using System;
using System.Collections.Generic;
using System.Configuration;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.IO;
using System.Drawing;
using System.Drawing.Imaging;

public partial class admin_filemanager_upload : System.Web.UI.Page
{
    //限制寬度尺寸不得超過1024
    const double maxSize = 1024;
    string scc = ConfigurationManager.AppSettings["shopCarCode"].ToString();


    protected void Page_Load(object sender, EventArgs e)
    {
        MyWeb.admin admin = new MyWeb.admin();
        if (MyWeb.admin.chkAdmIP && (MyWeb.admin.chkTwIP || MyWeb.admin.chkAdmIP_Enable) && admin.isLoign())
        {
            if (admin.info.login_ip != MyWeb.admin.MyIP)
            {
                Response.Clear();
                Response.StatusCode = 404;
                Response.End();
            }
            try
            {
                MyWeb.fileSystem fileSystem = new MyWeb.fileSystem();
                HttpPostedFile jpeg_image_upload = Request.Files["Filedata"];
                string up_path = Server.MapPath("~/upload/" + Convert.ToString(Request["dirname"]).Replace("../", ""));
                DirectoryInfo dir = new DirectoryInfo(up_path);
                if (!dir.Exists) { dir.Create(); }

                string savePath = up_path + (up_path.Substring(up_path.Length - 1, 1) != "/" ? "/" : "") + jpeg_image_upload.FileName.Replace(" ", "_");

                int re = 0;
                while (true)
                {
                    FileInfo fInfo = new FileInfo(savePath);
                    if (fInfo.Exists)
                    {
                        string fname = jpeg_image_upload.FileName.Replace(" ", "_");
                        re++;
                        string[] f = fname.Split('.');
                        fname = f[0] + "(" + re.ToString() + ")" + (f.Length > 1 ? "." + f[1] : "");
                        savePath = up_path + (up_path.Substring(up_path.Length - 1, 1) != "/" ? "/" : "") + fname;
                    }
                    else { break; }
                }

                if (fileSystem.isPhoto(jpeg_image_upload.FileName))
                {
                    string[] n = jpeg_image_upload.FileName.Split('.');
                    System.Drawing.Image Bm = new System.Drawing.Bitmap(jpeg_image_upload.InputStream);
                                   
                    foreach (PropertyItem pi in Bm.PropertyItems)
                    {
                        // orientation tag id is 274                        
                        if (pi.Id == 274)
                        {
                            switch (pi.Value[0])
                            {
                                case 2:
                                    Bm.RotateFlip(RotateFlipType.RotateNoneFlipX);
                                    break;
                                case 3:
                                    Bm.RotateFlip(RotateFlipType.Rotate180FlipNone);
                                    break;
                                case 4:
                                    Bm.RotateFlip(RotateFlipType.RotateNoneFlipY);
                                    break;
                                case 5:
                                    Bm.RotateFlip(RotateFlipType.Rotate90FlipX);
                                    break;
                                case 6:
                                    Bm.RotateFlip(RotateFlipType.Rotate90FlipNone);
                                    break;
                                case 7:
                                    Bm.RotateFlip(RotateFlipType.Rotate270FlipX);
                                    break;
                                case 8:
                                    Bm.RotateFlip(RotateFlipType.Rotate270FlipNone);
                                    break;
                                default:
                                    break;
                            }
                        }
                    }

                    double newWidth = Bm.Width;
                    double newHeight = Bm.Height;
                    if (Bm.Width > maxSize)
                    {
                        newWidth = maxSize;
                        newHeight = maxSize / Bm.Width;
                        newHeight = newHeight * Bm.Height;
                    }
                    /*if (Bm.Width > Bm.Height)
                    {
                        if (Bm.Width > maxSize)
                        {
                            newWidth = maxSize;
                            newHeight = maxSize / Bm.Width;
                            newHeight = newHeight * Bm.Height;
                        }
                    }
                    else
                    {
                        if (Bm.Height > maxSize)
                        {
                            newHeight = maxSize;                        
                            newWidth =  maxSize / Bm.Height;
                            newWidth = newWidth * Bm.Width;
                        }
                    }*/

                    if (newWidth > 0 & newHeight > 0)
                    {
                        string picType = n[n.Length - 1].ToLower();
                        if (picType == "jpg") { picType = "jpeg"; }
                        System.Drawing.Image New_Image = new Bitmap((int)newWidth, (int)newHeight);
                        Graphics ObjGraphics = Graphics.FromImage(New_Image);

                        MyWeb.global global = new MyWeb.global();

                        ObjGraphics.InterpolationMode = global.InterpolationMode;
                        ObjGraphics.SmoothingMode = global.SmoothingMode;
                        ObjGraphics.CompositingQuality = global.CompositingQuality;	

                        if (picType == "png")
                        {
                            ObjGraphics.Clear(Color.Transparent);    //清空Graphics, 以透明色填充
                        }
                        else
                        {
                            ObjGraphics.Clear(Color.White);         //清空Graphics, 以白色填充
                        }

                        //在指定位置按指定大小繪制原圖片的片段
                        ObjGraphics.DrawImage(Bm, new Rectangle(0, 0, (int)newWidth, (int)newHeight), new Rectangle(0, 0, Bm.Width, Bm.Height), GraphicsUnit.Pixel);

                        if (fileSystem.WatermarkMode == "2")
                        {
                            string FileNameAndPath = HttpContext.Current.Server.MapPath(fileSystem.WatermarkPath);
                            System.Drawing.Image Watermark_Image = System.Drawing.Image.FromFile(FileNameAndPath);
                            int w_Width = Convert.ToInt32(Math.Round(Convert.ToDouble(newWidth) * 0.8));
                            int w_Height = Convert.ToInt32(Watermark_Image.Height * (Convert.ToDouble(w_Width) / Convert.ToDouble(Watermark_Image.Width)));
                            int w_myX = ((int)newWidth - w_Width) / 2;   //浮水印水平置中
                            int w_myY = ((int)newHeight - w_Height) / 2 + w_Height;   //浮水印水平垂直置中向下偏移一個高度
                            var colorMatrix = new ColorMatrix();
                            colorMatrix.Matrix33 = (float)Convert.ToSingle(fileSystem.WatermarkPct);
                            var imageAttributes = new ImageAttributes();
                            imageAttributes.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
                            ObjGraphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
                            ObjGraphics.DrawImage(
                                        Watermark_Image,
                                        new Rectangle(w_myX, w_myY, w_Width, w_Height),
                                        0,
                                        0,
                                        Watermark_Image.Width,
                                        Watermark_Image.Height,
                                        GraphicsUnit.Pixel,
                                        imageAttributes);
                        }



                        //下方設定使JPG質量
                        EncoderParameters EPS = new EncoderParameters();                   
                        EncoderParameter EP = new EncoderParameter(Encoder.Quality, global.ImageCompressionQuality);
                        EPS.Param[0] = EP;
                        ImageCodecInfo[] codecs = ImageCodecInfo.GetImageEncoders();
                        ImageCodecInfo ICI = null;
                        foreach (ImageCodecInfo codec in codecs)
                        {
                            if (codec.MimeType == "image/" + picType)
                            {
                                ICI = codec;
                                break;
                            }
                        }
                        New_Image.Save(savePath, ICI, EPS);
                        New_Image.Dispose();
                        ObjGraphics.Dispose();

                    }
                    else
                    {
                        jpeg_image_upload.SaveAs(savePath);
                    }
                    Bm.Dispose();
                }
                else if (fileSystem.isAllowed(jpeg_image_upload.FileName))
                {
                    jpeg_image_upload.SaveAs(savePath);
                }
            }
            catch (Exception)
            {
                // If any kind of error occurs return a 500 Internal Server error
                Response.StatusCode = 500;
                Response.Write("An error occured");
                Response.End();
            }
            finally
            {
                Response.End();
            }
        }
        else
        {
            Response.Clear();
            Response.StatusCode = 404;
            Response.End();
        }

    }
}