using PaintDotNet.Base.SettingModel;
using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Globalization;
using System.Runtime.Serialization;
using System.Windows.Forms;
using PaintDotNet.Base.CommTool;
using PaintDotNet.Annotation.Enum;
using System.Collections.Generic;
using PaintDotNet.Annotation.Measure;

namespace PaintDotNet.Annotation.Other
{
    /// <summary>
    /// 光密度测量直线
    /// </summary>
    public class OpticalDensityLine : MeasureDrawObject
    {
        /// <summary>
        /// 可能最后用不到
        /// </summary>
        private const string entryStart = "Start";
        /// <summary>
        /// 可能最后用不到
        /// </summary>
        private const string entryEnd = "End";
        /// <summary>
        ///  Graphic objects for hit test
        /// </summary>
        private GraphicsPath areaPath = null;
        private Pen areaPen = null;
        private Region areaRegion = null;
        /// <summary>
        /// 样式信息model
        /// </summary>
        public MeasureStyleModel.MeasureLine measureLineStyleModel;

        public OpticalDensityLine(ISurfaceBox surfaceBox, int x1, int y1, int x2, int y2) : base()
        {
            this.objectType = DrawClass.Other;
            this.drawToolType = DrawToolType.OpticalDensityLine;

            measureLineStyleModel = surfaceBox.GetMeasureStyleModel().measureLine;
            startPoint.X = x1;
            startPoint.Y = y1;
            endPoint.X = x2;
            endPoint.Y = y2;
            
            Initialize(); 
        }


        public OpticalDensityLine(ISurfaceBox surfaceBox, List<Point> points, ParentStyleModel parentStyleModel, Object content) : base()
        {
            this.objectType = DrawClass.Other;
            this.drawToolType = DrawToolType.OpticalDensityLine;

            this.ISurfaceBox = surfaceBox;

            measureLineStyleModel = (MeasureStyleModel.MeasureLine)parentStyleModel;
            startPoint.X = points[0].X;
            startPoint.Y = points[0].Y;
            endPoint.X = points[1].X;
            endPoint.Y = points[1].Y;
        }

        /// <summary>
        /// Clone this instance
        /// </summary>
        public override DrawObject Clone()
        {
            OpticalDensityLine opticalDensityLine = new OpticalDensityLine(ISurfaceBox, 0, 0, 1, 0);
            opticalDensityLine.objectType = DrawClass.Label;
            opticalDensityLine.drawToolType = DrawToolType.OpticalDensityLine;
            opticalDensityLine.ISurfaceBox = this.ISurfaceBox;
            opticalDensityLine.startPoint = this.startPoint;
            opticalDensityLine.endPoint = this.endPoint;
            FillDrawObjectFields(opticalDensityLine);
            return opticalDensityLine;
        }


        public override void Draw(Graphics g)
        {
            g.SmoothingMode = SmoothingMode.AntiAlias;
            Color color = Color.FromArgb(this.measureLineStyleModel.lineColor);
            Pen pen = new Pen(color, this.measureLineStyleModel.lineWidth);
            pen.DashStyle = (DashStyle)this.measureLineStyleModel.lineStyle;
            double length = BasicCalculationHelper.GetDistance(this.startPoint, this.endPoint, 2);
            double angle = Math.Round(BasicCalculationHelper.AngleText(this.startPoint, this.endPoint, new PointF(this.startPoint.X + 10, this.startPoint.Y)), 10);
            //判断第二个点相对于第一个点的象限
            int x2 = (int)(this.endPoint.X - this.startPoint.X);
            if (x2 == 0)
                x2 = 1;
            int y2 = (int)(this.endPoint.Y - this.startPoint.Y);
            if (y2 == 0)
                y2 = 1;
            int i2 = 0;
            if (x2 > 0 && y2 > 0)             //第4象限
            {
                i2 = 4;
            }
            else if (x2 > 0 && y2 < 0)      //第1象限
            {
                i2 = 1;
            }
            else if (x2 < 0 && y2 < 0)       //第2象限
            {
                i2 = 2;
            }
            else if (x2 < 0 && y2 > 0)          //第3象限
            {
                i2 = 3;
            }
            double sAngle1;
            double eAngle1;
            double sAngle2;
            double eAngle2;
            if (i2 == 1 || i2 == 2)
            {
                sAngle1 = 360 - angle;
                eAngle1 = 180 - angle;
                sAngle2 = 270 - angle;
                eAngle2 = 90 - angle;
            }
            else
            {
                sAngle1 = angle;
                eAngle1 = 180 + angle;
                sAngle2 = 270 + angle;
                eAngle2 = 90 + angle;
            }
            Point point1 = new Point();
            Point point2 = new Point();
            Point point3 = new Point();
            Point point4 = new Point();
            Point point5 = new Point();
            Point point6 = new Point();
            if (sAngle1 is double.NaN && eAngle1 is double.NaN && sAngle2 is double.NaN && eAngle2 is double.NaN)
            {
                
            }
            else
            {
                 point1 = BasicCalculationHelper.GetAnglePoint(new Point((int)this.startPoint.X + (int)(length * kS), (int)this.startPoint.Y), new Point((int)this.startPoint.X, (int)this.startPoint.Y), sAngle1);
                 point2 = BasicCalculationHelper.GetAnglePoint(new Point((int)this.endPoint.X + (int)(length * kE), (int)this.endPoint.Y), new Point((int)this.endPoint.X, (int)this.endPoint.Y), eAngle1);
                 point3 = BasicCalculationHelper.GetAnglePoint(new Point((point1.X + 20), point1.Y), point1, sAngle2);
                 point4 = BasicCalculationHelper.GetAnglePoint(new Point((point1.X + 20), point1.Y), point1, eAngle2);
                 point5 = BasicCalculationHelper.GetAnglePoint(new Point((point2.X + 20), point2.Y), point2, sAngle2);
                 point6 = BasicCalculationHelper.GetAnglePoint(new Point((point2.X + 20), point2.Y), point2, eAngle2);
            }
            g.DrawLine(pen, point3, point4);
            g.DrawLine(pen, point5, point6);
            g.DrawLine(pen, startPoint.X, startPoint.Y, endPoint.X, endPoint.Y);
            pen.Dispose();
        }

        public override int HandleCount
        {
            get
            {
                return 2;
            }
        }

        /// <summary>
        /// Get handle pointscroll by 1-based number
        /// </summary>
        /// <param name="handleNumber"></param>
        /// <returns></returns>
        public override PointF GetHandle(int handleNumber)
        {
            if (handleNumber == 1)
                return startPoint;
            else
                return endPoint;
        }

        /// <summary>
        /// Hit test.
        /// Return value: -1 - no hit
        ///                0 - hit anywhere
        ///                > 1 - handle number
        /// </summary>
        /// <param name="pointscroll"></param>
        /// <returns></returns>
        public override int HitTest(Point point)
        {
            if (Selected)
            {
                for (int i = 1; i <= HandleCount; i++)
                {
                    if (GetHandleRectangle(i).Contains(point))
                        return i;
                }
            }

            if (PointInObject(point))
                return 0;

            return -1;
        }

        protected override bool PointInObject(Point point)
        {
            CreateObjects();

            return AreaRegion.IsVisible(point);
        }

        public override bool IntersectsWith(Rectangle rectangle)
        {
            CreateObjects();

            return AreaRegion.IsVisible(rectangle);
        }

        public override Cursor GetHandleCursor(int handleNumber)
        {
            switch (handleNumber)
            {
                case 1:
                case 2:
                    return handleCursor;// Cursors.SizeAll;
                default:
                    return Cursors.Default;
            }
        }

        public override void MoveHandleTo(Point point, int handleNumber)
        {
            if (handleNumber == 1)
                startPoint = point;
            else
                endPoint = point;

            Invalidate();
        }

        public override void Move(int deltaX, int deltaY)
        {
            int x = ISurfaceBox.UnscaleScalar(deltaX);
            int y = ISurfaceBox.UnscaleScalar(deltaY);

            startPoint.X += x;
            startPoint.Y += y;

            endPoint.X += x;
            endPoint.Y += y;

            Invalidate();
        }

        public override void SaveToStream(SerializationInfo info, int orderNumber)
        {
            info.AddValue(
                String.Format(CultureInfo.InvariantCulture,
                "{0}{1}",
                entryStart, orderNumber),
                startPoint);

            info.AddValue(
                String.Format(CultureInfo.InvariantCulture,
                "{0}{1}",
                entryEnd, orderNumber),
                endPoint);

            base.SaveToStream(info, orderNumber);
        }

        public override void LoadFromStream(SerializationInfo info, int orderNumber)
        {
            startPoint = (Point)info.GetValue(
                String.Format(CultureInfo.InvariantCulture,
                "{0}{1}",
                entryStart, orderNumber),
                typeof(Point));

            endPoint = (Point)info.GetValue(
                String.Format(CultureInfo.InvariantCulture,
                "{0}{1}",
                entryEnd, orderNumber),
                typeof(Point));

            base.LoadFromStream(info, orderNumber);
        }

        /// <summary>
        /// Invalidate object.
        /// When object is invalidated, path used for hit test
        /// is released and should be created again.
        /// </summary>
        protected void Invalidate()
        {
            if (AreaPath != null)
            {
                AreaPath.Dispose();
                AreaPath = null;
            }

            if (AreaPen != null)
            {
                AreaPen.Dispose();
                AreaPen = null;
            }

            if (AreaRegion != null)
            {
                AreaRegion.Dispose();
                AreaRegion = null;
            }
        }

        /// <summary>
        /// Create graphic objects used from hit test.
        /// </summary>
        protected virtual void CreateObjects()
        {
            if (AreaPath != null)
                return;

            // Create path which contains wide line
            // for easy mouse selection
            AreaPath = new GraphicsPath();
            AreaPen = new Pen(Color.Black, 7);
            AreaPath.AddLine(startPoint.X-1, startPoint.Y-1, endPoint.X+1, endPoint.Y+1);
            AreaPath.Widen(AreaPen);

            // Create region from the path
            AreaRegion = new Region(AreaPath);
        }

        protected GraphicsPath AreaPath
        {
            get
            {
                return areaPath;
            }
            set
            {
                areaPath = value;
            }
        }

        protected Pen AreaPen
        {
            get
            {
                return areaPen;
            }
            set
            {
                areaPen = value;
            }
        }

        protected Region AreaRegion
        {
            get
            {
                return areaRegion;
            }
            set
            {
                areaRegion = value;
            }
        }

        public override RectangleF GetBoundingBox()
        {
            RectangleF rectangle = GetNotmalizedRectangle(startPoint, endPoint);

            return rectangle;
        }

        public static RectangleF GetNotmalizedRectangle(PointF a, PointF b)
        {
            RectangleF rect = new RectangleF();
            if (a.X < b.X)
            {
                rect.X = a.X;
                rect.Width = b.X - a.X;
            }
            else
            {
                rect.X = b.X;
                rect.Width = a.X - b.X;
            }

            if (a.Y < b.Y)
            {
                rect.Y = a.Y;
                rect.Height = b.Y - a.Y;
            }
            else
            {
                rect.Y = b.Y;
                rect.Height = a.Y - b.Y;
            }

            return rect;
        }

        /// <summary>
        /// Draw tracker for selected object
        /// </summary>
        /// <param name="g"></param>
        public override void DrawTracker(Graphics g)
        {
            if (!Selected)
                return;

            SolidBrush brush = new SolidBrush(Color.Black);
            for (int i = 1; i <= HandleCount; i++)
            {
                g.FillRectangle(brush, GetHandleRectangle(i));
            }
            brush.Dispose();
        }

        public override List<PointF> GetPoints()
        {
            List<PointF> points = new List<PointF>();
            points.Add(startPoint);
            points.Add(endPoint);
            return points;
        }

        public override ParentStyleModel GetStyle()
        {
            return measureLineStyleModel;
        }
    }
}