using CoreScanner;
using SafeBagDE70.Model;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using System.Windows.Threading;
using System.Xml;

namespace SafeBagDE70
{
    /// <summary>
    /// Interaction logic for QRCodeWindow.xaml
    /// </summary>
    public partial class QRCodeZebraWindow : HandyControl.Controls.Window
    {
      
        public string QRCodeContent = null;
        public CCoreScannerClass cCoreScannerClass;
        public QRCodeZebraWindow()
        {
            InitializeComponent();
            Init();
        }
        public void Init()
        {
            try
            {
                // Instantiate CoreScanner Class
                cCoreScannerClass = new CCoreScannerClass();

                // Call Open API
                short[] scannerTypes = new short[1];    // Scanner Types you are interested in
                scannerTypes[0] = 1;                    // 1 for all scanner types
                short numberOfScannerTypes = 1;         // Size of the scannerTypes array 
                int status;                             // Extended API return code

                cCoreScannerClass.Open(0, scannerTypes, numberOfScannerTypes, out status);

                // Subscribe for barcode events in cCoreScannerClass
                cCoreScannerClass.BarcodeEvent += new _ICoreScannerEvents_BarcodeEventEventHandler(OnBarcodeEvent);

                // Let's subscribe for events
                int opcode = 1001;  // Method for Subscribe events 
                string outXML;      // XML Output
                string inXML = "<inArgs>" +
                                    "<cmdArgs>" +
                                        "<arg-int>1</arg-int>" + // Number of events you want to subscribe
                                        "<arg-int>1</arg-int>" + // Comma separated event IDs
                                    "</cmdArgs>" +
                                "</inArgs>";

                cCoreScannerClass.ExecCommand(opcode, ref inXML, out outXML, out status);
            }
            catch (Exception exp)
            {
                Console.WriteLine("Something wrong please check... " + exp.Message);
            }
        }
        private void OnBarcodeEvent(short eventType, ref string pscanData)
        {
            string xmlString = pscanData;
            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.LoadXml(xmlString);

            XmlNode rawDataNode = xmlDoc.SelectSingleNode("//datalabel");
            string rawDataHex = rawDataNode.InnerText.Trim();

            QRCodeContent = HexStringToString(rawDataHex);
            this.Dispatcher.Invoke(() =>
            {
                cCoreScannerClass.BarcodeEvent -= new _ICoreScannerEvents_BarcodeEventEventHandler(OnBarcodeEvent);
                DialogResult = true;
                this.Close();
            });
        }

        static string HexStringToString(string hexString)
        {
            string[] hexValues = hexString.Split(new[] { " " }, StringSplitOptions.RemoveEmptyEntries);
            byte[] bytes = new byte[hexValues.Length];

            for (int i = 0; i < hexValues.Length; i++)
            {
                bytes[i] = Convert.ToByte(hexValues[i], 16);
            }
            return Encoding.ASCII.GetString(bytes);
        }

    }
}