using System;
using System.Collections.Generic;
using System.Threading;
using Autolabor;

namespace LoraGamepad.Models;

/// <summary>
/// 串口驱动封装单例模式
/// </summary>
public class SerialPort
{
    /// <summary>
    /// 串口单例
    /// </summary>
    public static readonly SerialPort Me = new();

    /// <summary>
    /// 串口驱动基类
    /// </summary>
    private readonly SerialBase _serial = new();
    
    private bool _isPortOpen = false;

    private Action? _onWriteError;
    /// <summary>
    /// 串口是否打开属性
    /// </summary>
    public bool IsPortOpen => _isPortOpen;
    
    /// <summary>
    /// 搜索串口列表
    /// </summary>
    /// <returns></returns>
    public static List<SerialDevice> FindPorts()
    {
        return SerialBase.EnumeratePorts();
    }

    public void LisenningPort(Action? onWriteError)
    {
        _onWriteError = onWriteError;
    }
    
    /// <summary>
    /// 保护性构造函数
    /// </summary>
    private SerialPort() { }
    
    /// <summary>
    /// 打开串口
    /// </summary>
    /// <param name="port">串口名</param>
    /// <param name="baudRate">波特率</param>
    /// <param name="timeout">超时时间</param>
    public void Open(string port,int baudRate,int timeout)
    {
        _serial.Port = port;
        _serial.Baudrate = baudRate;
        _serial.ReadTimeout = timeout;
        try
        {
            _serial.Open();
            _isPortOpen = true;
        }
        catch (SerialBaseException e)
        {
            Console.WriteLine(e);
        }
    }
    
    /// <summary>
    /// 串口发送
    /// </summary>
    /// <param name="data">Byte数据</param>
    public void Write(byte[] data)
    {
        try
        {
            if (Me.IsPortOpen)
            {
                _serial.Write(data);
            }
        }
        catch (SerialBaseException e)
        {
            _onWriteError?.Invoke();
            Console.WriteLine(e);
        }
    }
    
    /// <summary>
    /// 读取串口
    /// </summary>
    /// <returns>Byte数组</returns>
    public byte[] Read()
    {
        try
        {
            return _serial.Read(); 
        }
        catch (SerialBaseException e)
        {
            Console.WriteLine("My Line:" + e);
            return Array.Empty<byte>();
        }
    }

    public bool TryRead(out byte[] data)
    {
        if (_isPortOpen)
        {
            try
            {
                data = _serial.Read();
                return true;
            }
            catch (Exception e)
            {
                Console.WriteLine(e);
            }
        }
        data = Array.Empty<byte>();
        return false;
    }

    /// <summary>
    /// 关闭串口
    /// </summary>
    public void Close()
    {
        try
        {
            _isPortOpen = false;
            _serial.Close();
        }
        catch (SerialBaseException e)
        {
            Console.WriteLine(e);
        }
    }
}