using LiveCharts.Wpf;
using System.Windows.Media;
using System.Windows.Threading;
using WpfApp.src.config;
using WpfApp.Utils;

namespace WpfApp.Services
{
    /// <summary>
    /// Chart 管理器 - 负责图表初始化和实时更新
    /// </summary>
    public class ChartManager
    {
        private readonly Dispatcher dispatcher;

        public ChartManager(Dispatcher uiDispatcher)
        {
            dispatcher = uiDispatcher;
        }

        /// <summary>
        /// 初始化图表
        /// </summary>
        public void InitCharts(params CartesianChart[] charts)
        {
            var labels = new[] { "13:27 23", "13:27 45", "13:27 49", "13:27 50", "13:27 55" };

            var config = new ChartConfig
            {
                ColumnData = new List<double> { 20, 10, 12, 5, 9 },
                Labels = labels.ToList(),
                LineConfigs = new List<LineConfig>
                {
                    new LineConfig { Title = "标准1", Values = Enumerable.Repeat(5.0,5).ToList(), Stroke = Brushes.Blue },
                    new LineConfig { Title = "标准2", Values = Enumerable.Repeat(10.0,5).ToList(), Stroke = Brushes.Green },
                    new LineConfig { Title = "标准3", Values = Enumerable.Repeat(30.0,5).ToList(), Stroke = Brushes.Red, Unit="A" }
                }
            };

            foreach (var chart in charts)
            {
                InitChart.InitCartesianChart(chart, config);
            }
        }

        /// <summary>
        /// 动态更新图表数据（线程安全）
        /// </summary>
        public void UpdateChart(CartesianChart chart, List<double> columnData, List<LineConfig> lineData)
        {
            dispatcher.Invoke(() =>
            {
                var config = new ChartConfig
                {
                    ColumnData = columnData,
                    Labels = chart.AxisX[0].Labels.ToList(),
                    LineConfigs = lineData
                };
                InitChart.InitCartesianChart(chart, config);
            });
        }

        /// <summary>
        /// 模拟后台数据采集并实时刷新图表
        /// </summary>
        public void StartAutoUpdate(CartesianChart chart, CancellationToken token)
        {
            Task.Run(async () =>
            {
                var rand = new Random();

                while (!token.IsCancellationRequested)
                {
                    // 模拟采集数据
                    var columnData = Enumerable.Range(0, 5).Select(_ => rand.NextDouble() * 50).ToList();
                    var lineData = new List<LineConfig>
                    {
                        new LineConfig { Title = "标准1", Values = Enumerable.Range(0,5).Select(_ => rand.NextDouble()*20).ToList(), Stroke = Brushes.Blue },
                        new LineConfig { Title = "标准2", Values = Enumerable.Range(0,5).Select(_ => rand.NextDouble()*30).ToList(), Stroke = Brushes.Green },
                        new LineConfig { Title = "标准3", Values = Enumerable.Range(0,5).Select(_ => rand.NextDouble()*40).ToList(), Stroke = Brushes.Yellow }

                    };

                    // 更新图表（通过 Dispatcher 保证线程安全）
                    UpdateChart(chart, columnData, lineData);

                    await Task.Delay(5000); // 每秒更新一次
                }
            }, token);
        }
    }
}