/*
Copyright (c) by respective owners including Yahoo!, Microsoft, and
individual contributors. All rights reserved.  Released under a BSD (revised)
license as described in the file LICENSE.
*/

#pragma once

#ifdef _MSC_VER
#define _CRT_SECURE_NO_WARNINGS
#endif

#include "vw.h"
#include "vw_settings.h"

#include <msclr\marshal_cppstd.h>

using namespace System;
using namespace System::Runtime::InteropServices;

namespace VW
{
    /// <summary>
    /// Collected performance statistics.
    /// </summary>
    public ref class VowpalWabbitPerformanceStatistics
    {
    public:
        /// <summary>
        /// The total number of features seen since instance creation.
        /// </summary>
        property uint64_t TotalNumberOfFeatures;

        /// <summary>
        /// The weighted sum of examples.
        /// </summary>
        property double WeightedExampleSum;

        /// <summary>
        ///  The total number of examples per pass.
        /// </summary>
        property uint64_t NumberOfExamplesPerPass;

        /// <summary>
        /// The weighted sum of labels.
        /// </summary>
        property double WeightedLabelSum;

        /// <summary>
        /// The average loss since instance creation.
        /// </summary>
        property double AverageLoss;

        /// <summary>
        /// The best constant since instance creation.
        /// </summary>
        property double BestConstant;

        /// <summary>
        /// The best constant loss since instance creation.
        /// </summary>
        property double BestConstantLoss;
    };

    /// <summary>
    /// A managed wrapper for native vowpal wabbit exceptions.
    /// </summary>
    /// <remarks>
    /// As the default managed exception wrapping any native exception doesn't even capture exception::what()
    /// this wrapper was created.
    /// </remarks>
    [Serializable]
    public ref class VowpalWabbitException : Exception
    {
    private:
        /// <summary>
        /// The source filename in which the wrapped exception occurred.
        /// </summary>
        initonly String^ m_filename;

        /// <summary>
        /// The line number in which the wrapped exception occurred.
        /// </summary>
        initonly Int32 m_lineNumber;

    public:
        /// <summary>
        /// Initializes a new instance of <see cref="VowpalWabbitException"/>.
        /// </summary>
        /// <param name="ex">The native vowpal wabbit exception</param>
        VowpalWabbitException(const vw_exception& ex);

        /// <summary>
        /// Gets the source filename in which the wrapped exception occurred.
        /// </summary>
        property String^ Filename
        {
            String^ get();
        }

        /// <summary>
        /// Gets the line number in which the wrapped exception occurred.
        /// </summary>
        property Int32 LineNumber
        {
            Int32 get();
        }
    };

	/// <summary>
	/// A managed wrapper for native vowpal wabbit exceptions.
	/// </summary>
	/// <remarks>
	/// As the default managed exception wrapping any native exception doesn't even capture exception::what()
	/// this wrapper was created.
	/// </remarks>
	[Serializable]
	public ref class VowpalWabbitArgumentDisagreementException : VowpalWabbitException
	{
	public:
		/// <summary>
		/// Initializes a new instance of <see cref="VowpalWabbitException"/>.
		/// </summary>
		/// <param name="ex">The native vowpal wabbit exception</param>
		VowpalWabbitArgumentDisagreementException(const vw_argument_disagreement_exception& ex);
	};

#ifdef _DEBUG
    [System::ComponentModel::Browsable(false)]
    [System::ComponentModel::EditorBrowsable(System::ComponentModel::EditorBrowsableState::Never)]
    public ref class VowpalWabbitLeakTest abstract sealed
    {
    public:
        static void Leak()
        {
            new float[123];
        }

        static void NoLeak()
        {
          void* ptr = calloc(128, 2);
          ptr = realloc(ptr, 128 * 3);
          free(ptr);
        }
    };
#endif
}

#define CATCHRETHROW \
catch (VW::vw_exception const& ex) \
{ throw gcnew VW::VowpalWabbitException(ex); } \
catch (std::exception const& ex) \
{ throw gcnew System::Exception(gcnew System::String(ex.what())); }