import { Router } from 'express';
import { z } from 'zod';
import * as repo from '../../db/repos/search.js';
import { parsePagination } from '../pagination.js';
import { validate } from '../validate.js';
import { asyncWrap } from '../errors.js';

const KINDS = ['page','ref','source_doc','message'];

const querySchema = z.object({
  q: z.string().min(1),
  space_id: z.string().uuid().optional(),
  kinds: z.string().optional(),
  limit: z.string().optional(),
  offset: z.string().optional()
});

export const router = Router();

// Hybrid vector + reciprocal-rank-fusion search lands in Plan 3 (see
// docs/superpowers/specs/2026-05-31-void-v2-design.md §search).
router.get('/',
  validate({ query: querySchema }),
  asyncWrap(async (req, res) => {
    const { limit, offset } = parsePagination(req);
    const rawKinds = req.validatedQuery.kinds;
    const kinds = rawKinds
      ? rawKinds.split(',').map(s => s.trim()).filter(k => KINDS.includes(k))
      : null;
    res.json(await repo.fts({
      q: req.validatedQuery.q,
      space_id: req.validatedQuery.space_id ?? null,
      kinds,
      limit, offset
    }));
  })
);