using System;
using System.Diagnostics;

namespace YwxAppWpfDanMu.Utils
{
    public class RateLimiter
    {
        private readonly int _maxActionsPerSecond;
        private readonly Stopwatch _stopwatch;
        private int _actionCount;
        private long _lastResetTicks;

        public RateLimiter(int maxActionsPerSecond)
        {
            if (maxActionsPerSecond <= 0)
                throw new ArgumentOutOfRangeException(nameof(maxActionsPerSecond));

            _maxActionsPerSecond = maxActionsPerSecond;
            _stopwatch = Stopwatch.StartNew();
            _lastResetTicks = _stopwatch.ElapsedTicks;
        }

        public bool TryAcquire()
        {
            long elapsedTicks = _stopwatch.ElapsedTicks;
            long ticksPerSecond = Stopwatch.Frequency;

            // 检查是否需要重置计数器
            if (elapsedTicks - _lastResetTicks >= ticksPerSecond)
            {
                _actionCount = 0;
                _lastResetTicks = elapsedTicks;
            }

            // 检查是否超过限制
            if (_actionCount >= _maxActionsPerSecond)
            {
                return false;
            }

            _actionCount++;
            return true;
        }
    }
}