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

namespace RealTimeGraphEx.Models
{
    public class ConcurrentpointsList
    {
        private List<double> points;
        private List<double> temppoints;
        private readonly object _lock = new object();
        private bool isReading;

        public ConcurrentpointsList()
        {
            points = new List<double>();
            temppoints = new List<double>();
        }

        public void StartReading()
        {
            lock (_lock)
            {
                isReading = true;
            }
        }

        public void StopReading()
        {
            lock (_lock)
            {
                isReading = false;
            }
        }

        public void Add(double value)
        {
            if (!isReading)
            {
                lock (_lock)
                {
                    points.AddRange(temppoints);
                    points.Add(value);
                }
            }
            else
            {
                lock (_lock)
                {
                    temppoints.Add(value);
                }
            }
        }

        public void AddRange(IEnumerable<double> values)
        {
            if (!isReading)
            {
                lock (_lock)
                {
                    points.AddRange(temppoints);
                    points.AddRange(values);
                }
            }
            else
            {
                lock (_lock)
                {
                    temppoints.AddRange(values);
                }
            }
        }

        public void Replace(double value, int index)
        {
            lock (_lock)
            {
                if (index < points.Count)
                {
                    points.RemoveAt(index);
                    points.Insert(index, value);
                }
            }
        }

        public void RemoveFromStart(int count)
        {
            if (count < 1) return;

            lock (_lock)
            {
                points.RemoveRange(0, count);
            }
        }

        public void RemoveRange(int index, int count)
        {
            lock (_lock)
            {
                points.RemoveRange(index, count);
            }
        }

        public void Clear()
        {
            lock (_lock)
            {
                points.Clear();
                temppoints.Clear();
            }
        }

        public List<double> GetAndClearAllPoints()
        {
            List<double> clonedPoints = new List<double>();

            lock (_lock)
            {
                clonedPoints.AddRange(points);
                points.Clear();
            }

            return clonedPoints;
        }

        public int Count
        {
            get
            {
                lock (_lock)
                {
                    return points.Count;
                }
            }
        }

        public double this[int index]
        {
            get
            {
                lock (_lock)
                {
                    return points[index];
                }
            }
            set
            {
                lock (_lock)
                {
                    points[index] = value;
                }
            }
        }

        #region DX

        public SharpDX.Vector2[] ToDXPolygonPoints(double offsetX, double offsetY, double scaleFactor, Func<double, double> scaleY)
        {
            double xValue = 0;

            lock (_lock)
            {
                SharpDX.Vector2[] vectors = new SharpDX.Vector2[points.Count];

                try
                {
                    for (int i = 0; i < points.Count; i++)
                    {
                        vectors[i] = new SharpDX.Vector2((float)(xValue + offsetX), (float)(scaleY(points[i]) + offsetY));
                        xValue += scaleFactor;
                    }

                    return vectors;
                }
                catch
                {
                    return vectors;
                }
            }
        }

        public SharpDX.Vector2[] ToDXPolygonPointsFill(double offsetX, double offsetY, double width, double height, double scaleFactor, Func<double, double> scaleY)
        {
            double xValue = 0;

            lock (_lock)
            {
                SharpDX.Vector2[] vectors = new SharpDX.Vector2[points.Count + 4];

                for (int i = 0; i < points.Count; i++)
                {
                    vectors[i] = new SharpDX.Vector2((float)(xValue + offsetX), (float)(scaleY(points[i]) + offsetY));
                    xValue += scaleFactor;
                }

                xValue += scaleFactor;

                int c = points.Count - 1;
                vectors[c++] = new SharpDX.Vector2((float)(xValue + offsetX), (float)vectors[vectors.Length - 5].Y);
                vectors[c++] = new SharpDX.Vector2((float)(xValue + offsetX), (float)height);
                vectors[c++] = new SharpDX.Vector2(0, (float)height);
                vectors[c++] = new SharpDX.Vector2(0, (float)vectors[1].Y);

                return vectors;
            }
        }

        #endregion

        #region Fast

        public int[] ToPolygonPoints(double offsetX, double offsetY, double scaleFactor, Func<double, double> scaleY)
        {
            double xValue = 0;

            lock (_lock)
            {
                List<int> polyPoints = new List<int>();

                try
                {
                    for (int i = 0; i < points.Count; i++)
                    {
                        polyPoints.Add((int)(xValue + offsetX));
                        polyPoints.Add((int)(scaleY(points[i]) + offsetY));
                        xValue += scaleFactor;
                    }

                    return polyPoints.ToArray();
                }
                catch
                {
                    return polyPoints.ToArray();
                }
            }
        }

        public int[] ToPolygonPointsFill(double offsetX, double offsetY, double width, double height, double scaleFactor, Func<double, double> scaleY)
        {
            double xValue = 0;

            lock (points)
            {
                List<int> polyPoints = new List<int>();

                for (int i = 0; i < points.Count; i++)
                {
                    polyPoints.Add((int)(xValue + offsetX));
                    polyPoints.Add((int)(scaleY(points[i]) + offsetY));

                    xValue += scaleFactor;
                }

                polyPoints.Add((int)((xValue - scaleFactor) + offsetX));
                polyPoints.Add((int)height);
                polyPoints.Add(0);
                polyPoints.Add((int)height);
                polyPoints.Add(0);
                polyPoints.Add(polyPoints[1]);

                return polyPoints.ToArray();
            }
        }

        public int[] ToPolygonPointsReflection(double offsetX, double offsetY, double height, double scaleFactor, Func<double, double> scaleY)
        {
            double xValue = 0;

            lock (points)
            {
                List<int> polyPoints = new List<int>();

                for (int i = 0; i < points.Count; i++)
                {
                    polyPoints.Add((int)(xValue + offsetX));
                    polyPoints.Add((int)((height - scaleY(points[i])) + offsetY));

                    xValue += scaleFactor;
                }

                return polyPoints.ToArray();
            }
        }

        public int[] ToPolygonPointsWaveFill(double offsetX, double offsetY, double width, double height, double scaleFactor, Func<double, double> scaleY)
        {
            double xValue = 0;

            lock (points)
            {
                List<int> polyPoints = new List<int>();

                for (int i = 0; i < points.Count; i++)
                {
                    polyPoints.Add((int)(xValue + offsetX));
                    polyPoints.Add((int)((scaleY(points[i])) + offsetY));

                    xValue += scaleFactor;
                }

                polyPoints.Add((int)width);
                polyPoints.Add((int)(height / 2));

                polyPoints.Add((int)width);
                polyPoints.Add((int)((height - scaleY(points[points.Count - 1])) + offsetY));

                xValue -= scaleFactor;

                for (int i = points.Count - 1; i >= 0; i--)
                {
                    polyPoints.Add((int)(xValue + offsetX));
                    polyPoints.Add((int)((height - scaleY(points[i])) + offsetY));

                    xValue -= scaleFactor;
                }

                polyPoints.Add(0);
                polyPoints.Add(polyPoints[polyPoints.Count - 2]);
                polyPoints.Add(polyPoints[0]);
                polyPoints.Add((int)(height / 2));
                polyPoints.Add(0);
                polyPoints.Add((int)(height / 2));
                polyPoints.Add(0);
                polyPoints.Add(polyPoints[1]);

                return polyPoints.ToArray();
            }
        }

        #endregion

        #region Reach

        public List<Point> ToReachPolygonPoints(double width, double height, double scaleFactor, Func<double, double> scaleY)
        {
            double xValue = 0;

            lock (points)
            {
                List<Point> polyPoints = new List<Point>();

                for (int i = 0; i < points.Count; i++)
                {
                    polyPoints.Add(new Point(xValue, scaleY(points[i])));
                    xValue += scaleFactor;
                }

                return polyPoints;
            }
        }

        public List<Point> ToReachPolygonPointsFill(double width, double height, double scaleFactor, Func<double, double> scaleY)
        {
            double xValue = 0;

            lock (points)
            {
                List<Point> polyPoints = new List<Point>();

                for (int i = 0; i < points.Count; i++)
                {
                    polyPoints.Add(new Point(xValue, scaleY(points[i])));
                    xValue += scaleFactor;
                }

                polyPoints.Add(new Point(xValue, height));

                polyPoints.Add(new Point(0, height));

                polyPoints.Add(new Point(0, polyPoints[0].Y));

                return polyPoints;
            }
        }

        public List<Point> ToReachPolygonPointsWaveFill(double width, double height, double scaleFactor, Func<double, double> scaleY)
        {
            if (points.Count == 0) return new List<Point>();

            double xValue = 0;

            lock (points)
            {
                List<Point> polyPoints = new List<Point>();

                for (int i = 0; i < points.Count; i++)
                {
                    polyPoints.Add(new Point(xValue, scaleY(points[i])));
                    xValue += scaleFactor;
                }

                polyPoints.Add(new Point(width, (height / 2)));

                polyPoints.Add(new Point(width, (height - scaleY(points[points.Count - 1]))));

                xValue -= scaleFactor;

                for (int i = points.Count - 1; i >= 0; i--)
                {
                    polyPoints.Add(new Point(xValue, (height - scaleY(points[i]))));
                    xValue -= scaleFactor;
                }

                polyPoints.Add(new Point(0, polyPoints[polyPoints.Count - 1].Y));

                polyPoints.Add(new Point(0, (height / 2)));

                polyPoints.Add(new Point(0, (height / 2)));

                polyPoints.Add(new Point(0, polyPoints[0].Y));

                return polyPoints;
            }
        }

        #endregion

        public List<double> GetPoints()
        {
            lock (_lock)
            {
                return points.ToList();
            }
        }
    }
}