using OxyPlot;
using OxyPlot.Series;
using System.Windows;
using System.Windows.Threading;

namespace EmptyLoadTest
{
    public partial class CurveWindow : Window
    {
        private PlotModel _plotModel;
        private LineSeries _torqueSpeedSeries;
        private DispatcherTimer _updateTimer;
        private static CurveWindow _instance;

        // 用于存储数据的队列（支持后台记录）
        private readonly Queue<DataPoint> _dataQueue = new Queue<DataPoint>();
        private readonly object _lockObject = new object();

        // 最大缓存数据点数
        private const int MAX_CACHE_POINTS = 1000;

        public static CurveWindow Instance
        {
            get
            {
                if (_instance == null || !_instance.IsLoaded)
                {
                    _instance = new CurveWindow();
                }
                return _instance;
            }
        }

        public CurveWindow()
        {
            InitializeComponent();
            InitializeChart();
            InitializeUpdateTimer();
        }

        // 外部调用此方法来更新数据（即使窗口未打开也会缓存）
        public void UpdateData(float torque, float speed)
        {
            lock (_lockObject)
            {
                // 添加到队列
                _dataQueue.Enqueue(new DataPoint(torque, speed));

                // 限制队列大小
                if (_dataQueue.Count > MAX_CACHE_POINTS)
                {
                    _dataQueue.Dequeue();
                }
            }

            // 如果窗口已打开，立即更新显示
            if (this.IsLoaded && IsVisible)
            {
                ProcessQueuedData();
            }
        }

        private void ProcessQueuedData()
        {
            lock (_lockObject)
            {
                while (_dataQueue.Count > 0)
                {
                    var point = _dataQueue.Dequeue();
                    _torqueSpeedSeries.Points.Add(point);

                    // 限制显示的数据点数
                    if (_torqueSpeedSeries.Points.Count > 500)
                    {
                        _torqueSpeedSeries.Points.RemoveAt(0);
                    }
                }

                _plotModel.InvalidatePlot(true);
                UpdateStatusDisplay();
            }
        }

        private void UpdateTimer_Tick(object sender, EventArgs e)
        {
            try
            {
                // 处理队列中的数据
                ProcessQueuedData();
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine($"曲线更新失败: {ex.Message}");
            }
        }

        // 新增：获取当前数据点数
        public int GetDataCount()
        {
            lock (_lockObject)
            {
                return _dataQueue.Count + _torqueSpeedSeries.Points.Count;
            }
        }

        // 清空数据
        public void ClearData()
        {
            lock (_lockObject)
            {
                _dataQueue.Clear();
                _torqueSpeedSeries.Points.Clear();
            }

            if (this.IsLoaded)
            {
                _plotModel.InvalidatePlot(true);
                UpdateStatusDisplay();
            }
        }
    }
}