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;


// include the libraries
using AForge.Video;
using AForge.Video.DirectShow;
using ZXing;

namespace HCI_Coursework_EVCHARGE
{
    public partial class QRReader : Form
    {
        // foxlearn.com/windows-forms/qr-code-scanner-using-camera-in-csharp-380.html


        FilterInfoCollection filterInfoCollection;
        VideoCaptureDevice videoCaptureDevice;

        public QRReader()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            // this will list the available cameras
            filterInfoCollection = new FilterInfoCollection(FilterCategory.VideoInputDevice);
            foreach (FilterInfo Device in filterInfoCollection)
                cboCamera.Items.Add(Device.Name);
            cboCamera.SelectedIndex = 0;

            // start the camera device
            videoCaptureDevice = new VideoCaptureDevice(filterInfoCollection[cboCamera.SelectedIndex].MonikerString);
            videoCaptureDevice.NewFrame += FinalFrame_NewFrame;
            videoCaptureDevice.Start();
            timer1.Start();
        }

        private void FinalFrame_NewFrame(object sender, NewFrameEventArgs eventArgs)
        {
            // show the video in the picturebox
            pictureBox1.Image = (Bitmap)eventArgs.Frame.Clone();
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            // close the camera device when the app is closed
            if (videoCaptureDevice.IsRunning == true)
                videoCaptureDevice.Stop();
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            // try and detect a barcode/qrcode in the image frame
            BarcodeReader Reader = new BarcodeReader();
            Result result = Reader.Decode((Bitmap)pictureBox1.Image);
            if (result != null && result.Text == "AB87654321")
            {
                BaySelection baySelection = new BaySelection(result.Text);
                baySelection.Show();
                baySelection.FormClosed += delegate
                {
                    baySelection = null;
                };
                Close();
            }
        }

        private void cancel_Click(object sender, EventArgs e)
        {
            Close();
        }
    }
}