/***************************************************************************
 *   Copyright (C) 2005-2012 by the Quassel Project                        *
 *   devel@quassel-irc.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) version 3.                                           *
 *                                                                         *
 *   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, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/

#include "qtui.h"

#include "abstractnotificationbackend.h"
#include "buffermodel.h"
#include "chatlinemodel.h"
#include "contextmenuactionprovider.h"
#include "mainwin.h"
#include "qtuimessageprocessor.h"
#include "qtuisettings.h"
#include "qtuistyle.h"
#include "systemtray.h"
#include "toolbaractionprovider.h"
#include "types.h"
#include "util.h"

#ifdef Q_WS_X11
#  include <QX11Info>
#endif

QtUi *QtUi::_instance = 0;
MainWin *QtUi::_mainWin = 0;
QList<AbstractNotificationBackend *> QtUi::_notificationBackends;
QList<AbstractNotificationBackend::Notification> QtUi::_notifications;

QtUi::QtUi() : GraphicalUi() {
  if(_instance != 0) {
    qWarning() << "QtUi has been instantiated again!";
    return;
  }
  _instance = this;

  QtUiSettings uiSettings;
  Quassel::loadTranslation(uiSettings.value("Locale", QLocale::system()).value<QLocale>());

  setContextMenuActionProvider(new ContextMenuActionProvider(this));
  setToolBarActionProvider(new ToolBarActionProvider(this));

  setUiStyle(new QtUiStyle(this));
  _mainWin = new MainWin();

  setMainWidget(_mainWin);

  connect(_mainWin, SIGNAL(connectToCore(const QVariantMap &)), this, SIGNAL(connectToCore(const QVariantMap &)));
  connect(_mainWin, SIGNAL(disconnectFromCore()), this, SIGNAL(disconnectFromCore()));
  connect(Client::instance(), SIGNAL(bufferMarkedAsRead(BufferId)), SLOT(closeNotifications(BufferId)));
}

QtUi::~QtUi() {
  unregisterAllNotificationBackends();
  delete _mainWin;
  _mainWin = 0;
  _instance = 0;
}

void QtUi::init() {
  _mainWin->init();
  QtUiSettings uiSettings;
  uiSettings.initAndNotify("UseSystemTrayIcon", this, SLOT(useSystemTrayChanged(QVariant)), true);

  GraphicalUi::init(); // needs to be called after the mainWin is initialized
}

MessageModel *QtUi::createMessageModel(QObject *parent) {
  return new ChatLineModel(parent);
}

AbstractMessageProcessor *QtUi::createMessageProcessor(QObject *parent) {
  return new QtUiMessageProcessor(parent);
}

void QtUi::connectedToCore() {
  _mainWin->connectedToCore();
}

void QtUi::disconnectedFromCore() {
  _mainWin->disconnectedFromCore();
  GraphicalUi::disconnectedFromCore();
}

void QtUi::useSystemTrayChanged(const QVariant &v) {
  _useSystemTray = v.toBool();
  SystemTray *tray = mainWindow()->systemTray();
  if(_useSystemTray) {
    if(tray->isSystemTrayAvailable())
      tray->setVisible(true);
  } else {
    if(tray->isSystemTrayAvailable() && mainWindow()->isVisible())
      tray->setVisible(false);
  }
}

bool QtUi::haveSystemTray() {
  return mainWindow()->systemTray()->isSystemTrayAvailable() && instance()->_useSystemTray;
}

bool QtUi::isHidingMainWidgetAllowed() const {
  return haveSystemTray();
}

void QtUi::minimizeRestore(bool show) {
  SystemTray *tray = mainWindow()->systemTray();
  if(show) {
    if(tray && !_useSystemTray)
      tray->setVisible(false);
  } else {
    if(tray && _useSystemTray)
      tray->setVisible(true);
  }
  GraphicalUi::minimizeRestore(show);
}

void QtUi::registerNotificationBackend(AbstractNotificationBackend *backend) {
  if(!_notificationBackends.contains(backend)) {
    _notificationBackends.append(backend);
    instance()->connect(backend, SIGNAL(activated(uint)), SLOT(notificationActivated(uint)));
  }
}

void QtUi::unregisterNotificationBackend(AbstractNotificationBackend *backend) {
  _notificationBackends.removeAll(backend);
}

void QtUi::unregisterAllNotificationBackends() {
  _notificationBackends.clear();
}

const QList<AbstractNotificationBackend *> &QtUi::notificationBackends() {
  return _notificationBackends;
}

uint QtUi::invokeNotification(BufferId bufId, AbstractNotificationBackend::NotificationType type, const QString &sender, const QString &text) {
  static int notificationId = 0;

  AbstractNotificationBackend::Notification notification(++notificationId, bufId, type, sender, text);
  _notifications.append(notification);
  foreach(AbstractNotificationBackend *backend, _notificationBackends)
    backend->notify(notification);
  return notificationId;
}

void QtUi::closeNotification(uint notificationId) {
  QList<AbstractNotificationBackend::Notification>::iterator i = _notifications.begin();
  while(i != _notifications.end()) {
    if(i->notificationId == notificationId) {
      foreach(AbstractNotificationBackend *backend, _notificationBackends)
        backend->close(notificationId);
      i = _notifications.erase(i);
    } else ++i;
  }
}

void QtUi::closeNotifications(BufferId bufferId) {
  QList<AbstractNotificationBackend::Notification>::iterator i = _notifications.begin();
  while(i != _notifications.end()) {
    if(!bufferId.isValid() || i->bufferId == bufferId) {
      foreach(AbstractNotificationBackend *backend, _notificationBackends)
        backend->close(i->notificationId);
      i = _notifications.erase(i);
    } else ++i;
  }
}

const QList<AbstractNotificationBackend::Notification> &QtUi::activeNotifications() {
  return _notifications;
}

void QtUi::notificationActivated(uint notificationId) {
  if(notificationId != 0) {
    QList<AbstractNotificationBackend::Notification>::iterator i = _notifications.begin();
    while(i != _notifications.end()) {
      if(i->notificationId == notificationId) {
        BufferId bufId = i->bufferId;
        if(bufId.isValid())
          Client::bufferModel()->switchToBuffer(bufId);
        break;
      }
      ++i;
    }
  }
  closeNotification(notificationId);

  activateMainWidget();
}

void QtUi::bufferMarkedAsRead(BufferId bufferId) {
  if(bufferId.isValid()) {
    closeNotifications(bufferId);
  }
}
