from django.contrib import admin
from django.utils.html import format_html
from .models import SlugHistory


@admin.register(SlugHistory)
class SlugHistoryAdmin(admin.ModelAdmin):
    list_display = ["content_object_link", "old_slug", "created_at"]
    list_filter = ["content_type", "created_at"]
    search_fields = ["old_slug", "object_id"]
    readonly_fields = ["content_type", "object_id", "old_slug", "created_at"]
    date_hierarchy = "created_at"
    ordering = ["-created_at"]

    def content_object_link(self, obj):
        """Create a link to the related object's admin page"""
        try:
            url = obj.content_object.get_absolute_url()
            return format_html('<a href="{}">{}</a>', url, str(obj.content_object))
        except (AttributeError, ValueError):
            return str(obj.content_object)

    content_object_link.short_description = "Object"

    def has_add_permission(self, request):
        """Disable manual creation of slug history records"""
        return False

    def has_change_permission(self, request, obj=None):
        """Disable editing of slug history records"""
        return False