using System;
using System.Collections.Concurrent;
using System.Threading;
using System.Threading.Tasks;
using H.Formatters;
using H.Pipes;
using InABox.Core;
using InABox.IPC;
using InABox.Logikal;
using java.lang;
using Exception = System.Exception;
using Process = System.Diagnostics.Process;

namespace PRSDesktop;

public class LogikalClient : IDisposable, ILogikalApp
{

    private readonly PipeClient<LogikalMessage> _client;
    
    private ConcurrentDictionary<Guid, ManualResetEventSlim> Events = new();
    private ConcurrentDictionary<Guid, LogikalMessage> Responses = new();

    private const int DefaultRequestTimeout = 5 * 60 * 1000; // 5 minutes
    
    public LogikalClient()
    {
        var _basedirectory = System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location) ?? "";
        var _logikalapp = System.IO.Path.Combine(_basedirectory, "PRSLogikal", "PRSLogikal.exe");
        Process.Start(_logikalapp);
        
        _client = new PipeClient<LogikalMessage>("$logikal", formatter: new NewtonsoftJsonFormatter());
        
        _client.Connected += Client_Connected;
        _client.Disconnected += Client_Disconnected;
        _client.MessageReceived += Client_MessageReceived;
        _client.ExceptionOccurred += Client_ExceptionOccurred;

        _client.ConnectAsync();
    }
    
    public void Dispose()
    {
        _client.DisposeAsync().AsTask().Wait();
    }
    
    private void Client_Connected(object? sender, H.Pipes.Args.ConnectionEventArgs<LogikalMessage> e)
    {
        Logger.Send(LogType.Information, "", $"Connected to Pipe: {e.Connection.PipeName}");
        //Disconnected = false;
        // Here we will register a Licence "Hit" for the Logikal interface
    }

    private void Client_Disconnected(object? sender, H.Pipes.Args.ConnectionEventArgs<LogikalMessage> e)
    {
        Logger.Send(LogType.Information, "", $"Disconnected from Pipe: {e.Connection.PipeName}");
        foreach (var ev in Events)
        {
            Responses.TryAdd(ev.Key, LogikalMessage.Error("Disconnected"));
            ev.Value.Set();
        }
        //Disconnected = true;
    }
    
    private void Client_ExceptionOccurred(object? sender, H.Pipes.Args.ExceptionEventArgs e)
    {
        Logger.Send(LogType.Error, "", $"Exception occured: {e.Exception.Message}");
    }
    
    public LogikalResponse Send(LogikalRequest request, int timeout = DefaultRequestTimeout)
    {
        var message = new LogikalMessage()
        {
            ID = Guid.NewGuid(),
            Method = request.Method(),
            Payload = Serialization.Serialize(request),
        };
        var ev = Queue(message.ID);
        _client.WriteAsync(message);
        var result = GetResult(message.ID, ev, timeout);
        return LogikalResponse.FromMessage(result);
    }

    public ManualResetEventSlim Queue(Guid id)
    {
        var ev = new ManualResetEventSlim();
        Events[id] = ev;
        return ev;
    }

    public LogikalMessage GetResult(Guid id, ManualResetEventSlim ev, int timeout)
    {
        if (Responses.TryRemove(id, out var result))
        {
            Events.TryRemove(id, out ev);
            return result;
        }

        try
        {
            if (!ev.Wait(timeout))
            {
                return LogikalMessage.Error("Timeout");
            }
        }
        catch (Exception e)
        {
            Console.WriteLine(e);
            throw;
        }
            
        Responses.TryRemove(id, out result);
        Events.TryRemove(id, out ev);
        return result ?? LogikalMessage.Error("Unknown");
    }

    private void Client_MessageReceived(object? sender, H.Pipes.Args.ConnectionMessageEventArgs<LogikalMessage?> e)
    {
        if (Events.TryGetValue(e.Message.ID, out var ev))
        {
            Responses[e.Message.ID] = e.Message;
            ev.Set();
        }
    }
    
    ~LogikalClient()
    {
        Dispose();
    }

    public LogikalStatus Connect(string path)
    {
        var request = new LogikalConnectRequest() { Path = path };
        var result = Send(request);
        return result.Status;

    }

    public LogikalStatus Disconnect()
    {
        var request = new LogikalDisconnectRequest();
        var result = Send(request);
        return result.Status;
    }

    public LogikalStatus Login(string username, string password)
    {
        var request = new LogikalLoginRequest() { UserID = username, Password = password };
        var result = Send(request);
        return result.Status;
    }

    public LogikalStatus Logout()
    {
        var request = new LogikalLogoutRequest();
        var result = Send(request);
        return result.Status;
    }
}