'use strict';

/**
 * GET /api/players/search (Session 60, night2/E — audit fix 4.1).
 *
 * The scan search box's canonical resolver. Before this route existed, MLB
 * search 404'd at Express and NBA/WNBA hit the (usually offline) Python
 * service — "Ohtani" returned nothing while his tile sat on the page.
 *
 * MLB: fuzzy match against the cached statsapi player list (free, 24h
 * cache) — case/diacritic-insensitive, nickname/suffix-aware via nameKey.
 * Other sports: cache-only match against the names the platform already
 * knows (rosterlogs blob + tonight's graded slate). Never an upstream call
 * for non-MLB; empty is a valid answer.
 */

const express = require('express');
const { createRateLimit } = require('../middleware/rateLimit');
const { nameKey } = require('../utils/playerName');

const router = express.Router();
router.use(createRateLimit({ windowMs: 60_000, max: 60 }));

async function cachedNames(sport) {
  const { cacheGet } = require('../utils/redis');
  const out = new Map();
  try {
    const blob = await cacheGet(`rosterlogs:${sport}`);
    for (const p of Array.isArray(blob) ? blob : []) {
      if (p && p.name) out.set(nameKey(p.name), { full_name: p.name, team: p.team || null });
    }
  } catch { /* cache-only, degrade */ }
  try {
    const env = await cacheGet(`grades:${sport}`);
    for (const g of (env && env.grades) || []) {
      const n = g.player || g.player_name;
      if (n && !out.has(nameKey(n))) out.set(nameKey(n), { full_name: n, team: g.team || null });
    }
  } catch { /* cache-only, degrade */ }
  return [...out.values()];
}

router.get('/search', async (req, res) => {
  const sport = String(req.query.sport || 'NBA').toUpperCase();
  const q = String(req.query.q || '').trim();
  if (q.length < 2) return res.json({ players: [] });

  try {
    if (sport === 'MLB') {
      const { searchPlayers } = require('../services/adapters/mlbStatsAdapter');
      const hits = await searchPlayers(q, { limit: 12 });
      return res.json({
        players: hits.map((h) => ({ id: String(h.id), full_name: h.fullName, team: h.team || undefined, position: h.position || undefined })),
      });
    }
    // NBA/WNBA/soccer — the names the platform already carries (cache-only).
    const names = await cachedNames(sport.toLowerCase());
    const qKey = nameKey(q);
    const qLast = qKey.split(' ').pop();
    const players = names
      .filter((p) => {
        const k = nameKey(p.full_name);
        return k === qKey || k.includes(qKey) || (qLast.length >= 3 && k.split(' ').some((w) => w.startsWith(qLast)));
      })
      .slice(0, 12)
      .map((p, i) => ({ id: `${sport}-${i}-${nameKey(p.full_name)}`, full_name: p.full_name, team: p.team || undefined }));
    return res.json({ players });
  } catch (err) {
    console.error('[players/search]', err.message);
    return res.json({ players: [] });
  }
});

module.exports = router;