// This file is part of RSS Guard.
//
// Copyright (C) 2011-2016 by Martin Rotter <rotter.martinos@gmail.com>
//
// RSS Guard 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.
//
// RSS Guard 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 RSS Guard. If not, see <http://www.gnu.org/licenses/>.

#include "gui/dialogs/formabout.h"

#include "miscellaneous/iconfactory.h"
#include "miscellaneous/textfactory.h"
#include "miscellaneous/settingsproperties.h"

#include <QFile>
#include <QTextStream>


FormAbout::FormAbout(QWidget *parent) : QDialog(parent), m_ui(new Ui::FormAbout()) {
  m_ui->setupUi(this);

  // Set flags and attributes.
  setWindowFlags(Qt::MSWindowsFixedSizeDialogHint | Qt::Dialog | Qt::WindowSystemMenuHint);
  setWindowIcon(qApp->icons()->fromTheme(QSL("help-about")));

  //: About RSS Guard dialog title.
  setWindowTitle(tr("About %1").arg(APP_NAME));

  m_ui->m_lblIcon->setPixmap(QPixmap(APP_ICON_PATH));

  // Load information from embedded text files.
  loadLicenseAndInformation();

  // Load additional paths information.
  loadSettingsAndPaths();
}

FormAbout::~FormAbout() {
  qDebug("Destroying FormAbout instance.");
}

void FormAbout::loadSettingsAndPaths() {
  if (qApp->settings()->type() == SettingsProperties::Portable) {
    m_ui->m_txtPathsSettingsType->setText(tr("FULLY portable"));
    m_ui->m_txtPathsDatabaseRoot->setText(QDir::toNativeSeparators(qApp->applicationDirPath() +
                                                                   QDir::separator() +
                                                                   QString(APP_DB_SQLITE_PATH)));
  }
  else {
    m_ui->m_txtPathsSettingsType->setText(tr("PARTIALLY portable"));
    m_ui->m_txtPathsDatabaseRoot->setText(QDir::toNativeSeparators(qApp->homeFolderPath() +
                                                                   QDir::separator() +
                                                                   QString(APP_LOW_H_NAME) +
                                                                   QDir::separator() +
                                                                   QString(APP_DB_SQLITE_PATH)));
  }

  m_ui->m_txtPathsSettingsFile->setText(QDir::toNativeSeparators(qApp->settings()->fileName()));
}

void FormAbout::loadLicenseAndInformation() {
  QFile file;

  file.setFileName(APP_INFO_PATH + QL1S("/COPYING_GNU_GPL_HTML"));
  if (file.open(QIODevice::ReadOnly | QIODevice::Text)) {
    m_ui->m_txtLicenseGnu->setText(QString::fromUtf8(file.readAll()));
  }
  else {
    m_ui->m_txtLicenseGnu->setText(tr("License not found."));
  }
  file.close();

  file.setFileName(APP_INFO_PATH + QL1S("/COPYING_BSD"));
  if (file.open(QIODevice::ReadOnly | QIODevice::Text)) {
    m_ui->m_txtLicenseBsd->setText(QString::fromUtf8(file.readAll()));
  }
  else {
    m_ui->m_txtLicenseBsd->setText(tr("License not found."));
  }
  file.close();

  file.setFileName(APP_INFO_PATH + QL1S("/CHANGELOG"));
  if (file.open(QIODevice::ReadOnly | QIODevice::Text)) {
    m_ui->m_txtChangelog->setText(QString::fromUtf8(file.readAll()));
  }
  else {
    m_ui->m_txtChangelog->setText(tr("Changelog not found."));
  }
  file.close();

  // Set other informative texts.
  m_ui->m_lblDesc->setText(tr("<b>%8</b><br>"
                              "<b>Version:</b> %1 (built on %2/%3)<br>"
                              "<b>Revision:</b> %4<br>"
                              "<b>Build date:</b> %5<br>"
                              "<b>Qt:</b> %6 (compiled against %7)<br>").arg(qApp->applicationVersion(),
                                                                             APP_SYSTEM_NAME,
                                                                             APP_SYSTEM_VERSION,
                                                                             STRFY(APP_REVISION),
                                                                             TextFactory::parseDateTime(QString("%1 %2").arg(__DATE__,
                                                                                                                             __TIME__)).toString(Qt::DefaultLocaleShortDate),
                                                                             qVersion(),
                                                                             QT_VERSION_STR,
                                                                             APP_NAME));

  m_ui->m_txtInfo->setText(tr("<body>%5 is a (very) tiny feed reader."
                              "<br><br>This software is distributed under the terms of GNU General Public License, version 3."
                              "<br><br>Contacts:"
                              "<ul><li><a href=\"mailto://%1\">%1</a> ~e-mail</li>"
                              "<li><a href=\"%2\">%2</a> ~website</li></ul>"
                              "You can obtain source code for %5 from its website."
                              "<br><br><br>Copyright (C) 2011-%3 %4</body>").arg(APP_EMAIL,
                                                                                 APP_URL,
                                                                                 QString::number(QDateTime::currentDateTime().date().year()),
                                                                                 APP_AUTHOR,
                                                                                 APP_NAME));
}