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

namespace PaintDotNet.Annotation.Label
{
    /// <summary>
    /// 标注->水印
    /// </summary>
    public class DrawWaterMark : DrawObject
    {
        private static Cursor handleCursor = new Cursor(PdnResources.GetResourceStream("Cursors.AnnotationPolyHandle.cur"));

        /// <summary>
        /// 标注样式信息model
        /// </summary>
        public WatermarkModel waterMarkModel;

        public DrawWaterMark(ISurfaceBox surfaceBox) : base()
        {
            this.objectType = DrawClass.Label;
            this.drawToolType = DrawToolType.DrawWaterMark;

            waterMarkModel = surfaceBox.GetWatermarkModel();
            startPoint = new PointF(0, 0);

            Initialize();
        }

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

            waterMarkModel = (WatermarkModel)parentStyleModel;
            startPoint = points[0];
        }

        /// <summary>
        /// Clone this instance
        /// </summary>
        public override DrawObject Clone()
        {
            DrawWaterMark waterMark = new DrawWaterMark(ISurfaceBox);
            waterMark.objectType = DrawClass.Label;
            waterMark.drawToolType = DrawToolType.DrawWaterMark;
            waterMark.ISurfaceBox = ISurfaceBox;
            waterMark.startPoint = this.startPoint;
            FillDrawObjectFields(waterMark);
            return waterMark;
        }

        public override DrawObject Clone(ISurfaceBox surfaceBox)
        {
            DrawWaterMark waterMark = new DrawWaterMark(surfaceBox);
            waterMark.objectType = DrawClass.Label;
            waterMark.drawToolType = DrawToolType.DrawWaterMark;
            waterMark.ISurfaceBox = surfaceBox;
            waterMark.startPoint = this.startPoint;
            waterMark.waterMarkModel = this.waterMarkModel;
            FillDrawObjectFields(waterMark);
            return waterMark;
        }

        public override void Draw(Graphics g)
        {
            g.SmoothingMode = SmoothingMode.AntiAlias;

            SizeF windowSize = this.ISurfaceBox.GetDocumentSize();//窗体尺寸

            int waterMarkType = this.waterMarkModel.watermarkType;//水印类型

            string waterMarkStr = this.waterMarkModel.content;//水印内容
            int waterMarkMargin = this.waterMarkModel.margin;//距边界值
            int waterMarkSpread = this.waterMarkModel.spread;//平铺:1平铺;2非平铺
            int waterMarkTransparency = this.waterMarkModel.transparency;//透明度

            //水印位置
            int waterMarkPosition = this.waterMarkModel.position;

            if (waterMarkType == 1)//文字水印
            {
                int waterMarkDirection = this.waterMarkModel.direction;//方向:1水平;2垂直;3向前倾斜;4向后倾斜

                FontStyle fontStyle = new FontStyle();
                int waterMarkBold = this.waterMarkModel.bold;//粗体
                int waterMarkItalic = this.waterMarkModel.italic;//斜体
                if (waterMarkBold == 1 && waterMarkItalic != 1)
                {
                    fontStyle = FontStyle.Bold;
                }   
                if (waterMarkItalic == 1 && waterMarkBold != 1)
                {
                    fontStyle = FontStyle.Italic;
                }
                if (waterMarkBold == 1 && waterMarkItalic == 1)
                {
                    fontStyle = FontStyle.Bold | FontStyle.Italic;
                }

                Font textfont = new Font(this.waterMarkModel.typeface, this.waterMarkModel.fontSize, fontStyle);//配置文件的字号有问题
                //Font textfont = new Font(this.waterMarkModel.typeface, 12, fontStyle);//强写的字号
                Color oldColor = Color.FromArgb(this.waterMarkModel.color);
                Color textColor = Color.FromArgb(waterMarkTransparency, oldColor.R, oldColor.G, oldColor.B);//重新赋值透明度
                Brush textbrush = new SolidBrush(textColor);
                Size fontSize = g.MeasureString(waterMarkStr, textfont).ToSize();

                switch (waterMarkPosition)
                {
                    case 1://左上
                        startPoint.X = waterMarkMargin;
                        startPoint.Y = waterMarkMargin;
                        break;
                    case 2://中上
                        startPoint.X = windowSize.Width / 2 - fontSize.Width / 2;
                        startPoint.Y = waterMarkMargin;
                        break;
                    case 3://右上
                        startPoint.X = windowSize.Width - fontSize.Width - waterMarkMargin;
                        startPoint.Y = waterMarkMargin;
                        break;
                    case 4://左中
                        startPoint.X = waterMarkMargin;
                        startPoint.Y = windowSize.Height / 2 - fontSize.Height / 2;
                        break;
                    case 5://中
                        startPoint.X = windowSize.Width / 2 - fontSize.Width / 2;
                        startPoint.Y = windowSize.Height / 2 - fontSize.Height / 2;
                        break;
                    case 6://右中
                        startPoint.X = windowSize.Width - fontSize.Width - waterMarkMargin;
                        startPoint.Y = windowSize.Height / 2 - fontSize.Height / 2;
                        break;
                    case 7://左下
                        startPoint.X = waterMarkMargin;
                        startPoint.Y = windowSize.Height - fontSize.Height - waterMarkMargin;
                        break;
                    case 8://中下
                        startPoint.X = windowSize.Width / 2 - fontSize.Width / 2;
                        startPoint.Y = windowSize.Height - fontSize.Height - waterMarkMargin;
                        break;
                    case 9://右下
                        startPoint.X = windowSize.Width - fontSize.Width - waterMarkMargin;
                        startPoint.Y = windowSize.Height - fontSize.Height - waterMarkMargin;
                        break;
                }

                if (waterMarkStr != null && waterMarkStr != "")
                {
                    //画字符串的方式实现,旋转后会飞出画布
                    //Matrix matrix = g.Transform;
                    //Matrix mtxSave = g.Transform;
                    //int angle = 0;
                    //switch (waterMarkDirection)
                    //{
                    //    case 2://垂直
                    //        angle = 90;
                    //        break;
                    //    case 3://向前倾斜
                    //        angle = -45;
                    //        break;
                    //    case 4://向后倾斜
                    //        angle = 45;
                    //        break;
                    //}
                    //matrix.RotateAt(angle, new PointF(float.Parse((startPoint.X + fontSize.Width / 2).ToString()), float.Parse((startPoint.Y + fontSize.Height / 2).ToString())));
                    //g.Transform = matrix;
                    //g.DrawString(waterMarkStr, textfont, textbrush, startPoint);
                    //g.Transform = mtxSave;
                    //matrix.Dispose();

                    //画字符串的方式平铺,同样会飞出画布
                    //for (int x = 0; x < windowSize.Width; x += (fontSize.Width + 15))
                    //{
                    //    for (int y = 0; y < windowSize.Height; y += (fontSize.Height + 30))
                    //    {
                    //        g.DrawString(waterMarkStr, textfont, textbrush, x, y);
                    //    }
                    //}

                    //文字转图片
                    Rectangle fontRectangle;
                    if (waterMarkSpread == 1)
                    {
                        fontRectangle = new Rectangle(0, 0, fontSize.Width + 15, fontSize.Height + 30);//平铺情况下给图片加间距
                    }
                    else
                    {
                        fontRectangle = new Rectangle(0, 0, fontSize.Width + 15, fontSize.Height + 30);
                    }
                    Bitmap btWord = new Bitmap(fontRectangle.Width, fontRectangle.Height);
                    Graphics newImg = Graphics.FromImage(btWord);
                    newImg.SmoothingMode = SmoothingMode.AntiAlias;
                    //newImg.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAliasGridFit;
                    newImg.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;
                    newImg.FillRectangle(new SolidBrush(Color.FromArgb(0, Color.Green)), fontRectangle);
                    newImg.DrawString(waterMarkStr, textfont, textbrush, fontRectangle);

                    //g.DrawString(waterMarkStr, textfont, textbrush, startPoint.X - btWord.Width, startPoint.Y);
                    //g.DrawImage(btWord, startPoint);

                    //填充画布
                    Rectangle imgRec = new Rectangle(0, 0, btWord.Width, btWord.Height);
                    TextureBrush tb = new TextureBrush(btWord, imgRec);
                    if (waterMarkSpread == 1)
                    {
                        tb.WrapMode = WrapMode.Tile;//平铺填充模式
                    }
                    else
                    {
                        tb.TranslateTransform(startPoint.X, startPoint.Y);
                        tb.WrapMode = WrapMode.Clamp;//非平铺
                    }
                    
                    switch (waterMarkDirection)
                    {
                        case 2://垂直
                            tb.RotateTransform(90);
                            break;
                        case 3://向前倾斜
                            tb.RotateTransform(-45);
                            break;
                        case 4://向后倾斜
                            tb.RotateTransform(45);
                            break;
                    }

                    g.FillRectangle(tb, new RectangleF(0, 0, windowSize.Width - 1, windowSize.Height - 1));

                    btWord.Dispose();
                    newImg.Dispose();
                    tb.Dispose();
                }

                textbrush.Dispose();
            }

            if (waterMarkType == 2)//图片水印
            {
                if (waterMarkStr != null && waterMarkStr != "")
                {
                    try 
                    {
                        //设置透明度
                        float imgTransparency = float.Parse(waterMarkTransparency.ToString()) / 255;
                        float[][] nArray ={ new float[] {1, 0, 0, 0, 0},
                                        new float[] {0, 1, 0, 0, 0},
                                        new float[] {0, 0, 1, 0, 0},
                                        new float[] {0, 0, 0, imgTransparency, 0},
                                        new float[] {0, 0, 0, 0, 1}};
                        ColorMatrix matrix = new ColorMatrix(nArray);
                        ImageAttributes attributes = new ImageAttributes();
                        attributes.SetColorMatrix(matrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);

                        Image srcImage = Image.FromFile(waterMarkStr);

                        if (waterMarkSpread == 1)
                        {
                            Rectangle imgRec = new Rectangle(0, 0, srcImage.Width, srcImage.Height);//仅为实例化填充对象时可添加透明度所创建的矩形
                            TextureBrush tb = new TextureBrush(srcImage, imgRec, attributes);
                            tb.WrapMode = WrapMode.Tile;//平铺填充模式
                            g.FillRectangle(tb, new RectangleF(0, 0, windowSize.Width - 1, windowSize.Height - 1));
                        }
                        else
                        {
                            switch (waterMarkPosition)
                            {
                                case 1://左上
                                    startPoint.X = waterMarkMargin;
                                    startPoint.Y = waterMarkMargin;
                                    break;
                                case 2://中上
                                    startPoint.X = windowSize.Width / 2 - srcImage.Width / 2;
                                    startPoint.Y = waterMarkMargin;
                                    break;
                                case 3://右上
                                    startPoint.X = windowSize.Width - srcImage.Width - waterMarkMargin;
                                    startPoint.Y = waterMarkMargin;
                                    break;
                                case 4://左中
                                    startPoint.X = waterMarkMargin;
                                    startPoint.Y = windowSize.Height / 2 - srcImage.Height / 2;
                                    break;
                                case 5://中
                                    startPoint.X = windowSize.Width / 2 - srcImage.Width / 2;
                                    startPoint.Y = windowSize.Height / 2 - srcImage.Height / 2;
                                    break;
                                case 6://右中
                                    startPoint.X = windowSize.Width - srcImage.Width - waterMarkMargin;
                                    startPoint.Y = windowSize.Height / 2 - srcImage.Height / 2;
                                    break;
                                case 7://左下
                                    startPoint.X = waterMarkMargin;
                                    startPoint.Y = windowSize.Height - srcImage.Height - waterMarkMargin;
                                    break;
                                case 8://中下
                                    startPoint.X = windowSize.Width / 2 - srcImage.Width / 2;
                                    startPoint.Y = windowSize.Height - srcImage.Height - waterMarkMargin;
                                    break;
                                case 9://右下
                                    startPoint.X = windowSize.Width - srcImage.Width - waterMarkMargin;
                                    startPoint.Y = windowSize.Height - srcImage.Height - waterMarkMargin;
                                    break;
                            }
                            g.DrawImage(srcImage, new Rectangle(Convert.ToInt32(startPoint.X), Convert.ToInt32(startPoint.Y), srcImage.Width, srcImage.Height), 0, 0, srcImage.Width, srcImage.Height, GraphicsUnit.Pixel, attributes);

                            attributes.Dispose();
                            srcImage.Dispose();
                        }
                    }
                    catch(Exception)
                    {

                    }
                }
            }
        }

        public override int HandleCount
        {
            get
            {
                return 0;
            }
        }

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

        /// <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);
        }

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

        public override Cursor GetHandleCursor(int handleNumber)
        {
            return Cursors.Default;
        }

        public override void MoveHandleTo(Point point, int handleNumber)
        {
             
        }

        public override void Move(int deltaX, int deltaY)
        {
            
        }

        public override RectangleF GetBoundingBox()
        {
            return rectangle;
        }

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

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