using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using ZXing;
using ZXing.QrCode;
using System.Drawing.Imaging;
using System.IO;
using ZXing.Common;

namespace QR_GEN
{
  /// <summary>
  /// Utility per Code Generator online
  /// </summary>
  public class utils
  {
    /// <summary>
    /// Genera immagina barcode richeista secondo dimensioni e formato
    /// </summary>
    /// <param name="dataStr"></param>
    /// <param name="hSize">altezza</param>
    /// <param name="formato">formati 1D di ZXing</param>
    /// <param name="pureBarcode">indica se SOLO barcode</param>
    /// <returns></returns>
    public static ActionResult getImage(string dataStr, int hSize, BarcodeFormat formato, bool pureBarcode)
    {
      // se vuoto steamware...
      if (dataStr == null || dataStr == "")
      {
        dataStr = "www.steamware.net";
      }
      dataStr = dataStr.ToUpper();
      // url decode...
      dataStr = HttpUtility.UrlDecode(dataStr);
      // creo!
      EncodingOptions options = new EncodingOptions
      {
        Height = hSize,
        Margin = 0,
        PureBarcode = pureBarcode
      };
      BarcodeWriter writer = new BarcodeWriter();
      writer.Format = formato;
      writer.Options = options;
      // scrivo bitmap
      System.Drawing.Bitmap pixelData = writer.Write(dataStr);

      // Return Image
      MemoryStream ms = new MemoryStream();
      pixelData.Save(ms, ImageFormat.Png);
      ms.Position = 0;
      return new FileStreamResult(ms, "image/png");
    }
    /// <summary>
    /// Genera immagina barcode richeista secondo dimensioni e formato
    /// </summary>
    /// <param name="id"></param>
    /// <param name="hSize"></param>
    /// <param name="wSize"></param>
    /// <param name="formato"></param>
    /// <returns></returns>
    public static ActionResult getImage2D(ref string id, int hSize, int wSize, BarcodeFormat formato)
    {
      // se vuoto steamware...
      if (id == null || id == "")
      {
        id = "www.steamware.net";
      }
      id = id.ToUpper();
      // url decode...
      id = HttpUtility.UrlDecode(id);
      // creo!
      QrCodeEncodingOptions options = new QrCodeEncodingOptions
      {
        DisableECI = true,
        CharacterSet = "UTF-8",
        Width = wSize,
        Height = hSize,
        Margin = 0
      };
      BarcodeWriter writer = new BarcodeWriter();
      writer.Format = formato;
      writer.Options = options;
      // scrivo bitmap
      System.Drawing.Bitmap pixelData = writer.Write(id);

      // Return Image
      MemoryStream ms = new MemoryStream();
      pixelData.Save(ms, ImageFormat.Png);
      ms.Position = 0;
      return new FileStreamResult(ms, "image/png");
    }
  }
}