using MoniteurBaie.DataModels;
using MoniteurBaie.Utils;

namespace MoniteurBaie.SerialCom;

public sealed class MockBatteryController : IBatteryController
{
    private readonly List<IObserver<BatteryControllerPacket>> _serialObservers = new();
    private readonly BlockingListener<string> _commandListener = new();

    public Task Open(CancellationToken cancellationToken)
    {
        var readThread = new Thread(DoRead)
        {
            IsBackground = true
        };
        readThread.Start();

        var writeThread = new Thread(DoWrite)
        {
            IsBackground = true
        };
        writeThread.Start();

        return Task.CompletedTask;
    }

    public IDisposable AddSerialObserver(IObserver<BatteryControllerPacket> observer)
    {
        _serialObservers.Add(observer);
        return new Disposer(() => _serialObservers.Remove(observer));
    }

    public Task SendCommand(string command, CancellationToken cancellationToken)
    {
        _commandListener.Push(command);

        return Task.CompletedTask;
    }

    private void DoRead()
    {
        while (true)
        {
            var packet = CreateFakePacket();

            foreach (var observer in _serialObservers)
            {
                observer.OnNext(packet);
            }
        }
    }

    private static BatteryControllerPacket CreateFakePacket()
    {
        Thread.Sleep(Random.Shared.Next(1000 - 50, 1000 + 50));

        return new(
            DateTime.Now,
            $"COM,{Random.Shared.NextSingle()},{Random.Shared.NextSingle()},{Random.Shared.NextSingle()},{Random.Shared.NextSingle()},{Random.Shared.NextSingle()},{Random.Shared.NextSingle()},{Random.Shared.NextSingle()},{Random.Shared.NextSingle()},{Random.Shared.NextSingle()},{Random.Shared.NextSingle()},{Random.Shared.NextSingle()},{Random.Shared.NextSingle()},{Random.Shared.NextSingle()},{Random.Shared.NextSingle()},{Random.Shared.NextSingle()},{Random.Shared.Next(2)},{Random.Shared.Next(2)},{Random.Shared.Next(2)},{Random.Shared.Next(2)},{Random.Shared.Next(2)},{Random.Shared.Next(2)},{Random.Shared.Next(2)},{Random.Shared.Next(2)},{Random.Shared.Next(2)},{Random.Shared.Next(2)},{Random.Shared.Next(2)},{Random.Shared.Next(2)},{Random.Shared.Next(2)},{Random.Shared.Next(2)},{Random.Shared.Next(2)},{Random.Shared.Next(2)},{Random.Shared.Next(2)},{Random.Shared.Next(2)},{Random.Shared.Next(2)},{Random.Shared.Next(100)},{Random.Shared.Next(100)},{Random.Shared.Next(2)},{Random.Shared.Next(2)},{Random.Shared.Next(2)},{Random.Shared.Next(2)},{Random.Shared.Next(2)}");
    }

    private void DoWrite()
    {
        try
        {
            while (true)
            {
                _commandListener.Next();
            }
        }
        catch (ObjectDisposedException)
        {
        }
    }

    #region IObservable

    IDisposable IObservable<BatteryControllerPacket>.Subscribe(IObserver<BatteryControllerPacket> observer)
    {
        return AddSerialObserver(observer);
    }

    #endregion

    #region IObserver

    void IObserver<string>.OnCompleted()
    {

    }

    void IObserver<string>.OnError(Exception error)
    {

    }

    void IObserver<string>.OnNext(string value)
    {
        SendCommand(value, default);
    }

    #endregion

    #region IDisposable

    private bool _disposedValue;

    private void Dispose(bool disposing)
    {
        if (!_disposedValue)
        {
            if (disposing)
            {
                _commandListener.Dispose();
            }

            _disposedValue = true;
        }
    }

    public void Dispose()
    {
        Dispose(disposing: true);
        GC.SuppressFinalize(this);
    }

    #endregion
}