/* Copyright (C) 2013
 * swift Project Community / Contributors
 *
 * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
 * directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
 * including this file, may be copied, modified, propagated, or distributed except according to the terms
 * contained in the LICENSE file.
 */

#ifndef BLACKSIM_XSWIFTBUS_UTILS_H
#define BLACKSIM_XSWIFTBUS_UTILS_H

#include <XPLM/XPLMDefs.h>
#include <XPLM/XPLMPlugin.h>
#include <XPLM/XPLMProcessing.h>
#include <XPLM/XPLMUtilities.h>
#include <vector>
#include <cstring>
#include <cstdio>
#include <cstdlib>
#include <clocale>
#include <string>

/*!
 * \file
 */

/*!
 * Install a Qt message handler which outputs to the X-Plane debug log.
 */
//class QXPlaneMessageHandler
//{
//    static void handler(QtMsgType type, const QMessageLogContext &context, const QString &msg)
//    {
//        QByteArray localMsg = msg.toLocal8Bit();
//        QByteArray file(context.file);
//        if (file.isEmpty()) file = "<unknown>";

//        int line = context.line;

//        char *buffer = new char[64 + localMsg.size() + file.size()];
//        switch (type) {
//        case QtDebugMsg:
//            std::sprintf(buffer, "%s:%d: Debug: %s\n", file.constData(), line, localMsg.constData());
//            XPLMDebugString(buffer);
//            break;
//        case QtInfoMsg:
//            std::sprintf(buffer, "%s:%d: Info: %s\n", file.constData(), line, localMsg.constData());
//            XPLMDebugString(buffer);
//            break;
//        case QtWarningMsg:
//            std::sprintf(buffer, "%s:%d: Warning: %s\n", file.constData(), line, localMsg.constData());
//            XPLMDebugString(buffer);
//            break;
//        default:
//        case QtCriticalMsg:
//            std::sprintf(buffer, "%s:%d: Error: %s\n", file.constData(), line, localMsg.constData());
//            XPLMDebugString(buffer);
//            break;
//        case QtFatalMsg:
//            std::sprintf(buffer, "%s:%d: Fatal: %s\n", file.constData(), line, localMsg.constData());
//            XPLMDebugString(buffer);
//            std::abort();
//        }
//        delete[] buffer;
//    }

//public:
//    /*!
//     * Install the handler.
//     */
//    static void install()
//    {
//        qInstallMessageHandler(handler);
//    }

//    //! Not copyable.
//    //! @{
//    QXPlaneMessageHandler(const QXPlaneMessageHandler &) = delete;
//    QXPlaneMessageHandler &operator =(const QXPlaneMessageHandler &) = delete;
//    //! @}
//};

/*!
 * QApplication subclass used by XSwiftBus.
 *
 * Only one instance of QApplication is allowed per process, so if any other
 * X-Plane plugin, completely unrelated to this pilot client, wants to use the
 * Qt framework, they can simply copy & paste this class into their project
 * and both X-Plane plugins will be able to share a single QApplication safely.
 */
//class QSharedApplication : public QCoreApplication
//{
//    Q_OBJECT

//    QWeakPointer<QCoreApplication> m_weakptr;

//    QSharedApplication(QSharedPointer<QCoreApplication> &ptr, int &argc, char **argv) : QCoreApplication(argc, argv)
//    {
//        ptr.reset(this);
//        m_weakptr = ptr;
//    }

//    static char *strdup(const char *s) { auto s2 = static_cast<char *>(std::malloc(std::strlen(s) + 1)); return std::strcpy(s2, s); }

//public:
//    /*!
//     * Returns a shared pointer to the QApplication.
//     *
//     * The QApplication will not be destroyed while this shared pointer exists.
//     */
//    static QSharedPointer<QCoreApplication> sharedInstance()
//    {
//        QSharedPointer<QCoreApplication> ptr;
//        if (! instance())
//        {
//            static int argc = 1;
//            static char *argv[] = { strdup("X-Plane") };
      
//#ifdef Q_OS_UNIX
//            /* Workaround for #362 */
//            char* xplocale = setlocale(LC_ALL, nullptr);
//#endif
            
//            new QSharedApplication(ptr, argc, argv);
            
//#ifdef Q_OS_UNIX
//            setlocale(LC_ALL, xplocale);
//#endif
//        }
//        if (! instance()->inherits("QSharedApplication"))
//        {
//            qFatal("There is an unshared QCoreApplication in another plugin");
//        }
//        return static_cast<QSharedApplication*>(instance())->m_weakptr;
//    }
//};

///*!
// * Runs the Qt event loop inside the X-Plane event loop.
// */
//class QXPlaneEventLoop : public QObject
//{
//    Q_OBJECT

//    QXPlaneEventLoop(QObject *parent) : QObject(parent)
//    {
//        XPLMRegisterFlightLoopCallback(callback, -1, nullptr);
//    }

//    ~QXPlaneEventLoop()
//    {
//        XPLMUnregisterFlightLoopCallback(callback, nullptr);
//    }

//    static float callback(float, float, int, void *)
//    {
//        QCoreApplication::processEvents();
//        QCoreApplication::sendPostedEvents();
//        return -1;
//    }

//public:
//    /*!
//     * Registers the X-Plane callback which calls into the Qt event loop,
//     * unless one was already registered.
//     */
//    static void exec()
//    {
//        if (! QCoreApplication::instance()->findChild<QXPlaneEventLoop *>())
//        {
//            new QXPlaneEventLoop(QCoreApplication::instance());
//        }
//    }
//};

namespace XSwiftBus
{
    //! Absolute xplane path
    extern std::string g_xplanePath;

    //! Platform specific dir separator
    extern std::string g_sep;

    //! Init global xplane path
    void initXPlanePath();

    //! Returns the directory name of a given file path
    std::string getDirName(const std::string &filePath);

    //! Returns the filename (including extension) of a given file path
    std::string getFileName(const std::string &filePath);

    //! Returns the filename without extension of a given file path
    std::string getBaseName(const std::string &filePath);

    //! Splits the given string maximal maxSplitCount times and returns the tokens
    //! The size of the returned vector is up to maxSplitCount + 1 or less
    std::vector<std::string> split(const std::string &str, size_t maxSplitCount = 0);

    //! Simple logger class.
    //! Don't use it directly, but the _LOG macros instead
    class Logger
    {
    public:
        //! Message type
        enum MsgType { DebugMsg, WarningMsg, FatalMsg, InfoMsg };

        Logger() = delete;

        //! Print message to X-Plane log
        static void print(const std::string &filePath, int line, MsgType type, const std::string &message);
    };

    //! Logger convenience macros
    //! @{
    #define DEBUG_LOG(msg) Logger::print(__FILE__, __LINE__, Logger::DebugMsg, msg)
    #define INFO_LOG(msg) Logger::print(__FILE__, __LINE__, Logger::InfoMsg, msg)
    //! @}
}

#endif // guard