import uuid

from django.contrib.auth.mixins import LoginRequiredMixin
from django.http import HttpResponseBadRequest
from django.shortcuts import render
from django.views import View

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, View):
    allowed_types = ["modal", "widget", "window", "page"]
    window_content = "window-content/objects.html"
    list_template = "partials/callback-list.html"
    page_title = "List of received callbacks"

    async def get(self, request, type, object_type, object_id):
        if type not in self.allowed_types:
            return HttpResponseBadRequest
        template_name = f"wm/{type}.html"
        unique = str(uuid.uuid4())[:8]

        if object_type == "hook":
            try:
                hook = Hook.objects.get(id=object_id, user=request.user)
            except Hook.DoesNotExist:
                message = "Hook does not exist."
                message_class = "danger"
                context = {
                    "message": message,
                    "class": message_class,
                    "type": type,
                }
                return render(request, template_name, context)
            callbacks = get_callbacks(request.user, hook)
        elif object_type == "signal":
            try:
                signal = Signal.objects.get(id=object_id, user=request.user)
            except Signal.DoesNotExist:
                message = "Signal does not exist."
                message_class = "danger"
                context = {
                    "message": message,
                    "class": message_class,
                    "type": type,
                }
                return render(request, template_name, context)
            callbacks = get_callbacks(request.user, signal=signal)
        else:
            callbacks = get_callbacks(request.user)
        if type == "page":
            type = "modal"

        context = {
            "title": f"Callbacks ({type})",
            "unique": unique,
            "window_content": self.window_content,
            "list_template": self.list_template,
            "object_list": callbacks,
            "type": type,
            "page_title": self.page_title,
        }
        return render(request, template_name, context)