using DiscordBotCore;
using DiscordBotCore.Logging;
using DiscordBotCore.Others;

namespace CppCompatibilityModule;

public class ExternalApplicationHandler 
{
    private readonly ILogger _Logger;
    private ExternalApplicationManager? _ExternalApplicationManager;
    
    public ExternalApplicationHandler(ILogger logger)
    {
        _Logger = logger;
        _ExternalApplicationManager = new ExternalApplicationManager(logger);
    }

    public Guid CreateApplication(string dllFilePath)
    {

        if (_ExternalApplicationManager is null)
        {
            _Logger.Log("Failed to create application because the manager is not initialized. This should have never happened in the first place !!!", this, LogType.Critical);
            return Guid.Empty;
        }

        if (_ExternalApplicationManager.TryCreateApplication(dllFilePath, out Guid appId))
        {
            return appId;
        }

        return Guid.Empty;
    }

    public void StopApplication(Guid applicationId)
    {
        if (_ExternalApplicationManager is null)
        {
            _Logger.Log("Failed to stop application because the manager is not initialized. This should have never happened in the first place!!!", this, LogType.Critical);
            return;
        }

        _ExternalApplicationManager.FreeApplication(applicationId);
    }

    public T GetFunctionDelegate<T>(Guid applicationId, string functionName) where T : Delegate
    {
        if (_ExternalApplicationManager is null)
        {
            _Logger.Log("Failed to get function delegate because the manager is not initialized. This should have never happened in the first place!!!", this, LogType.Critical);
            return default!;
        }
        
        return _ExternalApplicationManager.GetFunctionDelegate<T>(applicationId, functionName);
    }

    public object? SetExternFunctionToPointToFunction<TLocalFunctionDelegate>(Guid applicationId, string functionName,
        TLocalFunctionDelegate localFunction) where TLocalFunctionDelegate : Delegate
    {
        if(_ExternalApplicationManager is null)
        {
            _Logger.Log("Failed to set external function pointer because the manager is not initialized. This should have never happened in the first place!!!", this, LogType.Critical);
            return null;
        }
        
        return _ExternalApplicationManager.SetExternFunctionToPointToFunction(applicationId, functionName, localFunction);
    }
}