from django.contrib.auth.decorators import login_required
from django.db.models import Max, Q
from django.shortcuts import redirect, render

from apps.applets.models import Applet, UserApplet
from apps.applets.utils import applet_context
from apps.drama.models import GameEvent, ScrollPosition
from apps.epic.models import GateSlot, Room, RoomInvite


@login_required(login_url="/")
def billboard(request):
    my_rooms = Room.objects.filter(
        Q(owner=request.user) |
        Q(gate_slots__gamer=request.user) |
        Q(invites__invitee_email=request.user.email, invites__status=RoomInvite.PENDING)
    ).distinct().order_by("-created_at")

    recent_room = (
        Room.objects.filter(
            Q(owner=request.user) | Q(gate_slots__gamer=request.user)
        )
        .annotate(last_event=Max("events__timestamp"))
        .filter(last_event__isnull=False)
        .order_by("-last_event")
        .distinct()
        .first()
    )
    recent_events = (
        list(recent_room.events.select_related("actor").order_by("-timestamp")[:36])[::-1]
        if recent_room else []
    )

    return render(request, "apps/billboard/billboard.html", {
        "my_rooms": my_rooms,
        "recent_room": recent_room,
        "recent_events": recent_events,
        "viewer": request.user,
        "applets": applet_context(request.user, "billboard"),
        "page_class": "page-billboard",
    })


@login_required(login_url="/")
def toggle_billboard_applets(request):
    checked = request.POST.getlist("applets")
    for applet in Applet.objects.filter(context="billboard"):
        UserApplet.objects.update_or_create(
            user=request.user,
            applet=applet,
            defaults={"visible": applet.slug in checked},
        )
    if request.headers.get("HX-Request"):
        return render(request, "apps/billboard/_partials/_applets.html", {
            "applets": applet_context(request.user, "billboard"),
        })
    return redirect("billboard:billboard")


@login_required(login_url="/")
def room_scroll(request, room_id):
    room = Room.objects.get(id=room_id)
    events = room.events.select_related("actor").all()
    sp = ScrollPosition.objects.filter(user=request.user, room=room).first()
    return render(request, "apps/billboard/room_scroll.html", {
        "room": room,
        "events": events,
        "viewer": request.user,
        "scroll_position": sp.position if sp else 0,
        "page_class": "page-billscroll",
    })


@login_required(login_url="/")
def save_scroll_position(request, room_id):
    if request.method != "POST":
        from django.http import HttpResponseNotAllowed
        return HttpResponseNotAllowed(["POST"])
    room = Room.objects.get(id=room_id)
    position = int(request.POST.get("position", 0))
    ScrollPosition.objects.update_or_create(
        user=request.user, room=room,
        defaults={"position": position},
    )
    from django.http import HttpResponse
    return HttpResponse(status=204)