/*

 * Copyright (c) 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: 

 *   Control Panel QT UI for username-password based EAP method configuration

 *

 */

/*

 */

// System includes

#include <HbDataForm>

#include <HbDataFormModel>

#include <HbDataFormViewItem>

#include <HbParameterLengthLimiter>

#include <HbMessageBox> 

#include <HbAction>

#include <HbLineEdit>

#include <cpsettingformitemdata.h>

#include <cpitemdatahelper.h>

#include <eapqtvalidator.h>

#include <eapqtexpandedeaptype.h>

// User includes

#include "cpeapuserpasswordui.h"

/*!

 * \class CpEapUserPasswordUi

 * \brief Implementes username-password based EAP method configuration ui. 

 */

// External function prototypes

// Local constants

/*! 

 * If password has already been stored into the database

 * user is shown dummy password (fixed number of asterisks)

 */

static const QVariant passwordExistString = "xxxx";

// ======== LOCAL FUNCTIONS ========

// ======== MEMBER FUNCTIONS ========

/*!

 * Constructor.

 * 

 * @param bearer        Bearer type of the accessed configuration.

 * @param iapId         IAP ID of the accessed configuration.

 * @param plugin        Plugin.

 * @param outerHandle   Outer handle.

 */

CpEapUserPasswordUi::CpEapUserPasswordUi(

    const EapQtConfigInterface::EapBearerType bearer,

    const int iapId,

    const EapQtPluginInfo &plugin, 

    const EapQtPluginHandle& outerHandle) :

        mConfigIf(NULL),

        mPluginInfo(plugin), 

        mOuterHandle(outerHandle), 

        mForm(NULL),

        mModel(NULL),

        mItemDataHelper(NULL),

        mGroupItem(NULL),

        mUsername(NULL), 

        mPasswordPrompt(NULL), 

        mPassword(NULL), 

        mValidatorUsername(NULL),

        mValidatorPassword(NULL), 

        mPasswordStored(false), 

        mPasswordChanged(false), 

        mPasswordEdit(NULL)

{

    qDebug("CpEapUserPasswordUi::CpEapUserPasswordUi");

    // IAP must be valid in construction (check includes

    // EapQtConfigInterface::IapIdUndefined)

    if (iapId < 0) {

        QT_THROW(std::bad_alloc());

        // scoped pointer gets deleted automaticaly on exception

    }

    // Get EAP config interface

    mConfigIf.reset(new EapQtConfigInterface(bearer, iapId));

    createUi();

}

/*!

 * Destructor.

 */

CpEapUserPasswordUi::~CpEapUserPasswordUi()

{

    qDebug("CpEapUserPasswordUi::~CpEapUserPasswordUi");

    // mValidatorUsername, mValidatorPassword

    // mConfigIf: scoped pointer deleted automatically

}

/*!

 * Creates username-password UI and initilizes settings read via

 * EapQtConfigInterface

 */

void CpEapUserPasswordUi::createUi()

{

    qDebug("CpEapUserPasswordUi::createUi");

    // Read Configurations

    bool configurationRead = mConfigIf->readConfiguration(mOuterHandle, mPluginInfo.pluginHandle(),

        mEapConfig);

    if (!configurationRead) {

        qDebug("CpEapUserPasswordUi::initializeUserPasswordUi - read configuration failed.");

    }

    // Construct username-password UI

    mForm = new HbDataForm();

    this->setWidget(mForm);

    mModel = new HbDataFormModel(mForm);

    // Create settings group

        HbParameterLengthLimiter(

                mPluginInfo.localizationId()));

    mModel->appendDataFormItem(mGroupItem);

    // The parameter given as 0 is a HbDataForm pointer, not parent

    mItemDataHelper = new CpItemDataHelper(0);

    mItemDataHelper->setParent(this);

    // Create UI components

    createUsername();

    createPassword();

    mItemDataHelper->bindToForm(mForm);

    mForm->setModel(mModel);

    // Connect signal to add validators when items get activated (visualization created).

        SLOT( setValidator(const QModelIndex) ));

    Q_ASSERT(connected);

    // Expand username-password settings group

    mForm->setExpanded(mModel->indexFromItem(mGroupItem), true);

}

/*!

 * Creates Username lineEdit

 */

void CpEapUserPasswordUi::createUsername()

{

    qDebug("CpEapUserPasswordUi::createUsername()");

    // Username

    // Initialize the value from EapQtConfig

    mUsername->setContentWidgetData("text", mEapConfig.value(EapQtConfig::Username));

    mGroupItem->appendChild(mUsername);

}

/*!

 * Creates Password group:

 * Prompt checkBox and password lineEdit

 */

void CpEapUserPasswordUi::createPassword()

{

    qDebug("CpEapUserPasswordUi::createPassword()");

    // Password prompting

    // Connect signal to disable/enable password when passwordPrompt changed 

        SLOT(passwordPromptChanged(int)));

    mGroupItem->appendChild(mPasswordPrompt);

    // Password

    mPasswordStored = mEapConfig.value(EapQtConfig::PasswordStored).toBool();

    // If password has already been stored into the databse

    // fixed number of asterisks are shown in UI

    if (mPasswordStored) {

        mPassword->setContentWidgetData("text", passwordExistString);

    }

    // Set password echo mode

    mPassword->setContentWidgetData("echoMode", HbLineEdit::Password);

    // Dim password if passwordPrompt is selected

    passwordPromptChanged(mPasswordPrompt->contentWidgetData("checkState") == Qt::Checked);

    // Connect signal to get info that user has changed the password

    mForm->addConnection(mPassword, SIGNAL(editingFinished()), this, SLOT(passwordChanged()));

    mGroupItem->appendChild(mPassword);

}

/*!

 * Adds validators and connects focusIn event to the Password.

 * 

 * @param modelIndex Model index

 */

void CpEapUserPasswordUi::setValidator(const QModelIndex modelIndex)

{

    qDebug("CpEapUserPasswordUi::itemActivated");

    HbDataFormViewItem *viewItem = qobject_cast<HbDataFormViewItem *>

        (mForm->itemByIndex(modelIndex));

    HbDataFormModelItem *modelItem = mModel->itemFromIndex(modelIndex);

    if (modelItem == mUsername) {

        // When username lineEdit is activated (shown) first time, validator is added

        HbLineEdit *usernameEdit = qobject_cast<HbLineEdit *> (viewItem->dataItemContentWidget());

        mValidatorUsername->updateEditor(usernameEdit);

    }

    else if (modelItem == mPassword) {

        // When password lineEdit is activated (shown) first time, validator is added

        mPasswordEdit = qobject_cast<HbLineEdit *> (viewItem->dataItemContentWidget());

        mValidatorPassword->updateEditor(mPasswordEdit);

        // Install event filter to clear dummy password, when password is started to edit.

        mPasswordEdit->installEventFilter(this);

    }

}

/*!

 * This is called when user is about to exit the view.

 * Validates configuration and saves settings.

 * If configuration is not valid prompts question dialog.

 * If user chooses "OK" leaves without saving.

 * 

 */

void CpEapUserPasswordUi::close()

{

    qDebug("CpEapUserPasswordUi::close");

    // Validate configuration

    if (validate()) {

        qDebug("CpEapUserPasswordUi::close - Validation OK");

        // Store settings

        if (storeSettings()){

            qDebug("CpEapUserPasswordUi::close - Settings stored, close view");

            // Close view

            CpBaseSettingView::close();   

        }

        else {

            qDebug("CpEapUserPasswordUi::close - Store settings failed, prompt warning");

            // Store failed. Show error note to user

            QScopedPointer<HbMessageBox> infoBox;

            infoBox->setAttribute(Qt::WA_DeleteOnClose);

            infoBox->setText(hbTrId("txt_occ_info_unable_to_save_setting"));

            infoBox->clearActions();

            // Connect 'OK'-button to CpBaseSettingView 'aboutToClose'-signal

            HbAction *okAction = new HbAction(hbTrId("txt_common_button_ok"));

            infoBox->addAction(okAction);

            bool connected = connect(

                okAction,

                SIGNAL(triggered()),

                this,

                SIGNAL(aboutToClose()));

            Q_ASSERT(connected);

            infoBox->open();

            infoBox.take();

        }

    }

    else {

        qDebug("CpEapUserPasswordUi::close - validation failed. Prompt question.");

        // Validate failed. Request user to exit anyway

        QScopedPointer<HbMessageBox> messageBox;

        messageBox->setAttribute(Qt::WA_DeleteOnClose);

        messageBox->setText(hbTrId("txt_occ_info_incomplete_details_return_without_sa"));

        messageBox->clearActions();

        // Connect 'YES'-button to CpBaseSettingView 'aboutToClose'-signal

        HbAction *okAction = new HbAction(hbTrId("txt_common_button_yes"));

        messageBox->addAction(okAction);

        bool connected = connect(

            okAction,

            SIGNAL(triggered()),

            this,

            SIGNAL(aboutToClose()));

        Q_ASSERT(connected);

        // Clicking 'NO'-button does nothing

        HbAction *cancelAction = new HbAction(hbTrId("txt_common_button_no"));

        messageBox->addAction(cancelAction);

        messageBox->setTimeout(HbPopup::NoTimeout);

        messageBox->open();

        messageBox.take();

    }

}

/*!

 * Converts check box state to boolean.

 * 

 * @param state Check box state

 * 

 * @return true if Check box is checked, false otherwise.

 */

bool CpEapUserPasswordUi::checkStateToBool(const int state)

{

    return (Qt::Unchecked == state ? false : true);

}

/*!

 * Converts boolean to check box state.

 * 

 * @param state Tells is check box checked.

 * 

 * @return Qt check state

 */

int CpEapUserPasswordUi::boolToCheckState(const bool state)

{

    return (false == state ? Qt::Unchecked : Qt::Checked);

}

/*!

 * Dims the password if passwordPrompt has been selected.

 * 

 * @param state Tells is password prompt checked.

 */

void CpEapUserPasswordUi::passwordPromptChanged(int state)

{

    qDebug("CpEapUserPasswordUi::passwordPromptChanged - state: %d", state);

    mPassword->setContentWidgetData("enabled", !checkStateToBool(state));

}

/*!

 * Saves information that password has been changed and must be stored.

 * If the new password is not given, the stored password is kept (if exists).

 */

void CpEapUserPasswordUi::passwordChanged()

{

    if (mPassword->contentWidgetData("text").toString().length() > 0) {

        // Stored password is considered as changed only if user

        // gives new unempty password

        qDebug("CpEapUserPasswordUi::passwordChanged");

        mPasswordChanged = true;

    }

}

/*!

 * When a focus moves into the password editor, possible dummy password is cleared.

 */

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

{

    if (obj == mPasswordEdit && event->type() == QEvent::FocusIn 

        && mPasswordStored && !mPasswordChanged) {

        qDebug("CpEapUserPasswordUi::eventFilter - mPasswordEdit and FocusIn");

        mPassword->setContentWidgetData("text", "");

    }

    return false;

}

/*!

 * Validates settings configuration.

 * 

 * @return true if configuration OK, false otherwise.

 */

bool CpEapUserPasswordUi::validate()

{

    qDebug("CpEapUserPasswordUi::validate");

    bool valid = false;

    if (validateUsername()

        && validatePasswordGroup()) {

        qDebug("CpEapUserPasswordUi::validate - OK");

        valid = true;

    }

    return valid;

}

/*!

 * Validates username

 * 

 * @return true if OK, false otherwise

 */

bool CpEapUserPasswordUi::validateUsername()

{

    qDebug("CpEapUserPasswordUi::validateUsername");

    bool status = false;

    // true if (given username is valid) or 

    // (password prompt is on and username is empty)

    if ((EapQtValidator::StatusOk == mValidatorUsername->validate(

            mUsername->contentWidgetData("text"))) 

        || (mPasswordPrompt->contentWidgetData("checkState") == Qt::Checked

            && mUsername->contentWidgetData("text").toString().length() == 0)) {

        qDebug("CpEapUserPasswordUi::validateUsername - OK");

        status = true;

    }

    return status;       

}

/*!

 * Validates password and passwordPrompt.

 * 

 * @return true if OK, false otherwise.

 */

bool CpEapUserPasswordUi::validatePasswordGroup()

{

    qDebug("CpEapUserPasswordUi::validatePasswordGroup");

    bool status = false;

    // true if password prompt is checked, stored password has not changed

    // or changed/given passrword is valid

    if (mPasswordPrompt->contentWidgetData("checkState") == Qt::Checked 

        || (mPasswordStored && !mPasswordChanged) 

        || (mPasswordStored && mPasswordChanged && EapQtValidator::StatusOk

            == mValidatorPassword->validate(mPassword->contentWidgetData("text").toString()))

        || (!mPasswordStored && EapQtValidator::StatusOk

            == mValidatorPassword->validate(mPassword->contentWidgetData("text").toString()))) {

        qDebug("CpEapUserPasswordUi::validatePasswordGroup - OK");

        status = true;

    }

    return status;

}

/*!

 * Stores settings given via username-password configuration UI

 * 

 * @return false if saving failed, true otherwisev

 */

bool CpEapUserPasswordUi::storeSettings()

{

    qDebug("CpEapUserPasswordUi::storeSettings");

    EapQtConfig eapConfig;

    eapConfig.setValue(EapQtConfig::OuterType, qVariantFromValue(mOuterHandle));

    eapConfig.setValue(EapQtConfig::Username, mUsername->contentWidgetData("text"));

    eapConfig.setValue(EapQtConfig::PasswordPrompt, checkStateToBool(

        mPasswordPrompt->contentWidgetData("checkState").toInt()));

    if (mPasswordPrompt->contentWidgetData("checkState") == Qt::Checked) {

            // Stored password is cleared if prompting has been enabled

            eapConfig.setValue(EapQtConfig::PasswordClear, true);

            eapConfig.setValue(EapQtConfig::Password, "");

        }

        // else do nothing (password is not saved)