using Godot;
using System;
using System.Threading;
using System.Timers;
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,"100,1000")] 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 Label temperatureLabel;
	[Export] private Label humidityLabel;
	
	private ModbusMaster _modbus;
	private System.Timers.Timer timer;
	private CancellationTokenSource _CancellationTokenSource;
	public override void _Ready()
	{
		_CancellationTokenSource = new CancellationTokenSource();
		_modbus = ModbusMaster.TCP(ip, port);

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

	public override void _ExitTree()
	{
		timer.Stop();
	}

	private async void OnTimerElapsed(object sender, ElapsedEventArgs e)
	{
		_CancellationTokenSource.Cancel();
		await UniTask.SwitchToTaskPool();
		try
		{
			_CancellationTokenSource.Token.ThrowIfCancellationRequested();
			
			var vs = _modbus.ReadInputRegisters(1, 0, 2);

			_CancellationTokenSource.Token.ThrowIfCancellationRequested();

			if (vs is not { Length: 2 }) return;
			temperature = vs[0] / 10.0;
			humidity = vs[1] / 10.0;
		}
		catch (OperationCanceledException)
		{
		}
		catch (Exception ex)
		{
			GD.Print("ex:" + ex);
		}
	}
}