from django.contrib.auth.mixins import LoginRequiredMixin
from django.http import HttpResponseBadRequest
from mixins.views import ObjectList

from core.models import Callback, Hook, Signal


def get_callbacks(user, hook=None, signal=None):
    if hook:
        cast = {"hook": hook, "hook__user": user}
    elif signal:
        cast = {"signal": signal, "signal__user": user}
    callbacks = Callback.objects.filter(**cast)
    return callbacks


class Callbacks(LoginRequiredMixin, ObjectList):
    list_template = "partials/callback-list.html"
    page_title = "List of received callbacks"

    context_object_name_singular = "callback"
    context_object_name = "callbacks"

    list_url_name = "callbacks"
    list_url_args = ["type", "object_type", "object_id"]

    def get_callbacks(self, user, hook=None, signal=None):
        if hook:
            cast = {"hook": hook, "hook__user": user}
        elif signal:
            cast = {"signal": signal, "signal__user": user}
        callbacks = Callback.objects.filter(**cast)
        return callbacks

    def get_queryset(self, **kwargs):
        object_type = kwargs.get("object_type")
        object_id = kwargs.get("object_id")
        if object_type == "hook":
            try:
                hook = Hook.objects.get(id=object_id, user=self.request.user)
            except Hook.DoesNotExist:
                message = "Hook does not exist."
                message_class = "danger"
                context = {
                    "message": message,
                    "class": message_class,
                    "type": type,
                }
                return self.render_to_response(context)
            callbacks = self.get_callbacks(self.request.user, hook)
        elif object_type == "signal":
            try:
                signal = Signal.objects.get(id=object_id, user=self.request.user)
            except Signal.DoesNotExist:
                message = "Signal does not exist."
                message_class = "danger"
                context = {
                    "message": message,
                    "class": message_class,
                    "type": type,
                }
                return self.render_to_response(context)
            callbacks = self.get_callbacks(self.request.user, signal=signal)
        else:
            return HttpResponseBadRequest("Invalid object type")

        return callbacks