using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.IO.Ports;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace MacManagerForTemPatch
{

    public partial class Form1 : Form
    {

        private bool flag_start;
        private bool flag_end;
        private byte[] mSerial_Buff;
        private int mSerial_Buff_idx;

        static private List<Data> macList;
        private StringCollection savedMacList;
        private StringCollection runTimeData;

        public Form1()
        {
            InitializeComponent();
            runTimeData = new StringCollection();
            //comboBox_comport.DataSource = SerialPort.GetPortNames();

            mSerial_Buff = new byte[4096];
            mSerial_Buff_idx = 0;

            macList = new List<Data>();

            savedMacList = Properties.Settings.Default.savedmaclist;

            label_lastmac.Text = "";

            if (savedMacList != null)
            {
                if(savedMacList.Count > 0 )
                {
                    for(int i = 0; i < savedMacList.Count; i++)
                    {
                        String temp = savedMacList[i];
                        String[] array = temp.Split(',');

                        Console.WriteLine("data : " + temp);


                        ListViewItem lvi = new ListViewItem((i+1).ToString());
                        lvi.SubItems.Add(array[0]);
                        lvi.SubItems.Add(array[1]);
                        lvi.SubItems.Add(array[2]);

                        

                        Data data = new Data(array[0], array[1], array[2]);


                        updateList(data);

                    }
                    
                }
            }

            GetSerialPort();

        }

        private void GetSerialPort()
        {
            //   comboBox_comport.DataSource = SerialPort.GetPortNames();

            comboBox_comport.Items.Clear();

            try
            {
                foreach (string str in SerialPort.GetPortNames())
                {
                    comboBox_comport.Items.Add(str);
                }

            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }

        }
        protected override void WndProc(ref Message m)
        {
            UInt32 WM_DEVICECHANGE = 0x0219;
            UInt32 DBT_DEVTUP_VOLUME = 0x02;
            UInt32 DBT_DEVICEARRIVAL = 0x8000;
            UInt32 DBT_DEVICEREMOVECOMPLETE = 0x8004;

            if ((m.Msg == WM_DEVICECHANGE) && (m.WParam.ToInt32() == DBT_DEVICEARRIVAL))//디바이스 연결
            {
                //int m_Count = 0;
                int devType = Marshal.ReadInt32(m.LParam, 4);

                if (devType == DBT_DEVTUP_VOLUME)
                {
                    GetSerialPort();
                }
            }

            if ((m.Msg == WM_DEVICECHANGE) && (m.WParam.ToInt32() == DBT_DEVICEREMOVECOMPLETE))  //디바이스 연결 해제
            {
                int devType = Marshal.ReadInt32(m.LParam, 4);
                if (devType == DBT_DEVTUP_VOLUME)
                {
                    GetSerialPort();
                }
            }

            base.WndProc(ref m);
        }


        private void button_save_csv_Click(object sender, EventArgs e)
        {
            string fileName;
            SaveFileDialog saveFileDialog = new SaveFileDialog();
            saveFileDialog.Title = "저장 경로를 선택하세요";
            saveFileDialog.OverwritePrompt = true;
            saveFileDialog.Filter = "CSV 파일 (*.csv)|*.csv|모든 파일 (*.*)|*.*";
            saveFileDialog.FileName = "[" + macList.Count.ToString() + "]TemPatchMacAddress_" + DateTime.Now.ToString("yyyyMMdd_HHmmss") + ".csv";



            if (saveFileDialog.ShowDialog() == DialogResult.OK)
            {
                fileName = saveFileDialog.FileName;

                ListViewToCSV(listView_maclist, fileName, false);

                //public static void ListViewToCSV(ListView listView, string filePath, bool includeHidden)
            }
        }

        private void button_open_Click(object sender, EventArgs e)
        {

            if (!serialPort.IsOpen)  //시리얼포트가 열려 있지 않으면
            {

                serialPort.PortName = comboBox_comport.Text;
                serialPort.BaudRate = 115200;
                serialPort.DataBits = 8;
                serialPort.StopBits = StopBits.One;
                serialPort.Parity = Parity.None;
                serialPort.RtsEnable = false;
                serialPort.DataReceived += new SerialDataReceivedEventHandler(serialPort_DataReceived);

                try
                {
                    serialPort.Open();
                    //label_comport_status.Text = "Port Opened";
                }
                catch
                {
                    //MessageBox.Show("사용중인 시리얼 포트 입니다.");
                    MessageBox.Show("Already used in serial port.");
                }

            }
            else  //시리얼포트가 열려 있으면

            {
                //label_comport_status.Text = "Port already Opened..";
                serialPort.Close();
            }


            if (serialPort.IsOpen)
            {
                comboBox_comport.Enabled = false;  //COM포트설정 콤보박스 비활성화
                ((Button)(sender)).Text = "CLOSE";

            }
            else
            {
                comboBox_comport.Enabled = true;  //COM포트설정 콤보박스 비활성화
                ((Button)(sender)).Text = "OPEN";
            }
        }


        private void serialPort_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            try
            {
                this.Invoke(new EventHandler(SerialReceived));
            }
            catch
            {
                Console.WriteLine("error : " + e);
            }
        }

        private void updateList(Data data)
        {

            macList.Add(data);


            ListViewItem lvi = new ListViewItem((macList.Count).ToString());
            //lvi.SubItems.Add();
            lvi.SubItems.Add(data.MacAddr);
            lvi.SubItems.Add(data.Write_Date);
            lvi.SubItems.Add(data.Write_Time);

            listView_maclist.Items.Add(lvi);


            String tempbuf = data.MacAddr + ',' + data.Write_Date + ',' + data.Write_Time;

            //savedMacList.Add(tempbuf);

            runTimeData.Add(tempbuf);
            Properties.Settings.Default.savedmaclist = runTimeData;
            Properties.Settings.Default.Save();


            listView_maclist.EnsureVisible(macList.Count - 1);

            foreach (ListViewItem item in listView_maclist.Items)
            {
                item.BackColor = Color.Transparent;
            }
            listView_maclist.Items[macList.Count - 1].BackColor = Color.SkyBlue;
            label_lastmac.Text = macList.Count.ToString() + "번 " + data.MacAddr;
        }



        private void SerialReceived(object s, EventArgs e)  //여기에서 수신 데이타를 사용자의 용도에 따라 처리한다.
        {
            int i_recv_size = serialPort.BytesToRead;
            int data_len = 0;
            byte[] b_tmp_buf = new byte[i_recv_size];
            string recv_str = "";

            if (i_recv_size == 0)
                return;
            serialPort.Read(b_tmp_buf, 0, i_recv_size);
            recv_str = Encoding.Default.GetString(b_tmp_buf);


            Console.WriteLine(recv_str);

            for (int i = 0; i < i_recv_size; i++)
            {
                if (b_tmp_buf[i] == '#')
                {
                    flag_start = true;
                    continue;
                }

                if (flag_start == true)
                {
                    mSerial_Buff[mSerial_Buff_idx++] = b_tmp_buf[i];

                    if (mSerial_Buff_idx > 1)
                    {

                        if (b_tmp_buf[i] == '$')
                        {
                            flag_end = true;
                        }

                        if (flag_end == true)
                        {
                            byte[] temp = new byte[mSerial_Buff_idx-1];
                            Array.Copy(mSerial_Buff, temp, mSerial_Buff_idx-1);

                            // For Debugging Console
                            string mac = Encoding.Default.GetString(temp);

                            Console.WriteLine("mac : " + mac);
                            
                            String date = DateTime.Now.ToString("yyyy-MM-dd");
                            String time = DateTime.Now.ToString("HH:mm:ss");

                            Data data = new Data(mac, date, time);

                            mSerial_Buff_idx = 0;

                            flag_end = false;
                            flag_start = false;

                            updateList(data);

                            
                        }

                    }
                }
            }
        }


        public void ListViewToCSV(ListView listView, string filePath, bool includeHidden)
        {
            //make header string
            StringBuilder result = new StringBuilder();
            WriteCSVRow(result, listView.Columns.Count, i => includeHidden || listView.Columns[i].Width > 0, i => listView.Columns[i].Text);

            //export data rows
            foreach (ListViewItem listItem in listView.Items)
                WriteCSVRow(result, listView.Columns.Count, i => includeHidden || listView.Columns[i].Width > 0, i => listItem.SubItems[i].Text);

            File.WriteAllText(filePath, result.ToString());


            if (MessageBox.Show("저장이 완료되었습니다. 목록을 삭제할까요? ", "데이터 삭제", MessageBoxButtons.YesNo) == DialogResult.Yes)
            {
                macList.Clear();
                listView_maclist.Items.Clear();

                Properties.Settings.Default.savedmaclist.Clear();
                Properties.Settings.Default.Save();

                label_lastmac.Text = "";
            }
            else
            {
                // MessageBox.Show("아니요 클릭");
            }

        }

        private static void WriteCSVRow(StringBuilder result, int itemsCount, Func<int, bool> isColumnNeeded, Func<int, string> columnValue)
        {
            bool isFirstTime = true;
            for (int i = 0; i < itemsCount; i++)
            {
                if (!isColumnNeeded(i))
                    continue;

                if (!isFirstTime)
                    result.Append(",");
                isFirstTime = false;

                result.Append(String.Format("\"{0}\"", columnValue(i)));

                
            }
            result.AppendLine();
        }

        private void button_removeAll_Click(object sender, EventArgs e)
        {
            if(macList.Count > 0)
            {
                if (MessageBox.Show("목록을 삭제할까요? ", "데이터 삭제", MessageBoxButtons.YesNo) == DialogResult.Yes)
                {
                    macList.Clear();
                    listView_maclist.Items.Clear();

                    Properties.Settings.Default.savedmaclist.Clear();
                    Properties.Settings.Default.Save();
                    label_lastmac.Text = "";
                }
            }
            else
            {
                MessageBox.Show("삭제할 데이터가 없습니다.");
            }
            
        }

        private void button_add_test_Click(object sender, EventArgs e)
        {
            var chars = "ABCDE0123456789";
            var stringChars = new char[17];
            var random = new Random();

            for (int i = 0; i < stringChars.Length; i++)
            {
                if (i == 2 || i == 5 || i == 8 || i == 11 || i == 14)
                    stringChars[i] = ':';
                else
                    stringChars[i] = chars[random.Next(chars.Length)];
            }
            var temp_mac = new String(stringChars);


            String date = DateTime.Now.ToString("yyyy-MM-dd");
            String time = DateTime.Now.ToString("HH:mm:ss");

            Data data = new Data(temp_mac, date, time);
            updateList(data);

        }
    }
}