using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Web.Mvc;
using FastReport;
using Kreta.BusinessLogic.Classes;
using Kreta.Core;
using Kreta.Web.Controllers;

namespace Kreta.Web.Areas.Tanulo.Helper
{
    public static class BelepesiAdatokPdfLogic
    {
        public static string GetFileLetoltesUrl(DataSet belepesDataSet, string frxNev, string fileName)
        {
            var stream = PdfNyomtatas(belepesDataSet, frxNev, pdfNeve: fileName);

            var guid = Cache.Add(stream);

            var fileFullName = $"{fileName}.pdf";

            var url = new UrlHelper(System.Web.HttpContext.Current.Request.RequestContext);
            return url.Action(nameof(CacheController.DownloadFile), nameof(CacheController).Replace("Controller", ""), new { guid, fileName = fileFullName, contentType = Core.Constants.ContentTypes.Pdf, area = "" });
        }

        /// Nyomtatványokhoz Pdf fájl generálás
        private static MemoryStream PdfNyomtatas(DataSet ds, string frxNeve, Dictionary<string, object> parameterek = null, string pdfNeve = "Alap")
        {
            FastReport.Utils.Config.WebMode = true;

            var report = new Report();
            report.Load(System.Web.Hosting.HostingEnvironment.MapPath((ApplicationData.NyomtatasiSablonokKonyvtar + "/" + frxNeve + ".frx")));

            foreach (DataTable dt in ds.Tables)
            {
                report.RegisterData(dt, dt.TableName);
            }

            if (parameterek != null)
            {
                foreach (var parameter in parameterek)
                {
                    report.SetParameterValue(parameter.Key, parameter.Value);
                }
            }

            if (report.Report.Prepare())
            {
                FastReport.Export.Pdf.PDFExport pdfExport = new FastReport.Export.Pdf.PDFExport
                {
                    ShowProgress = false,
                    Subject = "Subject",
                    Title = pdfNeve,
                    Compressed = true,
                    AllowPrint = true,
                    EmbeddingFonts = true
                };

                var stream = new MemoryStream();
                report.Report.Export(pdfExport, stream);
                report.Dispose();
                pdfExport.Dispose();
                stream.Position = 0;

                return stream;
            }
            return null;
        }
    }
}