"""
Admin для упрощенной системы уведомлений
"""

from django.contrib import admin
from django.utils.html import format_html
from django.utils.safestring import mark_safe
from .models import Notification, UserChannelPreferences


@admin.register(Notification)
class NotificationAdmin(admin.ModelAdmin):
    """Admin для модели Notification"""

    list_display = [
        "id",
        "get_actor_display",
        "verb",
        "get_recipient_display",
        "unread",
        "public",
        "deleted",
        "emailed",
        "timestamp",
    ]

    list_filter = [
        "unread",
        "public",
        "deleted",
        "emailed",
        "verb",
        "timestamp",
    ]

    search_fields = [
        "recipient__username",
        "recipient__first_name",
        "recipient__last_name",
        "recipient__email",
        "verb",
        "description",
    ]

    readonly_fields = [
        "get_actor_info",
        "get_action_object_info",
        "get_target_info",
        "timestamp",
        "timestamp_read",
    ]

    fieldsets = (
        (
            "Основная информация",
            {
                "fields": (
                    "recipient",
                    "verb",
                    "description",
                    "action_url",
                )
            },
        ),
        (
            "Связанные объекты",
            {
                "fields": (
                    "get_actor_info",
                    "get_action_object_info",
                    "get_target_info",
                ),
                "classes": ("collapse",),
            },
        ),
        (
            "Дополнительные данные",
            {
                "fields": ("data",),
                "classes": ("collapse",),
            },
        ),
        (
            "Статусы",
            {
                "fields": (
                    "unread",
                    "timestamp_read",
                    "public",
                    "deleted",
                    "emailed",
                )
            },
        ),
        ("Временные метки", {"fields": ("timestamp",)}),
    )

    date_hierarchy = "timestamp"

    actions = [
        "mark_as_read",
        "mark_as_unread",
        "mark_as_deleted",
        "mark_as_not_deleted",
    ]

    def get_actor_display(self, obj):
        """Отображение актора в списке"""
        if obj.actor:
            return format_html(
                '<span title="{}">{}</span>',
                obj.actor_content_type.model,
                str(obj.actor)[:50],
            )
        return "-"

    get_actor_display.short_description = "Актор"

    def get_recipient_display(self, obj):
        """Отображение получателя"""
        return format_html(
            '<a href="/admin/employees/employee/{}/change/">{}</a>',
            obj.recipient.id,
            obj.recipient.get_short_name(),
        )

    get_recipient_display.short_description = "Получатель"

    def get_actor_info(self, obj):
        """Подробная информация об акторе"""
        if not obj.actor:
            return "-"

        info = f"""
        <strong>Тип:</strong> {obj.actor_content_type.model}<br>
        <strong>ID:</strong> {obj.actor_object_id}<br>
        <strong>Объект:</strong> {obj.actor}
        """
        return mark_safe(info)

    get_actor_info.short_description = "Информация об акторе"

    def get_action_object_info(self, obj):
        """Подробная информация об объекте действия"""
        if not obj.action_object:
            return "-"

        info = f"""
        <strong>Тип:</strong> {obj.action_object_content_type.model}<br>
        <strong>ID:</strong> {obj.action_object_object_id}<br>
        <strong>Объект:</strong> {obj.action_object}
        """
        return mark_safe(info)

    get_action_object_info.short_description = "Объект действия"

    def get_target_info(self, obj):
        """Подробная информация о целевом объекте"""
        if not obj.target:
            return "-"

        info = f"""
        <strong>Тип:</strong> {obj.target_content_type.model}<br>
        <strong>ID:</strong> {obj.target_object_id}<br>
        <strong>Объект:</strong> {obj.target}
        """
        return mark_safe(info)

    get_target_info.short_description = "Целевой объект"

    # === Actions ===

    @admin.action(description="Отметить как прочитанные")
    def mark_as_read(self, request, queryset):
        """Отметить выбранные уведомления как прочитанные"""
        count = 0
        for notification in queryset:
            if notification.unread:
                notification.mark_as_read()
                count += 1

        self.message_user(
            request, f"Отмечено как прочитанные: {count} уведомлений"
        )

    @admin.action(description="Отметить как непрочитанные")
    def mark_as_unread(self, request, queryset):
        """Отметить выбранные уведомления как непрочитанные"""
        count = 0
        for notification in queryset:
            if not notification.unread:
                notification.mark_as_unread()
                count += 1

        self.message_user(
            request, f"Отмечено как непрочитанные: {count} уведомлений"
        )

    @admin.action(description="Пометить как удаленные")
    def mark_as_deleted(self, request, queryset):
        """Пометить как удаленные (мягкое удаление)"""
        count = queryset.filter(deleted=False).update(deleted=True)
        self.message_user(
            request, f"Помечено как удаленные: {count} уведомлений"
        )

    @admin.action(description="Восстановить удаленные")
    def mark_as_not_deleted(self, request, queryset):
        """Восстановить удаленные"""
        count = queryset.filter(deleted=True).update(deleted=False)
        self.message_user(request, f"Восстановлено: {count} уведомлений")


@admin.register(UserChannelPreferences)
class UserChannelPreferencesAdmin(admin.ModelAdmin):
    """Admin для настроек каналов пользователя"""

    list_display = [
        "user",
        "web_enabled",
        "email_enabled",
        "push_enabled",
        "email_frequency",
        "dnd_enabled",
        "get_disabled_verbs_count",
    ]

    list_filter = [
        "web_enabled",
        "email_enabled",
        "push_enabled",
        "email_frequency",
        "dnd_enabled",
    ]

    search_fields = [
        "user__username",
        "user__first_name",
        "user__last_name",
        "user__email",
    ]

    fieldsets = (
        ("Пользователь", {"fields": ("user",)}),
        (
            "Каналы доставки",
            {
                "fields": (
                    "web_enabled",
                    "email_enabled",
                    "push_enabled",
                )
            },
        ),
        ("Email настройки", {"fields": ("email_frequency",)}),
        (
            'Режим "Не беспокоить"',
            {
                "fields": (
                    "dnd_enabled",
                    "dnd_start_time",
                    "dnd_end_time",
                )
            },
        ),
        (
            "Фильтры",
            {
                "fields": ("disabled_verbs",),
                "classes": ("collapse",),
            },
        ),
    )

    readonly_fields = []

    def get_disabled_verbs_count(self, obj):
        """Количество отключенных типов"""
        count = len(obj.disabled_verbs)
        if count == 0:
            return "-"
        return format_html(
            '<span title="{}">{} типов</span>',
            ", ".join(obj.disabled_verbs),
            count,
        )

    get_disabled_verbs_count.short_description = "Отключено типов"