Dovodi_Backend/apps/course/admin/lesson.py

import os
from django.contrib import admin
from django import forms
from django.utils.translation import gettext_lazy as _
from django.db import models
from django.utils.html import format_html

from unfold.admin import ModelAdmin
from unfold.decorators import display
from unfold.contrib.forms.widgets import WysiwygWidget
from unfold.contrib.filters.admin import (
    ChoicesDropdownFilter,
    MultipleRelatedDropdownFilter,
)
from unfold.widgets import (
    UnfoldAdminRadioSelectWidget,
)

from utils.admin import project_admin_site
from .professor_base import CourseRelatedAdmin
from apps.course.models.lesson import Lesson, CourseLesson, LessonCompletion
from unfold.admin import ModelAdmin, StackedInline, TabularInline


class LessonForm(forms.ModelForm):
    class Meta:
        model = Lesson
        fields = '__all__'
        widgets = {
            'content_type': UnfoldAdminRadioSelectWidget(),
        }


class CourseLessonForm(forms.ModelForm):
    class Meta:
        model = CourseLesson
        fields = '__all__'


class LessonAdmin(ModelAdmin):
    form = LessonForm
    list_display = ('title', 'display_duration', 'content_type')
    list_filter = (
        ('content_type', ChoicesDropdownFilter),
    )
    search_fields = ('title',)
    ordering = ('title',)
    list_filter_submit = True
    radio_fields = {
        "content_type": admin.HORIZONTAL,
    }
    conditional_fields = {
        'content_file': "content_type == 'video_file'",
        'video_link': "content_type == 'youtube_link'",
    }

    fieldsets = (
        (None, {
            'fields': ('title', 'duration')
        }),
        (_('Content'), {
            'fields': ('content_type', 'content_file', 'video_link'),
            'classes': [],
        }),
    )

    def get_form(self, request, obj=None, change=False, **kwargs):
        form = super().get_form(request, obj, change, **kwargs)

        # Enhanced styling for content_type radio buttons
        form.base_fields["content_type"].widget = UnfoldAdminRadioSelectWidget(
            choices=Lesson.ContentTypeChoices.choices,
            radio_style=admin.HORIZONTAL,
            attrs={
                "class": "radio-inline flex gap-4 p-2 rounded-lg bg-gray-50 shadow-sm",
                "option_class": "flex items-center p-2 rounded-md hover:bg-white hover:shadow-sm transition-all duration-200",
                "label_class": "ml-2 font-medium text-gray-700 cursor-pointer",
                "input_class": "form-radio h-5 w-5 text-blue-600 transition duration-150 ease-in-out cursor-pointer",
            },
        )

        return form

    @display(description=_("Duration"))
    def display_duration(self, obj):
        return format_html(
            '<span class="badge badge-info">{} min</span>',
            obj.duration
        )


class CourseLessonAdmin(CourseRelatedAdmin):
    form = CourseLessonForm
    list_display = ('title', 'course', 'display_duration', 'is_active', 'priority')
    list_filter = (
        ('course', MultipleRelatedDropdownFilter),
        'is_active',
    )
    search_fields = ('title', 'course__title')
    ordering = ('course', 'priority')
    autocomplete_fields = ('course', 'lesson')
    list_filter_submit = True

    fieldsets = (
        (None, {
            'fields': ('course', 'lesson', 'title', 'priority', 'is_active')
        }),
    )

    @display(description=_("Duration"))
    def display_duration(self, obj):
        return format_html(
            '<span class="badge badge-info">{} min</span>',
            obj.lesson.duration
        )

    def get_queryset(self, request):
        qs = super().get_queryset(request)
        return qs.order_by('course', 'priority')


class LessonCompletionAdmin(ModelAdmin):
    list_display = ('student', 'course_lesson', 'completed_at')
    search_fields = ('student__fullname', 'student__email', 'course_lesson__title', 'course_lesson__course__title')
    list_filter = ('course_lesson__course', 'completed_at')
    ordering = ('-completed_at',)

    def get_readonly_fields(self, request, obj=None):
        """
        Make fields readonly if the object already exists.
        """
        if obj:
            return ['student', 'course_lesson', 'completed_at']
        return []


# Register with both admin sites for autocomplete support
from django.contrib import admin as django_admin
django_admin.site.register(Lesson, LessonAdmin)

# Register with the project admin site
project_admin_site.register(Lesson, LessonAdmin)
project_admin_site.register(CourseLesson, CourseLessonAdmin)
project_admin_site.register(LessonCompletion, LessonCompletionAdmin)