from typing import Any

from django.contrib import admin
from django.http import HttpRequest
from django.utils.html import format_html

from .models import DBTaskResult


@admin.register(DBTaskResult)
class DBTaskResultAdmin(admin.ModelAdmin):
    list_display = (
        "id",
        "task_name",
        "status",
        "enqueued_at",
        "started_at",
        "finished_at",
        "priority",
        "queue_name",
    )
    list_filter = ("status", "priority", "queue_name")
    ordering = ["-enqueued_at"]

    def has_add_permission(
        self, request: HttpRequest, obj: DBTaskResult | None = None
    ) -> bool:
        return False

    def has_delete_permission(
        self, request: HttpRequest, obj: DBTaskResult | None = None
    ) -> bool:
        return False

    def has_change_permission(
        self, request: HttpRequest, obj: DBTaskResult | None = None
    ) -> bool:
        return False

    def get_readonly_fields(
        self, request: HttpRequest, obj: DBTaskResult | None = None
    ) -> list[str]:
        fields = [f.name for f in self.model._meta.fields]
        fields[fields.index("traceback")] = "formatted_traceback"
        return fields

    def get_fields(
        self, request: HttpRequest, obj: DBTaskResult | None = None
    ) -> list[Any]:
        return self.get_readonly_fields(request, obj)

    @admin.display(description="traceback")
    def formatted_traceback(self, obj: DBTaskResult) -> str:
        if not obj.traceback:
            return "-"
        return format_html(
            "<pre>{}</pre>",
            obj.traceback,
        )