/*

* 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:

*

*/

#include "cxutils.h"

#include "cxestate.h"

#include "cxesettings.h"

#include "cxenamespace.h"

#include "cxestillcapturecontrol.h"

#include "cxevideocapturecontrol.h"

#include "cxegeotaggingtrail_symbian_p.h"

#include <locationtrailpskeys.h>

namespace

{

    // in milliseconds

    const int STOP_TRAIL_INTERVAL = 10*1000;

}

/*!

* Constructor

*/

CxeGeoTaggingTrailPrivate::CxeGeoTaggingTrailPrivate(CxeStillCaptureControl &stillControl, 

                                                     CxeVideoCaptureControl &videoControl,

                                                     CxeSettings &settings)

    : CxeStateMachine("CxeGeoTaggingTrailPrivate"),

      mStillCaptureControl(stillControl),

      mVideoCaptureControl(videoControl),

      mSettings(settings),

      mStopLocationTrailTimer(),

      mPendingStopTrailSession(false)

{

    CX_DEBUG_ENTER_FUNCTION();

    qRegisterMetaType<CxeGeoTaggingTrail::State>();

    initializeStates();

    QVariant locationTrailState;

    // Get initial location trail state.

    mSettings.get(KPSUidLocationTrail.iUid, KLocationTrailState, 

                  Cxe::PublishAndSubscribe, locationTrailState);

    connect(&mSettings, SIGNAL(settingValueChanged(long int, unsigned long int, QVariant)),

            this, SLOT(handleGeoTaggingPropertyEvent(long int, unsigned long int, QVariant)));

    connect(&mSettings, SIGNAL(settingValueChanged(const QString&,QVariant)),

            this, SLOT(handleSettingValueChanged(const QString&,QVariant)));

    connect(&mStopLocationTrailTimer, SIGNAL(timeout()),

            this, SLOT(timeout()), Qt::UniqueConnection);    

    CX_DEBUG_EXIT_FUNCTION();

}

/*!

* Destructor

*/

CxeGeoTaggingTrailPrivate::~CxeGeoTaggingTrailPrivate()

{

    CX_DEBUG_ENTER_FUNCTION();

    // stop trail and close location utility session

    stop(true);

    CX_DEBUG_EXIT_FUNCTION();

}

/*!

* Start location trail.

*/

void CxeGeoTaggingTrailPrivate::start()

{

    CX_DEBUG_ENTER_FUNCTION();

    int err = KErrNone;

    int settingValue = Cxe::GeoTaggingOff;

    settingValue = mSettings.get(CxeSettingIds::GEOTAGGING, settingValue);

    if (settingValue == Cxe::GeoTaggingOn) {

        // geotagging setting is ON, trying to start location trail

        if (state() == CxeGeoTaggingTrail::NotConnected) {

            err = mLocationTrail.Connect();

            if (!err) {

                CX_DEBUG(("CxeGeoTaggingTrail <> location trail connected"));

                setState(CxeGeoTaggingTrail::Connected);

            }

        }

        if (state() == CxeGeoTaggingTrail::Connected && !err) {

            err = mLocationTrail.StartLocationTrail(RLocationTrail::ECaptureAll);

            if (!err) {

                CX_DEBUG(("CxeGeoTaggingTrail <> starting location trail"));

                mStopLocationTrailTimer.stop(); // stop location timer.

                setState(CxeGeoTaggingTrail::TrailStarted);

            }

        }

        if (err) {

            CX_DEBUG(("CxeGeoTaggingTrailPrivate::start <> FAILED: error = %d ", err));

            stop(true);

        }        

    } else {

        // geotagging setting off, do nothing.

        CX_DEBUG(("CxeGeoTaggingTrail <> start -- Geotagging setting OFF, do nothing.."));

    }

    CX_DEBUG_EXIT_FUNCTION();

}

/*!

* Stop location trail.

* @ param closeSession, indicates if we are willing to close the location utility session.

*/

void CxeGeoTaggingTrailPrivate::stop(bool closeSession)

{

    CX_DEBUG_ENTER_FUNCTION();

    bool ok2StopTrail = canStopTrail();

    if (ok2StopTrail) {

        if (state() == CxeGeoTaggingTrail::TrailStarted ||

            state() == CxeGeoTaggingTrail::DataAvailable) {

            CX_DEBUG(("CxeGeoTaggingTrailPrivate::StopLocationTrail"));

            // stop location trail timer.

            mStopLocationTrailTimer.stop();

            mLocationTrail.StopLocationTrail();

            setState(CxeGeoTaggingTrail::Connected);

        }

        if (closeSession && state() == CxeGeoTaggingTrail::Connected) {

            CX_DEBUG(("CxeGeoTaggingTrailPrivate <> disconnect location trail utility"));

            mLocationTrail.Close();

            setState(CxeGeoTaggingTrail::NotConnected);

        }

    } else {

        // not ready to stop the location trail, TrailStarted the timer.

        if (!mPendingStopTrailSession) {

            mPendingStopTrailSession = closeSession;

        }

        mStopLocationTrailTimer.start(STOP_TRAIL_INTERVAL);

    }

    CX_DEBUG_EXIT_FUNCTION();

}

/*!

* Checking possible stillcapturecontrol/videocapturecontrol states for stopping

* location trail.

*/

bool CxeGeoTaggingTrailPrivate::canStopTrail() const

{

    // checking still capture control states

    bool ok = mStillCaptureControl.state() != CxeStillCaptureControl::Capturing;

    // Still side OK, checking video capture control states

    if (ok) {

        ok = (mVideoCaptureControl.state() != CxeVideoCaptureControl::Recording &&

              mVideoCaptureControl.state() != CxeVideoCaptureControl::Paused &&

              mVideoCaptureControl.state() != CxeVideoCaptureControl::Stopping);

    }

    return ok;

}

/*!

* Slot that is called when timer timeout signal is triggered. We track this to do pending

* stopping of location trail.

*/

void CxeGeoTaggingTrailPrivate::timeout()

{

    CX_DEBUG_ENTER_FUNCTION();

    // stop the pending location trail utility

    stop(mPendingStopTrailSession);

    CX_DEBUG_EXIT_FUNCTION();

}

/*!

* Handle new setting value.

* Check if the geotagging setting has changed.

*/

void CxeGeoTaggingTrailPrivate::handleSettingValueChanged(const QString& settingId, QVariant newValue)

{

    CX_DEBUG_ENTER_FUNCTION();

    if (settingId == CxeSettingIds::GEOTAGGING) {

        if (newValue.toInt() == Cxe::GeoTaggingOn) {

            // setting is turned ON, start location trail

            start();

        } else {

            // setting is turned OFF, stopping location trail

            stop();

        }

    } else if (settingId == CxeSettingIds::GEOTAGGING_DISCLAIMER) {

        if (newValue.toInt() == Cxe::GeoTaggingDisclaimerDisabled) {

            // geotagging disclaimer is diabled, we can start location trail.

            start();

        }

    }

    CX_DEBUG_EXIT_FUNCTION();

}

/*!

* Handle new setting value.

* Check if the geotagging setting has changed.

*/

void CxeGeoTaggingTrailPrivate::handleGeoTaggingPropertyEvent(long int uid,

                                                              unsigned long int key,

                                                              QVariant value)

{

    CX_DEBUG_ENTER_FUNCTION();

    if (uid == KPSUidLocationTrail.iUid && key == KLocationTrailState) {

        CX_DEBUG(("Location trail: new state = %d ", value.toInt()));

        RLocationTrail::TTrailState newState = 

                static_cast<RLocationTrail::TTrailState>(value.toInt());

        if (newState == RLocationTrail::ETrailStarted) {

            CX_DEBUG(("CxeGeoTaggingTrail <> location trail started, data available."));

            setState(CxeGeoTaggingTrail::DataAvailable);

        } else {

           // ignoring all other state changes.

        }

    }

    CX_DEBUG_EXIT_FUNCTION();

}

/*!

Returns current state of Location trail

*/

CxeGeoTaggingTrail::State CxeGeoTaggingTrailPrivate::state() const

{

    return static_cast<CxeGeoTaggingTrail::State> (stateId());

}

/*!

* slot called when state is changed.

*/

void CxeGeoTaggingTrailPrivate::handleStateChanged(int newStateId, CxeError::Id error)

{

    emit stateChanged(static_cast<CxeGeoTaggingTrail::State> (newStateId), error);

}

/*!

* Initialize states for geotaggingtrail

*/

void CxeGeoTaggingTrailPrivate::initializeStates()

{

    // addState( id, name, allowed next states )

    addState(new CxeState(CxeGeoTaggingTrail::NotConnected, "NotConnected", CxeGeoTaggingTrail::Connected));

    addState(new CxeState(CxeGeoTaggingTrail::Connected, "Connected", CxeGeoTaggingTrail::TrailStarted | 

                                                                      CxeGeoTaggingTrail::NotConnected));

    addState(new CxeState(CxeGeoTaggingTrail::TrailStarted, "TrailStarted", CxeGeoTaggingTrail::DataAvailable |

                                                                            CxeGeoTaggingTrail::Connected |

                                                                            CxeGeoTaggingTrail::NotConnected));

    addState(new CxeState(CxeGeoTaggingTrail::DataAvailable, "DataAvailable", CxeGeoTaggingTrail::Connected | 

                                                                              CxeGeoTaggingTrail::NotConnected));

    setInitialState(CxeGeoTaggingTrail::NotConnected);

}

// end of file