import { useState, useEffect, useCallback, useMemo } from 'react';
import { useDubs } from '../provider';
import type { ArcadePool, ArcadePoolStats, ArcadeLeaderboardEntry } from '../types';

export interface UseArcadePoolResult {
  pool: ArcadePool | null;
  stats: ArcadePoolStats | null;
  leaderboard: ArcadeLeaderboardEntry[];
  loading: boolean;
  error: Error | null;
  refetch: () => void;
}

export function useArcadePool(poolId: number | null): UseArcadePoolResult {
  const { client } = useDubs();
  const [pool, setPool] = useState<ArcadePool | null>(null);
  const [stats, setStats] = useState<ArcadePoolStats | null>(null);
  const [leaderboard, setLeaderboard] = useState<ArcadeLeaderboardEntry[]>([]);
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState<Error | null>(null);

  const fetch = useCallback(async () => {
    if (!poolId) return;
    setLoading(true);
    setError(null);
    try {
      const [poolRes, lb] = await Promise.all([
        client.getArcadePool(poolId),
        client.getArcadeLeaderboard(poolId),
      ]);
      setPool(poolRes.pool);
      setStats(poolRes.stats);
      setLeaderboard(lb);
    } catch (err) {
      setError(err instanceof Error ? err : new Error(String(err)));
    } finally {
      setLoading(false);
    }
  }, [client, poolId]);

  useEffect(() => { fetch(); }, [fetch]);

  return { pool, stats, leaderboard, loading, error, refetch: fetch };
}