from django.contrib import admin
from django.urls import reverse
from django.utils.html import format_html

from apps.catalog.models import Brand, Product

from .models import AuditLog, ModerationRequest


@admin.register(ModerationRequest)
class ModerationRequestAdmin(admin.ModelAdmin):
    list_display = (
        'get_entity_name', 'get_user', 'get_story', 'get_link',
        'decision', 'moderator', 'created_at', 'decided_at',
    )
    list_filter = ('decision', 'content_type')
    search_fields = ('comment', 'user__username', 'user__full_name')
    readonly_fields = (
        'get_entity_name', 'get_user', 'get_story', 'get_link',
        'created_at', 'decided_at',
    )

    @admin.display(description='Сущность')
    def get_entity_name(self, obj):
        entity = obj.entity
        return str(entity) if entity else f'#{obj.object_id}'

    @admin.display(description='Пользователь')
    def get_user(self, obj):
        """Пользователь из поля user, либо выводимый из сущности."""
        if obj.user:
            return obj.user
        entity = obj.entity
        if entity is None:
            return None
        for attr in ('user', 'author'):
            if hasattr(entity, attr):
                return getattr(entity, attr)
        if hasattr(entity, 'brand'):
            return entity.brand.user
        return None

    @admin.display(description='Описание деятельности')
    def get_story(self, obj):
        entity = obj.entity
        story = getattr(entity, 'story', '') or ''
        return story[:80] + ('…' if len(story) > 80 else '')

    @admin.display(description='Страница карточки')
    def get_link(self, obj):
        entity = obj.entity
        if entity is None:
            return '-'
        if isinstance(entity, Brand):
            url = reverse('catalog:brand_detail', args=[entity.slug])
        elif isinstance(entity, Product):
            url = reverse('catalog:product_detail', args=[entity.slug])
        else:
            return '-'
        return format_html('<a href="{}" target="_blank">Открыть карточку</a>', url)


@admin.register(AuditLog)
class AuditLogAdmin(admin.ModelAdmin):
    list_display = ('created_at', 'user', 'action', 'object_repr')
    list_filter = ('action',)
    search_fields = ('action', 'object_repr')
    readonly_fields = ('created_at',)