using System;
using System.Drawing;
using ESRI.ArcGIS.Display;
using ESRI.ArcGIS.esriSystem;
using ESRI.ArcGIS.Geometry;

namespace KGIS.Plugin.LayerProperty.Utils
{
    public class StyleGalleryItemView
    {
        private static IEnvelope Envelope4BatchDraw;
        private static ITransformation Transformation4BatchDraw;
        private static IGeometry Geometry4BatchDraw;
        public static Bitmap StyleGalleryItemToBmp(int iWidth, int iHeight, IStyleGalleryClass mStyleGlyCs, IStyleGalleryItem mStyleGlyItem)
        {
            //if (mStyleGlyItem.Item is ISymbol)
            //{
            //    return StyleGalleryItemView.SymbolToBitmap(iWidth, iHeight, mStyleGlyItem.Item as ISymbol);
            //}
            Bitmap bitmap = new Bitmap(iWidth, iHeight);
            Graphics graphics = Graphics.FromImage(bitmap);
            IntPtr hdc = IntPtr.Zero;
            try
            {
                hdc = graphics.GetHdc();
            }
            catch
            {
            }
            try
            {
                tagRECT tagRECT = default(tagRECT);
                tagRECT.right = bitmap.Width;
                tagRECT.bottom = bitmap.Height;
                mStyleGlyCs.Preview(mStyleGlyItem.Item, hdc.ToInt32(), ref tagRECT);
                if (hdc.ToInt32() != 0)
                {
                    graphics.ReleaseHdc(hdc);
                    graphics.Dispose();
                }
            }
            catch (Exception ex)
            {
                if (hdc.ToInt32() != 0)
                {
                    graphics.ReleaseHdc(hdc);
                    graphics.Dispose();
                }
                //CoreUtil.AddException(ex);
            }
            return bitmap;
        }
        public static Bitmap SymbolToBitmap(int iWidth, int iHeight, ISymbol pSymbol)
        {
            StyleGalleryItemView.ResetBatchDraw();
            Win32Util.InitBitmap(iWidth, iHeight);
            StyleGalleryItemView.DrawSymbol(Win32Util.InnerDC, iWidth, iHeight, pSymbol, 2);
            Bitmap bitmap = Win32Util.GetBitmap(iWidth, iHeight);
            Win32Util.ReleaseDC();
            return bitmap;
        }
        public static Bitmap StyleGalleryItemToBmp(int iHeight, IStyleGalleryClass mStyleGlyCs, IStyleGalleryItem mStyleGlyItem)
        {
            int iWidth = (int)(mStyleGlyCs.PreviewRatio * (double)iHeight);
            return StyleGalleryItemView.StyleGalleryItemToBmp(iWidth, iHeight, mStyleGlyCs, mStyleGlyItem);
        }
        public static Bitmap GetSymbolBitMap(int width, int height, IStyleGalleryClass symbologyStyleClass, ISymbol pSymbol)
        {
            try
            {
                return StyleGalleryItemView.StyleGalleryItemToBmp(width, height, symbologyStyleClass, new ServerStyleGalleryItemClass
                {
                    Item = pSymbol
                });
            }
            catch (Exception ex)
            {
                //CoreUtil.AddException(ex);
            }
            return null;
        }
        public static Bitmap GetSymbolBitMap(int height, IStyleGalleryClass symbologyStyleClass, ISymbol pSymbol)
        {
            try
            {
                return StyleGalleryItemView.StyleGalleryItemToBmp(height, symbologyStyleClass, new ServerStyleGalleryItemClass
                {
                    Item = pSymbol
                });
            }
            catch (Exception ex)
            {
                //CoreUtil.AddException(ex);
            }
            return null;
        }
        public static Image CreatePictureFromSymbol(ISymbol pSymbol, double dblWidth, double dblHeight, double dblGap)
        {
            Bitmap bitmap = new Bitmap((int)dblWidth, (int)dblHeight);
            Graphics graphics = Graphics.FromImage(bitmap);
            IntPtr hdc = (IntPtr)0;
            hdc = graphics.GetHdc();
            StyleGalleryItemView.DrawToDC(hdc.ToInt32(), dblWidth, dblHeight, dblGap, pSymbol, false);
            graphics.ReleaseHdc(hdc);
            graphics.Dispose();
            return bitmap;
        }
        public static Image CreatePictureFromSymbol(ISymbol pSymbol, double dblWidth, double dblHeight, double dblGap, bool blnLine)
        {
            Bitmap bitmap = new Bitmap((int)dblWidth, (int)dblHeight);
            Graphics graphics = Graphics.FromImage(bitmap);
            IntPtr hdc = (IntPtr)0;
            hdc = graphics.GetHdc();
            StyleGalleryItemView.DrawToDC(hdc.ToInt32(), dblWidth, dblHeight, dblGap, pSymbol, blnLine);
            graphics.ReleaseHdc(hdc);
            graphics.Dispose();
            return bitmap;
        }
        private static void DrawToDC(int hDC, double dblWidth, double dblHeight, double dblGap, ISymbol pSymbol, bool blnLine)
        {
            IEnvelope envelope = new EnvelopeClass();
            envelope.PutCoords(dblGap, dblGap, dblWidth - dblGap, dblHeight - dblGap);
            ITransformation transformation = StyleGalleryItemView.CreateTransFromDC(hDC, dblWidth, dblHeight);
            IGeometry geometry = StyleGalleryItemView.CreateSymShape(pSymbol, envelope, blnLine);
            pSymbol.SetupDC(hDC, transformation);
            pSymbol.Draw(geometry);
            pSymbol.ResetDC();
        }
        private static ITransformation CreateTransFromDC(int hDC, double dblWidth, double dblHeight)
        {
            IEnvelope envelope = new EnvelopeClass();
            envelope.PutCoords(0.0, 0.0, dblWidth, dblHeight);
            tagRECT tagRECT = default(tagRECT);
            tagRECT.left = 0;
            tagRECT.top = 0;
            tagRECT.right = (int)dblWidth;
            tagRECT.bottom = (int)dblHeight;
            return new DisplayTransformationClass
            {
                VisibleBounds = envelope,
                Bounds = envelope,
                //DeviceFrame = ref tagRECT,
                Resolution = 96.0
            };
        }
        private static IGeometry CreateSymShape(ISymbol pSymbol, IEnvelope pEnvelope, bool blnLine)
        {
            if (pSymbol is IMarkerSymbol)
            {
                IArea area = pEnvelope as IArea;
                return area.Centroid;
            }
            if (!(pSymbol is ILineSymbol) && !(pSymbol is ITextSymbol))
            {
                return pEnvelope;
            }
            if (blnLine)
            {
                IPointCollection pointCollection = new PolylineClass();
                IPoint point = new PointClass();
                point.PutCoords(pEnvelope.XMin, pEnvelope.YMax);
                object missing = Type.Missing;
                pointCollection.AddPoint(point, ref missing, ref missing);
                point = new PointClass();
                point.PutCoords(pEnvelope.XMin + pEnvelope.Width / 3.0, pEnvelope.YMin);
                missing = Type.Missing;
                pointCollection.AddPoint(point, ref missing, ref missing);
                point = new PointClass();
                point.PutCoords(pEnvelope.XMax - pEnvelope.Width / 3.0, pEnvelope.YMax);
                missing = Type.Missing;
                pointCollection.AddPoint(point, ref missing, ref missing);
                point = new PointClass();
                point.PutCoords(pEnvelope.XMax, pEnvelope.YMin);
                missing = Type.Missing;
                pointCollection.AddPoint(point, ref missing, ref missing);
                return pointCollection as IPolyline;
            }
            IPolyline polyline = new PolylineClass();
            IPoint point2 = new PointClass();
            point2.PutCoords(pEnvelope.XMin, pEnvelope.YMin + pEnvelope.Height / 2.0);
            IPoint point3 = new PointClass();
            point3.PutCoords(pEnvelope.XMax, pEnvelope.YMin + pEnvelope.Height / 2.0);
            polyline.FromPoint = point2;
            polyline.ToPoint = point3;
            return polyline;
        }
        public static void ResetBatchDraw()
        {
            StyleGalleryItemView.Envelope4BatchDraw = null;
            StyleGalleryItemView.Transformation4BatchDraw = null;
            StyleGalleryItemView.Geometry4BatchDraw = null;
        }
        public static void DrawSymbol(int hDC, int w, int h, ISymbol pSymbol, int gap)
        {
            Win32Util.ClearDC(hDC, Color.Transparent, 0, 0, w, h);
            if (StyleGalleryItemView.Envelope4BatchDraw == null)
            {
                StyleGalleryItemView.Envelope4BatchDraw = new EnvelopeClass();
            }
            StyleGalleryItemView.Envelope4BatchDraw.PutCoords((double)gap, (double)gap, (double)(w - gap), (double)(h - gap));
            if (StyleGalleryItemView.Transformation4BatchDraw == null)
            {
                StyleGalleryItemView.Transformation4BatchDraw = StyleGalleryItemView.CreateTransFromDC(hDC, (double)w, (double)h);
            }
            if (StyleGalleryItemView.Geometry4BatchDraw == null)
            {
                StyleGalleryItemView.Geometry4BatchDraw = StyleGalleryItemView.CreateSymShape(pSymbol, StyleGalleryItemView.Envelope4BatchDraw);
            }
            try
            {
                if (pSymbol is ITextSymbol && pSymbol is ITextSymbol)
                {
                    ((ITextSymbol)pSymbol).Text = "AaBbYyZz";
                }
                pSymbol.SetupDC(hDC, StyleGalleryItemView.Transformation4BatchDraw);
                pSymbol.Draw(StyleGalleryItemView.Geometry4BatchDraw);
            }
            catch (Exception value)
            {
                Console.Write(value);
            }
            finally
            {
                pSymbol.ResetDC();
            }
        }
        private static IGeometry CreateSymShape(ISymbol pSymbol, IEnvelope pEnvelope)
        {
            if (pSymbol is IMarkerSymbol)
            {
                IArea area = (IArea)pEnvelope;
                return area.Centroid;
            }
            if (pSymbol is ILineSymbol || pSymbol is ITextSymbol)
            {
                IPolyline polyline = (IPolyline)new PolylineClass();
                IPoint point = new PointClass();
                point.X = (pEnvelope.LowerLeft.X + pEnvelope.UpperLeft.X) / 2.0;
                point.Y = (pEnvelope.LowerLeft.Y + pEnvelope.UpperLeft.Y) / 2.0;
                polyline.FromPoint = point;
                point.X = (pEnvelope.LowerRight.X + pEnvelope.UpperRight.X) / 2.0;
                point.Y = (pEnvelope.LowerRight.Y + pEnvelope.UpperRight.Y) / 2.0;
                polyline.ToPoint = point;
                return polyline;
            }
            return pEnvelope;
        }
    }
}