/*
 * Copyright (C) by Duncan Mac-Vicar P. <duncan@kde.org>
 *
 * 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 2 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.
 */

#include <QtCore>
#include <QtGui>

#include "mirall/constants.h"
#include "mirall/application.h"
#include "mirall/folder.h"
#include "mirall/folderwatcher.h"
#include "mirall/folderwizard.h"
#include "mirall/networklocation.h"
#include "mirall/unisonfolder.h"
#include "mirall/sitecopyfolder.h"
#include "mirall/sitecopyconfig.h"
#include "mirall/statusdialog.h"
#include "mirall/owncloudsetup.h"

#ifdef WITH_CSYNC
#include "mirall/csyncfolder.h"
#endif
#include "mirall/inotify.h"

namespace Mirall {

Application::Application(int argc, char **argv) :
    QApplication(argc, argv),
    _networkMgr(new QNetworkConfigurationManager(this)),
    _folderSyncCount(0),
    _contextMenu(0)
{
    INotify::initialize();

    setApplicationName("Mirall");
    setQuitOnLastWindowClosed(false);

    _folderWizard = new FolderWizard();
    _owncloudSetup = new OwncloudSetup();
    _statusDialog = new StatusDialog();
    _folderConfigPath = QDesktopServices::storageLocation(QDesktopServices::DataLocation) + "/folders";

    connect( _statusDialog, SIGNAL(removeFolderAlias( const QString&)),
             SLOT(slotRemoveFolder(const QString&)));

    setupActions();
    setupSystemTray();

    qDebug() << "* Network is" << (_networkMgr->isOnline() ? "online" : "offline");
    foreach (QNetworkConfiguration netCfg, _networkMgr->allConfigurations(QNetworkConfiguration::Active)) {
        //qDebug() << "Network:" << netCfg.identifier();
    }

    // if QDir::mkpath would not be so stupid, I would not need to have this
    // duplication of folderConfigPath() here
    QDir storageDir(QDesktopServices::storageLocation(QDesktopServices::DataLocation));
    storageDir.mkpath("folders");

    // Look for configuration changes
    _configFolderWatcher = new FolderWatcher(storageDir.path());
    connect(_configFolderWatcher, SIGNAL(folderChanged(const QStringList &)),
            this, SLOT(slotReparseConfiguration()));

    setupKnownFolders();
    setupContextMenu();

    qDebug() << NetworkLocation::currentLocation().encoded();
}

Application::~Application()
{
    qDebug() << "* Mirall shutdown";
    INotify::cleanup();

    delete _networkMgr;
    delete _tray;

    foreach (Folder *folder, _folderMap) {
        delete folder;
    }
}

QString Application::folderConfigPath() const
{
    return _folderConfigPath;
}

void Application::setupActions()
{
    _actionAddFolder = new QAction(tr("Add folder"), this);
    QObject::connect(_actionAddFolder, SIGNAL(triggered(bool)), SLOT(slotAddFolder()));
    _actionQuit = new QAction(tr("Quit"), this);
    QObject::connect(_actionQuit, SIGNAL(triggered(bool)), SLOT(quit()));
}

void Application::setupSystemTray()
{
    _tray = new QSystemTrayIcon(this);
    _tray->setIcon(QIcon::fromTheme(FOLDER_ICON_EMPTY));

    connect(_tray,SIGNAL(activated(QSystemTrayIcon::ActivationReason)),
            SLOT(slotTrayClicked(QSystemTrayIcon::ActivationReason)));

    _tray->show();
}

void Application::slotTrayClicked( QSystemTrayIcon::ActivationReason reason )
{
  if( reason == QSystemTrayIcon::Trigger ) {
    // check if there is a mirall.cfg already.
    QFile fi( QDesktopServices::storageLocation(QDesktopServices::DataLocation) + "/mirall.cfg" );
    if( !fi.exists() ) {
      qDebug() << "No configured folders yet, start the Owncloud integration dialog.";
      _owncloudSetup->startWizard();
    } else {
      _statusDialog->setFolderList( _folderMap );
      _statusDialog->exec();
    }
  }
}

void Application::setupContextMenu()
{
    delete _contextMenu;
    _contextMenu = new QMenu();
    _contextMenu->addAction(_actionAddFolder);

    // here all folders should be added
    foreach (Folder *folder, _folderMap) {
        _contextMenu->addAction(folder->openAction());
    }

    _contextMenu->addSeparator();

    _contextMenu->addAction(_actionQuit);
    _tray->setContextMenu(_contextMenu);
}

void Application::slotReparseConfiguration()
{
    setupKnownFolders();
    setupContextMenu();
}

void Application::slotAddFolder()
{
  _folderWizard->setFolderMap( &_folderMap );

  if (_folderWizard->exec() == QDialog::Accepted) {
    qDebug() << "* Folder wizard completed";

    QString alias = _folderWizard->field("alias").toString();

    QSettings settings(folderConfigPath() + "/" + alias, QSettings::IniFormat);
    settings.setValue("folder/backend", "csync");
    settings.setValue("folder/path", _folderWizard->field("sourceFolder"));

    if (_folderWizard->field("local?").toBool()) {
      settings.setValue("backend:csync/secondPath", _folderWizard->field("targetLocalFolder"));
    } else if (_folderWizard->field("remote?").toBool()) {
      settings.setValue("backend:csync/secondPath", _folderWizard->field("targetURLFolder"));
      bool onlyOnline = _folderWizard->field("onlyOnline?").toBool();
      settings.setValue("folder/onlyOnline", onlyOnline);

      if (onlyOnline) {
        bool onlyThisLAN = _folderWizard->field("onlyThisLAN?").toBool();
        settings.setValue("folder/onlyThisLAN", onlyThisLAN);
        if (onlyThisLAN) {
          settings.setValue("folder/onlyOnline", true);
        }
      }
    } else if( _folderWizard->field("OC?").toBool()) {
      settings.setValue("folder/backend", "sitecopy");
      settings.setValue("backend:sitecopy/targetPath", _folderWizard->field("targetOCFolder"));
      settings.setValue("backend:sitecopy/alias",  _folderWizard->field("OCSiteAlias"));

      qDebug() << "Now writing sitecopy config " << _folderWizard->field("OCSiteAlias").toString(); ;
      SitecopyConfig scConfig;

      scConfig.writeSiteConfig( alias,
                                _folderWizard->field("sourceFolder").toString(), /* local path */
                                _folderWizard->field("targetOCFolder").toString() );
    } else {
      qWarning() << "* Folder not local and note remote?";
      return;
    }

    settings.sync();
    setupFolderFromConfigFile(alias);
    setupContextMenu();
  }
  else
    qDebug() << "* Folder wizard cancelled";
}

void Application::slotRemoveFolder( const QString& alias )
{
  QString configFile = folderConfigPath() + "/" + alias;
  QFile file( configFile );

  int ret = QMessageBox::question( 0, tr("Confirm Folder Remove"), tr("Do you really want to remove upload folder <i>%1</i>?").arg(alias),
                                    QMessageBox::Yes|QMessageBox::No );

  if( ret == QMessageBox::No ) {
    return;
  }

  if( _folderMap.contains( alias )) {
    Folder *f = _folderMap.take( alias );
    delete f;
  }

  if( file.exists() ) {
    qDebug() << "Remove folder config file " << configFile;
    file.remove();
  }

  SitecopyConfig scConfig;
  if( ! scConfig.removeFolderConfig( alias ) ) {
    qDebug() << "Failed to remove folder config for " << alias;
  } else {
    setupKnownFolders();
    _statusDialog->setFolderList( _folderMap );
  }
}

void Application::setupKnownFolders()
{
  qDebug() << "* Setup folders from " << folderConfigPath();

  _folderMap.clear();
  QDir dir(folderConfigPath());
  dir.setFilter(QDir::Files);
  QStringList list = dir.entryList();
  foreach (QString file, list) {
    setupFolderFromConfigFile(file);
  }
  if( list.size() ) _tray->setIcon(QIcon::fromTheme(FOLDER_ICON));
}

// filename is the name of the file only, it does not include
// the configuration directory path
void Application::setupFolderFromConfigFile(const QString &file) {
    Folder *folder = 0L;

    qDebug() << "  ` -> setting up:" << file;
    QSettings settings(folderConfigPath() + "/" + file, QSettings::IniFormat);
    qDebug() << "    -> file path: " + settings.fileName();

    if (!settings.contains("folder/path")) {
        qWarning() << "   `->" << file << "is not a valid folder configuration";
        return;
    }

    QVariant path = settings.value("folder/path").toString();
    if (path.isNull() || !QFileInfo(path.toString()).isDir()) {
        qWarning() << "    `->" << path.toString() << "does not exist. Skipping folder" << file;
        _tray->showMessage(tr("Unknown folder"),
                           tr("Folder %1 does not exist").arg(path.toString()),
                           QSystemTrayIcon::Critical);
        return;
    }

    QVariant backend = settings.value("folder/backend");
    if (!backend.isNull()) {
        if( backend.toString() == "sitecopy") {

            SiteCopyFolder *scf = new SiteCopyFolder( file,
                                                      path.toString(),
                                                      QString(),
                                                      this);
            folder = scf;

        }
        else if (backend.toString() == "unison") {
            folder = new UnisonFolder(file,
                                      path.toString(),
                                      settings.value("backend:unison/secondPath").toString(),
                                      this);
        }
        else if (backend.toString() == "csync") {
#ifdef WITH_CSYNC
            folder = new CSyncFolder(file,
                                     path.toString(),
                                     settings.value("backend:csync/secondPath").toString(),
                                     this);
#else
            qCritical() << "* csync suport not enabled!! ignoring:" << file;
#endif
        }
        else {
            qWarning() << "unknown backend" << backend;
            return;
        }
    }
    folder->setOnlyOnlineEnabled(settings.value("folder/onlyOnline", false).toBool());
    folder->setOnlyThisLANEnabled(settings.value("folder/onlyThisLAN", false).toBool());

    _folderMap[file] = folder;
    QObject::connect(folder, SIGNAL(syncStarted()), SLOT(slotFolderSyncStarted()));
    QObject::connect(folder, SIGNAL(syncFinished(const SyncResult &)), SLOT(slotFolderSyncFinished(const SyncResult &)));
}

void Application::slotFolderSyncStarted()
{
    _folderSyncCount++;

    if (_folderSyncCount > 0) {
        _tray->setIcon(QIcon::fromTheme(FOLDER_SYNC_ICON));
    }
}

void Application::slotFolderSyncFinished(const SyncResult &result)
{
    _folderSyncCount--;

    Folder *folder = dynamic_cast<Folder *>(sender());

    if (_folderSyncCount < 1) {
        if (result.result() == SyncResult::Success) {
            _tray->setIcon(QIcon::fromTheme(FOLDER_ICON));
            //_tray->showMessage(tr("Folder %1").arg(folder->alias()),
            //                   tr("Synchronization successfull"),
            //                   QSystemTrayIcon::Information);
        }
        else {
            _tray->setIcon(QIcon::fromTheme(FOLDER_SYNC_ERROR));
            _tray->showMessage(tr("Folder %1").arg(folder->alias()),
                               result.errorString(),
                               /* tr("Synchronization did not finish successfully"), */
                               QSystemTrayIcon::Warning);
        }

    }
    if( _statusDialog->isVisible() ) {
      _statusDialog->setFolderList( _folderMap );
    }
}


} // namespace Mirall

#include "application.moc"