#include <LtsAppDescriptor/lts_app_descriptor.h>

#include <QCoreApplication>
#include <QFile>
#include <QFileInfoList>
#include <QDirIterator>
#include <QTextStream>
#include <QRegularExpression>
#include <QRegularExpressionMatch>

#include <cstdio>


int main(int argc, char *argv[])
{
  QCoreApplication a(argc, argv);

  const QStringList args(a.arguments());

  if (args.count() != 3)
  {
    printf("usage: %s <current source directory> <apps.json>\n", args.at(0).toStdString().c_str());
    return -1;
  }

  const QString currentSrcDir(a.arguments().at(1));

  const QString appsJsonFilePath(QStringLiteral("%1/%2").arg(currentSrcDir, a.arguments().at(2)));
  QFile f(appsJsonFilePath);

  if (!f.open(QFile::ReadOnly))
  {
    printf("LtsAppDescriptorChecker: cannot open apps.json at %s: %s\n", appsJsonFilePath.toStdString().c_str(), f.errorString().toStdString().c_str());
    return -2;
  }

  printf("LtsAppDescriptorChecker: checking %s\n", appsJsonFilePath.toStdString().c_str());

  QStringList lastErrors;
  QStringList dummy1;
  QString dummy2;
  LtsAppDescriptor::AppDescriptionVector adv = LtsAppDescriptor::LtsAppDescriptor::getAppDescriptionVector(f.readAll(), lastErrors, dummy1, dummy2);

  if (!lastErrors.isEmpty())
  {
    printf("LtsAppDescriptorChecker: apps.json at %s invalid:\n%s\n", appsJsonFilePath.toStdString().c_str(), lastErrors.join(QStringLiteral("\r\n\r\n")).toStdString().c_str());
    return 1;
  }


  
  QFileInfoList guiPluginFiles;
  QDirIterator it(QStringLiteral("%1/../../Plugins/").arg(currentSrcDir), QDirIterator::Subdirectories);

  while (it.hasNext())
  {
    QString filename(it.next());
    QFileInfo file(filename);

    if (file.isDir())
        continue;

    if (file.fileName().endsWith(QStringLiteral("_gui_plugin.h"), Qt::CaseInsensitive))
      guiPluginFiles.append(file);
  }

  QStringList filenames;
  filenames.reserve(guiPluginFiles.size());
  for (const QFileInfo &fi : qAsConst(guiPluginFiles))
  {
    filenames += fi.absoluteFilePath();
  }


  QStringList guiPluginIIDs;
  for (const QFileInfo &fi : qAsConst(guiPluginFiles))
  {
    QFile f2(fi.absoluteFilePath());

    if (!f2.open(QFile::ReadOnly))
      continue;

    QTextStream ts(&f2);
    while (!ts.atEnd())
    {
      QString line(ts.readLine().trimmed().simplified());
      static QString iidIdentifier(QStringLiteral("Q_PLUGIN_METADATA"));

      if (line.contains(iidIdentifier))
      {
        QRegularExpression re(QStringLiteral("(?<=gui:3:).*(?=\"\\))"));
        QRegularExpressionMatch match = re.match(line);
        if (match.hasMatch())
        {
          QString matched = match.captured(0);
          
          guiPluginIIDs += matched;
        }
        break;
      }
    }
  }


  
  bool ok = true;

  for (const LtsAppDescriptor::AppDescription &appdesc : qAsConst(adv))
  {
    for (const LtsAppDescriptor::PluginInfo &pi : qAsConst(appdesc.pluginInfos))
    {
      if (!guiPluginIIDs.contains(pi.iid))
      {
        printf("LtsAppDescriptorChecker: apps.json at '%s' uses unknown IID '%s'\n", appsJsonFilePath.toStdString().c_str(), pi.iid.toStdString().c_str());
        ok = false;
      }
    }
  }

  

  return !ok;
}