using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Media;
using System.Windows.Shapes;

namespace RealTimeGraphEx.ReachGraphs
{
    public class RealTimeGraphExReachMultiLineErase : RealTimeGraphExReachMultiLineScroll
    {
        #region Cross Thread Fields

        protected Brush _markerColor;
        protected bool _showMarker;
        protected bool _endReached;
        protected int _currentReplaceIndex;
        protected Rectangle marker;

        #endregion

        #region Constructors

        public RealTimeGraphExReachMultiLineErase()
            : base()
        {

        }

        #endregion

        #region Properties


        /// <summary>
        /// Gets or sets the graph marker color.
        /// </summary>
        public Brush MarkerColor
        {
            get { return (Brush)GetValue(MarkerColorProperty); }
            set { SetValue(MarkerColorProperty, value); }
        }
        public static readonly DependencyProperty MarkerColorProperty =
            DependencyProperty.Register("MarkerBrush", typeof(Brush), typeof(RealTimeGraphExReachMultiLineErase), new PropertyMetadata(Brushes.Red, new PropertyChangedCallback(CrossModelChanged)));

        /// <summary>
        /// Gets or sets whether to display the marker on the graph.
        /// </summary>
        public bool ShowMarker
        {
            get { return (bool)GetValue(ShowMarkerProperty); }
            set { SetValue(ShowMarkerProperty, value); }
        }
        public static readonly DependencyProperty ShowMarkerProperty =
            DependencyProperty.Register("ShowMarker", typeof(bool), typeof(RealTimeGraphExReachMultiLineErase), new PropertyMetadata(true, new PropertyChangedCallback(CrossModelChanged)));


        #endregion

        #region Override Methods

        protected override void Initialize()
        {
            base.Initialize();
            marker = new Rectangle() { VerticalAlignment = System.Windows.VerticalAlignment.Stretch, Width = 1, Fill = MarkerColor, HorizontalAlignment = System.Windows.HorizontalAlignment.Left, Margin = new Thickness(-2, 0, 0, 0) };

            if (!gridLinesAndImageWrapperGrid.Children.Contains(marker))
            {
                gridLinesAndImageWrapperGrid.Children.Add(marker);
            }
        }

        protected override void OnSetCrossThreadFields()
        {
            base.OnSetCrossThreadFields();

            this.Dispatcher.Invoke(() =>
            {

                _markerColor = MarkerColor;
                _showMarker = ShowMarker;

            }, System.Windows.Threading.DispatcherPriority.Send);
        }

        protected override void OnClearGraph()
        {
            base.OnClearGraph();

            _currentReplaceIndex = 0;
            _endReached = false;

            this.Dispatcher.Invoke(() =>
            {
                marker.RenderTransform = new TranslateTransform(0, 0);
            });
        }

        protected internal override void OnRenderGraph()
        {
            if (_graphController != null && _graphController.dataSeriesCollection.Count > 0 && _graphController.TotalPoints > 0  && _width > 1 && _height > 1)
            {
                for (int i = 0; i < _graphController.dataSeriesCollection[0].Points.Count; i++) //Match
                {
                    if (xValueCounter <= _width)
                    {
                        if (!_endReached)
                        {
                            for (int j = 0; j < _graphController.dataSeriesCollection.Count; j++)
                            {
                                double value = _graphController.dataSeriesCollection[j].Points[i];
                                double valuePrecentage = value;

                                _graphPolygons[j].Add(xValueCounter, valuePrecentage, value);
                            }

                            xValueCounter += _scaleFactor;
                        }
                        else
                        {
                            for (int j = 0; j < _graphController.dataSeriesCollection.Count; j++)
                            {
                                double value = _graphController.dataSeriesCollection[j].Points[i];

                                double valuePrecentage = value;
                                _graphPolygons[j].Replace(xValueCounter, valuePrecentage, value, _currentReplaceIndex);

                                if (j == _graphController.dataSeriesCollection.Count - 1)
                                {
                                    _currentReplaceIndex++;
                                }
                            }

                            xValueCounter += _scaleFactor;

                            if (_currentReplaceIndex > _graphPolygons[0].TotalPoints - 1)
                            {
                                xValueCounter = 0;
                                _currentReplaceIndex = 0;
                            }
                        }
                    }
                    else
                    {
                        _endReached = true;
                        xValueCounter = 0;


                        for (int j = 0; j < _graphController.dataSeriesCollection.Count; j++)
                        {
                            double value = _graphController.dataSeriesCollection[j].Points[i];

                            double valuePrecentage = value;

                            _graphPolygons[j].Replace(xValueCounter, valuePrecentage, value, _currentReplaceIndex);

                            if (j == _graphController.dataSeriesCollection.Count - 1)
                            {
                                _currentReplaceIndex++;
                            }
                        }

                        xValueCounter += _scaleFactor;
                    }
                }


                updateCounter++;

                if (updateCounter >= 1 && !_isPaused)
                {
                    OnDrawVisuals();
                }
            }
        }

        protected override void OnDrawVisuals()
        {
            base.OnDrawVisuals();

            if (_graphPolygons.Count > 0)
            {
                double scale = _width / (_graphPolygons[0].TotalPoints - 1);

                this.Dispatcher.Invoke(() =>
                {
                    marker.RenderTransform = new TranslateTransform((_currentReplaceIndex * scale) - 2, 0);
                });
            }
        }

        #endregion
    }
}