import { createRouter } from './create-router';
import { openaiError } from './errors';
import type { HonoVariables } from './create-router';
import type { Hono } from 'hono';
import { imagesRouter } from './api/images';
import { providersRouter } from './api/providers';
import { collectionsRouter } from './api/collections';
import { filesRouter } from './api/files';

/**
 * Every router this sidecar answers, and the prefix it answers on.
 *
 * Bare — no `/api` prefix of its own. `createSidecarProxy` (../api/router.ts, on the platform side)
 * already strips `/api/atelier` before forwarding, so what arrives here is exactly the subpath: a
 * request for `/api/atelier/images/generations` arrives as `/images/generations`.
 *
 * `ping` and `echo` from the standalone service are not here — they were smoke-test routes with no
 * caller; the sidecar's own `/_health` (see index.ts) covers liveness instead.
 */
const MOUNTS: [string, Hono<{ Variables: HonoVariables }>][] = [
  ['/images', imagesRouter],
  ['/providers', providersRouter],
  ['/collections', collectionsRouter],
  ['/files', filesRouter],
];

export function buildHonoApp() {
  const app = createRouter();

  for (const [prefix, router] of MOUNTS) app.route(prefix, router);

  app.notFound((ctx) => ctx.json(openaiError('Not found', 'not_found'), 404));

  app.onError((error, ctx) => {
    console.error('[atelier]', error);
    return ctx.json(openaiError('Internal Server Error', 'server_error'), 500);
  });

  return app;
}