/*
 * Cppcheck - A tool for static C/C++ code analysis
 * Copyright (C) 2007-2020 Cppcheck team.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include <QApplication>
#include <QCoreApplication>
#include <QTextCodec>
#include <QMetaType>
#include <QStringList>
#include <QSettings>
#ifdef _WIN32
#include <QMessageBox>
#include "aboutdialog.h"
#else
#include <iostream>
#endif
#include "cppcheck.h"
#include "common.h"
#include "mainwindow.h"
#include "erroritem.h"
#include "translationhandler.h"


static void ShowUsage();
static void ShowVersion();
static bool CheckArgs(const QStringList &args);

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

#if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))
 QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
 QApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
#endif

 QApplication app(argc, argv);

#if QT_VERSION < 0x050000
 // Set codecs so that UTF-8 strings in sources are handled correctly.
 // This is ONLY needed for Qt versions 4.x.
 // Qt 5.x assumes UTF-8 by default.
 QTextCodec::setCodecForTr(QTextCodec::codecForName("UTF-8"));
 QTextCodec::setCodecForCStrings(QTextCodec::codecForName("UTF-8"));
#endif

 QCoreApplication::setOrganizationName("Cppcheck");
 QCoreApplication::setApplicationName("Cppcheck-GUI");

 QSettings* settings = new QSettings("Cppcheck", "Cppcheck-GUI", &app);

 // Set data dir..
 foreach (const QString arg, app.arguments()) {
 if (arg.startsWith("--data-dir=")) {
 settings->setValue("DATADIR", arg.mid(11));
 return 0;
 }
 }

 TranslationHandler* th = new TranslationHandler(&app);
 th->setLanguage(settings->value(SETTINGS_LANGUAGE, th->suggestLanguage()).toString());

 if (!CheckArgs(app.arguments()))
 return 0;

 app.setWindowIcon(QIcon(":cppcheck-gui.png"));

 // Register this metatype that is used to transfer error info
 qRegisterMetaType<ErrorItem>("ErrorItem");

 MainWindow window(th, settings);
 window.show();
 return app.exec();
}

// Check only arguments needing action before GUI is shown.
// Rest of the arguments are handled in MainWindow::HandleCLIParams()
static bool CheckArgs(const QStringList &args)
{
 if (args.contains("-h") || args.contains("--help")) {
 ShowUsage();
 return false;
 }
 if (args.contains("-v") || args.contains("--version")) {
 ShowVersion();
 return false;
 }
 return true;
}

static void ShowUsage()
{
 QString helpMessage = MainWindow::tr(
 "Cppcheck GUI.\n\n"
 "Syntax:\n"
 " cppcheck-gui [OPTIONS] [files or paths]\n\n"
 "Options:\n"
 " -h, --help Print this help\n"
 " -p <file> Open given project file and start checking it\n"
 " -l <file> Open given results xml file\n"
 " -d <directory> Specify the directory that was checked to generate the results xml specified with -l\n"
 " -v, --version Show program version\n"
 " --data-dir=<directory> This option is for installation scripts so they can configure the directory where\n"
 " datafiles are located (translations, cfg). The GUI is not started when this option\n"
 " is used.");
#if defined(_WIN32)
 QMessageBox msgBox(QMessageBox::Information,
 MainWindow::tr("Cppcheck GUI - Command line parameters"),
 helpMessage,
 QMessageBox::Ok
 );
 (void)msgBox.exec();
#else
 std::cout << helpMessage.toStdString() << std::endl;
#endif
}

static void ShowVersion()
{
#if defined(_WIN32)
 AboutDialog *dlg = new AboutDialog(CppCheck::version(), CppCheck::extraVersion(), 0);
 dlg->exec();
 delete dlg;
#else
 std::string versionMessage("Cppcheck ");
 versionMessage += CppCheck::version();
 const char * extraVersion = CppCheck::extraVersion();
 if (*extraVersion != 0)
 versionMessage += std::string(" (") + extraVersion + ")";

 std::cout << versionMessage << std::endl;
#endif
}