using MasterClient.Client;
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 MasterClient
{
	public partial class MainForm : Form
	{
		private bool isFirstLog = true;
		private ICommClient client;

		public MainForm()
		{
			InitializeComponent();
		}
		
		private void ChangeStatus(bool status)
		{
			btnConnect.Enabled = !status;
			tbIP.Enabled = !status;
			nudPort.Enabled = !status;
			nudIdentifier.Enabled = !status;

			btnDisconnect.Enabled = status;
			tbStatus.Text = status ? "Connected" : "Disconnected";
			tbStatus.BackColor = status ? Color.Lime : Color.Silver;

			gbMode.Enabled = !status;

			Log(status ? "--- Connected ---" : "--- Disconnected ---");
		}

		private void Log(string text)
		{
			rtbLog.AppendText((isFirstLog ? "" : Environment.NewLine) + text);
			isFirstLog = false;

			ScrollToEnd();
		}

		private void ScrollToEnd()
		{
			if (!chkAutoScroll.Checked)
				return;

			rtbLog.SelectionStart = rtbLog.Text.Length;
			rtbLog.ScrollToCaret();
		}

		private void ClearLog()
		{
			rtbLog.Clear();
			isFirstLog = true;
			ScrollToEnd();
		}

		private void btnConnect_Click(object sender, EventArgs e)
		{
			try
			{
				InitServer();

				client.SetServer(tbIP.Text, (int)nudPort.Value);
				client.Connect();

				ChangeStatus(true);
			}
			catch (Exception ex)
			{
				Log($"[ERROR] {ex.Message}");
			}
		}

		private void InitServer()
		{
			if (client != null && client.GetStatus())
			{
				Log("--- Disconnect previous connection ---");
				btnDisconnect_Click(null, null);
			}

			if (chkModbus.Checked)
			{
				client = new Client.ModbusMaster((byte)nudIdentifier.Value);
				Log("--- Run as Modbus mode ---");
			}
			else if (chkOPCUA.Checked)
			{
				Log("--- Run as OPCUA mode ---");
			}
			else if (chkSdk.Checked)
			{
				Log("--- Run as SDK mode ---");
			}
		}

		private void btnDisconnect_Click(object sender, EventArgs e)
		{
			try
			{
				client.Disconnect();

				ChangeStatus(false);
			}
			catch (Exception ex)
			{
				Log($"[ERROR] {ex.Message}");
			}
		}

		private void btnRead_Click(object sender, EventArgs e)
		{
			try
			{
				if (!client.GetStatus())
					throw new Exception("Disconneced");

				string value = client.ReadValue(tbReadName.Text);
				Log($"[READ] {tbReadName.Text}:{value}");
			}
			catch (Exception ex)
			{
				Log($"[ERROR] {ex.Message}");
			}
		}

		private void btnWrite_Click(object sender, EventArgs e)
		{
			try
			{
				if (!client.GetStatus())
					throw new Exception("Disconneced");

				client.WriteValue(tbWriteName.Text, tbWriteValue.Text);
				Log($"[WRITE] {tbWriteName.Text}:{tbWriteValue.Text}");
			}
			catch (Exception ex)
			{
				Log($"[ERROR] {ex.Message}");
			}
		}

		private void btnClear_Click(object sender, EventArgs e)
		{
			ClearLog();
		}
	}
}