/*
  Q Light Controller - Fixture Definition Editor
  main.cpp

  Copyright (C) Heikki Junnila

  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0.txt

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
*/

#include <QApplication>
#include <QTextStream>
#include <QTranslator>
#include <QLocale>
#include <QString>
#include <QDebug>
#include <QDir>

#include "qlcconfig.h"
#include "qlcfile.h"
#include "app.h"

/* Use this namespace for command-line arguments so that we don't pollute
   the global namespace. */
namespace FXEDArgs
{
/**
 * Specifies a fixture file name to load after all initialization
 * has been done
 */
QString fixture;

/**
 * Specifies a locale for forced translation
 */
QString locale;
}

#if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
#define endl Qt::endl
#endif

/**
 * Prints the application version
 */
void printVersion()
{
    QTextStream cout(stdout, QIODevice::WriteOnly);

    cout << endl;
    cout << App::longName() << " " << App::version() << endl;
    cout << "This program is licensed under the terms of the ";
    cout << "Apache 2.0 license." << endl;
    cout << "Copyright (c) Heikki Junnila (hjunnila@users.sf.net)." << endl;
    cout << "Copyright (c) Massimo Callegari (massimocallegari@yahoo.it)." << endl;
    cout << endl;
}

/**
 * Prints possible command-line options
 */
void printUsage()
{
    QTextStream cout(stdout, QIODevice::WriteOnly);

    cout << "Usage:";
    cout << "  qlcplus-fixtureeditor [options]" << endl;
    cout << "Options:" << endl;
    cout << "  -o or --open <file>\t\tOpen the specified fixture definition file" << endl;
    cout << "  -l or --locale <locale>\tForce a locale for translation" << endl;
    cout << "  -h or --help\t\t\tPrint this help" << endl;
    cout << "  -v or --version\t\tPrint version information" << endl;
    cout << endl;
}

/**
 * Parse command line arguments
 *
 * @param argc Number of arguments in array argv
 * @param argv Arguments array
 *
 * @return true to continue with application launch; otherwise false
 */
bool parseArgs()
{
    QStringListIterator it(QCoreApplication::arguments());
    while (it.hasNext() == true)
    {
        QString arg(it.next());

        if (arg == "-v" || arg == "--version")
        {
            /* Don't print anything, since version is always
               printed before anything else. Just make the app
               exit by returning false. */
            return false;
        }
        else if (arg == "-h" || arg == "--help")
        {
            printUsage();
            return false;
        }
        else if (arg == "-o" || arg == "--open")
        {
            if (it.hasNext() == true)
                FXEDArgs::fixture = it.next();
        }
        else if (arg == "-l" || arg == "--locale")
        {
            if (it.hasNext() == true)
                FXEDArgs::locale = it.next();
        }
    }

    return true;
}

void loadTranslation(const QString& locale, QApplication& app)
{
    QString lc;
    if (FXEDArgs::locale.isEmpty() == true)
        lc = locale;
    else
        lc = FXEDArgs::locale;
    QString file(QString("qlcplus_%1").arg(lc));

    QString path = QLCFile::systemDirectory(TRANSLATIONDIR).path();
    QTranslator* translator = new QTranslator(&app);
    if (translator->load(file, path) == true)
    {
        qDebug() << "Using translation for" << lc;
        QCoreApplication::installTranslator(translator);
    }
    else
    {
        qDebug() << "Unable to find translation for" << lc;
    }
}

/**
 * THE entry point for the application
 *
 * @param argc Number of arguments in array argv
 * @param argv Arguments array
 */
int main(int argc, char** argv)
{
    /* Create the Qt core application object */
    QApplication qapp(argc, argv);

#if defined(__APPLE__) || defined(Q_OS_MAC)
    /* Load plugins from within the bundle ONLY */
    QDir dir(QApplication::applicationDirPath());
    dir.cdUp();
    dir.cd("plugins");
    QApplication::setLibraryPaths(QStringList(dir.absolutePath()));
#endif

    /* Let te world know... */
    printVersion();

    /* Parse command-line arguments */
    if (parseArgs() == false)
        return 0;

    /* Load translation for current locale */
    loadTranslation(QLocale::system().name(), qapp);

    /* Create and initialize the Fixture Editor application object */
    App app;
    if (FXEDArgs::fixture.isEmpty() == false)
        app.loadFixtureDefinition(FXEDArgs::fixture);

    /* Show and execute the application */
    app.show();
    return qapp.exec();
}
