namespace psd
{
    /// <summary>
    /// Summary description for img
    /// </summary>
    public class img : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            
            var Params = context.Request.Params;
            var notFoundPath = context.Server.MapPath("~/img/404.png");
            if (Params["psd"] == null)
            {
                this.writeImage(notFoundPath);
                return;
            }

            var psdPath = context.Server.MapPath("~/psd_files/" + Params["psd"]);
            
            var imgOutPath = this.generateImageOutPath(Params["psd"], Params["text"]);

            
            if (File.Exists(imgOutPath))
            {
                //context.Response.WriteFile(imgOutPath);
                //context.Response.StatusCode = 304;

                //context.Response.StatusCode = 304;
                context.Response.Cache.SetExpires(DateTime.Now.AddMinutes(5));
                context.Response.Cache.SetCacheability(HttpCacheability.Public);
                //context.Response.Cache.SetValidUntilExpires(false);

                this.writeImage(imgOutPath);
                return;
            }
            else if (File.Exists(psdPath))
            {
                this.generateImage(psdPath, imgOutPath, Params["text"]);
                //context.Response.WriteFile(imgOutPath);
                this.writeImage(imgOutPath);
                return;
            }
            else
            {
                this.writeImage(notFoundPath);
                return;
            }
        }

        public bool IsReusable
        {
            get
            {
                return true;
            }
        }

        public void writeImage(String path)
        {
            HttpContext.Current.Response.ContentType = "image/png";
            //HttpContext.Current.Response.AddHeader("content-disposition", "inline; filename=" + Path.GetFileName(path));
            //HttpContext.Current.Response.StatusCode = 304;
            // HttpContext.Current.Response.Cache.SetExpires(DateTime.Now.Add(new TimeSpan(24, 0, 0)));
            //HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.Public);
            //HttpContext.Current.Response.Cache.SetValidUntilExpires(false);

            HttpContext.Current.Response.WriteFile(path);
            HttpContext.Current.Response.Flush();
            HttpContext.Current.Response.Close();
        }

    }
}