# from django.contrib import admin

# from apps.course.models import Participant
# from apps.account.models import StudentUser, User



# @admin.register(Participant)
# class ParticipantAdmin(admin.ModelAdmin):
#     list_display = ('student', 'course', 'joined_date', 'unread_messages_count')
#     search_fields = ('student__fullname', 'student__email', 'course__title')
#     list_filter = ('course', 'joined_date')
#     ordering = ('-joined_date',)
#     autocomplete_fields = ['student',]  # جستجوی پویا برای فیلد دانش‌آموز

#     def get_readonly_fields(self, request, obj=None):
#         """
#         Make fields readonly if the object already exists.
#         """
#         if obj:  
#             return ['student', 'course', 'joined_date']
#         return []
    
    
#     def get_form(self, request, obj=None, **kwargs):
#         form = super().get_form(request, obj, **kwargs)
#         if obj is None:  # Adding a new participant
#             # محدود کردن انتخاب دانش‌آموزان به کاربرانی که از نوع StudentUser هستند
#             # form.base_fields['student'].queryset = StudentUser.objects.filter(user_type=User.UserType.STUDENT)
#             form.base_fields['student'].widget.can_add_related = True  # فعال کردن دکمه اضافه کردن
 
#         return form