using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
using static System.Windows.Forms.VisualStyles.VisualStyleElement;
using ComboBox = System.Windows.Forms.ComboBox;
using TextBox = System.Windows.Forms.TextBox;

namespace Card_Dispenser_Service
{
    public partial class Form1 : Form
    {
        /*********************************************************************************************************************/
        private readonly Service1 _service;
        private readonly CardManager _manager = new CardManager();
        private System.Windows.Forms.Timer _logRefreshTimer;

        public Form1(Service1 service)
        {
            InitializeComponent();
            comboBox6.Items.AddRange(new object[] { "Read", "Dispense", "Recycle", "Return" }); //TODO read from K720
            comboBox6.SelectedIndex = 0;
            _service = service;
            this.FormClosing += Form1_FormClosing;
            // Initialize and start the log refresh timer (5000ms = 5 seconds)
            _logRefreshTimer = new System.Windows.Forms.Timer();
            _logRefreshTimer.Interval = 5000;
            _logRefreshTimer.Tick += LogRefreshTimer_Tick;
            _logRefreshTimer.Start();

            // Trigger an immediate initial load so you don't wait 5 seconds when the form opens
            LogRefreshTimer_Tick(this, EventArgs.Empty);
        }

        private void LogRefreshTimer_Tick(object sender, EventArgs e)
        {
            // Make sure your RichTextBox/TextBox is named correctly here (e.g., rtbLogs or txtLogs)
            string currentLogs = Utils.GetLogContents();

            if (rtbLogs.Text != currentLogs)
            {
                rtbLogs.Text = currentLogs;

                // Auto-scroll to the bottom so you always see the latest logs
                rtbLogs.SelectionStart = rtbLogs.Text.Length;
                rtbLogs.ScrollToCaret();
            }
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (_service != null)
            {
                _service.Stop(); // Safely triggers OnStop() and shuts down your background thread
            }
            if (_logRefreshTimer != null)
            {
                _logRefreshTimer.Stop();
                _logRefreshTimer.Dispose();
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void disconnect_Click(object sender, EventArgs e)
        {
            if (K720.Instance.Disconnect())
            {
                button2.Enabled = false;
                button1.Enabled = true;
                textBox1.Text = "Connection Terminated";
            }
        }

        private void connect_Click(object sender, EventArgs e)
        {
            try
            {
                var fakePayload = new CardTaskResponse { Command = "Connect", Serial = comboBox1.Text, BaudRate = int.Parse(comboBox2.Text) };
                dynamic result = _manager.ExecuteHardwareCommand(fakePayload);
                bool isConected = result.isConnected;
                if (isConected)
                {
                    button1.Enabled = false;
                    button2.Enabled = true;
                    textBox1.Text = "Connection Success";
                }
            }
            catch (Exception ex)
            {
                Utils.LogToFile(ex.Message, "connect_Click");
            }

        }

        private void button3_Click(object sender, EventArgs e)
        {

            int nRet;
            //byte[] cmd = new byte[10];
            //cmd[0] = 0x46;
            //cmd[1] = 0x43;
            //cmd[2] = 0x37;
#if true
            //nRet = K720_SendCmd(ComHandle, MacAddr, cmd, 3, RecordInfo);
            nRet = K720.K720_MoveCard(0x30);
            if (nRet == 0)
            {
                textBox1.Text = "Move card to read position success";
            }
            else
                textBox1.Text = "Move card to read position failed";
#else
            byte[] DeviceStatus=new byte[4];
            byte[] TransportStatus=new byte[4];
            byte[] CardBoxStatus=new byte[4];
            byte[] RetainBoxStatus=new byte[4];
            nRet = K720_CheckCardPosition(DeviceStatus, TransportStatus, CardBoxStatus, RetainBoxStatus);
            if (nRet == 0)
            {
                String str = "", strText = "";
                switch (DeviceStatus[0])
                {
                    case 0x30:
                        str="machine status: value = 0x30 idle";
                        break;
                    case 0x31:
                        str="machine status: value = 0x31 fault";
                        break;
                    case 0x32:
                        str="machine status: value = 0x32 ready card failed";
                        break;
                    case 0x33:
                        str="machine status: value = 0x33 sending card";
                        break;
                    case 0x34:
                        str="machine status: value = 0x34 retaining card";
                        break;
                    case 0x35:
                        str="machine status: value = 0x35 send card failed";
                        break;
                    case 0x36:
                        str = "machine status: value = 0x36 retain card failed";
                        break;
                    default:
                        str = "machine status: value = 0x" + DeviceStatus[0].ToString("X2") + " undefine error";
                        break;
                }
                strText += str;
                strText += "\r\n";
                switch (TransportStatus[0])
                {
                    case 0x30:
                        str = "channel status: value = 0x30 double card";
                        break;
                    case 0x31:
                        str = "channel status: value = 0x31 jam";
                        break;
                    case 0x32:
                        str = "channel status: value = 0x32 read position have card";
                        break;
                    case 0x33:
                        str = "channel status: value = 0x33 have no card";
                        break;
                    case 0x34:
                        str = "channel status: value = 0x34 front have card";
                        break;
                    default:
                        str = "channel status: value = 0x" + TransportStatus[0].ToString("X2") + " undefine error";
                        break;
                }
                strText += str;
                strText += "\r\n";
                switch (CardBoxStatus[0])
                {
                    case 0x30:
                        str = "card box status: value = 0x30 empty";
                        break;
                    case 0x31:
                        str = "card box status: value = 0x31 less";
                        break;
                    case 0x32:
                        str = "card box status: value = 0x32 more";
                        break;
                    case 0x33:
                        str = "card box status: value = 0x33 not full";
                        break;
                    case 0x34:
                        str = "card box status: value = 0x34 full";
                        break;
                    default:
                        str = "card box status: value = 0x" + CardBoxStatus[0].ToString("X2") + " undefine error";
                        break;
                }
                MessageBox.Show(str);
                strText += str;
                strText += "\r\n";
                switch (RetainBoxStatus[0])
                {
                    case 0x30:
                        str = "retain box status: value = 0x30 not full";
                        break;
                    case 0x31:
                        str = "retain box status: value = 0x31 full";
                        break;
                    default:
                        str = "retain box status: value = 0x" + RetainBoxStatus[0].ToString("X2") + " undefine error";
                        break;
                }
                strText += str;
                strText += "\r\n";


                //str += "设备状态：0x" + DeviceStatus[0].ToString("X2") + "，通道状态：0x" + TransportStatus[0].ToString("X2") + "，卡箱状态：0x" + CardBoxStatus[0].ToString("X2") + "，回收箱状态：0x" + RetainBoxStatus[0].ToString("X2");
                MessageBox.Show(strText);
                textBox1.Text = "check success";
            }
            else
                textBox1.Text = "check failed";
#endif
        }

        private void button4_Click(object sender, EventArgs e)
        {
            bool nRet;
            //byte[] cmd = new byte[10];
            //cmd[0] = 0x46;
            //cmd[1] = 0x43;
            //cmd[2] = 0x34;

            //nRet = K720_SendCmd(ComHandle, MacAddr, cmd, 3, RecordInfo);
            nRet = K720.Instance.MoveCardToNonClipPosition();
            if (!nRet)
            {
                textBox1.Text = "move card to non-clip position success";
            }
            else
                textBox1.Text = "move card to non-clip position failed";
        }

        private void button5_Click(object sender, EventArgs e)
        {
            K720.Instance.RecycleCard();

        }

        private void button6_Click(object sender, EventArgs e)
        {
            //int nRet;
            //byte[] cmd = new byte[10];
            //cmd[0] = 0x52;
            //cmd[1] = 0x53;

            //nRet = K720_SendCmd(ComHandle, MacAddr, cmd, 2, RecordInfo);
            //if (nRet == 0)
            //{
            //    textBox1.Text = "Reset Success";
            //}
            //else
            //    textBox1.Text = "Reset Failed";
            int nRet = 0;
            byte[] cmd = new byte[3];
            byte[] info = new byte[4];

            nRet = K720.K720_SensorQuery(K720.Instance.ComHandle, K720.Instance.MacAddr, info, K720.Instance.RecordInfo);
            if (nRet != 0)
            {
                textBox1.Text = "check card position failed";
                return;
            }
            if ((info[0] & 0x04) == 0x04)//设备故障，需要复位
            {
                cmd[0] = (byte)'R';
                cmd[1] = (byte)'S';
                nRet = K720.K720_SendCmd(K720.Instance.ComHandle, K720.Instance.MacAddr, cmd, 2, K720.Instance.RecordInfo);
                if (nRet != 0)
                {
                    textBox1.Text = "reset failed";
                    return;
                }
                Thread.Sleep(1500);
            }
            if ((info[3] & 0x03) != 0x00)
            {
                textBox1.Text = "通道有卡，不能执行进卡操作";
                return;
            }
            cmd[0] = (byte)'F';
            cmd[1] = (byte)'C';
            cmd[2] = (byte)'8';
            nRet = K720.K720_SendCmd(K720.Instance.ComHandle, K720.Instance.MacAddr, cmd, 3, K720.Instance.RecordInfo);
            if (nRet != 0)
            {
                textBox1.Text = "enter card failed";
                return;
            }
            textBox1.Text = "前端进卡成功";
        }

        private void button7_Click(object sender, EventArgs e)
        {
            int nRet;
            nRet = K720.K720_S50DetectCard(K720.Instance.ComHandle, K720.Instance.MacAddr, K720.Instance.RecordInfo);
            if (nRet == 0)
            {
                textBox1.Text = "Detect Card Success";
            }
            else
                textBox1.Text = "Detect Card Failed";
        }

        private void button8_Click(object sender, EventArgs e)
        {
            int nRet;
            byte[] CardId = new byte[10];
            string str;
            nRet = K720.K720_S50GetCardID(K720.Instance.ComHandle, K720.Instance.MacAddr, CardId, K720.Instance.RecordInfo);
            if (nRet == 0)
            {
                str = CardId[0].ToString("X2") + " " + CardId[1].ToString("X2") + " " + CardId[2].ToString("X2") + " " + CardId[3].ToString("X2");
                MessageBox.Show(str, "Card ID", MessageBoxButtons.OK, MessageBoxIcon.Information);
                textBox1.Text = "Get Card ID Success";
            }
            else
                textBox1.Text = "Get Card ID Failed";
        }

        private void button9_Click(object sender, EventArgs e)
        {
            int nRet;
            byte[] ReadData = new byte[20];
            string str, str1;

            nRet = K720.K720_S50ReadBlock(K720.Instance.ComHandle, K720.Instance.MacAddr, (byte)comboBox3.SelectedIndex, (byte)comboBox4.SelectedIndex, ReadData, K720.Instance.RecordInfo);
            if (nRet == 0)
            {
                str = "";
                for (int i = 0; i < 16; i++)
                {
                    str += ReadData[i].ToString("X2");
                }
                textBox3.Text = str;
                textBox1.Text = "Read Data Success";
            }
            else
            {
                // "X2" formats it as uppercase Hex with at least 2 digits (e.g., 0x0A)
                // You can use just "X" if you don't care about leading zeros.
                String message = "Read Data Failed 0x" + nRet.ToString("X2");
                textBox1.Text = message;
            }
            //int nRet;
            //byte[] WriteData = new byte[16];
            //string str;

            //str = textBox3.Text;
            //if(str.Length > 32)
            //{
            //    MessageBox.Show("长度太长");
            //    return;
            //}
            //else if(str.Length < 32)
            //{
            //    MessageBox.Show("长度太短");
            //    return;
            //}
            //StringToArray(str, WriteData);

            //nRet = K720_S50WriteBlock(ComHandle, MacAddr, (byte)comboBox3.SelectedIndex, (byte)comboBox4.SelectedIndex, WriteData, RecordInfo);
            //if(nRet == 0)
            //{
            //    textBox1.Text = "Write Data Success";
            //}
            //else
            //{
            //    textBox1.Text = "Write Data Failed";
            //}
        }

        private String hexTostr(byte[] data, int length)
        {
            String str = "";
            for (int i = 0; i < length; i++)
            {
                str += data[i].ToString("X2");
            }
            return str;
        }

        public byte CharToHex(char ch)
        {
            if (ch >= 48 && ch <= 57)
            {
                return (byte)((byte)ch - 48);
            }
            else if (ch >= 65 && ch <= 70)
            {
                return (byte)((byte)ch - 65 + 10);
            }
            else if (ch >= 97 && ch <= 102)
            {
                return (byte)((byte)ch - 65 + 10);
            }
            else
                return 0;
        }

        public void StringToArray(string str, byte[] recv)
        {
            if (str.Length % 2 == 1)
                str = "0" + str;
            for (int i = 0; i < str.Length / 2; i++)
            {
                recv[i] = (byte)((byte)CharToHex(str[2 * i]) * 16 + (byte)CharToHex(str[2 * i + 1]));
            }
        }
        private void button10_Click(object sender, EventArgs e)
        {
            string strpassword;
            int nRet;
            byte[] Password = new byte[10];

            strpassword = textBox2.Text;
            if (strpassword.Length != 12)
            {
                MessageBox.Show("PassWord length is not six byte hex", "Message", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }

            StringToArray(strpassword, Password);

            nRet = K720.K720_S50LoadSecKey(K720.Instance.ComHandle, K720.Instance.MacAddr, (byte)comboBox3.SelectedIndex, (byte)(comboBox5.SelectedIndex + 0x30), Password, K720.Instance.RecordInfo);
            if (nRet == 0)
            {
                textBox1.Text = "Verify Password Success";
            }
            else
                textBox1.Text = "Verify Password Failed";
        }

        private void groupBox5_Enter(object sender, EventArgs e)
        {

        }

        private void groupBox12_Enter(object sender, EventArgs e)
        {

        }

        static String command = "NOP";
        private void button26_Click(object sender, EventArgs e)
        {
            if (command == "Dispense")
            {
                K720.Instance.SendCmd(K720.CardCommand.Dispense);
            }
            if (command == "Recycle")
            {
                K720.Instance.SendCmd(K720.CardCommand.Recycle);
            }

            if (command == "Read")
            {
                K720.Instance.SendCmd(K720.CardCommand.Read);
            }

            if (command == "Return")
            {
                K720.Instance.SendCmd(K720.CardCommand.Return);
            }
        }
        // Maps the user-friendly dropdown selection to the actual command code
        private void textBox17_TextChanged(object sender, EventArgs e)
        {
            TextBox textBox = sender as TextBox;

            if (textBox != null)
            {
                command = textBox.Text;

                Console.WriteLine(command);
            }
        }
        private void btnWrite_Click(object sender, EventArgs e)
        {
            byte sectorAddr = (byte)comboBox3.SelectedIndex;
            byte blockAddr = (byte)comboBox4.SelectedIndex;

            // 1. Hard Block: Prevent writing to the Manufacturer Block (Sector 0, Block 0)
            if (sectorAddr == 0 && blockAddr == 0)
            {
                textBox1.Text = "Write Error: Cannot write to Sector 0, Block 0 (Manufacturer/UID block).";
                return;
            }

            // 2. Warning Check: If user selects Block 3 (Sector Trailer)
            if (blockAddr == 3)
            {
                string warnMsg = $"Warning: You are attempting to write to Sector {sectorAddr}, Block 3.\n\n" +
                                 "This is the Sector Trailer. Writing data here overwrites your access keys. " +
                                 "If the formatting is wrong, this sector will be permanently locked.\n\n" +
                                 "Do you want to proceed?";

                DialogResult result = MessageBox.Show(warnMsg, "Critical Security Warning",
                                                      MessageBoxButtons.YesNo, MessageBoxIcon.Warning);

                if (result == DialogResult.No)
                {
                    textBox1.Text = "Write canceled by user (Protected Block 3).";
                    return;
                }
            }

            byte keyType = 0x30; // Key A (Try switching to 0x31 for Key B if Key A fails)
            byte[] keyData = new byte[] { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };

            // Prepare 16 bytes of data to write from textBox18
            byte[] writeData = new byte[16];
            string inputHex = textBox3.Text.Trim();
            for (int i = 0; i < 16; i++)
            {
                if (i * 2 + 2 <= inputHex.Length)
                {
                    writeData[i] = Convert.ToByte(inputHex.Substring(i * 2, 2), 16);
                }
                else
                {
                    writeData[i] = 0x00;
                }
            }

            Task.Run(() =>
            {
                int nRet;
                char[] recordInfo = new char[256];

                // 1. Detect Card
                nRet = K720.K720_S50DetectCard(K720.Instance.ComHandle, K720.Instance.MacAddr, recordInfo);
                if (nRet != 0)
                {
                    Invoke(new Action(() => { textBox1.Text = "Card Detection Failed 0x" + nRet.ToString("X2"); }));
                    return;
                }

                // 2. Authenticate Key immediately prior to writing
                nRet = K720.K720_S50LoadSecKey(K720.Instance.ComHandle, K720.Instance.MacAddr, sectorAddr, keyType, keyData, recordInfo);
                if (nRet != 0)
                {
                    Invoke(new Action(() => { textBox1.Text = "Key Authentication Failed 0x" + nRet.ToString("X2"); }));
                    return;
                }

                // 3. Execute Write Block
                nRet = K720.K720_S50WriteBlock(K720.Instance.ComHandle, K720.Instance.MacAddr, sectorAddr, blockAddr, writeData, recordInfo);
                if (nRet == 0)
                {
                    Invoke(new Action(() => { textBox1.Text = "Write Data Success"; }));
                }
                else
                {
                    string message = "Write Data Failed 0x" + nRet.ToString("X8"); // Show full hex error format
                    Invoke(new Action(() => { textBox1.Text = message; }));
                }
            });
        }

        static String buffer = String.Empty;
        private void btnRead_Click(object sender, EventArgs e)
        {
            // Capture necessary UI state on the UI thread before spinning off
            byte sectorAddr = (byte)comboBox3.SelectedIndex;
            byte blockAddr = (byte)comboBox4.SelectedIndex;
            byte keyType = 0x30; // 0x30 for Key A, 0x31 for Key B[cite: 1]
            byte[] keyData = new byte[] { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };

            // Spin off a separate background thread using a lambda expression
            Task.Run(() =>
            {
                int nRet;
                byte[] readData = new byte[20];

                // Allocate a fixed character array buffer for RecordInfo
                char[] recordInfo = new char[256];

                // 1. Detect the S50 card[cite: 1]
                nRet = K720.K720_S50DetectCard(K720.Instance.ComHandle, K720.Instance.MacAddr, recordInfo);
                if (nRet != 0)
                {
                    Invoke(new Action(() =>
                    {
                        textBox1.Text = "Card Detection Failed 0x" + nRet.ToString("X2");
                    }));
                    return;
                }

                // 2. Load and verify the sector security key[cite: 1]
                nRet = K720.K720_S50LoadSecKey(K720.Instance.ComHandle, K720.Instance.MacAddr, sectorAddr, keyType, keyData, recordInfo);
                if (nRet != 0)
                {
                    Invoke(new Action(() =>
                    {
                        textBox1.Text = "Key Authentication Failed 0x" + nRet.ToString("X2");
                    }));
                    return;
                }

                // 3. Read the target block data[cite: 1]
                nRet = K720.K720_S50ReadBlock(K720.Instance.ComHandle, K720.Instance.MacAddr, sectorAddr, blockAddr, readData, recordInfo);
                if (nRet == 0)
                {
                    string str = "";
                    for (int i = 0; i < 16; i++)
                    {
                        str += readData[i].ToString("X2"); // Formats each byte as uppercase Hex[cite: 1]
                    }

                    // Safely update UI controls from the background thread
                    Invoke(new Action(() =>
                    {
                        textBox3.Text = str;
                        textBox1.Text = "Read Data Success";
                    }));
                }
                else
                {
                    string message = "Read Data Failed 0x" + nRet.ToString("X2");
                    Invoke(new Action(() =>
                    {
                        textBox1.Text = message;
                    }));
                }
            });
        }

        private void textBox18_TextChanged(object sender, EventArgs e)
        {
            TextBox textBox = sender as TextBox;

            if (textBox != null)
            {
                buffer = textBox.Text;

                Console.WriteLine(buffer);
            }
        }

        private void comboBox6_SelectedIndexChanged(object sender, EventArgs e)
        {
            ComboBox comboBox = sender as ComboBox;

            if (comboBox != null && comboBox.SelectedItem != null)
            {
                string selectedItem = comboBox.SelectedItem.ToString();
                command = selectedItem;
            }
        }
        private void btnDispense_Click(object sender, EventArgs e)
        {
            // 1. Simulate a payload matching what the API would receive
            var fakePayload = new CardTaskResponse { Command = "Dispense" };

            // 2. Call the identical central hardware router
            dynamic result = _manager.ExecuteHardwareCommand(fakePayload);

            // 3. Update UI based on the response layout
            if (result.status == "success")
            {
                textBox1.Text = $"Dispensed! Device code: {result.hardwareResponse}";
            }
            else
            {
                MessageBox.Show($"Error: {result.message}");
            }
        }

        private void btnClearLog(object sender, EventArgs e)
        {
            Utils.ClearLog();
            rtbLogs.Text = "";
        }
    }
}