/**
 * llmindex.io — GET /api/v1/methodology (machine-readable weights + IRT hyperparams)
 * Author:  Simon-Pierre Boucher
 * Contact: contact@spboucher.ai
 * License: Proprietary — © Simon-Pierre Boucher, all rights reserved
 */
import { type NextRequest } from 'next/server';
import {
  CONTAMINATION_DELTA_FLOOR,
  DOMAINS,
  DOMAIN_WEIGHTS,
  INDEX_VERSION,
  IRT_HYPERPARAMS,
  SUBMETRIC_WEIGHTS,
  THETA_SCALE,
} from '@llmindex/scoring';
import { apiJson } from '@/lib/api';
import { rateLimit } from '@/lib/rate-limit';

export const dynamic = 'force-dynamic';

export async function GET(req: NextRequest) {
  const limited = await rateLimit(req);
  if (limited) return limited;
  return apiJson(
    {
      index_version: INDEX_VERSION,
      domains: DOMAINS,
      domain_weights: DOMAIN_WEIGHTS,
      submetric_weights: SUBMETRIC_WEIGHTS,
      irt_hyperparams: IRT_HYPERPARAMS,
      theta_scale: THETA_SCALE,
      contamination_delta_floor: CONTAMINATION_DELTA_FLOOR,
      notes:
        'Latency and cost are never blended into quality scores; they are published as an efficiency (Pareto) frontier.',
    },
    { cacheSeconds: 3600 },
  );
}