import json

from django.core.handlers.wsgi import WSGIRequest
from django.http import HttpResponse

from .helper import get_user_object, get_username


def get_message_list(request: WSGIRequest) -> HttpResponse:
    username = get_username(request)
    if username is None:
        return HttpResponse(
            json.dumps({
                "success": False
            }),
            content_type="application/json",
            status=401
        )

    user = get_user_object(username, i_promise_this_user_exists=True)

    queryFilter = {}

    if "offset" in request.GET and (request.GET.get("offset") or "").isdigit():
        queryFilter["message_id__lt"] = int(request.GET.get("offset") or "")

    if "unread" in request.GET:
        queryFilter["response"] = None

    if queryFilter:
        msgObjects = user.received.filter(**queryFilter)
    else:
        msgObjects = user.received.all() # type: ignore

    output = []
    messages = msgObjects.order_by("-message_id")[:50].values_list(
        "message_id", "content", "response", "anonymous", "u_from"
    )

    for message in messages:
        output.append({
            "id": message[0],
            "content": message[1],
            "response": message[2],
            "from": message[4].username if not message[3] and message[4] else None
        })

    return HttpResponse(
        json.dumps({
            "success": True,
            "canRespond": True,
            "messages": output,
            "more": msgObjects.count() > 50
        }),
        content_type="application/json"
    )