using System.Net;
using System.Text.Json;
using BuildSoft.OscCore;
using Microsoft.Extensions.Logging;
using VRC.OSCQuery;

namespace GlaxOSC;

public class OSC : IDisposable
{
    private readonly OSCQueryService _oscQuery;
    private readonly OscServer _oscServer;
    public readonly int OSCPort;
    public readonly int TCPPort;
    public readonly OscClient Client;
    private readonly ILogger? _logger;
    private bool _keepRunning = true;
    // ReSharper disable once PrivateFieldCanBeConvertedToLocalVariable
    private readonly Thread _listenThread;
    private const int UpdateInterval = 10;
    internal readonly Dictionary<string, object?> ParameterValues = new();
    
    public OSC(string serviceName, IEnumerable<OSCEndpoint> endpoints, string ipSend = "127.0.0.1", int portSend = 9000, int? portReceive = null, ILogger? logger = null) 
    {
        this._logger = logger;
        this.Client = new OscClient(ipSend, portSend);
        this.OSCPort = portReceive ?? Extensions.GetAvailableUdpPort();
        this.TCPPort = Extensions.GetAvailableTcpPort();
        this._logger?.LogInformation("Setting up OSCQuery");
        this._oscQuery = new OSCQueryServiceBuilder()
            .WithServiceName(serviceName)
            .WithUdpPort(OSCPort)
            .WithTcpPort(TCPPort)
            .WithDefaults()
            .Build();
        
        this._oscServer = new OscServer(OSCPort);
        this.AddEndpoint("/avatar/change", typeof(string));
        foreach (OSCEndpoint endpoint in endpoints)
            this.AddEndpoint(endpoint);
        this._oscServer.Start();
        
        this._logger?.LogInformation($"TCP: {this._oscQuery.TcpPort} UDP/OSC: {portReceive}");
        
        this._listenThread = new(Listen);
        this._listenThread.Start();
    }

    public OSC(string serviceName, Dictionary<string, Type> endpoints, string ipSend = "127.0.0.1", int portSend = 9000,
        int? portReceive = null, ILogger? logger = null)
        : this(serviceName, endpoints.Select(endpoint => new OSCEndpoint(endpoint.Key, endpoint.Value, null)), ipSend,
            portSend, portReceive, logger)
    {
        
    }

    private void Listen()
    {
        while (_keepRunning)
        {
            this._oscServer.Update();
            Thread.Sleep(UpdateInterval);
        }
    }
    
    public AvatarConfig GetAvatarConfig()
    {
        this._logger?.LogInformation("Waiting for Avatar-Config. Try to \"Reset Avatar.\"");
        while (ParameterValues["/avatar/change"] is null)
            Thread.Sleep(10);
        string oscPath = $"{Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData)}Low\\VRChat\\VRChat\\OSC\\";
        DirectoryInfo di = new (oscPath);
        string[] userPaths = di.GetDirectories().Select(dir => Path.Combine(oscPath, dir.Name, "\\Avatars\\"))
            .ToArray();
        string userDir = userPaths.First(path =>
        {
            DirectoryInfo avatarDirInfo = new(path);
            if (avatarDirInfo.GetFiles().Any(file => file.Name.Contains((string)ParameterValues["/avatar/change"]!)))
                return true;
            return false;
        });
        string configPath = Path.Combine(userDir, $"{(string)ParameterValues["/avatar/change"]!}.json");

        string configJson = File.ReadAllText(configPath);
        return JsonSerializer.Deserialize<AvatarConfig>(configJson);
    }

    public event OnParameterChangeEventHandler? OnParameterChangeEvent;

    public delegate void OnParameterChangeEventHandler(string endpoint, object? oldValue, object? newValue);

    internal void AddEndpoint(OSCEndpoint oscEndpoint) =>
        AddEndpoint(oscEndpoint.Endpoint, oscEndpoint.Type, oscEndpoint.Callback);

    internal void AddEndpoint(string endpoint, Type type, Action<string, object?, object?>? callback = null)
    {
        this._logger?.LogDebug($"Adding endpoint {endpoint}");
        Dictionary<Type, string> oscTypeLookup = new Dictionary<Type, string>()
        {
            {typeof(int), "i"},
            {typeof(uint), "u"},
            {typeof(long), "h"},
            {typeof(float), "f"},
            {typeof(double), "d"},
            {typeof(string), "s"},
            {typeof(char), "c"},
            {typeof(Array), "[,]"},
            {typeof(byte[]), "b"},
            {typeof(bool), "T"},
        };
        this._oscQuery.AddEndpoint(endpoint, oscTypeLookup[type], Attributes.AccessValues.WriteOnly);
        this.ParameterValues.Add(endpoint, null);
        this._oscServer.TryAddMethod(endpoint, values => HandleParameterChange(endpoint, type, values, callback));
    }

    private void HandleParameterChange(string endpoint, Type type, OscMessageValues values, Action<string, object?, object?>? callback)
    {
        object? oldValue = ParameterValues[endpoint];
        if (type == typeof(int))
            ParameterValues[endpoint] = values.ReadIntElement(0);
        else if (type == typeof(long))
            ParameterValues[endpoint] = values.ReadInt64Element(0);
        else if (type == typeof(float))
            ParameterValues[endpoint] = values.ReadFloatElement(0);
        else if (type == typeof(double))
            ParameterValues[endpoint] = values.ReadFloat64Element(0);
        else if (type == typeof(string))
            ParameterValues[endpoint] = values.ReadStringElement(0);
        else if (type == typeof(char))
            ParameterValues[endpoint] = values.ReadAsciiCharElement(0);
        else if (type == typeof(bool))
            ParameterValues[endpoint] = values.ReadBooleanElement(0);
        OnParameterChangeEvent?.Invoke(endpoint, oldValue, ParameterValues[endpoint]);
        callback?.Invoke(endpoint, oldValue, ParameterValues[endpoint]);
        this._logger?.LogDebug($"{endpoint} {oldValue} -> {ParameterValues[endpoint]}");
    }

    public void Dispose()
    {
        this._logger?.LogDebug("Disposing");
        _keepRunning = false;
        _oscQuery.Dispose();
        _oscServer.Dispose();
    }
}