import { useQuery } from '@tanstack/react-query';
import { useSearchParams } from 'react-router-dom';
import { api, type HarnessRunRecord } from '../lib/api';
import { Card, StatusBadge } from '../components/ui/Card';
import { TraceExplorer } from '../components/trace/TraceExplorer';

export function Runs() {
  const { data, isLoading } = useQuery({ queryKey: ['runs'], queryFn: () => api.runs(100) });
  const [searchParams, setSearchParams] = useSearchParams();
  const selectedTrace = searchParams.get('trace') ?? '';

  if (isLoading || !data) return <div className="text-slate-500">Loading…</div>;
  return (
    <div className="space-y-5">
      {selectedTrace && <TraceExplorer traceId={selectedTrace} onClose={() => setSearchParams({})} />}
      <Card
        title={`Recent runs (${data.count})`}
        right={<span className="text-xs font-normal normal-case tracking-normal text-slate-400">Select a run to inspect H1–H7</span>}
      >
        <div className="overflow-x-auto">
          <table className="w-full text-sm">
            <thead><tr className="border-b border-slate-200 text-left text-slate-500">
              <th className="py-2">time</th><th>step</th><th>status</th><th>latency</th><th>tokens</th><th>cost</th><th className="text-right">trace</th>
            </tr></thead>
            <tbody>
              {data.runs.map((run: HarnessRunRecord, index: number) => (
                <tr key={`${run.trace_id ?? 'run'}-${index}`} className="border-b border-slate-100 transition-colors hover:bg-slate-50/80">
                  <td className="py-2 text-slate-500">{run.timestamp?.replace('T', ' ').replace('Z', '')}</td>
                  <td className="text-slate-700">{run.step ?? run.harness}</td>
                  <td><StatusBadge value={run.status ?? '—'} /></td>
                  <td>{run.latency_ms ?? '—'} ms</td>
                  <td>{run.total_tokens ?? '—'}</td>
                  <td>{run.cost_estimate == null ? <span className="font-medium text-amber-600">Unavailable</span> : `$${Number(run.cost_estimate).toFixed(5)}`}</td>
                  <td className="py-2 text-right">
                    {run.trace_id ? (
                      <button
                        type="button"
                        onClick={() => setSearchParams({ trace: run.trace_id ?? '' })}
                        className="rounded-lg border border-blue-200 bg-blue-50 px-3 py-1.5 text-xs font-semibold text-blue-700 transition-colors hover:bg-blue-100"
                      >
                        Open H1–H7
                      </button>
                    ) : <span className="text-slate-300">—</span>}
                  </td>
                </tr>
              ))}
            </tbody>
          </table>
        </div>
      </Card>
    </div>
  );
}