# import calendar
# from django.utils import timezone

# from ajaxdatatable.admin import AjaxDatatable
# from django.contrib import admin
# from django.utils.translation import gettext_lazy as _
# from django.contrib.admin import SimpleListFilter
# from django.db.models.functions import Rank, Coalesce
# from django.db.models import Sum, F, Window, CharField
# from django.utils.html import format_html
# from apps.quiz.models import Quiz, QuizRankUser, Participant, QuizCategory
# from apps.account.models import User


# class QuizFilter(SimpleListFilter):
#     title = _('Quiz')
#     parameter_name = 'quiz'

#     def lookups(self, request, model_admin):
#         quizzes = Quiz.objects.all()
#         return [(quiz.id, quiz.video.title) for quiz in quizzes]

#     def queryset(self, request, queryset):
#         if self.value():
#             return queryset.filter(uquizzes__quiz__id=self.value())
#         return queryset
    
# class QuizCategoryFilter(SimpleListFilter):
#     title = _('Quiz Category')
#     parameter_name = 'quiz_category'

#     def lookups(self, request, model_admin):
#         categories = QuizCategory.objects.all()
#         return [(category.id, category.name) for category in categories]

#     def queryset(self, request, queryset):
#         if self.value():
#             return queryset.filter(uquizzes__quiz__category__id=self.value())
#         return queryset

# class MonthFilter(SimpleListFilter):
#     title = _('Month')
#     parameter_name = 'month'

#     def lookups(self, request, model_admin):
#         return [(str(i), calendar.month_name[i]) for i in range(1, 13)]

#     def queryset(self, request, queryset):
#         if self.value():
#             month = int(self.value())
#             year = timezone.now().year
#             return queryset.filter(uquizzes__started_at__year=year, uquizzes__started_at__month=month)
#         return queryset


# @admin.register(QuizRankUser)
# class QuizRankUserAdmin(AjaxDatatable):
#     list_display = ('username_link', 'get_total_score', 'get_rank')
#     list_filter = (QuizFilter, QuizCategoryFilter, MonthFilter)
#     readonly_fields = ('date_joined', 'last_login') 


#     def get_queryset(self, request):
#         queryset = super().get_queryset(request)
        
#         quiz_id = request.GET.get('quiz')
#         category_id = request.GET.get('quiz_category')
#         month = request.GET.get('month')

#         filters = {}
#         if quiz_id:
#             filters['uquizzes__quiz_id'] = quiz_id
#         if category_id:
#             filters['uquizzes__quiz__category_id'] = category_id
#         if month:
#             month = int(month)
#             year = timezone.now().year
#             filters['uquizzes__started_at__year'] = year
#             filters['uquizzes__started_at__month'] = month

#         if filters:
#             queryset = queryset.filter(**filters)

#         users_scores = Participant.objects.filter(**{k.replace('uquizzes__', ''): v for k, v in filters.items()}).select_related('user').values(
#             username=Coalesce(F('user__username'), F('user__email'), output_field=CharField())
#         ).annotate(
#             score=Sum('total_score')
#         ).order_by('-score')

#         # Add rank to each user using window function
#         users_scores = users_scores.annotate(
#             rank=Window(
#                 expression=Rank(),
#                 order_by=F('score').desc()
#             )
#         ).order_by("rank")

#         user_scores_dict = {user['username']: user for user in users_scores}
#         for user in queryset:
#             user.score = user_scores_dict.get(user.username, {}).get('score', 0)
#             user.rank = user_scores_dict.get(user.username, {}).get('rank', 'N/A')
#         self.queryset = queryset
#         return queryset
    
#     def has_view_permission(self, request, obj=None):
#         return True

#     def has_change_permission(self, request, obj=None):
#         return False

#     def has_add_permission(self, request):
#         return False

#     def has_delete_permission(self, request, obj=None):
#         return False
    
#     def username_link(self, obj):
#         return format_html('<a href="/en/admin/account/clientuser/{}/change/">{}</a>', obj.id, obj.username)
#     username_link.short_description = 'Username'
#     username_link.admin_order_field = 'username'    
    
#     def get_total_score(self, obj):
#         for user in self.queryset:
#             if user.id == obj.id:
#                 return user.score
#     get_total_score.short_description = 'Total Score'

#     def get_rank(self, obj):
#         for user in self.queryset:
#             if user.id == obj.id:
#                 return user.rank
#     get_rank.short_description = 'Rank'