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.db import models
from django_ckeditor_5.widgets import CKEditor5Widget

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


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

class BaseContentAdmin(admin.ModelAdmin):
    """
    Базовый класс для контентных моделей.
    CKEditor, actions публикации, date_hierarchy.
    """
    list_display_links = ('id', 'title')
    list_editable = ('is_published',)
    list_filter = ('time_create', 'is_published')
    search_fields = ('title',)
    date_hierarchy = 'time_create'
    actions = ['make_published', 'make_unpublished']
    readonly_fields = ('time_create', 'time_update')

    formfield_overrides = {
        models.TextField: {'widget': CKEditor5Widget(config_name='default')},
    }

    def make_published(self, request, queryset):
        updated = queryset.update(is_published=True)
        self.message_user(request, f'{updated} объектов опубликовано.')
    make_published.short_description = 'Опубликовать выбранные'

    def make_unpublished(self, request, queryset):
        updated = queryset.update(is_published=False)
        self.message_user(request, f'{updated} объектов снято с публикации.')
    make_unpublished.short_description = 'Снять с публикации'


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

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

    fieldsets = (
        (None, {
            'fields': ('title', 'is_published'),
        }),
        ('Содержание', {
            'fields': ('content', 'home_image'),
            'description': 'Основной текст главной страницы.',
        }),
        ('Служебное', {
            'fields': ('time_create', 'time_update'),
            'classes': ('collapse',),
        }),
    )


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

    fieldsets = (
        (None, {
            'fields': ('title', 'is_published'),
        }),
        ('Содержание', {
            'fields': ('description', 'implementation', 'closing'),
            'description': 'Описание, реализация и заключение по проекту.',
        }),
        ('Служебное', {
            'fields': ('time_create', 'time_update'),
            'classes': ('collapse',),
        }),
    )


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

    fieldsets = (
        (None, {
            'fields': ('title', 'is_published'),
        }),
        ('Содержание', {
            'fields': ('content', 'photo'),
            'description': 'Описание компетенции и фото.',
        }),
        ('Служебное', {
            'fields': ('time_create', 'time_update'),
            'classes': ('collapse',),
        }),
    )


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

    fieldsets = (
        (None, {
            'fields': ('title', 'is_published'),
        }),
        ('Содержание', {
            'fields': ('content', 'scan', 'scan_preview'),
            'description': 'Текст отзыва и скан документа.',
        }),
        ('Служебное', {
            'fields': ('time_create', 'time_update'),
            'classes': ('collapse',),
        }),
    )
    readonly_fields = ('time_create', 'time_update', 'scan_preview')

    def scan_preview(self, obj):
        if obj.scan:
            return format_html(
                '<img src="{}" style="max-height:200px; max-width:400px; '
                'border-radius:4px; border:1px solid #ddd;" />',
                obj.scan.url
            )
        return '—'
    scan_preview.short_description = 'Превью скана'


# ===== CALLBACK =====

@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']

    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'

    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'

    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)


# ===== PAGE VIEWS =====

@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')

    def has_add_permission(self, request):
        return False

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