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

namespace PaintDotNet.Annotation.ImageCollect
{
    /// <summary>
    /// 图像拼接 - 矩形
    /// </summary>
    public class DrawStitchingRectangle : DrawStithchingBase
    {
        /// <summary>
        /// 标注样式信息model
        /// </summary>
        public PolygonRectangle labelRectStyleModel;

        public DrawStitchingRectangle(ISurfaceBox surfaceBox, int x, int y, int width, int height) : base()
        {
            this.deletedPointId = new List<int>();
            this._points = new List<Dictionary<int, object>>();
            this.objectType = DrawClass.Stitch;
            this.drawToolType = DrawToolType.DrawStitchingRectangle;
            this.labelRectStyleModel = surfaceBox.GetLabelStyleModel().polygonRectangle;
            this.ISurfaceBox = surfaceBox;
            this.rectangle.X = x;
            this.rectangle.Y = y;
            this.rectangle.Width = width;
            this.rectangle.Height = height;
            Initialize();
        }

        public DrawStitchingRectangle(ISurfaceBox surfaceBox, List<PointF> points, ParentStyleModel parentStyleModel) : base()
        {
            this.deletedPointId = new List<int>();
            this._points = new List<Dictionary<int, object>>();
            this.objectType = DrawClass.Stitch;
            this.drawToolType = DrawToolType.DrawStitchingRectangle;
            this.ISurfaceBox = surfaceBox;

            labelRectStyleModel = (PolygonRectangle)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()
        {
            DrawStitchingRectangle drawRectangle = new DrawStitchingRectangle(ISurfaceBox, 0, 0, 1, 0);
            drawRectangle.objectType = DrawClass.Stitch;
            drawRectangle.drawToolType = DrawToolType.DrawStitchingRectangle;
            drawRectangle.ISurfaceBox = this.ISurfaceBox;
            drawRectangle.rectangle = this.rectangle;
            FillDrawObjectFields(drawRectangle);
            return drawRectangle;
        }

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

        /// <summary>
        /// Draw rectangle
        /// </summary>
        /// <param name="g"></param>
        public override void Draw(Graphics g)
        {
            Color color = Color.Gray;

            Pen pen = new Pen(color, PenWidth);
            int penWidth = 1; //this.labelRectStyleModel.lineWidth;
            pen.DashStyle = DashStyle.Solid; // (DashStyle)this.labelRectStyleModel.lineStyle;
            pen.Width = penWidth;
            var rettmp = new RectangleF(rectangle.X + OffsetX, rectangle.Y + OffsetY, rectangle.Width, rectangle.Height);
            g.DrawRectangle(pen, DrawStitchingRectangle.GetNormalizedRectangle(rettmp));

            pen.Color = Color.FromArgb(this.labelRectStyleModel.lineColor);

            //fillBrush.Dispose();
            float halfW = rectangle.Width / 2;
            float halfH = rectangle.Height / 2;

            int xNum = CalGridNum(rectangle.Width, ViewWidth);
            int yNum = CalGridNum(rectangle.Height, ViewHeight);
            if (xNum != tiles[0] || yNum != tiles[1])
            {
                tiles[0] = xNum;
                tiles[1] = yNum;
                this.deletedPointId.Clear();
                this.zscan.Clear();
                for (int j = 0; j < tiles[1]; j++)
                {
                    for (int i = 0; i < tiles[0]; i++)
                    {
                        zscan.Add(new ZScanParameter());
                    }
                }
            }

            PointF centerPoint = new PointF();
            centerPoint.X = rectangle.X + halfW;
            centerPoint.Y = rectangle.Y + halfH;

            PointF startPoint = new PointF();
            if (tiles[0] % 2 == 0)
            {
                startPoint.X = (float)centerPoint.X - ViewWidth * (tiles[0] / 2 - Interval / 2 - (tiles[0] / 2 - 1) * Interval);
            }
            else
            {
                int n = (tiles[0] - 1) / 2;
                startPoint.X = (float)centerPoint.X - ViewWidth / 2 - n * ViewWidth * (1 - Interval);
            }
            if (tiles[1] % 2 == 0)
            {
                startPoint.Y = (float)centerPoint.Y - ViewHeight * (tiles[1] / 2 - Interval / 2 - (tiles[1] / 2 - 1) * Interval);
            }
            else
            {
                int n = (tiles[1] - 1) / 2;
                startPoint.Y = (float)centerPoint.Y - ViewHeight / 2 - n * ViewHeight * (1 - Interval);
            }

            rectangleMax = new RectangleF(startPoint, new SizeF(ViewWidth * (tiles[0] - (tiles[0] - 1) * Interval), ViewHeight * (tiles[1] - (tiles[1] - 1) * Interval)));
            _points.Clear();
            List<PointF> tmpList;
            int index = 0;
            for (int j = 0; j < tiles[1]; j++)
            {
                tmpList = new List<PointF>();
                for (int i = 0; i < tiles[0]; i++)
                {
                    float x = startPoint.X + i * (ViewWidth * (1 - Interval));
                    float y = startPoint.Y + j * (ViewHeight * (1 - Interval));
                    tmpList.Add(new PointF(x, y));
                }
                if (j % 2 == 1)
                {
                    for (int m = tmpList.Count - 1; m >= 0; m--)
                    {
                        Dictionary<int, object> myDictionary = new Dictionary<int, object>();

                        myDictionary.Add(0, this.ISurfaceBox.ScalePointToRulerPoint(new PointF(tmpList[m].X, tmpList[m].Y)));
                        if (!deletedPointId.Contains(index))
                        {
                            g.DrawRectangle(pen, tmpList[m].X + OffsetX, tmpList[m].Y + OffsetY, ViewWidth, ViewHeight);
                            myDictionary.Add(1, 0);
                        }
                        else
                        {
                            myDictionary.Add(1, 1);
                        }
                        _points.Add(myDictionary);
                        index++;
                    }
                }
                else
                {
                    for (int m = 0; m < tmpList.Count; m++)
                    {
                        Dictionary<int, object> myDictionary = new Dictionary<int, object>();
                        myDictionary.Add(0, this.ISurfaceBox.ScalePointToRulerPoint(new PointF(tmpList[m].X, tmpList[m].Y)));
                        if (!deletedPointId.Contains(index))
                        {
                            g.DrawRectangle(pen, tmpList[m].X + OffsetX, tmpList[m].Y + OffsetY, ViewWidth, ViewHeight);
                            myDictionary.Add(1, 0);
                        }
                        else
                        {
                            myDictionary.Add(1, 1);
                        }
                        _points.Add(myDictionary);
                        index++;
                    }
                }
            }

            pen.Dispose();

            //OnPropertyChanged();
        }

        private int CalGridNum(float width, int side)
        {
            for (int i = 0; i <= 10000; i++)
            {
                if ((i - (i + 1) * Interval) * side > width)
                {
                    return i;
                }
            }
            return 0;
        }

        protected void SetRectangle(float x, float y, float width, float height)
        {
            this.rectangle.X = x;
            this.rectangle.Y = y;
            this.rectangle.Width = width;
            this.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 = this.rectangle.X + this.rectangle.Width / 2;
            yCenter = this.rectangle.Y + this.rectangle.Height / 2;
            x = this.rectangle.X;
            y = this.rectangle.Y;

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

        public override Rectangle GetHandleRectangle(int handleNumber)
        {
            if (lockType == LockType.SIZE)
            {

                return new Rectangle();
            }
            else if (lockType == LockType.AREA)
            {
                if (handleNumber % 2 == 1)
                {
                    return new Rectangle();
                }
            }
            PointF point = GetHandle(handleNumber);

            return new Rectangle((int)(point.X - 100), (int)(point.Y - 100), 201, 201);
        }

        /// <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;
            }
            float length = 0f;
            float xchange = 0f;
            if (lockType == LockType.AREA)
            {

                switch (handleNumber)
                {

                    case 2:
                        length = top - Rectangle.Top;
                        xchange = (Rectangle.Width - (Rectangle.Width * Rectangle.Height) / (Rectangle.Height + length)) / 2;
                        left = left + xchange;
                        right = right - xchange;
                        break;
                    case 4:
                        length = right - Rectangle.Right;
                        xchange = (Rectangle.Height - (Rectangle.Width * Rectangle.Height) / (Rectangle.Width + length)) / 2;
                        top = top + xchange;
                        bottom = bottom - xchange;
                        break;
                    case 6:
                        length = bottom - Rectangle.Bottom;
                        xchange = (Rectangle.Width - (Rectangle.Width * Rectangle.Height) / (Rectangle.Height + length)) / 2;
                        left = left + xchange;
                        right = right - xchange;
                        break;
                    case 8:
                        length = left - Rectangle.Left;
                        xchange = (Rectangle.Height - (Rectangle.Width * Rectangle.Height) / (Rectangle.Width + length)) / 2;
                        top = top + xchange;
                        bottom = bottom - xchange;
                        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 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 labelRectStyleModel;
        }
    }
}