from django.contrib.auth.decorators import login_required
from django.core.exceptions import BadRequest, ObjectDoesNotExist, PermissionDenied
from django.db.models import Count
from django.http import Http404, HttpResponse, HttpResponseRedirect
from django.shortcuts import get_object_or_404, redirect, render
from django.urls import reverse
from django.utils.translation import gettext_lazy as _
from user_messages import api as msg

from catalog.models import *
from users.models import User
from users.views import render_user_blocked, render_user_not_found

from ..forms import *
from ..models import *
from .common import render_list, target_identity_required

PAGE_SIZE = 10


@login_required
@target_identity_required
def user_tag_list(request, user_name):
    target = request.target
    tags = Tag.objects.filter(owner=target)
    if target.user != request.user:
        tags = tags.filter(visibility=0)
    tags = tags.values("title").annotate(total=Count("members")).order_by("-total")
    return render(
        request,
        "user_tag_list.html",
        {
            "user": target.user,
            "tags": tags,
        },
    )


@login_required
def user_tag_edit(request):
    if request.method == "GET":
        tag_title = Tag.cleanup_title(request.GET.get("tag", ""), replace=False)
        if not tag_title:
            raise Http404()
        tag = Tag.objects.filter(owner=request.user.identity, title=tag_title).first()
        if not tag:
            raise Http404()
        return render(request, "tag_edit.html", {"tag": tag})
    elif request.method == "POST":
        tag_title = Tag.cleanup_title(request.POST.get("title", ""), replace=False)
        tag_id = request.POST.get("id")
        tag = (
            Tag.objects.filter(owner=request.user.identity, id=tag_id).first()
            if tag_id
            else None
        )
        if not tag or not tag_title:
            msg.error(request.user, _("无效标签"))
            return HttpResponseRedirect(request.META.get("HTTP_REFERER"))
        if request.POST.get("delete"):
            tag.delete()
            msg.info(request.user, _("标签已删除"))
            return redirect(
                reverse("journal:user_tag_list", args=[request.user.mastodon_acct])
            )
        elif (
            tag_title != tag.title
            and Tag.objects.filter(
                owner=request.user.identity, title=tag_title
            ).exists()
        ):
            msg.error(request.user, _("标签已存在"))
            return HttpResponseRedirect(request.META.get("HTTP_REFERER"))
        tag.title = tag_title
        tag.visibility = int(request.POST.get("visibility", 0))
        tag.visibility = 0 if tag.visibility == 0 else 2
        tag.save()
        msg.info(request.user, _("标签已修改"))
        return redirect(
            reverse(
                "journal:user_tag_member_list",
                args=[request.user.mastodon_acct, tag.title],
            )
        )
    raise BadRequest()


def user_tag_member_list(request, user_name, tag_title):
    return render_list(request, user_name, "tagmember", tag_title=tag_title)