using Godot;
using System;
using System.Globalization;
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,"100,1000")] 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 UXContainer temperatureContaier;
	[Export] private UXContainer humidityContainer;
	[Export] private LineEdit ipEdit;
	[Export] private LineEdit portEdit;
	[Export] private RichTextLabel hintsLabel;
	
	private ModbusMaster _modbus;
	private System.Timers.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;
		}
		

		if (ipEdit is not null)
		{
			ipEdit.TextChanged += s => ip = s;
			ipEdit.TextSubmitted +=s=> UpdatePortAndIP();
		}
		if(portEdit is not null)
		{
			portEdit.TextSubmitted += OnPortChanged;
			void OnPortChanged(string s)
			{
				UpdatePortAndIP();
				if (int.TryParse(s,out var newPort))
				{
				}
				else
				{
					portEdit.Text=string.Empty;
					portEdit.PlaceholderText = "请输入正确的端口号";
				}
			}
		}

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

	public override void _ExitTree()
	{
		timer.Stop();
	}
	
	private void UpdatePortAndIP()
	{
		_modbus.Dispose();
		_modbus = ModbusMaster.TCP(ip, port);
	}

	private async void OnTimerElapsed(object sender, ElapsedEventArgs e)
	{
		SetHints( "正在获取温湿度数据..."+DateTime.Now);
		_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 })
			{
				SetHints(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;

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

			temperatureContaier.Text = temperature.ToString(CultureInfo.InvariantCulture);
			humidityContainer.Text = humidity.ToString(CultureInfo.InvariantCulture);
		}
		catch (OperationCanceledException)
		{
			//SetHints("连接超时:"+DateTime.Now);
		}
		catch (Exception ex)
		{
			SetHints(ex.Message);
			GD.Print("ex:" + ex);
		}
	}

	private async void SetHints(string hints)
	{
		await UniTask.SwitchToSynchronizationContext(BITApp.SynchronizationContext);
		hintsLabel.Text = hints;
	}
}