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

namespace PaintDotNet.Annotation.FieldView
{
    /// <summary>
    /// 矩形视场绘制
    /// </summary>
    public class ViewRectangle : ViewBase
    {
        public override double Width
        {
            get => Rectangle.Width;
            set
            {
                MoveHandleTo(new PointF((float)(value + Points[0].X), 0), 4);
            }
        }

        public override double Height
        {
            get => Rectangle.Height;
            set
            {
                MoveHandleTo(new PointF(0, (float)(value + Points[0].Y)), 6);
            }
        }

        #region Constructor
        public ViewRectangle()
        {
            objectType = DrawClass.View;
            drawToolType = DrawToolType.ViewRectangle;
            Initialize();
        }

        public ViewRectangle(int x, int y) : this()
        {
            for (int i = 0; i < 4; i++) AddPoint(x, y);
        }

        public ViewRectangle(int x, int y, int width, int height) : this()
        {
            AddPoint(new PointF(x, y));
            AddPoint(new PointF(x + width, y));
            AddPoint(new PointF(x + width, y + height));
            AddPoint(new PointF(x, y + height));
        }

        public ViewRectangle(List<PointF> points) : this()
        {
            Points = points;
        }
        #endregion

        #region Handle
        public override int HandleCount
        {
            get
            {
                return 8;
            }
        }

        public override PointF GetHandle(int handleIndex)
        {
            var count = Points.Count;
            var x = Points[(handleIndex / 2) % count].X + Points[(handleIndex - 1) / 2].X;
            var y = Points[(handleIndex / 2) % count].Y + Points[(handleIndex - 1) / 2].Y;
            return new PointF(x / 2, y / 2);
        }

        public override Cursor GetHandleCursor(int handleNumber)
        {
            switch (handleNumber)
            {
                case 1:
                    return Cursors.SizeNWSE;
                case 2:
                    return Cursors.SizeNS;
                case 3:
                    return Cursors.SizeNESW;
                case 4:
                    return Cursors.SizeWE;
                case 5:
                    return Cursors.SizeNWSE;
                case 6:
                    return Cursors.SizeNS;
                case 7:
                    return Cursors.SizeNESW;
                case 8:
                    return Cursors.SizeWE;
                default:
                    return Cursors.Default;
            }
        }
        public override void MoveHandleTo(Point point, int handleNumber)
        {
            MoveHandleTo((PointF)point, handleNumber);
        }

        public override void MoveHandleTo(PointF point, int handleNumber)
        {
            if (handleNumber % 2 == 0)
                MoveEdge(point, handleNumber / 2 - 1);
            else
                MoveCorner(point, handleNumber / 2);
            OnPropertyChanged();
        }

        private void MoveCorner(PointF point, int i)
        {
            Points[i] = point;
            if (i % 2 == 0)
            {
                Points[(i + 1) % 4] = new PointF(Points[(i + 1) % 4].X, point.Y);
                Points[(i + 3) % 4] = new PointF(point.X, Points[(i + 3) % 4].Y);
            }
            else
            {
                Points[(i + 1) % 4] = new PointF(point.X, Points[(i + 1) % 4].Y);
                Points[(i + 3) % 4] = new PointF(Points[(i + 3) % 4].X, point.Y);
            }
        }

        private void MoveEdge(PointF point, int i)
        {
            var tempk = i % 2 != 0 ? K : -1 / K;

            this.Points[i] = BasicCalculationHelper.GetDropFeet(Points[(i + 3) % 4], tempk, point);
            this.Points[(i + 1) % 4] = BasicCalculationHelper.GetDropFeet(Points[(i + 2) % 4], tempk, point);
        }
        #endregion

        #region Clone
        public override DrawObject Clone()
        {
            return Clone(ISurfaceBox);
        }

        public override DrawObject Clone(ISurfaceBox surfaceBox)
        {
            ViewRectangle drawRectangle = new ViewRectangle(Points);
            drawRectangle.ISurfaceBox = surfaceBox;
            drawRectangle.combineMode = combineMode;
            drawRectangle.Color = Color;
            drawRectangle.ID = ID;
            FillDrawObjectFields(drawRectangle);
            return drawRectangle;
        }
        #endregion
    }
}