from django.core.exceptions import PermissionDenied
from django.utils.translation import gettext as _
from rest_framework.response import Response

from ...serializers import MovePostsSerializer


def posts_move_endpoint(request, thread, viewmodel):
    if not thread.acl["can_move_posts"]:
        raise PermissionDenied(_("You can't move posts in this thread."))

    serializer = MovePostsSerializer(
        data=request.data,
        context={
            "request": request,
            "settings": request.settings,
            "thread": thread,
            "viewmodel": viewmodel,
        },
    )

    if not serializer.is_valid():
        if "new_thread" in serializer.errors:
            errors = serializer.errors["new_thread"]
        else:
            errors = list(serializer.errors.values())[0]
        # Fix for KeyError - errors[0]
        try:
            return Response({"detail": errors[0]}, status=400)
        except KeyError:
            return Response({"detail": list(errors.values())[0][0]}, status=400)

    new_thread = serializer.validated_data["new_thread"]

    for post in serializer.validated_data["posts"]:
        post.move(new_thread)
        post.save()

    thread.synchronize()
    thread.save()

    new_thread.synchronize()
    new_thread.save()

    thread.category.synchronize()
    thread.category.save()

    if thread.category != new_thread.category:
        new_thread.category.synchronize()
        new_thread.category.save()

    return Response({})