from django.contrib import admin
from django.utils.html import format_html
from django.shortcuts import render
from django_ckeditor_5.widgets import CKEditor5Widget
from .models import ProductCategory, Configuration, Product, Order
from programmer.utils.email_notifications import send_multiple_order_notifications, send_multiple_order_notifications_async
from django.urls import reverse
from programmer.tasks import send_new_product_notification
from django.contrib import messages


@admin.register(ProductCategory)
class ProductCategoryAdmin(admin.ModelAdmin):
    list_display = ('name', 'slug', 'description')
    prepopulated_fields = {'slug': ('name',)}
    search_fields = ('name',)


@admin.register(Configuration)
class ConfigurationAdmin(admin.ModelAdmin):
    list_display = ('name', 'slug', 'description')
    prepopulated_fields = {'slug': ('name',)}
    search_fields = ('name',)


@admin.register(Product)
class ProductAdmin(admin.ModelAdmin):

    def get_form(self, request, obj=None, **kwargs):
        form = super().get_form(request, obj, **kwargs)
        form.base_fields['content'].widget = CKEditor5Widget(config_name='default')
        return form

    list_display = ('title', 'category', 'price', 'is_published', 'time_create', 'configurations_list')
    list_filter = ('is_published', 'category', 'configurations', 'time_create')
    search_fields = ('title', 'short_description', 'content')
    prepopulated_fields = {'slug': ('title',)}
    filter_horizontal = ('configurations',)
    date_hierarchy = 'time_create'
    actions = ['make_published', 'make_unpublished', 'send_notification']

    fieldsets = (
        (None, {
            'fields': ('title', 'slug', 'category', 'price', 'is_published')
        }),
        ('Описания', {
            'fields': ('short_description', 'content', 'image'),
            'description': 'Краткое – обычный текст для карточки; полное – HTML-редактор для детальной страницы.'
        }),
        ('Совместимость', {
            'fields': ('configurations',),
        }),
        ('SEO', {
            'fields': ('meta_description',),
            'classes': ('collapse',),
        }),
    )

    def configurations_list(self, obj):
        return ", ".join(c.name for c in obj.configurations.all())
    configurations_list.short_description = "Конфигурации"

    def view_on_site(self, obj):
        if obj.is_published:
            return obj.get_absolute_url()
        # Для неопубликованных — ссылка на предпросмотр
        return reverse('products:product_draft_preview', args=[obj.slug])

    def make_published(self, request, queryset):
        queryset.update(is_published=True)
    make_published.short_description = "Опубликовать выбранные продукты"

    def make_unpublished(self, request, queryset):
        queryset.update(is_published=False)
    make_unpublished.short_description = "Снять с публикации"

    def send_notification(self, request, queryset):
        """Отправить уведомления подписчикам для выбранных продуктов."""
        published = queryset.filter(is_published=True)
        count = published.count()
        if count == 0:
            self.message_user(request, "Нет опубликованных продуктов для отправки уведомлений.", level=messages.WARNING)
            return

        for product in published:
            send_new_product_notification.delay(product.id)

        self.message_user(request, f"Уведомления отправлены для {count} продуктов.")
    send_notification.short_description = "Отправить уведомление подписчикам о новых продуктах"


@admin.register(Order)
class OrderAdmin(admin.ModelAdmin):
    list_display = ('id', 'product', 'name', 'phone', 'created_at', 'is_processed', 'notification_sent')
    list_filter = ('is_processed', 'product', 'configuration', 'notification_sent')
    search_fields = ('name', 'phone', 'email')
    list_editable = ('is_processed',)
    readonly_fields = ('created_at',)
    actions = ['resend_order_notification']  # добавляем действие в выпадающий список

    def notification_badge(self, obj):
        # Если в модели Order добавите поле notification_sent, можно показывать иконку
        # Пока просто заглушка – всегда зелёная галочка (уведомление считается отправленным при создании)
        return format_html('<span style="color:green;">✓</span>')
    notification_badge.short_description = 'Уведомление'

    def resend_order_notification(self, request, queryset):
        """
        Переотправляет уведомления для выбранных заказов.
        """
        # count = send_multiple_order_notifications(queryset)
        count = send_multiple_order_notifications_async(queryset)
        self.message_user(request, f'Уведомления отправлены для {count} заказов.')
    resend_order_notification.short_description = 'Переотправить email уведомления'

    # Опционально: добавить кастомную кнопку на страницу списка
    def get_urls(self):
        from django.urls import path
        from django.shortcuts import render
        from django.contrib import messages

        urls = super().get_urls()
        custom_urls = [
            path(
                'order-stats/',
                self.admin_site.admin_view(self.order_stats_view),
                name='order_stats',
            ),
        ]
        return custom_urls + urls
    

    def notification_badge(self, obj):
        if obj.notification_sent:
            return format_html('<span style="color:green;">✓</span>')
        return format_html('<span style="color:red;">✗</span>')
    

    def order_stats_view(self, request):
        from .models import Order
        from django.utils import timezone
        today = timezone.now().date()
        week_ago = today - timezone.timedelta(days=7)

        stats = {
            'total': Order.objects.count(),
            'today': Order.objects.filter(created_at__date=today).count(),
            'week': Order.objects.filter(created_at__date__gte=week_ago).count(),
            'unprocessed': Order.objects.filter(is_processed=False).count(),
        }
        context = {
            **self.admin_site.each_context(request),
            'title': 'Статистика заказов',
            'stats': stats,
        }
        return render(request, 'admin/order_stats.html', context)