using PaintDotNet.Annotation.Enum;
using PaintDotNet.Base.SettingModel;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
using static PaintDotNet.Base.SettingModel.LabelStyleModel;

namespace PaintDotNet.Annotation.Label
{
    /// <summary>
    /// 标注->圆->椭圆
    /// </summary>
    public class DrawEllipse : DrawObject
    {
        /// <summary>
        /// 标注样式信息model
        /// </summary>
        public Oval labelOvalStyleModel;

        public DrawEllipse(ISurfaceBox surfaceBox, int x, int y, int width, int height) : base()
        {
            this.objectType = DrawClass.Label;
            this.drawToolType = DrawToolType.DrawEllipse;

            labelOvalStyleModel = surfaceBox.GetLabelStyleModel().ovalModel;
            rectangle.X = x;
            rectangle.Y = y;
            rectangle.Width = width;
            rectangle.Height = height;
            Initialize();
        }

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

            labelOvalStyleModel = (Oval)parentStyleModel;
            rectangle.X = points[0].X;
            rectangle.Y = points[0].Y;
            rectangle.Width = points[1].X - points[0].X;
            rectangle.Height = points[1].Y - points[0].Y;
        }

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

        public override DrawObject Clone(ISurfaceBox surfaceBox)
        {
            DrawEllipse drawRectangle = new DrawEllipse(surfaceBox, 0, 0, 1, 0);
            drawRectangle.objectType = DrawClass.Label;
            drawRectangle.drawToolType = DrawToolType.DrawEllipse;
            drawRectangle.ISurfaceBox = surfaceBox;
            drawRectangle.rectangle = this.rectangle;
            drawRectangle.labelOvalStyleModel = this.labelOvalStyleModel;
            FillDrawObjectFields(drawRectangle);
            return drawRectangle;
        }

        /// <summary>
        /// Draw rectangle
        /// </summary>
        /// <param name="g"></param>
        public override void Draw(Graphics g)
        {
            Color color = Color.FromArgb(this.labelOvalStyleModel.lineColor);
            int penWidth = this.labelOvalStyleModel.lineWidth;
            Pen pen = new Pen(color, penWidth);
            pen.DashStyle = (DashStyle)this.labelOvalStyleModel.lineStyle;
            Color fillColor = Color.FromArgb(this.labelOvalStyleModel.fillColor);
            SolidBrush fillBrush = new SolidBrush(fillColor);
            
            g.FillEllipse(fillBrush,DrawRectangle.GetNormalizedRectangle(Rectangle));
            g.DrawEllipse(pen, DrawRectangle.GetNormalizedRectangle(Rectangle));

            pen.Dispose();
            fillBrush.Dispose();
        }

        protected void SetRectangle(float x, float y, float width, float height)
        {
            rectangle.X = x;
            rectangle.Y = y;
            rectangle.Width = width;
            rectangle.Height = height;
        }


        /// <summary>
        /// Get number of handles
        /// </summary>
        public override int HandleCount
        {
            get
            {
                return 8;
            }
        }


        /// <summary>
        /// Get handle pointscroll by 1-based number
        /// </summary>
        /// <param name="handleNumber"></param>
        /// <returns></returns>
        public override PointF GetHandle(int handleNumber)
        {
            float x, y, xCenter, yCenter;

            xCenter = rectangle.X + rectangle.Width / 2;
            yCenter = rectangle.Y + rectangle.Height / 2;
            x = rectangle.X;
            y = rectangle.Y;

            switch (handleNumber)
            {
                case 1:
                    x = rectangle.X;
                    y = rectangle.Y;
                    break;
                case 2:
                    x = xCenter;
                    y = rectangle.Y;
                    break;
                case 3:
                    x = rectangle.Right;
                    y = rectangle.Y;
                    break;
                case 4:
                    x = rectangle.Right;
                    y = yCenter;
                    break;
                case 5:
                    x = rectangle.Right;
                    y = rectangle.Bottom;
                    break;
                case 6:
                    x = xCenter;
                    y = rectangle.Bottom;
                    break;
                case 7:
                    x = rectangle.X;
                    y = rectangle.Bottom;
                    break;
                case 8:
                    x = rectangle.X;
                    y = yCenter;
                    break;
            }

            return new PointF(x, y);

        }

        /// <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)
        {
            return rectangle.Contains(point);
        }

        /// <summary>
        /// Get cursor for the handle
        /// </summary>
        /// <param name="handleNumber"></param>
        /// <returns></returns>
        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;
            }
        }

        /// <summary>
        /// Move handle to new pointscroll (resizing)
        /// </summary>
        /// <param name="pointscroll"></param>
        /// <param name="handleNumber"></param>
        public override void MoveHandleTo(Point point, int handleNumber)
        {
            float left = Rectangle.Left;
            float top = Rectangle.Top;
            float right = Rectangle.Right;
            float bottom = Rectangle.Bottom;

            switch (handleNumber)
            {
                case 1:
                    left = point.X;
                    top = point.Y;
                    break;
                case 2:
                    top = point.Y;
                    break;
                case 3:
                    right = point.X;
                    top = point.Y;
                    break;
                case 4:
                    right = point.X;
                    break;
                case 5:
                    right = point.X;
                    bottom = point.Y;
                    break;
                case 6:
                    bottom = point.Y;
                    break;
                case 7:
                    left = point.X;
                    bottom = point.Y;
                    break;
                case 8:
                    left = point.X;
                    break;
            }

            SetRectangle(left, top, right - left, bottom - top);
        }

        public override bool IntersectsWith(Rectangle rectangle)
        {
            return Rectangle.IntersectsWith(rectangle);
        }

        /// <summary>
        /// Move object
        /// </summary>
        /// <param name="deltaX"></param>
        /// <param name="deltaY"></param>
        public override void Move(int deltaX, int deltaY)
        {
            int x = ISurfaceBox.UnscaleScalar(deltaX);
            int y = ISurfaceBox.UnscaleScalar(deltaY);

            rectangle.X += x;
            rectangle.Y += y;
        }

        public override void Normalize()
        {
            rectangle = GetNormalizedRectangle(rectangle);
        }

        public override RectangleF GetBoundingBox()
        {
            return rectangle;
        }

        public override List<PointF> GetPoints()
        {
            List<PointF> points = new List<PointF>();
            points.Add(new PointF(rectangle.X, rectangle.Y));
            points.Add(new PointF(rectangle.Right, rectangle.Bottom));
            return points;
        }

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