/*

 * Copyright (c) 2009-2010 Nokia Corporation and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description:

 *

 */

#include "nmuiheaders.h"

#include <email_services_api.h>

#include <e32base.h>

static const QString NmSendServiceName = "nmail.com.nokia.symbian.IFileShare";

/*!

    \class NmApplication

    \brief Application class, creates main window and handles view switching.

*/

/*!

    Constructor.

*/

NmApplication::NmApplication(QObject *parent, quint32 accountId)

: QObject(parent),

  mMainWindow(NULL),

  mViewStack(NULL),

  mActiveViewId(NmUiViewNone),

  mUiEngine(NULL),

  mBackAction(NULL),

  mExtensionManager(NULL),

  mMbListModel(NULL),

  mServiceViewId(NmUiViewNone),

  mForegroundService(false),

  mEffects(NULL),

  mAttaManager(NULL),

  mSettingsViewLauncher(NULL),

  mViewReady(false),

  mQueryDialog(NULL),

{

    TRAP_IGNORE(mUiEngine = NmUiEngine::instance());

    // Create network access manager and cache for application use.

    mNetManager = new NmViewerViewNetManager(*mUiEngine);

    QNetworkDiskCache *cache = new QNetworkDiskCache();

    cache->setCacheDirectory(

        QDesktopServices::storageLocation(QDesktopServices::CacheLocation));

    mNetManager->setCache(cache);

    createMainWindow();

    // Attachment manager can be shared between viewer and editor.

    // The application class has the ownership.

    mAttaManager = new NmAttachmentManager(*mUiEngine);

    mSendServiceInterface =

        new NmSendServiceInterface(NmSendServiceName, NULL, *mUiEngine, this);

    mSendServiceInterface2 =

        new NmSendServiceInterface(emailFullServiceNameSend, NULL, *mUiEngine, this);

    mUriServiceInterface =

        new NmUriServiceInterface(NULL, *mUiEngine, this);

    mMailboxServiceInterface =

        new NmMailboxServiceInterface(NULL, *mUiEngine, this);

    mViewerServiceInterface =

        new NmViewerServiceInterface(NULL, this, *mUiEngine);

    if(accountId != 0) {

        QVariant mailbox;

        mailbox.setValue(mUiEngine->getPluginIdByMailboxId(accountId).id());

        mMailboxServiceInterface->displayInboxByMailboxId(mailbox);

    }

    mEffects = new NmUiEffects(*mMainWindow);

}

/*!

    Destructor.

*/

NmApplication::~NmApplication()

{

    if (mQueryDialog) {

        delete mQueryDialog;

        mQueryDialog = NULL;

    }

    delete mSendServiceInterface;

    delete mSendServiceInterface2;

    delete mUriServiceInterface;

    delete mMailboxServiceInterface;

    delete mViewerServiceInterface;

    resetViewStack();

    delete mViewStack;

    NmIcons::freeIcons();

    NmUiEngine::releaseInstance(mUiEngine);

    mUiEngine = NULL;

    delete mBackAction;

    // Workaround: the main window has to be closed (hidden) before deleting

    // the extension manager in order to prevent the main window's title bar

    // from showing when the application is closed.

    if (mMainWindow) {

        // Workaround: assert failure may happen if an open main window is

        // deleted.

        mMainWindow->close();

    }

    delete mExtensionManager;

    if (mNetManager) {

        if (mNetManager->cache()) {

            mNetManager->cache()->clear();

        }

    delete mNetManager;

    mNetManager = NULL;

    }

    // Effects need to be deleted before MainWindow.

    delete mEffects;

    delete mMainWindow;

    delete mAttaManager;

    delete mSettingsViewLauncher;

}

/*!

    Main application window creation.

*/

void NmApplication::createMainWindow()

{

    NM_FUNCTION;

    bool service = XQServiceUtil::isService();

    // Register custom widget files.

    HbStyleLoader::registerFilePath(":nmmessagelistviewitem.widgetml");

    HbStyleLoader::registerFilePath(":nmmessagelistviewitem.css");

    HbStyleLoader::registerFilePath(":nmviewerheader.widgetml");

    HbStyleLoader::registerFilePath(":nmviewerheader.css");

    // Create main window.

    mMainWindow = new HbMainWindow();

    // Connect to lazy loading signal.

    QObject::connect(mMainWindow, SIGNAL(viewReady ()),

                     this, SLOT(viewReady()));

    // Create extension manager.

    mExtensionManager = new NmUiExtensionManager();

    // Create view stack.

    mViewStack = new QStack<NmBaseView*>;

    // Create back action and connect it to prepareForPopView().

    if (mMainWindow) {

        mBackAction = new HbAction(Hb::BackNaviAction,this);

        connect(mBackAction,

                SIGNAL(triggered()),

                this,

                SLOT(prepareForPopView()));

        // Show mainwindow.

        // Services will active it when the view is ready.

        if (!service) {

            mMainWindow->show();

        }

    }

    // Asynchronous operation completion related notifications.

    connect(mUiEngine,

            SIGNAL(operationCompleted(const NmOperationCompletionEvent &)),

            this,

            SLOT(handleOperationCompleted(const NmOperationCompletionEvent &)));

    mMbListModel = &mUiEngine->mailboxListModel();

    // ----------------------------------------------------------------------

    // TODO: Remove or comment out the following code block when the mail

    //       wizard starts to work with Mfe.

    // ----------------------------------------------------------------------

    // Start application to mailbox view. If started as service, there is no

    // need to create views.

    if (!service) {

        NmUiStartParam *startParam = new NmUiStartParam(NmUiViewMailboxList);

        enterNmUiView(startParam);

    }

    // ----------------------------------------------------------------------

    if (mMainWindow) {

        // Start to filter main window events to get "end key" event in all

        // possible situations. Using event()is not enough to catch the event

        // as it is only called if the view widget has the focus. Note: if

        // key capturing (xqkeycapture.h) is required it is probably best to

        // implement an own QMainWindow class and do the capturing there, not

        // in the views.

        mMainWindow->installEventFilter(this);

        // Optimize the custom paint functions.

        // Currently effects to NmViewerHeader::paint() and

        // NmAttachmentListWidget::paint().

        mMainWindow->setOptimizationFlag(QGraphicsView::DontSavePainterState);    

    }

}

/*!

    Slot. React to view ready signal and call current view method.

*/

void NmApplication::viewReady()

{

    mViewReady = true;

    if (mViewStack && !mViewStack->isEmpty()) {

    	NmBaseView *currentView = mViewStack->top();

        if (currentView) {

            currentView->viewReady();

            emit applicationReady();

        }

    }

}

/*!

    Event filter. End key is filtered from the main window and either the

    view takes case of the or the app is exited by default.

*/

bool NmApplication::eventFilter(QObject *obj, QEvent *event)

{

    bool consumed(false);

    if (obj && obj == mMainWindow && event && event->type() == QEvent::KeyPress) {

        QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);

        if (keyEvent->key() == Qt::Key_No) {

            // End key, the "red" key.

            // Exit application if no pending operations are on-going.

        }

    }

    if (!consumed) {

        consumed = QObject::eventFilter(obj, event);

    }

    return consumed;

}

/*!

    Push view to view stack.

*/

void NmApplication::pushView(NmBaseView *newView)

{

    if (newView && mViewStack) {

        NM_COMMENT("NmApplication::pushView() : view exists.");

        newView->setNavigationAction(mBackAction);

        // Store view to be hidden.

        NmBaseView *hideView(NULL);

        if (!mViewStack->isEmpty()) {

            hideView = mViewStack->top();

        }

		else {

			// viewReady should be informed immediately.

			if (mViewReady) {

				newView->viewReady();

			}

		}

        // Activate new view.

    	NM_COMMENT("NmApplication::pushView() : add view.");

        mMainWindow->addView(newView);

        mViewStack->push(newView);

        mMainWindow->setCurrentView(newView);

        mActiveViewId=newView->nmailViewId();

        // Set toolbars orientation.

        HbToolBar *tb = newView->toolBar();

        if (tb) {

            tb->setOrientation(Qt::Horizontal);

        }

        // Hide old view.

        NM_COMMENT("NmApplication::pushView() : remove view.");

        if (hideView) {

            mMainWindow->removeView(hideView);

        }

    }

}

/*!

    Ask from view that is it ok to pop view. This kind of 2-phase popView is

    needed because view may show query dialog for user response.

 */

void NmApplication::prepareForPopView()

{

    if (mViewStack && mViewStack->size() > 0) {

        // Get view pointer.

        NmBaseView *view = mViewStack->top();

        if (view){

			NmUiViewId topViewId = view->nmailViewId();

			// We must know in popView, are we coming with back button from

			// message view to prevent the send animation.

			if (topViewId == NmUiViewMessageEditor) {

				mBackButtonPressed = true;

			}

            // View will call/signal popView if exitting is ok.

            view->okToExitView();        

        }

    }

    // If the view stack is now empty quit the app. This happens also when

    // the app has been started as a service

    else if (mViewStack && mViewStack->size() == 0) {

        exitApplication();

    }

}

/*!

     Hide the application

*/

void NmApplication::hideApplication()

{

    // Hide the application

    XQServiceUtil::toBackground(true);

    // hide the sync indicator as well

    mUiEngine->enableSyncIndicator(false);

}

/*!

    Pop view from view stack. View object is deleted.

*/

void NmApplication::popView()

{

    if (mViewStack && mViewStack->size() > 0) {

        NmBaseView *view = mViewStack->top();    

        if (view) {

            // Get top view id.

            NmUiViewId topViewId = view->nmailViewId();

            // Prepare for send animation if returing from editor and message

            // has been sent.

            if (topViewId == NmUiViewMessageEditor && mUiEngine->isSendingMessage()) {

				// If we are coming from message editor with back button.

				// do not prepare the send animation.

				if (!mBackButtonPressed) {

					mEffects->prepareEffect(NmUiEffects::NmEditorSendMessageAnimation);

				}

	        }

            mBackButtonPressed = false;

            // Move the application to background if closing the message list view

            if (topViewId == NmUiViewMessageList && mViewStack->size() == 1) {

                hideApplication();

                return;

            }

            mViewStack->pop();

            // Call custom exit function.

            view->aboutToExitView();

            // Remove view from stack.

            mMainWindow->removeView(view);

            // If we were in editor and sent a message, pop viewer from stack

            // first so we can go straight to mail list.

            if (!mViewStack->isEmpty() && topViewId == NmUiViewMessageEditor &&

                mUiEngine->isSendingMessage() &&

                mViewStack->top()->nmailViewId() == NmUiViewMessageViewer) {

                NmBaseView *tmpView = mViewStack->pop();

                mMainWindow->removeView(tmpView);

                delete tmpView;

                tmpView = NULL;

            }

            if (!mViewStack->isEmpty()) {

                // Activate next view in stack.

                NmBaseView *showView = mViewStack->top();

                mMainWindow->addView(showView);

                mMainWindow->setCurrentView(showView);

                // Store activated view id.

                mActiveViewId=showView->nmailViewId();

                // Perform send animation if requested.

                mEffects->startEffect(NmUiEffects::NmEditorSendMessageAnimation);

            }

            delete view;

            view = NULL;

            // If view was started as service, move the app now to the

            // background, unless it was started when the app was already in

            // foreground.

            if (mServiceViewId == topViewId) {

                mServiceViewId = NmUiViewNone;

                NM_COMMENT("NmApplication::popView() : returned from service view.");

                // If started as embedded or while the app was in foreground,

                // do not hide the app.

                if (!XQServiceUtil::isEmbedded() &&

                    !mForegroundService) {

                    XQServiceUtil::toBackground(true);

                }

            }

        }

    }

    // If the view stack is now empty quit the app. This happens also when

    // the app has been started as a service.

    if (mViewStack && mViewStack->size() == 0) {

        exitApplication();

    }

}

/*!

    Reset view stack. Remove and destroy view objects.

*/

void NmApplication::resetViewStack()

{

    if (mViewStack && !mViewStack->isEmpty()) {

	    int viewCount = mViewStack->count();

        // Pop and destroy all views

	    for (int i=0 ; i < viewCount ; i++) {

		    NmBaseView *view = mViewStack->pop();

            mMainWindow->removeView(view);

            delete view;

        }

	    mActiveViewId = NmUiViewNone;

    }

}

/*!

    Function activates view based on viewId parameter. If requested view is

    already open, it is requested to reload. Otherwise view object is created

    and pushed to view stack.

*/

void NmApplication::enterNmUiView(NmUiStartParam *startParam)

{

    NM_FUNCTION;

    // Check the validity of start parameter object.

    if (startParam) {

        if (startParam->service() && mMainWindow) {