using System;
using System.Collections.ObjectModel;
using System.Diagnostics;
using System.Linq;
using System.Reactive;
using System.Threading;
using LoraGamepad.Models;
using LoraGamepad.Util;
using ReactiveUI;

namespace LoraGamepad.ViewModels;

public class TProViewModel : ViewModelBase
{
    
    private bool _isOpenPortButtonVisible = true;
    private bool _isClosePortButtonVisible;
    
    private ObservableCollection<CBPortItem> _portList = new();
    public CBPortItem PortSelectItem { get; set; }
    public SliderConfig SliderValue { get; set; }

    private readonly SerialPipeIn _serialPipeIn;
    private readonly CrsfParserPipeIn _crsfParserPipeIn;
    public ReactiveCommand<Unit, Unit> OpenPort { get; }
    public ReactiveCommand<Unit, Unit> ClosePort { get; }

    public Thread ReadThread;
    public TProViewModel()
    {
        SliderValue = new SliderConfig();
        
        PortList = CBPortItem.GetPortList();
        _serialPipeIn = new SerialPipeIn();
        _crsfParserPipeIn = new CrsfParserPipeIn();
        _serialPipeIn.OnOut += _crsfParserPipeIn.Push;
        _crsfParserPipeIn.OnOut += data =>
        {
            SliderValue.RightHorizonValue = data.channel[0];
            SliderValue.RightVerticalValue = data.channel[1];
            SliderValue.LeftHorizonValue = data.channel[2];
            SliderValue.LeftVerticalValue = data.channel[3];
        };
        ReadThread = new Thread(ReadThreadEntry);
        
        OpenPort = ReactiveCommand.Create(PortOpenButtonClick);
        ClosePort = ReactiveCommand.Create(PortCloseButtonClick);

    }
    
    public void ReadThreadEntry()
    {
        while (true)
        {
            if (SerialPort.Me.TryRead(out var data))
            {
                // Console.WriteLine(BitConverter.ToString(data));
                _serialPipeIn.Push(data);
            }
            SpinWait.SpinUntil(() => false, 1);
        }
    }
    
    /// <summary>
    /// ComboBox串口列表绑定对象
    /// </summary>
    public ObservableCollection<CBPortItem> PortList
    {
        get => _portList;
        set => this.RaiseAndSetIfChanged(ref _portList, value);
    }
    
    /// <summary>
    /// 刷新串口列表事件处理函数
    /// </summary>
    public void OnPortListComboBoxPressed()
    {
        var newList = CBPortItem.GetPortList();
        PortList.Except(newList,new CBPortItemCompare()).ToList().ForEach(a => { PortList.Remove(a); });
        newList.Except(PortList, new CBPortItemCompare()).ToList().ForEach(a => { PortList.Add(a); });
        newList.Except(PortList, new CBPortItemCompare()).ToList().ForEach(a => { PortList.Add(a); });
    }
    
    /// <summary>
    /// 关闭串口按键可见性属性
    /// </summary>
    public bool IsClosePortButtonVisible
    {
        get => _isClosePortButtonVisible;
        set => this.RaiseAndSetIfChanged(ref _isClosePortButtonVisible, value);
    }
    
    /// <summary>
    /// 打开串口按键可见性属性
    /// </summary>
    public bool IsOpenPortButtonVisible
    {
        get => _isOpenPortButtonVisible;
        set => this.RaiseAndSetIfChanged(ref _isOpenPortButtonVisible, value);
    }
    
    /// <summary>
    /// 打开串口按键响应
    /// </summary>
    private void PortOpenButtonClick()
    {
        if (PortSelectItem.PortName == "") return;
        SerialPort.Me.Open(PortSelectItem.PortName,115200,1000);
        IsOpenPortButtonVisible = false;
        IsClosePortButtonVisible = true;
        ReadThread.Start();
    }
    
    /// <summary>
    /// 关闭串口按键响应
    /// </summary>
    private void PortCloseButtonClick()
    {
        SerialPort.Me.Close();
        IsOpenPortButtonVisible = true;
        IsClosePortButtonVisible = false;
    }

}