using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.IO.Ports;
using System.Linq;
using System.Runtime.CompilerServices;
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;

namespace Plugin.TestResult_WPF
{
    public class BarcodeEventArg
    {
        public string name { get; private set; }
        public string positionCode { get; private set; }
        public string snrCode { get; private set; }

        public BarcodeEventArg(string name, string positionCode, string snrCode)
        {
            this.name = name;
            this.positionCode = positionCode;
            this.snrCode = snrCode;
        }
    }

    /// <summary>
    /// Scanner.xaml 的交互逻辑
    /// </summary>
    public partial class Scanner : Window, INotifyPropertyChanged
    {
        #region ...
        public event PropertyChangedEventHandler PropertyChanged;

        public virtual void RaisePropertyChanged(string name)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));
        }

        public void RaiseAndSetIfchanged<T>(ref T old, T @new, [CallerMemberName] string propertyName = null)
        {
            old = @new;
            if (propertyName != null) RaisePropertyChanged(propertyName);
        }
        #endregion

        private string _title;

        public string title
        {
            get { return _title; }
            set => RaiseAndSetIfchanged(ref _title, value);
        }

        public event EventHandler<BarcodeEventArg> FinishBarcode;

        private DataTable dataTable;
        SerialPort serialPort;
        public Scanner(string title)
        {
            this.title = title;
            this.DataContext = this;
            InitializeComponent();
            InitScanner();
        }

        /// <summary>
        /// 设置扫码枪
        /// </summary>
        private void InitScanner()
        {
            string comStr = "";
            if (serialPort != null) return;
            if (this.title == "一区扫码")
            {
                comStr = "COM1";
            }
            else
            {
                comStr = "COM2";
            }

            // 配置串口
            serialPort = new SerialPort
            {
                PortName = comStr,
                BaudRate = 115200,
                Parity = Parity.None,
                DataBits = 8,
                StopBits = StopBits.One,
                Handshake = Handshake.None,
                DtrEnable = true,
                RtsEnable = true
                //ReadTimeout = 500,
                //WriteTimeout = 500,
                //ReciveBufferSize=4096
            };

            try
            {
                // 打开串口
                serialPort.Open();
                // 注册接收数据事件
                serialPort.DataReceived += SerialPort_DataReceived;
            }
            catch (Exception ex)
            {
                MessageBox.Show($"初始化扫码枪失败！{ex.StackTrace}");
            }
        }

        private void SerialPort_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            try
            {
                SerialPort sp = (SerialPort)sender;
                string barcode = ReadDataFrom(sp);

                //string barcode = 
                Dispatcher.Invoke(() =>
                {
                    if (snrText.IsFocused)
                    {
                        snrText.Text = barcode;
                        Con_Click(null, null);
                    }
                    else
                    {
                        positionText.Text = barcode;
                        //positionText.Focus();
                        //snrText.Text = "";
                        snrText.Focus();
                    }
                });
            }
            catch (Exception ex)
            {
                MessageBox.Show($"获取扫码枪数据失败！{ex.StackTrace}");
            }
        }

        private void Con_Click(object sender, RoutedEventArgs e)
        {
            Dispatcher.Invoke(() =>
            {
                string position = positionText.Text, snr = snrText.Text;
                if (string.IsNullOrEmpty(position) || string.IsNullOrEmpty(snr))
                {
                    MessageBox.Show("请输入储位条码和产品条码");
                    return;
                }
                try
                {
                    FinishBarcode.Invoke(this, new BarcodeEventArg(title, position, snr));
                    //positionText.Text = "";
                    //snrText.Text = "";
                    positionText.Focus();
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
            });
        }

        private void Ok_Click(object sender, RoutedEventArgs e)
        {
            string position = positionText.Text, snr = snrText.Text;
            if (string.IsNullOrEmpty(position) || string.IsNullOrEmpty(snr))
            {
                MessageBox.Show("请输入储位条码和产品条码");
                return;
            }
            try
            {
                FinishBarcode.Invoke(this, new BarcodeEventArg(title, position, snr));
                this.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        private string ReadDataFrom(SerialPort sp)
        {
            string barcode = "";
            while (sp.BytesToRead > 0)
            {
                byte[] buffer = new byte[sp.BytesToRead];
                sp.Read(buffer, 0, buffer.Length);
                barcode += System.Text.Encoding.UTF8.GetString(buffer);
                System.Threading.Thread.Sleep(50);
            }
            return barcode;
        }

        private void Window_Closing(object sender, CancelEventArgs e)
        {
            try
            {
                serialPort.Close();
            }
            catch (Exception ex)
            {
            }
        }
    }
}