using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Data;
using System.Drawing.Imaging;
using System.Drawing.Printing;
using System.Windows.Forms;
using Microsoft.Reporting.WinForms;
using System.Configuration;
using SteamWare;

namespace XPS_data
{
  /// <summary>
  /// Summary description for reportPrinter
  /// </summary>
  public class reportPrinter
  {

    #region area codice da non modificare


    private int m_currentPageIndex;
    private IList<Stream> m_streams;
    /// <summary>
    /// ciclo da fornire al renderizzatore dei report, per salvare 1 immagine da ogni pagina del report
    /// </summary>
    /// <param name="name"></param>
    /// <param name="fileNameExtension"></param>
    /// <param name="encoding"></param>
    /// <param name="mimeType"></param>
    /// <param name="willSeek"></param>
    /// <returns></returns>
    private Stream CreateStream(string name, string fileNameExtension, Encoding encoding, string mimeType, bool willSeek)
    {
      string filePath = System.Web.HttpContext.Current.Server.MapPath(@"~\tmp\" + name + "." + fileNameExtension);
      if (memLayer.ML.CRI("_logLevel") > 6) logger.lg.scriviLog(string.Format("Creazione file EMF in {0}", filePath), tipoLog.INFO);
      Stream stream = new FileStream(filePath, FileMode.Create);
      m_streams.Add(stream);
      return stream;
    }
    /// <summary>
    /// Handler per PrintPageEvents
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="ev"></param>
    private void PrintPage(object sender, PrintPageEventArgs ev)
    {
      Metafile pageImage = new Metafile(m_streams[m_currentPageIndex]);
      ev.Graphics.DrawImage(pageImage, ev.PageBounds);
      m_currentPageIndex++;
      ev.HasMorePages = (m_currentPageIndex < m_streams.Count);
    }
    /// <summary>
    /// funzione di stampa...
    /// </summary>
    private void Print(string printerName)
    {
      //const string printerName = "Microsoft Office Document Image Writer";
      //const string printerName = "Brother HL-2170W series";
      logger.lg.scriviLog(string.Format("inizio print su {0}", printerName), tipoLog.INFO);
      if (m_streams == null || m_streams.Count == 0)
        return;
      PrintDocument printDoc = new PrintDocument();
      printDoc.PrinterSettings.PrinterName = printerName;
      if (!printDoc.PrinterSettings.IsValid)
      {
        string msg = String.Format("Can't find printer \"{0}\".", printerName);
        MessageBox.Show(msg, "Print Error");
        logger.lg.scriviLog("ERRORE IN check printDoc.PrinterSettings.IsValid", tipoLog.ERROR);
        return;
      }
      printDoc.PrintPage += new PrintPageEventHandler(PrintPage);
      printDoc.Print();
      logger.lg.scriviLog("Fine print", tipoLog.INFO);
    }
    /// <summary>
    /// Export del report come EMF (Enhanced Metafile) file.
    /// </summary>
    /// <param name="report"></param>
    private void Export(LocalReport report, string deviceInfo)
    {
      Warning[] warnings;
      m_streams = new List<Stream>();
      //2017.09.15 cerco di intercettare eccezione...
      try
      {
        report.Render("Image", deviceInfo, CreateStream, out warnings);
      }
      catch(Exception exc)
      {
        logger.lg.scriviLog(string.Format("ERRORE in fase di rendering del report: {0}{1}", Environment.NewLine, exc));
      }
      try
      {
        foreach (Stream stream in m_streams) stream.Position = 0;
      }
      catch(Exception exc)
      {
        logger.lg.scriviLog(string.Format("ERRORE in fase di ACCODAMENTO STREAM per report: {0}{1}", Environment.NewLine, exc));
      }
    }
    /// <summary>
    /// dispone l'applicazione e rilascia le risorse
    /// </summary>
    public void Dispose()
    {
      if (m_streams != null)
      {
        foreach (Stream stream in m_streams)
          stream.Close();
        m_streams = null;
      }
    }

    #endregion

    #region area codice da modificare

    /// <summary>
    /// carica i dati richiesti dal report dalla StoredProcedure (filtrando quindi...)
    /// </summary>
    /// <param name="idxObj"></param>
    /// <returns></returns>
    private DataTable caricaDati(reportRichiesto tipoReport, string idxObj)
    {
      DataTable tab = new DataTable();
      if (memLayer.ML.CRI("_logLevel") > 6) logger.lg.scriviLog(string.Format("Richiesto tabella x report {0}", tipoReport), tipoLog.INFO);
      switch (tipoReport)
      {
        case reportRichiesto.Barcode:
          tab = (DataTable)XPS.obj.taDdt.GetData(idxObj);
          break;
        case reportRichiesto.SchedaIdentificazione:
          tab = (DataTable)XPS.obj.taSchedaIdent.GetData(idxObj);
          break;
        default:
          break;
      }
      if (memLayer.ML.CRI("_logLevel") > 6) logger.lg.scriviLog(string.Format("Effettuata lettura tabella x report {0}", tipoReport), tipoLog.INFO);
      return tab;
    }
    /// <summary>
    /// Crea un report locale da file rdlc, carica i dati, esporta report come EMF file e quindi lo invia alla stampante
    /// </summary>
    /// <param name="idxObjRich"></param>
    /// <param name="printerName"></param>
    public void printReport(reportRichiesto tipoReport, string printerName, string parametro)
    {
      if (parametro != "")
      {
        LocalReport report = new LocalReport();
        string outForm = "";
        string pagWidth = "";
        string pagHeigth = "";
        string margin = "";
        // carico i dati del report da web.config
        outForm = "EMF";
        pagWidth = memLayer.ML.confReadString(string.Format("PageWidth{0}", tipoReport));
        pagHeigth = memLayer.ML.confReadString(string.Format("PageHeight{0}", tipoReport));
        margin = memLayer.ML.confReadString(string.Format("Margin{0}", tipoReport));
        // compongo parametri stampa
        devInfoParam deviceInfoPar = new devInfoParam(outForm, pagHeigth, pagWidth, margin, margin, margin, margin);
        // path rdlc report
        report.ReportPath = "";// string.Format(@".\Reports\{0}", memLayer.ML.confReadString(string.Format("rdlc{0}", tipoReport)));
        switch (tipoReport)
        {
          case reportRichiesto.Barcode:
            //report.ReportPath = @".\Reports\LabelEqua.rdlc";
            report.ReportPath = string.Format(@".\{0}\LabelEqua.rdlc", memLayer.ML.CRS("ReportBasePath"));
            report.DataSources.Add(new ReportDataSource("Equa", caricaDati(tipoReport, parametro))); // OCCHIO!!! va messa sorgente dati CORRETTA
            break;
          case reportRichiesto.SchedaIdentificazione:
            //report.ReportPath = @".\Reports\ReportSchedaIdentificazione.rdlc";
            report.ReportPath = string.Format(@".\{0}\ReportSchedaIdentificazione.rdlc", memLayer.ML.CRS("ReportBasePath"));
            report.DataSources.Add(new ReportDataSource("Equa", caricaDati(tipoReport, parametro)));
            break;
          default:
            break;
        }
        // setting parametro...
        int numFields = 1;
        ReportParameter[] rParam = new ReportParameter[numFields];
        rParam[0] = new ReportParameter("IdxObj", parametro);
        report.SetParameters(rParam);
        try
        {
          // export in EMF
          Export(report, deviceInfoPar.xmlParam);
          if (memLayer.ML.CRI("_logLevel") > 6) logger.lg.scriviLog("Fine export EMF", tipoLog.INFO);
          m_currentPageIndex = 0;
          // stampo
          Print(printerName);
          if (memLayer.ML.CRI("_logLevel") > 6) logger.lg.scriviLog("Fine Stampa", tipoLog.INFO);
          // do dispose?
          Dispose();
        }
        catch(Exception exc)
        {
          logger.lg.scriviLog(string.Format("ERRORE in fase di EXPORT del report in formato EMF: {0}{1}", Environment.NewLine, exc));
        }
      }
      else
      {
        logger.lg.scriviLog("ERRORE! parametro idxObj vuoto!!!", tipoLog.ERROR);
      }
    }
    /// <summary>
    /// oggetto protected
    /// </summary>
    /// <param name="args"></param>
    protected reportPrinter()
    {
      //
    }
    /// <summary>
    /// singleton pubblico
    /// </summary>
    public static reportPrinter obj = new reportPrinter();

    #endregion
  }
  /// <summary>
  /// tipologia di report ammessi alla stampa...
  /// </summary>
  public enum reportRichiesto
  {
    Barcode,
    SchedaIdentificazione
  }
}