using Godot;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Net.Mime;
using System.Runtime.InteropServices;
using System.Threading;
using System.Timers;
using BITKit;
using Cysharp.Threading.Tasks;
using SharpModbus;
using Timer = System.Timers.Timer;

namespace BITFactory;
public partial class 温湿度Reader : Node
{
	[ExportCategory("参数")]
	[Export(PropertyHint.Range,"100,2000")] private int interval=500;
	
	[ExportCategory("网络设置")]
	[Export] private string ip="192.168.3.7";
	[Export] private int port=502;
	
	[ExportCategory("运行时")]
	[Export]public double humidity = 50.0;
	[Export]public double temperature = 26.0;
	
	[ExportCategory("UI 绑定")]
	[Export] private Button connectToModbusButton;
	[Export] private UXContainer temperatureContainer;
	[Export] private UXContainer humidityContainer;
	[Export] private LineEdit ipEdit;
	[Export] private LineEdit portEdit;
	[Export] private RichTextLabel hintsLabel;
	
	private ModbusMaster _modbus;
	private Timer timer;
	private CancellationTokenSource _CancellationTokenSource;

	public override void _Ready()
	{
		_CancellationTokenSource = new CancellationTokenSource();
		try
		{
			_modbus = ModbusMaster.TCP(ip, port);
		}
		catch (Exception e)
		{
			hintsLabel.Text = e.Message;
		}
		
		ipEdit.TextChanged+=s=>ip=s;
		portEdit.TextChanged+=s=>
		{
			try
			{
				port = int.Parse(s);
			}
			catch (Exception e)
			{
				hintsLabel.SetTextAsync(e.Message);
			}
		};
		connectToModbusButton.Pressed += Connect;

		Connect();

		timer = new Timer();
		timer.Interval = interval;
		timer.Elapsed += OnTimerElapsed;
		timer.AutoReset = false;		
		timer.Start();
	}

	public override void _ExitTree()
	{
		_CancellationTokenSource.Cancel();
		timer.Stop();
	}
	/// <summary>
	/// 连接到Modbus
	/// </summary>
	private void Connect()
	{
		_modbus?.Dispose();
		try
		{
			_modbus = ModbusMaster.TCP(ip, port);
		}
		catch (Exception e)
		{
			BIT4Log.Log<温湿度Reader>(e.Message);
			hintsLabel.SetTextAsync(e.Message);
		}
	}
	/// <summary>
	/// 内部方法,定时器回调用于读取Modbus
	/// </summary>
	/// <param name="sender"></param>
	/// <param name="e"></param>
	private async void OnTimerElapsed(object sender, ElapsedEventArgs e)
	{
		await UniTask.SwitchToTaskPool();
		try
		{
			if (_modbus is null)
			{
				hintsLabel.SetTextAsync("Modbus未初始化");
				timer.Start();
				return;
			}
			
			_CancellationTokenSource.Token.ThrowIfCancellationRequested();
			hintsLabel.SetTextAsync( "正在读取温湿度数据..."+DateTime.Now);
			
			var vs = _modbus.ReadInputRegisters(1, 0, 2);
			
			_CancellationTokenSource.Token.ThrowIfCancellationRequested();
			
			hintsLabel.SetTextAsync( "已采集到数据,正在解析..."+DateTime.Now);

			if (vs is not { Length: 2 })
			{
				hintsLabel.SetTextAsync(hintsLabel.Text = $"获取温湿度数据失败:数据长度为:{vs.Length}"+DateTime.Now);
				
				return;
			}
			
			temperature = vs[0] / 10.0;
			humidity = vs[1] / 10.0;

			hintsLabel.SetTextAsync("已获取到温湿度数据:"+DateTime.Now);

			temperatureContainer.label.SetTextAsync(temperature.ToString(CultureInfo.InvariantCulture)); ;
			humidityContainer.label.SetTextAsync(humidity.ToString(CultureInfo.InvariantCulture));
			
			timer.Start();
		}
		catch (OperationCanceledException)
		{
			BIT4Log.Log<温湿度Reader>($"Modbus读取任务已取消");
		}
		catch (Exception ex)
		{
			hintsLabel.SetTextAsync(ex.Message);
			timer.Start();
		}
		
	}

}