from django.contrib import admin
from django.utils import timezone
from django.utils.html import format_html
from django.urls import path
from django.shortcuts import render
from django.contrib import messages

from .models import Home, Solution, Competence, Recall, CallbackRequest, PageView


# ===== BASE ADMIN CLASSES =====

class BaseContentAdmin(admin.ModelAdmin):
    """Общий базовый класс для контентных моделей."""
    list_display_links = ('id', 'title')
    list_editable = ('is_published',)
    list_filter = ('time_create', 'is_published')
    search_fields = ('title',)


# ===== MODEL ADMINS =====

@admin.register(Home)
class HomeAdmin(BaseContentAdmin):
    list_display = ('id', 'title', 'time_create', 'is_published')
    search_fields = ('title', 'content')


@admin.register(Solution)
class SolutionAdmin(BaseContentAdmin):
    list_display = ('id', 'title', 'time_create', 'is_published')
    search_fields = ('title', 'description', 'implementation')


@admin.register(Competence)
class CompetenceAdmin(BaseContentAdmin):
    list_display = ('id', 'title', 'time_create', 'is_published')
    search_fields = ('title', 'content')


@admin.register(Recall)
class RecallAdmin(BaseContentAdmin):
    list_display = ('id', 'title', 'time_create', 'scan', 'is_published')
    search_fields = ('title', 'content')


@admin.register(CallbackRequest)
class CallbackAdmin(admin.ModelAdmin):
    list_display = ('name', 'phone', 'email', 'time_create', 'is_processed', 'is_read', 'new_badge')
    list_display_links = ('name', 'phone')
    list_editable = ('is_processed', 'is_read')
    list_filter = ('time_create', 'is_processed', 'is_read')
    search_fields = ('name', 'phone', 'email')
    readonly_fields = ('time_create',)
    actions = ['mark_as_read', 'mark_as_unread', 'mark_as_processed', 'resend_notification']

    # ── badge helper ──────────────────────────────────────────────────────────

    def new_badge(self, obj):
        if not obj.is_read:
            return format_html('<span style="color:red;font-weight:bold;">🆕 НОВАЯ</span>')
        return ''
    new_badge.short_description = 'Статус'

    # ── bulk actions ──────────────────────────────────────────────────────────

    def mark_as_read(self, request, queryset):
        updated = queryset.update(is_read=True)
        self.message_user(request, f'{updated} заявок отмечены как прочитанные')
    mark_as_read.short_description = 'Отметить как прочитанные'

    def mark_as_unread(self, request, queryset):
        updated = queryset.update(is_read=False)
        self.message_user(request, f'{updated} заявок отмечены как непрочитанные')
    mark_as_unread.short_description = 'Отметить как непрочитанные'

    def mark_as_processed(self, request, queryset):
        updated = queryset.update(is_processed=True)
        self.message_user(request, f'{updated} заявок отмечены как обработанные')
    mark_as_processed.short_description = 'Отметить как обработанные'

    def resend_notification(self, request, queryset):
        from .utils.email_notifications import send_multiple_callback_notifications
        count = send_multiple_callback_notifications(queryset)
        self.message_user(request, f'Уведомления отправлены для {count} заявок')
    resend_notification.short_description = 'Переотправить email уведомления'

    # ── custom URL + view for stats ───────────────────────────────────────────

    def get_urls(self):
        urls = super().get_urls()
        custom_urls = [
            path(
                'callback-stats/',
                self.admin_site.admin_view(self.callback_stats_view),
                name='callback_stats',
            ),
        ]
        return custom_urls + urls

    def callback_stats_view(self, request):
        today = timezone.now().date()
        week_ago = today - timezone.timedelta(days=7)

        stats = {
            'total': CallbackRequest.objects.count(),
            'today': CallbackRequest.objects.filter(time_create__date=today).count(),
            'week': CallbackRequest.objects.filter(time_create__date__gte=week_ago).count(),
            'unread': CallbackRequest.objects.filter(is_read=False).count(),
            'unprocessed': CallbackRequest.objects.filter(is_processed=False).count(),
        }

        context = {
            **self.admin_site.each_context(request),
            'title': 'Статистика заявок',
            'stats': stats,
        }
        return render(request, 'admin/callback_stats.html', context)

    # ── FIX: removed get_queryset message_user spam ───────────────────────────
    # Previously, a warning banner was shown on EVERY request to the changelist,
    # including background requests. Removed entirely — the new_badge column
    # and base_site.html header notification already surface unread counts.


@admin.register(PageView)
class PageViewAdmin(admin.ModelAdmin):
    list_display = ('url', 'timestamp', 'ip_address')
    list_filter = ('timestamp', 'url')
    search_fields = ('url', 'ip_address')
    date_hierarchy = 'timestamp'
    readonly_fields = ('url', 'timestamp', 'ip_address')

    def get_queryset(self, request):
        return super().get_queryset(request).order_by('-timestamp')

    # PageViews should never be created or edited manually
    def has_add_permission(self, request):
        return False

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