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using Microsoft.ML;
using Microsoft.ML.Transforms.TimeSeries;
using SciChart.Charting.Model.ChartSeries;
using SciChart.Charting.Model.DataSeries;
using SciChart.Charting.Visuals.Annotations;
using SciChart.Charting.Visuals.RenderableSeries;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Media;
using Tango.BL.Enumerations;
using Tango.Core;
using Tango.FSE.Insights.ML;
namespace Tango.FSE.Insights.SciChart
{
public class InsightsChart : ExtendedObject
{
public event EventHandler IsVisibleChanged;
private ObservableCollection<InsightsChart> ChartsCollection { get; set; }
public String Name { get; set; }
public String Description { get; set; }
public TechMonitors TechMonitor { get; set; }
public PropertyInfo InsightsMonitorsProperty { get; set; }
public IRenderableSeriesViewModel RenderableSeries { get; set; }
public XyDataSeries<DateTime, double> DataSeries { get; set; }
public List<MonitorValue> MonitorValues { get; set; }
public AnnotationCollection Annotations { get; set; }
public List<DetectedAnnomaly> Anomalies { get; set; }
private bool _isVisible;
public bool IsVisible
{
get { return _isVisible; }
set
{
if (_isVisible != value)
{
_isVisible = value;
RaisePropertyChangedAuto();
IsVisibleChanged?.Invoke(this, new EventArgs());
}
}
}
public bool IsLast
{
get
{
return ChartsCollection.Last() == this;
}
}
public InsightsChart(ObservableCollection<InsightsChart> chartsCollection)
{
Anomalies = new List<DetectedAnnomaly>();
MonitorValues = new List<MonitorValue>();
ChartsCollection = chartsCollection;
ChartsCollection.CollectionChanged += ChartsCollection_CollectionChanged;
RenderableSeries = new LineRenderableSeriesViewModel() { DrawNaNAs = LineDrawMode.Gaps };
RenderableSeries.Stroke = Colors.DodgerBlue;
DataSeries = new XyDataSeries<DateTime, double>();
RenderableSeries.DataSeries = DataSeries;
Annotations = new AnnotationCollection();
}
private void ChartsCollection_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
RaisePropertyChanged(nameof(IsLast));
}
public List<DetectedAnnomaly> DetectAnnomalies(Action<int> progress = null)
{
List<DetectedAnnomaly> annomalies = new List<DetectedAnnomaly>();
if (MonitorValues.Count > 0 && MonitorValues.Any(x => x.Value != 0))
{
var chunks = MonitorValues.ChunkBy(1000);
double lastValue = 0;
int totalIndex = 0;
foreach (var chunk in chunks)
{
MLContext mlContext = new MLContext();
IDataView view = mlContext.Data.LoadFromEnumerable<MonitorValue>(chunk);
var iidSpikeEstimator = mlContext.Transforms.DetectIidSpike(outputColumnName: nameof(MonitorSeriesPrediction.Prediction), inputColumnName: nameof(MonitorValue.Value), confidence: 95, pvalueHistoryLength: chunk.Count / 4, side: AnomalySide.Positive);
ITransformer iidSpikeTransform = iidSpikeEstimator.Fit(CreateEmptyDataView(mlContext));
IDataView transformedData = iidSpikeTransform.Transform(view);
var predictions = mlContext.Data.CreateEnumerable<MonitorSeriesPrediction>(transformedData, reuseRowObject: false);
int index = 0;
foreach (var p in predictions)
{
if (p.Prediction[2] < (1 - 0.95))
{
p.Prediction[0] = 1;
}
if (p.Prediction[0] == 1)
{
var monitorValue = chunk[index];
if (lastValue != monitorValue.Value)
{
annomalies.Add(new DetectedAnnomaly()
{
Type = AnomalyType.Spike,
Time = monitorValue.Time,
Value = monitorValue.Value,
Score = p.Prediction[1],
});
lastValue = monitorValue.Value;
}
}
index++;
totalIndex++;
progress?.Invoke(totalIndex);
}
}
annomalies = annomalies.OrderByDescending(x => x.Score).Take(10).OrderBy(x => x.Time).ToList();
}
progress?.Invoke(MonitorValues.Count);
Anomalies = annomalies.ToList();
return annomalies;
}
private IDataView CreateEmptyDataView(MLContext context)
{
IEnumerable<MonitorValue> enumerableData = new List<MonitorValue>();
return context.Data.LoadFromEnumerable(enumerableData);
}
public void DrawAnomalies()
{
foreach (var anomaly in Anomalies)
{
CustomAnnotation annotation = new CustomAnnotation();
annotation.CoordinateMode = AnnotationCoordinateMode.Absolute;
annotation.X1 = anomaly.Time.ToLocalTime();
annotation.Y1 = anomaly.Value;
annotation.Content = anomaly;
annotation.ContentTemplate = Application.Current.Resources["InsightAnomalyTemplate"] as DataTemplate;
Annotations.Add(annotation);
}
}
}
}
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