/**
  * @RDE_HEADER@
  * Main entry for thp viewer
  * $Id$
  * $HeadURL$
  * $Author$
  */
#include <nglapplication/nglsingleapplication.h>
#include <QUrl>
#include <QDir>
#include <QMessageBox>
#include <QNetworkProxy>
#include <QSplashScreen>
#include <LtsCommandLineParser/LtsCommandLineParser.h>

#include "thp_viewer.h"
#include <NGLLogger/INGLLogger.h>
#include <ngltranslator/ngltranslator.h>

#ifdef Q_OS_WIN
# include <windows.h>
#endif

class CmdLineParser : public LtsCommandLineParser::LtsCommandLineParser
{
public:
  CmdLineParser()
    : LtsCommandLineParser(ProvideCommandLineParameterOptions::None)
  {
    addOption({{QStringLiteral("l"), QStringLiteral("lang")},
               QStringLiteral("Language iso code to use (de_DE, en_GB, en_US)"),
               QStringLiteral("<locale iso code>")
              });
    addOption({{QStringLiteral("t"), QStringLiteral("alwaysontop")},
           QStringLiteral("Set as always on top window")
      });
  }
  bool useAsAlwaysOnTop() const
  {
    return isSet(QStringLiteral("t"));
  }
  QString langIsoCode() const { return value(QStringLiteral("l")); }
};

int main(int argc, char **argv)
{
  QNetworkProxy::setApplicationProxy(QNetworkProxy());

  NGLSingleApplication app(argc, argv);
  app.createLogger("THP", "log4cxx_thp_viewer.props");
  app.setOrganizationName(QStringLiteral("RME"));
  app.setApplicationName(QStringLiteral("thp_viewer"));
  app.setAttribute(Qt::AA_UseHighDpiPixmaps);

  QDir::setSearchPaths(QLatin1String("icon"), QStringList(QLatin1String(":/style/")));
  Q_INIT_RESOURCE(rme_light_style);

  // Parse Options
  CmdLineParser options;
  if (!options.init())
    return -1;
  
  // Set Translation
  QString langIsoCode = options.langIsoCode();
  if (langIsoCode.isEmpty())
    langIsoCode = QLocale::system().name();
  NGL::setTranslationLocale(langIsoCode.toLatin1());

  //check for optional alyways on top flag
  bool alwaysOnTop = options.useAsAlwaysOnTop();
  
  QString index;
  const QStringList args = options.positionalArguments();

//  QString searchDir = QCoreApplication::applicationDirPath();
  QString searchDir(QDir::currentPath());

  if (args.count() == 1)
  {
    QFileInfo fi(args.first());
    if (fi.isDir())
      searchDir = fi.absolutePath();
    else
      index = fi.absoluteFilePath();
  }

  if (index.isEmpty())
  {
    const auto indexFiles = { QStringLiteral("index_%1.html").arg(langIsoCode),
                              QStringLiteral("index.html") };
    for (const QString &indexFile : indexFiles)
    {
      QDir d(searchDir);
      index = d.absoluteFilePath(indexFile);
      while (!d.exists(index))
      {
        if (!d.cdUp())
          break;
        index = d.absoluteFilePath(indexFile);
      }
      if (d.exists(index))
        break;
    }
  }

  QFileInfo fi(index);
  QString basePath = fi.path() + QLatin1Char('/');
  if (!fi.exists() || !fi.isFile())
  {
    fprintf(stderr, "%s <path_to_html> basePath=%s\n", argv[0], basePath.toStdString().c_str());
    QMessageBox::critical(nullptr,
                          QObject::tr("File missing"),
                          QObject::tr("Could not find a valid index.html - aborting"));
    return -1;
  }
  index = fi.absoluteFilePath();

  if (app.sendMessage(index))
    return 0;

  int ret = 1;
  {
    QString splashfile = basePath;
    static const auto extension = {QStringLiteral("gif"),
                                   QStringLiteral("jpg"),
                                   QStringLiteral("png")};
    for (const auto &ext : extension)
    {
      const QString fn = splashfile + QStringLiteral("/wappen.") + ext;
      if (!QFile::exists(fn))
        continue;
      splashfile = fn;
      break;
    }

    const QPixmap splashPixmap(splashfile);
    QSplashScreen splash((splashPixmap));
    if (!splashPixmap.isNull())
      splash.show();

#ifdef BUILD_STATIC_LIBRARIES
    Q_INIT_RESOURCE(libsymbol);
    Q_INIT_RESOURCE(nglresources);
#endif

    NGL::ThpViewer view(QUrl::fromLocalFile(index));
    if (alwaysOnTop)
    {
      view.setWindowFlag(Qt::WindowStaysOnTopHint, true);
      view.setWindowFlag(Qt::WindowMinimizeButtonHint, false);
    }
   
    if (!view.init())
      return ret;
    view.center();

    QObject::connect(&app, &NGLSingleApplication::messageReceived,
                     &view, &NGL::ThpViewer::onNewThp);
    view.show();
    splash.finish(&view);

    ret = app.exec();
  }

  return ret;
}