// Leaderboard routes: GET /api/leaderboard?type=level|gold|kills&page=1
const zod = require('zod');
const { AppError } = require('../utils/errors');
const { requireAuth } = require('../middleware/session');
const { getLeaderboard } = require('../services/leaderboardService');

function wrap(fn) {
  return (req, res, next) => Promise.resolve(fn(req, res, next)).catch(next);
}

const VALID_TYPES = ['level', 'gold', 'kills'];

/**
 * GET /api/leaderboard — return ranked leaderboard entries.
 */
async function handleLeaderboard(req, res) {
  const parsed = zod.strictObject({
    type: zod.enum(VALID_TYPES),
    page: zod.coerce.number().int().min(1).default(1),
    limit: zod.coerce.number().int().min(1).max(50).default(50),
  }).safeParse(req.query);
  if (!parsed.success) {
    throw new AppError('VALIDATION_ERROR', 'Request validation failed.', 400);
  }

  const { type, page, limit } = parsed.data;
  const result = getLeaderboard(type, page, limit);
  res.json({ ok: true, data: result });
}

module.exports = {
  routes: {
    getLeaderboard: wrap(handleLeaderboard),
  },
};