using System.Drawing.Imaging;
using System.IO;
using System.Web;
using System.Web.Mvc;
using ZXing;
using ZXing.QrCode;

namespace QR_GEN.Controllers
{
  public class HomeController : Controller
  {
    /// <summary>
    /// Struct x richiesta serializzata/deserializzata
    /// </summary>
    public struct qrRequest
    {
      public string valore;
    }

    public ActionResult Index()
    {
      return View();
    }

    public RedirectResult steamware()
    {
      return Redirect("https://www.steamware.net");
    }
    /// <summary>
    /// Restituisce un QR code dato valore
    /// </summary>
    /// <param name="id"></param>
    /// <returns></returns>
    public ActionResult QR(string id)
    {
      // se vuoto stea,ware...
      if (id == null || id == "")
      {
        id = "www.steamware.net";
      }
#if false
      // se arriva modo json --> deserializzo
      if (id.IndexOf("{") >= 0)
      {
        var richiesta = JsonConvert.DeserializeObject<qrRequest>(id);
        id = richiesta.valore;
      } 
#endif
      // url decode...
      id = HttpUtility.UrlDecode(id);
      // creo!
      QrCodeEncodingOptions options = new QrCodeEncodingOptions
      {
        DisableECI = true,
        CharacterSet = "UTF-8",
        Width = 600,
        Height = 600,
        Margin = 0
      };
      var writer = new BarcodeWriter();
      writer.Format = BarcodeFormat.QR_CODE;
      writer.Options = options;
      // scrivo bitmap
      var pixelData = writer.Write(id);

      // Return Image
      MemoryStream ms = new MemoryStream();
      pixelData.Save(ms, ImageFormat.Png);
      ms.Position = 0;
      return new FileStreamResult(ms, "image/png");
    }
    /// <summary>
    /// Restituisce un QR code dato valore
    /// </summary>                                      
    /// <param name="id">id x impostare SITO x jumper</param>
    /// <param name="val">valore delle opzioni da embeddare</param>
    /// <returns></returns>
    public ActionResult QR_site(string id, string val)
    {
      string cmdArg = "";
      // se vuoto stea,ware...
      if (id == null || id == "")
      {
        cmdArg = "www.steamware.net";
      }
#if false
      // se arriva modo json --> deserializzo
      if (id.IndexOf("{") >= 0)
      {
        var richiesta = JsonConvert.DeserializeObject<qrRequest>(id);
        id = richiesta.valore;
      } 
#endif
#if false
      // url decode...
      id = HttpUtility.UrlDecode(id); 
#endif

      // valutare se usare file web.config, file .ini, file conf generico...

      string tgtUrl = "";
      // in base a richiesta compongo stringa ...
      switch (id)
      {
        case "CTRACK_ELET_SCAL":
          tgtUrl = @"ctrack.steamware.net/elet-scal/jumper?USER_NAME=info@elettronicascalvina.it&UserAuthkey=asdfbqhewrqg7802345bhasdfg78&CodOpr=";
          break;
        case "CTRACK_ELET_SCAL_UFF":
          tgtUrl = @"http://192.168.1.117/CTRACK/jumper?USER_NAME=info@elettronicascalvina.it&UserAuthkey=asdfbqhewrqg7802345bhasdfg78&CodOpr=";
          break;
        case "CTRACK_COLCOM":
          tgtUrl = @"http://192.168.0.113/MP/CTRACK/jumper?USER_NAME=opr_mon&UserAuthkey=AK_sdurb4930r2d&CodOpr=";
          break;
        default:
          break;
      }
      cmdArg = string.Format("{0}{1}", tgtUrl, val);
      // creo!
      QrCodeEncodingOptions options = new QrCodeEncodingOptions
      {
        DisableECI = true,
        CharacterSet = "UTF-8",
        Width = 600,
        Height = 600,
        Margin = 0
      };
      var writer = new BarcodeWriter();
      writer.Format = BarcodeFormat.QR_CODE;
      writer.Options = options;
      // scrivo bitmap
      var pixelData = writer.Write(cmdArg);

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