using AForge.Video;
using AForge.Video.DirectShow;
using DatenDB;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using ZXing;


namespace Deckungsbeitrag
{
  public partial class FormKamera : Form
  {
    public Kunde kunde;
    //QR-Code Scan mit integrierter Kamera
    private VideoCaptureDevice videoSource;
    private FilterInfoCollection videoDevices;
    private BarcodeReader barcodeReader;
    private bool isScanning = false;

    public FormKamera()
    {
      InitializeComponent();
    }

    public FormKamera(FilterInfoCollection videoDevices) : this()
    {
      this.videoDevices = videoDevices;
    }

    private void FormKamera_Load(object sender, EventArgs e)
    {

      barcodeReader = new BarcodeReader();

      videoSource = new VideoCaptureDevice(videoDevices[0].MonikerString);
      videoSource.NewFrame += VideoSource_NewFrame;
      videoSource.Start();
      isScanning = true;
    }

    /// <summary>
    /// PictureBox mit Live Bild der Kamera laden und anzeigen.
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="eventArgs"></param>
    private void VideoSource_NewFrame(object sender, NewFrameEventArgs eventArgs)
    {
      using (Bitmap unflippedbitmap = (Bitmap)eventArgs.Frame.Clone())
      {
        Bitmap bitmap = FlipHorizontal(unflippedbitmap);
        pictureBoxKamera.Image?.Dispose();
        pictureBoxKamera.Image = (Bitmap)bitmap.Clone();

        var result = barcodeReader.Decode(bitmap);
        if (result != null && result.BarcodeFormat == BarcodeFormat.QR_CODE)
        {
          this.Invoke(new Action(() => {
            this.kunde = Kunde.GetKunde(result.Text, null, null);  // Direkt in TextBox schreiben
            pictureBoxKamera.Image?.Dispose();

            StopScanning();

            System.Media.SystemSounds.Asterisk.Play();
            this.DialogResult = DialogResult.OK;
            this.Close();
          }));
        }

      }

    }

    /// <summary>
    /// Die Bitmap wir Horizontal geflippt damit die Orientierung beim QR-Scann besser ist.
    /// </summary>
    /// <param name="source"></param>
    /// <returns></returns>
    private Bitmap FlipHorizontal(Bitmap source)
    {
      Bitmap flipped = (Bitmap)source.Clone();
      flipped.RotateFlip(RotateFlipType.RotateNoneFlipX);  // ✅ Funktioniert!
      return flipped;
    }

    /// <summary>
    /// Scannen wird hier gestoppt.
    /// </summary>
    private void StopScanning()
    {
      if (videoSource != null)
      {
        videoSource.SignalToStop();
        videoSource = null;
        isScanning = false;
      }
      
    }

    /// <summary>
    /// Wenn QR-Code scannen nicht möglich ist, kann händische Eingabe gewählt werden.
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void buttonHand_Click(object sender, EventArgs e)
    {
      StopScanning();
      this.DialogResult = DialogResult.No;
      this.Close();
    }

    /// <summary>
    /// Scanning beenden falls Form geschlossen wird.
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void FormKamera_FormClosing(object sender, FormClosingEventArgs e)
    {
      if (isScanning) { StopScanning(); this.DialogResult = DialogResult.Cancel; }
    }
  }
}