using RealTimeGraphEx.Controllers;
using RealTimeGraphEx.Models;
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.Media.Imaging;
using System.Windows.Shapes;
using System.Windows.Threading;

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

        protected List<RealTimeGraphExReachPolygon> _graphPolygons;
        protected List<Polygon> polygons;
        protected Brush _stroke;
        protected Brush _fill;
        protected bool _fillGraph;

        #endregion

        #region Constructors

        public RealTimeGraphExReachMultiLineScroll()
            : base()
        {
            _graphPolygons = new List<RealTimeGraphExReachPolygon>();
            _graphController = new GraphMultiController();
            polygons = new List<Polygon>();
        }

        #endregion

        #region Properties

        /// <summary>
        /// Gets or sets the graph strokes color.
        /// </summary>
        public Brush Stroke
        {
            get { return (Brush)GetValue(StrokeProperty); }
            set { SetValue(StrokeProperty, value); }
        }
        public static readonly DependencyProperty StrokeProperty =
            DependencyProperty.Register("Stroke", typeof(Brush), typeof(RealTimeGraphExReachMultiLineScroll), new PropertyMetadata(Brushes.Black, new PropertyChangedCallback(CrossModelChanged)));

        /// <summary>
        /// Gets or sets the graph fill color.
        /// </summary>
        public Brush Fill
        {
            get { return (Brush)GetValue(FillProperty); }
            set { SetValue(FillProperty, value); }
        }
        public static readonly DependencyProperty FillProperty =
            DependencyProperty.Register("Fill", typeof(Brush), typeof(RealTimeGraphExReachMultiLineScroll), new PropertyMetadata(null, new PropertyChangedCallback(CrossModelChanged)));

        /// <summary>
        /// Gets or sets whether the graph will be rendered using the Fill color property.
        /// </summary>
        public bool FillGraph
        {
            get { return (bool)GetValue(FillGraphProperty); }
            set { SetValue(FillGraphProperty, value); }
        }
        public static readonly DependencyProperty FillGraphProperty =
            DependencyProperty.Register("FillGraph", typeof(bool), typeof(RealTimeGraphExReachMultiLineScroll), new PropertyMetadata(false, new PropertyChangedCallback(CrossModelChanged)));

        #endregion

        #region Override Methods

        protected override void OnControllerChanged()
        {
            if (_graphController != null)
            {
                _graphController.RegisterMethods(ClearGraph, StartPushThread, SetPaused, ChangeRenderMode, null);
                polygons.Clear();
                gridLinesAndImageWrapperGrid.Children.Remove(img);

                foreach (var dataSeries in _graphController.DataSeriesCollection)
                {
                    _graphPolygons.Add(new RealTimeGraphExReachPolygon());
                    Polygon polygon = new Polygon();
                    polygons.Add(polygon);
                    gridLinesAndImageWrapperGrid.Children.Add(polygon);
                }
            }
        }

        protected override void OnSizeChanged(object sender, SizeChangedEventArgs e)
        {
            OnSetCrossThreadFields();
        }

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

            this.Dispatcher.Invoke(() =>
            {
                _maxPoints = MaxPoints;
                _scaleFactor = _width / _maxPoints;
                _graphController = Controller;
                _stroke = Stroke;
                _fill = Fill;

                if (_graphController != null && _graphController.dataSeriesCollection != null && _graphController.dataSeriesCollection.Count > 0)
                {
                    for (int i = 0; i < _graphController.dataSeriesCollection.Count; i++)
                    {
                        polygons[i].Fill = _graphController.dataSeriesCollection[i].fill;
                        polygons[i].Stroke = _graphController.dataSeriesCollection[i].stroke;
                        polygons[i].Margin = new Thickness(-2, 1, -2, 0);
                    }
                }



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

        protected override void OnClearGraph()
        {
            _graphPolygons.ForEach(x => x.ClearPoints());
            _graphPolygons.ForEach(x => x.ClearActualPoints());

            this.Dispatcher.Invoke(() =>
            {
                foreach (var polygon in polygons)
                {
                    polygon.Points.Clear();
                }
            });

            base.OnClearGraph();
        }

        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.Count; i++)
                {
                    double seriesCounter = xValueCounter;


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

                        double valuePrecentage = value;

                        _graphPolygons[i].Add(seriesCounter, valuePrecentage, value);
                        seriesCounter += _scaleFactor;
                    }
                }

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

                if (_graphPolygons[0].TotalPoints > _maxPoints + _graphController.dataSeriesCollection[0].Points.Count)
                {
                    xValueCounter -= (_scaleFactor * (_graphPolygons[0].TotalPoints - (_maxPoints + _graphController.dataSeriesCollection[0].Points.Count)));

                    foreach (var polygon in _graphPolygons)
                    {
                        polygon.RemoveFromStart(polygon.TotalPoints - (_maxPoints + _graphController.dataSeriesCollection[0].Points.Count));
                    }
                }


                updateCounter++;

                if (updateCounter >= 1)
                {
                    updateCounter = 0;

                    if (!_isPaused)
                    {
                        OnDrawVisuals();
                    }
                }
            }
        }

        #endregion

        #region Virtual Methods

        protected virtual void OnDrawVisuals()
        {
            for (int i = 0; i < _graphPolygons.Count; i++)
            {
                var polygon = _graphPolygons[i];
                double scale = _width / (polygon.TotalPoints - 1);

                if (polygon.Points.Count > 0)
                {
                    if (_graphController.dataSeriesCollection[i].isVisible) //Fill Graph
                    {
                        this.Dispatcher.Invoke(() =>
                        {
                            polygons[i].Points = new PointCollection(polygon.ToPolygonPointsFill(_width, _height, scale, ConvertYToImageYFliped));

                        }, DispatcherPriority.Send);
                    }
                    else
                    {
                        this.Dispatcher.Invoke(() =>
                        {
                            polygons[i].Points.Clear();
                        }, DispatcherPriority.Send);
                    }
                }
            }
        }

        #endregion
    }
}