Local Models (Chrome + Edge)

import { useMemo, useState } from 'react';
import { s } from '@hashbrownai/core';
import { experimental_local } from '@hashbrownai/core/transport';
import { useStructuredCompletion } from '@hashbrownai/react';

const ItinerarySchema = s.object('2-day plan', {
  city: s.string('Destination city'),
  days: s.streaming.array(
    'List of days',
    s.object('Day', {
      title: s.streaming.string('Title'),
      highlights: s.streaming.array(
        'Top things to do',
        s.streaming.string('Activity'),
      ),
    }),
  ),
});

export function LocalItinerary() {
  const [city, setCity] = useState('Lisbon');
  const [availability, setAvailability] = useState<string | null>(null);
  const [downloadRequired, setDownloadRequired] = useState(false);
  const [downloadProgress, setDownloadProgress] = useState<number | null>(null);

  const input = useMemo(
    () => (city ? `Plan a concise two-day itinerary for ${city}.` : null),
    [city],
  );

  const { output, error, isSending, reload } = useStructuredCompletion({
    debugName: 'local-itinerary-react',
    input,
    system: 'Return a two-day itinerary as JSON that matches the schema.',
    schema: ItinerarySchema,
    model: [
      experimental_local({
        events: {
          availability: setAvailability,
          downloadRequired: () => setDownloadRequired(true),
          downloadProgress: setDownloadProgress,
        },
      }),
      'gpt-5-mini', // cloud fallback
    ],
  });

  return (
    <section style={{ display: 'grid', gap: 12, maxWidth: 520 }}>
      <div>
        <label style={{ display: 'block', fontWeight: 600 }}>Destination</label>
        <input
          value={city}
          onChange={(e) => setCity(e.target.value)}
          placeholder="Lisbon"
        />
      </div>

      <div style={{ fontSize: 14, color: '#555' }}>
        <div>Availability: {availability ?? 'checking...'}</div>
        {downloadRequired && (
          <div>Download required (triggered on first prompt)</div>
        )}
        {downloadProgress !== null && <div>Download: {downloadProgress}%</div>}
      </div>

      <button onClick={reload} disabled={isSending}>
        {isSending ? 'Generating...' : 'Generate locally'}
      </button>

      {output && (
        <pre style={{ background: '#0f172a', color: '#f8fafc', padding: 12 }}>
          {JSON.stringify(output, null, 2)}
        </pre>
      )}

      {error && <div style={{ color: 'crimson' }}>Error: {error.message}</div>}
    </section>
  );
}