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;
using Neo.Afx.Services.Documents;
using Neo.Afx.Services.Workflows;
using DevExpress.Pdf;
using System.Drawing;
using Neo.LegitimateLicences.Data.Models;

namespace Neo.LegitimateLicences.Web.AfxServices
{
    /// <summary>
    /// Summary description for PdfInstanceDocumentsGenerator
    /// </summary>
    public class PdfInstanceDocumentsGenerator : IHttpHandler
    {
        public void ProcessRequest(HttpContext context)
        {
            if (context.Request.QueryString.Count == 0)
                return;

            var entityID = -1;
            var itemID = -1L;
            var optionalEntityID = -1;
            var optionalItemID = -1L;
            var database = new ReportDatabase();

            if (!Int32.TryParse(context.Request.QueryString["entityID"], out entityID))
                return;

            if (!Int64.TryParse(context.Request.QueryString["itemID"], out itemID))
                return;

            if (!Int32.TryParse(context.Request.QueryString["optionalEntityID"], out optionalEntityID)) { }
            if (!Int64.TryParse(context.Request.QueryString["optionalItemID"], out optionalItemID)) { }

            var db = new WorkflowsDatabase();
            var docDb = new DocumentsDatabase();
            var legitimateDb = new LegitimateDatabase();

            var instance = db.GetWorkflowInstanceView(entityID, itemID);
            var documents = db.GetWorkflowInstanceDocuments(instance.WorkflowInstanceID, UserProfile.Current.UserID);
            var documentTypes = legitimateDb.GetDocumentTypes();


            var optionalDocuments = docDb.GetDocuments(optionalEntityID, optionalItemID).ToList();
            if(optionalDocuments == null)
            {
                optionalDocuments = new List<Afx.Services.Documents.Entities.Document>();
            }

            using (var mergedStream = new MemoryStream())
            {
                using (PdfDocumentProcessor pdfDocumentProcessor = new PdfDocumentProcessor()) 
                {
                    pdfDocumentProcessor.CreateEmptyDocument();
                    foreach (var doc in documents.Where(a => a.DocumentID.HasValue))
                    {
                        var file = docDb.GetDocumentObject(doc.DocumentID.Value);
                
                        if (file.Extension.ToLower() ==".pdf")
                        { 
                            using (var fileStream = new MemoryStream(file.Content))
                            { 
                                var pageCountBeforeAdd = (pdfDocumentProcessor.Document != null) ? pdfDocumentProcessor.Document.Pages.Count() : 0;
                                                                                    
                                pdfDocumentProcessor.AppendDocument(fileStream);

                                #region Add bookmark
                                PdfDestination destination1 = pdfDocumentProcessor.CreateDestination(pageCountBeforeAdd + 1);

                                var bookMark = new PdfBookmark()
                                {
                                    Title = doc.DocumentDescription,
                                    Destination = destination1
                                };

                                pdfDocumentProcessor.Document.Bookmarks.Add(bookMark);     
                                #endregion
                            }
                        }
                        else
                        {
                            var pageCountBeforeAdd = (pdfDocumentProcessor.Document != null) ? pdfDocumentProcessor.Document.Pages.Count() : 0;
                            string message = "Unable to print document :" + Environment.NewLine + doc.DocumentDescription;                                                       

                            using (PdfGraphics graphics = pdfDocumentProcessor.CreateGraphics())
                            {
                                SolidBrush black = (SolidBrush)Brushes.Black;
                                using (Font font = new Font("Segoe UI", 9, FontStyle.Bold))
                                {
                                    //graphics.DrawString(message, font, black, 10, 10);
                                    DrawGraphics(graphics, message);
                                }

                                pdfDocumentProcessor.RenderNewPage(PdfPaperSize.Letter, graphics);

                            }

                            #region Add bookmark
                            PdfDestination destination1 = pdfDocumentProcessor.CreateDestination(pageCountBeforeAdd + 1);

                            var bookMark = new PdfBookmark()
                            {
                                Title = doc.DocumentDescription,
                                Destination = destination1
                            };

                            pdfDocumentProcessor.Document.Bookmarks.Add(bookMark);
                            #endregion


                        }
                    }

                    foreach (var doc in optionalDocuments.Where(a => a.DocumentID > 0))
                    {
                        var file = docDb.GetDocumentObject(doc.DocumentID);
                        var description = documentTypes.Where(a => a.DocumentTypeID == doc.DocumentTypeID).FirstOrDefault().Description;
                        if (file.Extension.ToLower() == ".pdf")
                        {
                            using (var fileStream = new MemoryStream(file.Content))
                            {
                                var pageCountBeforeAdd = (pdfDocumentProcessor.Document != null) ? pdfDocumentProcessor.Document.Pages.Count() : 0;

                                pdfDocumentProcessor.AppendDocument(fileStream);

                                #region Add bookmark
                                PdfDestination destination1 = pdfDocumentProcessor.CreateDestination(pageCountBeforeAdd + 1);

                                var bookMark = new PdfBookmark()
                                {
                                    Title = description,
                                    Destination = destination1
                                };

                                pdfDocumentProcessor.Document.Bookmarks.Add(bookMark);
                                #endregion
                            }
                        }
                        else
                        {
                            var pageCountBeforeAdd = (pdfDocumentProcessor.Document != null) ? pdfDocumentProcessor.Document.Pages.Count() : 0;
                            string message = "Unable to print document :" + Environment.NewLine + description;

                            using (PdfGraphics graphics = pdfDocumentProcessor.CreateGraphics())
                            {
                                SolidBrush black = (SolidBrush)Brushes.Black;
                                using (Font font = new Font("Segoe UI", 9, FontStyle.Bold))
                                {
                                    //graphics.DrawString(message, font, black, 10, 10);
                                    DrawGraphics(graphics, message);
                                }

                                pdfDocumentProcessor.RenderNewPage(PdfPaperSize.Letter, graphics);

                            }

                            #region Add bookmark
                            PdfDestination destination1 = pdfDocumentProcessor.CreateDestination(pageCountBeforeAdd + 1);

                            var bookMark = new PdfBookmark()
                            {
                                Title = description,
                                Destination = destination1
                            };

                            pdfDocumentProcessor.Document.Bookmarks.Add(bookMark);
                            #endregion


                        }
                    }

                    pdfDocumentProcessor.SaveDocument(mergedStream);                    
                }

                #region Push Data  
                var fileName = instance.ReferenceNumber + DateTime.Now.ToString("ddMMyyyyhhmmss") + ".pdf";
                               
                context.Response.ClearHeaders();
                context.Response.ClearContent();                
                context.Response.AddHeader("Content-Length", mergedStream.Length.ToString());
                context.Response.ContentType = "application/pdf";
                context.Response.Charset = "UTF-8";
                mergedStream.Position = 0;
                context.Response.BinaryWrite(mergedStream.ToArray());
                context.Response.Flush();
                context.Response.Clear();
                #endregion
            }
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }

        static void DrawGraphics(PdfGraphics graph, string message)
        {
            SolidBrush black = (SolidBrush)Brushes.Black;
            using (Font font = new Font("Times New Roman", 12, FontStyle.Bold))
            {
                graph.DrawString(message, font, black, new RectangleF(100, 100, 500, 900));
            }
        }
    }
}