map
from .views import simple_json_response

LOGIN_URL = getattr(settings, "LOGIN_URL", "login")
LOGIN_URL = reverse_lazy(LOGIN_URL) if not LOGIN_URL.startswith("/") else LOGIN_URL


def login_required_if_not_anonymous_allowed(view_func):
    @wraps(view_func)
    def wrapper(request, *args, **kwargs):
        if (
            not getattr(settings, "UMAP_ALLOW_ANONYMOUS", False)
            and not request.user.is_authenticated
        ):
            return simple_json_response(login_required=str(LOGIN_URL))
        return view_func(request, *args, **kwargs)

    return wrapper


def can_edit_map(view_func):
    """
    Used for URLs dealing with editing the map.
    """

    @wraps(view_func)
    def wrapper(request, *args, **kwargs):
        map_inst = get_object_or_404(Map, pk=kwargs["map_id"])
        user = request.user
        kwargs["map_inst"] = map_inst  # Avoid rerequesting the map in the view
        if map_inst.edit_status >= map_inst.EDITORS:
            can_edit = map_inst.can_edit(user=user, request=request)
            if not can_edit:
                if map_inst.owner and not user.is_authenticated:
                    return simple_json_response(login_required=str(LOGIN_URL))
                return HttpResponseForbidden()
        return view_func(request, *args, **kwargs)

    return wrapper


def can_view_map(view_func):
    """
    Used for URLs dealing with viewing the map.
    """

    @wraps(view_func)
    def wrapper(request, *args, **kwargs):
        map_inst = get_object_or_404(Map, pk=kwargs["map_id"])
        kwargs["map_inst"] = map_inst  # Avoid rerequesting the map in the view
        if not map_inst.can_view(request):
            return HttpResponseForbidden()
        return view_func(request, *args, **kwargs)

    return wrapper


def jsonize_view(view_func):
    @wraps(view_func)
    def wrapper(request, *args, **kwargs):
        response = view_func(request, *args, **kwargs)
        response_kwargs = {}
        if hasattr(response, "rendered_content"):
            response_kwargs["html"] = response.rendered_content
        if response.has_header("location"):
            response_kwargs["redirect"] = response["location"]
        return simple_json_response(**response_kwargs)

    return wrapper