using System;
using System.Configuration;
using System.Web;
using DevExpress.XtraPrinting;
using DevExpress.XtraReports.UI;
using System.Collections.Generic;
using Neo.Afx.Services.Reports;
using System.IO;
using System.Linq;
using Neo.Afx.Security;

namespace Neo.LegitimateLicences.Web.AfxServices
{
    public class ReportDownloader : IHttpHandler
    {
        public void ProcessRequest(HttpContext context)
        {
            if (context.Request.QueryString.Count == 0)
                return;

            var reportDefinitionID = -1L;
            var database = new ReportDatabase();

            if (!Int64.TryParse(context.Request.QueryString["reportDefinitionID"], out reportDefinitionID))
                return;
            
            var reportDefinition = database.GetReportDefinitionWithServer(reportDefinitionID);
            var assembly = reportDefinition.Server.Url;
            var typename = assembly + "." + reportDefinition.ReportFolder + "." + reportDefinition.ReportName;
            var temp = Type.GetType(typename + ", " + assembly);
            var report = (XtraReport)Activator.CreateInstance(Type.GetType(typename + ", " + assembly));
            var reportParameters = context.Request.QueryString.AllKeys.Where(qs => !qs.Contains("reportDefinitionID") && !qs.Contains("reportType")).Select(qs => new KeyValuePair<string, string>(qs, context.Request.QueryString[qs])).ToList();
            foreach (var p in report.Parameters)
            {
                if (p.Description.ToLower() == "userid")
                { 
                    p.Value =  UserProfile.Current.UserID;
                }
                else
                { 
                    var parameter = reportParameters.Where(a => a.Key.ToLower() == p.Name.ToLower()).FirstOrDefault();
                    if (parameter.Key != null)
                    {
                        p.Value = parameter.Value;
                    }   
                }
            }

            var fileName = (context.Request.QueryString["fileName"] != null) ? context.Request.QueryString["fileName"].ToString() : "";
            if (string.IsNullOrEmpty(fileName))
            { 
                fileName = reportDefinition.ReportName + DateTime.Now.ToString("ddMMyyyyhhmmss") + ".pdf";
            }

            MemoryStream localStream = new MemoryStream();
            report.ExportToPdf(localStream);

            #region Push Data            
            context.Response.ClearHeaders();
            context.Response.ClearContent();
            context.Response.AddHeader("Content-Disposition", " attachment; filename=" + fileName);
            context.Response.AddHeader("Content-Length", localStream.Length.ToString());
            context.Response.ContentType = "application/pdf";
            context.Response.Charset = "UTF-8";
            context.Response.BinaryWrite(localStream.ToArray());
            context.Response.Flush();
            context.Response.Clear();
            #endregion

        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}