import { Activity, Database, ListChecks, Wrench } from "lucide-react";
import type { Observability } from "@/services/agenticApi";
import { EmptyState, ErrorState, LoadingState } from "./AnalysisStates";

interface ObservabilityPanelProps {
  observability: Observability | null;
  loading?: boolean;
  error?: string | null;
}

export function ObservabilityPanel({ observability, loading, error }: ObservabilityPanelProps) {
  if (loading) return <LoadingState label="Loading observability" />;
  if (error) return <ErrorState title="Observability unavailable" message={error} />;
  if (!observability) return <EmptyState title="No observability yet" description="It appears after an AI answer completes." />;

  return (
    <section className="space-y-4">
      <div className="flex items-center gap-2">
        <Activity className="h-4 w-4 text-slate-600" />
        <h3 className="text-sm font-semibold text-slate-900">Observability</h3>
      </div>

      {observability.planning && (
        <div className="rounded-lg border border-slate-200 bg-white p-3">
          <div className="mb-2 flex items-center gap-2 text-xs font-semibold uppercase tracking-wide text-slate-500">
            <ListChecks className="h-3.5 w-3.5" /> Planning
          </div>
          {observability.planning.goal_restated && <p className="text-sm leading-6 text-slate-700">{observability.planning.goal_restated}</p>}
          {observability.planning.steps && observability.planning.steps.length > 0 && (
            <ol className="mt-2 space-y-1 text-xs text-slate-600">
              {observability.planning.steps.map((step, index) => (
                <li key={`${step.stage}-${index}`}>{step.step ?? index + 1}. {step.objective ?? step.stage}</li>
              ))}
            </ol>
          )}
        </div>
      )}

      {observability.thinking && (
        <div className="rounded-lg border border-slate-200 bg-white p-3">
          <p className="text-xs font-semibold uppercase tracking-wide text-slate-500">Thinking summary</p>
          <p className="mt-2 text-sm leading-6 text-slate-700">{observability.thinking}</p>
        </div>
      )}

      <div className="rounded-lg border border-slate-200 bg-white p-3">
        <div className="mb-2 flex items-center gap-2 text-xs font-semibold uppercase tracking-wide text-slate-500">
          <Wrench className="h-3.5 w-3.5" /> Tool calls
        </div>
        {observability.tool_calls.length === 0 ? (
          <p className="text-xs text-slate-500">No tools were used.</p>
        ) : (
          <div className="space-y-2">
            {observability.tool_calls.map((tool, index) => (
              <div key={`${tool.name}-${index}`} className="rounded-md bg-slate-50 px-3 py-2">
                <p className="text-sm font-medium text-slate-800">{tool.name}</p>
                <p className="text-xs text-slate-500">{tool.status ?? "completed"}</p>
              </div>
            ))}
          </div>
        )}
      </div>

      <div className="rounded-lg border border-slate-200 bg-white p-3">
        <div className="mb-2 flex items-center gap-2 text-xs font-semibold uppercase tracking-wide text-slate-500">
          <Database className="h-3.5 w-3.5" /> Sources
        </div>
        {observability.sources.length === 0 ? (
          <p className="text-xs text-slate-500">No sources attached.</p>
        ) : (
          <pre className="max-h-44 overflow-auto rounded-md bg-slate-950 p-3 text-[11px] leading-5 text-slate-100">
            {JSON.stringify(observability.sources, null, 2)}
          </pre>
        )}
      </div>
    </section>
  );
}