using Microsoft.Win32;
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;

namespace GUI
{
    public partial class ComConfig : Form, IComAgentDelegate
    {
        ComAgent agent;

        public ComConfig()
        {
            InitializeComponent();
            serialOutput.ScrollBars = ScrollBars.Vertical;
            agent = new ComAgent();
            agent.agentDelegate = this;
        }

        void ClearOutput()
        {
            serialOutput.Text = "";
            agent.Close();
            CloseButton.Enabled = false;
            goodMessageReceived = false;
        }

        void RefreshPort()
        {
            ClearOutput();
            RegistryKey keyCom = Registry.LocalMachine.OpenSubKey("Hardware\\DeviceMap\\SerialComm");
            if (keyCom != null)
            {
                string[] sSubKeys = keyCom.GetValueNames();
                sPort.Items.Clear();
                foreach (string sName in sSubKeys)
                {
                    string sValue = (string)keyCom.GetValue(sName);
                    sPort.Items.Add(sValue);
                }
                if (sPort.Items.Count > 0)
                    sPort.SelectedIndex = 0;
            }
        }

        private void ComConfig_Load(object sender, EventArgs e)
        {
            RefreshPort();
        }

        private void sPort_SelectedIndexChanged(object sender, EventArgs e)
        {
            ClearOutput();
            agent.PortName = sPort.Text;
        }

        private void sRate_SelectedIndexChanged(object sender, EventArgs e)
        {
            ClearOutput();
            agent.BaudRate = int.Parse(sRate.Text);
        }

        private void CloseClick(object sender, EventArgs e)
        {
            if (!goodMessageReceived)
            {
                if (MessageBox.Show(
                    "截止到目前，还没有从该串口接收到一条通过校验的数据，是否仍然继续连接？",
                    "串口连接提示",
                    MessageBoxButtons.OKCancel, MessageBoxIcon.Warning) == DialogResult.Cancel)
                    return;
            }
            agent.agentDelegate = null;
            Program.comAgent = agent;
            Close();
        }

        private void RefreshClick(object sender, EventArgs e)
        {
            RefreshPort();
        }

        private void TryConnectionClick(object sender, EventArgs e)
        {
            try
            {
                agent.Open();
                agent.SendFrame();
                CloseButton.Enabled = true;
            }
            catch (Exception ex)
            {
                WriteLine(ex.Message);
            }
        }

        void WriteLine(string msg)
        {
            serialOutput.BeginInvoke((Action)(() =>
            {
                if (serialOutput.Text.Length < 10000)
                    serialOutput.AppendText(msg + "\r\n");
            }));
        }

        public void ReceiveError(string msg)
        {
            ClearOutput();
            WriteLine(msg);
        }

        bool goodMessageReceived = false;

        public void ReceiveSuccess()
        {
            WriteLine("Receive good message.");
            goodMessageReceived = true;
            CloseButton.Enabled = true;
        }
    }
}