#ifdef WINDOWS
    #define ClientName      "client.exe"
   	#define PathSlash		"\\"
#else
    #define ClientName      "client"
   	#define PathSlash		"/"
#endif
#include <QFileInfo>
#include <QProcess>
#include <QString>
#include <string>
#include "Logger.h"

using std::string;


int main(int argc, char* argv[])
{
    Logger::Info("Starting updater application\n");

    string path = argv[0];
	size_t p = path.find_last_of(PathSlash);
	QString dir = QString::fromStdString(path.substr(0, p));
	Logger::Trace("Application path: %s\n", dir.toStdString().c_str());

    // check if whether client.bin.latest exists
    // it shoultd be renamed to client.exe (on Windows) ot just client (on Linux)
    QFileInfo binInfo(dir + PathSlash +"client.bin.latest");
    if (! binInfo.exists())
    {
	    Logger::Fatal("New client version not present.\n");
	    Logger::Fatal("Terminating.\n");
	    return -1;
    }

    // remove old client binary
    QFile client(dir + PathSlash + ClientName);
    if (client.exists())
    {
        Logger::Trace("Removing old client executable\n");
        if (! client.remove())
        {
            Logger::Fatal("Can't remove %s\n", client.fileName().toStdString().c_str());
            return -1;
        }
    }
    else
    {
        Logger::Warn("Client executable is absent\n");
    }

    if (QFile::rename(dir + PathSlash + "client.bin.latest", dir + PathSlash + ClientName))
    {
        Logger::Info("Client successfully updated\n");
    }
    else
    {
        Logger::Fatal("Can't rename 'client.bin.latest'\n");
        return -1;
    }

    // starting client process
    QString program(dir + PathSlash + ClientName);
    if (! QProcess::startDetached(program))
    {
        Logger::Fatal("Failed to start client application\n");
        return -1;
    }

    return 0;
}