using System;
using System.Collections.Generic;
using System.Diagnostics;

namespace YwxAppWpfDanMu.Services
{
    public class DanMuPerformanceMonitor
    {
        private readonly Stopwatch _stopwatch = new Stopwatch();
        private readonly List<Exception> _errors = new List<Exception>();

        private int _totalDanMuAdded;
        private int _totalDanMuFiltered;
        private int _totalDanMuRemoved;

        public void Start()
        {
            _stopwatch.Start();
        }

        public void Stop()
        {
            _stopwatch.Stop();
        }

        public void RecordAddedDanMu()
        {
            _totalDanMuAdded++;
        }

        public void RecordFilteredDanMu()
        {
            _totalDanMuFiltered++;
        }

        public void RecordRemovedDanMu()
        {
            _totalDanMuRemoved++;
        }

        public void RecordClear()
        {
            _totalDanMuRemoved += _totalDanMuAdded - _totalDanMuRemoved;
        }

        public void RecordError(Exception ex)
        {
            _errors.Add(ex);
        }

        public PerformanceStats GetStats()
        {
            return new PerformanceStats
            {
                TotalTime = _stopwatch.Elapsed,
                TotalDanMuAdded = _totalDanMuAdded,
                TotalDanMuFiltered = _totalDanMuFiltered,
                TotalDanMuRemoved = _totalDanMuRemoved,
                Errors = _errors.ToArray(),
                DanMuPerSecond = _stopwatch.Elapsed.TotalSeconds > 0 ?
                    _totalDanMuAdded / _stopwatch.Elapsed.TotalSeconds : 0
            };
        }

        public class PerformanceStats
        {
            public TimeSpan TotalTime { get; set; }
            public int TotalDanMuAdded { get; set; }
            public int TotalDanMuFiltered { get; set; }
            public int TotalDanMuRemoved { get; set; }
            public Exception[] Errors { get; set; }
            public double DanMuPerSecond { get; set; }
        }
    }
}