//
// Open Service Platform
// Copyright (c) 2012 Samsung Electronics Co., Ltd.
//
// Licensed under the Apache License, Version 2.0 (the License);
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

/**
 * @file	FLoc_LocationManager.cpp
 * @brief	This is the implementation file for the %_LocationManager class.
 *
 * This implementation file contains the definitions of the %_LocationManager class.
 */

#include <cassert>
#include <iostream>
#include <pthread.h>
#include <unique_ptr.h>
#include <FBaseColArrayList.h>
#include <FBaseInteger.h>
#include <FBaseBoolean.h>
#include <FBaseRtMutex.h>
#include <FBaseRtTimer.h>
#include <FBaseRtMonitor.h>
#include <FBaseRtWaitingLoop.h>
#include <FBaseSysLog.h>
#include <FLocCoordinates.h>
#include <FSysSystemTime.h>
#include <FSys_PowerManagerImpl.h>
#include "FLoc_Config.h"
#include "FLoc_LocationImpl.h"
#include "FLoc_LocationManager.h"
#include "FLoc_LocationMonitor.h"
#include "FLoc_LocationRequestInfo.h"
#include "FLoc_SyncLocationRequestInfo.h"

using namespace Tizen::Base;
using namespace Tizen::Base::Collection;
using namespace Tizen::Base::Runtime;
using namespace Tizen::Base::Utility;
using namespace Tizen::System;
using namespace std;

namespace Tizen { namespace Locations
{

_LocationManager* _LocationManager::__pUniqueInstance = null;

_LocationManager::_LocationManager(void)
	: Tizen::Base::Runtime::EventDrivenThread()
	, __locMethodRequested(LOC_METHOD_REQUESTED_NONE)
	, __locationMgrState(LOC_MGR_STATE_IDLE)
	, __minRequestedAccuracy(LOC_ACCURACY_INVALID)
	, __timerInterval(0)
	, __timerTicks(0)
	, __pLocRequestInfoList(null)
	, __pSyncLocRequestInfoList(null)
	, __pLocUpdateTimer(null)
	, __pInitMonitor(null)
{
}

_LocationManager::~_LocationManager(void)
{
	delete __pInitMonitor;
}

result
_LocationManager::StartLocationUpdates(LocationAccuracy accuracy, int interval, _ILocationManagerListener* pListener, RequestId& reqId)
{
	static RequestId nextLocRequestId = 1;
	const int ARRAY_LIST_CAPACITY = 1;

	std::unique_ptr< Tizen::Base::Collection::ArrayList, Tizen::Base::Collection::AllElementsDeleter > pArgList(new (std::nothrow) ArrayList());
	SysTryReturn(NID_LOC, pArgList, E_OUT_OF_MEMORY, E_OUT_OF_MEMORY, "[%s] Memory allocation failed.", GetErrorMessage(E_OUT_OF_MEMORY));

	std::unique_ptr< _LocationRequestInfo > pLocRequestInfo(new (std::nothrow) _LocationRequestInfo(accuracy, interval, pListener, nextLocRequestId));
	SysTryReturn(NID_LOC, pLocRequestInfo, E_OUT_OF_MEMORY, E_OUT_OF_MEMORY, "[%s] Memory allocation failed.", GetErrorMessage(E_OUT_OF_MEMORY));

	result r = pArgList->Construct(ARRAY_LIST_CAPACITY);
	SysTryReturn(NID_LOC, r == E_SUCCESS, r, r, "[%s] Array Construct failed. Propogating.", GetErrorMessage(r));
	r = pArgList->Add(*pLocRequestInfo);
	SysTryReturn(NID_LOC, r == E_SUCCESS, r, r, "[%s] Arraylist addition of an object failed. Propogating", GetErrorMessage(r));

	pLocRequestInfo.release();

	r = SendUserEvent(REQ_ID_START_LOC_UPDATES, pArgList.get());
	SysTryReturn(NID_LOC, r == E_SUCCESS, r, r, "[%s] Failed to send the user event. Propagating.", GetErrorMessage(r));

	reqId = nextLocRequestId;
	nextLocRequestId++;

	pArgList.release();

	SysLog(NID_LOC, "Request ID (%ld) is assigned for the location request with accuracy (%d) and interval (%d).", reqId, accuracy, interval);
	return E_SUCCESS;
}

result
_LocationManager::StopLocationUpdates(RequestId reqId)
{
	SysLog(NID_LOC, "Location update stop requested for request ID (%d).", reqId);
	const int ARRAY_LIST_CAPACITY = 1;

	std::unique_ptr< Tizen::Base::Collection::ArrayList, Tizen::Base::Collection::AllElementsDeleter > pArgList(new (std::nothrow) ArrayList());
	SysTryReturn(NID_LOC, pArgList, E_OUT_OF_MEMORY, E_OUT_OF_MEMORY, "[%s] Memory allocation failed.", GetErrorMessage(E_OUT_OF_MEMORY));

	std::unique_ptr< Integer > pReqId(new (std::nothrow) Integer(static_cast< int >(reqId)));
	SysTryReturn(NID_LOC, pReqId, E_OUT_OF_MEMORY, E_OUT_OF_MEMORY, "[%s] Memory allocation failed.", GetErrorMessage(E_OUT_OF_MEMORY));

	result r = pArgList->Construct(ARRAY_LIST_CAPACITY);
	SysTryReturn(NID_LOC, r == E_SUCCESS, r, r, "[%s] Array Construct failed. Propogating.", GetErrorMessage(r));
	r = pArgList->Add(*pReqId);
	SysTryReturn(NID_LOC, r == E_SUCCESS, r, r, "[%s] Arraylist addition of an object failed. Propogating.", GetErrorMessage(r));

	pReqId.release();

	r = SendUserEvent(REQ_ID_STOP_LOC_UPDATES, pArgList.get());
	SysTryReturn(NID_LOC, r == E_SUCCESS, r, r, "[%s] Failed to send the user event. Propagating.", GetErrorMessage(r));

	pArgList.release();
	return E_SUCCESS;
}

result
_LocationManager::ChangeUpdateInterval(RequestId reqId, int interval)
{
	SysLog(NID_LOC, "Interval update requested for request ID (%d).", reqId);
	const int ARRAY_LIST_CAPACITY = 2;

	std::unique_ptr< Tizen::Base::Collection::ArrayList, Tizen::Base::Collection::AllElementsDeleter > pArgList(new (std::nothrow) ArrayList());
	SysTryReturn(NID_LOC, pArgList, E_OUT_OF_MEMORY, E_OUT_OF_MEMORY, "[%s] Memory allocation failed.", GetErrorMessage(E_OUT_OF_MEMORY));
	result r = pArgList->Construct(ARRAY_LIST_CAPACITY);
	SysTryReturn(NID_LOC, r == E_SUCCESS, r, r, "[%s] Array Construct failed. Propogating.", GetErrorMessage(r));

	std::unique_ptr< Integer > pReqId(new (std::nothrow) Integer(static_cast< int >(reqId)));
	SysTryReturn(NID_LOC, pReqId, E_OUT_OF_MEMORY, E_OUT_OF_MEMORY, "[%s] Memory allocation failed.", GetErrorMessage(E_OUT_OF_MEMORY));

	r = pArgList->Add(*pReqId);
	SysTryReturn(NID_LOC, r == E_SUCCESS, r, r, "[%s] Arraylist addition of an object failed. Propogating.", GetErrorMessage(r));

	pReqId.release();

	std::unique_ptr< Integer > pInterval(new (std::nothrow) Integer(interval));
	SysTryReturn(NID_LOC, pInterval, E_OUT_OF_MEMORY, E_OUT_OF_MEMORY, "[%s] Memory allocation failed.", GetErrorMessage(E_OUT_OF_MEMORY));

	r = pArgList->Add(*pInterval);
	SysTryReturn(NID_LOC, r == E_SUCCESS, r, r, "[%s] Arraylist addition of an object failed. Propogating.", GetErrorMessage(r));

	pInterval.release();

	r = SendUserEvent(REQ_ID_UPDATE_INTERVAL, pArgList.get());
	SysTryReturn(NID_LOC, r == E_SUCCESS, r, r, "[%s] Failed to send the user event. Propagating.", GetErrorMessage(r));

	pArgList.release();
	return E_SUCCESS;
}

result
_LocationManager::RegisterLocationMonitor(_LocationMonitor* pLocationMonitor)
{
	RequestId reqId;
	const int ARRAY_LIST_CAPACITY = 1;

	result r = StartLocationUpdates(pLocationMonitor->GetAccuracy(), 1, null, reqId);
	SysTryReturn(NID_LOC, r == E_SUCCESS, r, r, "[%s] Error to request location updates.", GetErrorMessage(r));

	std::unique_ptr< _SyncLocationRequestInfo > pSyncLocationRequestInfo(new (std::nothrow) _SyncLocationRequestInfo(pLocationMonitor, reqId));
	std::unique_ptr< Tizen::Base::Collection::ArrayList, Tizen::Base::Collection::AllElementsDeleter > pArgList(new (std::nothrow) ArrayList());
	SysTryCatch(NID_LOC, pSyncLocationRequestInfo != null && pArgList != null, , E_OUT_OF_MEMORY,
				"[%s] Memory allocation failed.", GetErrorMessage(E_OUT_OF_MEMORY));

	r = pArgList->Construct(ARRAY_LIST_CAPACITY);
	SysTryCatch(NID_LOC, r == E_SUCCESS, , r, "[%s] Array Construct failed. Propogating.", GetErrorMessage(r));
	r = pArgList->Add(*pSyncLocationRequestInfo.get());
	SysTryCatch(NID_LOC, r == E_SUCCESS, , r, "[%s] Arraylist addition of an object failed. Propogating.", GetErrorMessage(r));

	pSyncLocationRequestInfo.release();

	r = SendUserEvent(REQ_ID_SYNC_LOC_RETRIEVAL, pArgList.get());
	SysTryCatch(NID_LOC, r == E_SUCCESS, , r, "[%s] Failed to send the user event. Propagating.", GetErrorMessage(r));

	pArgList.release();
	return E_SUCCESS;

CATCH:
	StopLocationUpdates(reqId);
	return r;
}

Location
_LocationManager::GetLastKnownLocation(void)
{
	Location location = _LocationImpl::GetLocationInstance();
	Monitor synchronizer;
	result r = synchronizer.Construct();
	SysTryReturn(NID_LOC, r == E_SUCCESS, location, r, "[%s] Propogating.", GetErrorMessage(r));

	std::unique_ptr< Tizen::Base::Collection::ArrayList > pArgList(new (std::nothrow) ArrayList());
	SysTryReturn(NID_LOC, pArgList, location, E_OUT_OF_MEMORY, "[%s] Memory allocation failed.", GetErrorMessage(E_OUT_OF_MEMORY));
	r = pArgList->Construct();
	SysTryReturn(NID_LOC, r == E_SUCCESS, location, r, "[%s] Propogating.", GetErrorMessage(r));

	r = pArgList->Add(location);
	SysTryCatch(NID_LOC, r == E_SUCCESS, , r, "[%s] Propogating", GetErrorMessage(r));
	r = pArgList->Add(synchronizer);
	SysTryCatch(NID_LOC, r == E_SUCCESS, , r, "[%s] Propogating", GetErrorMessage(r));

	r = synchronizer.Enter();
	SysTryCatch(NID_LOC, r == E_SUCCESS, , r, "[%s] Propogating", GetErrorMessage(r));

	r = SendUserEvent(REQ_ID_GET_LAST_LOCATION, pArgList.get());
	SysTryCatch(NID_LOC, r == E_SUCCESS, synchronizer.Exit(), r, "[%s] Propogating", GetErrorMessage(r));
	pArgList.release();

	SysLog(NID_LOC, "Wait till location manager gets the last location.");
	r = synchronizer.Wait();
	SysTryCatch(NID_LOC, r == E_SUCCESS, synchronizer.Exit(), r, "[%s] Propogating", GetErrorMessage(r));
	synchronizer.Exit();
	SysLog(NID_LOC, "Last location(validity: %x, method: %ls) retrieved.", 
		location.IsValid(), location.GetExtraInfo(L"location_method").GetPointer());

	return location;

CATCH:
	pArgList->RemoveAll(false);
	return location;
}

LocationAccuracy
_LocationManager::GetAccuracyLevel(double horAcc) const
{
	if (horAcc <= 5.0)
	{
		return LOC_ACCURACY_FINEST;
	}
	else if (horAcc <= 10.0)
	{
		return LOC_ACCURACY_TEN_METERS;
	}
	else if (horAcc <= 100.0)
	{
		return LOC_ACCURACY_HUNDRED_METERS;
	}
	else if (horAcc <= 1000.0)
	{
		return LOC_ACCURACY_ONE_KILOMETER;
	}
	else if (horAcc <= 10000.0)
	{
		return LOC_ACCURACY_ANY;
	}
	else
	{
		return LOC_ACCURACY_INVALID;
	}
}

_LocationManager*
_LocationManager::GetInstance(void)
{
	static pthread_once_t onceBlock = PTHREAD_ONCE_INIT;
	if (__pUniqueInstance == null)
	{
		ClearLastResult();
		pthread_once(&onceBlock, InitLocationManager);

		result r = GetLastResult();
		if (IsFailed(r))
		{
			onceBlock = PTHREAD_ONCE_INIT;
		}
	}
	return __pUniqueInstance;
}

void
_LocationManager::AddToLocRequestInfoList(const _LocationRequestInfo* pLocRequestInfo)
{
	std::unique_ptr< _LocationRequestInfo > pNewLocRequestInfo(new (std::nothrow) _LocationRequestInfo(*pLocRequestInfo));
	SysTryReturnVoidResult(NID_LOC, pNewLocRequestInfo, E_OUT_OF_MEMORY, "[%s] Memory allocation failed.", GetErrorMessage(E_OUT_OF_MEMORY));
	__pLocRequestInfoList->Add(*pNewLocRequestInfo.get());
	pNewLocRequestInfo.release();

	if (__minRequestedAccuracy == LOC_ACCURACY_INVALID)
	{
		result r = _PowerManagerImpl::PowerControl(1, 1);
		SysTryReturnVoidResult(NID_LOC, r == E_SUCCESS, r, "[%s] Failed to keep the CPU in awake state.", GetErrorMessage(r));
	}
	SysLog(NID_LOC, "Total count of request info is (%d).", __pLocRequestInfoList->GetCount());
	RestartLocationUpdates();
	RestartUpdateTimer();
}

void
_LocationManager::RemoveFromLocRequestInfoList(RequestId reqId)
{
	const int LIST_COUNT_ZERO = 0;
	int count = __pLocRequestInfoList->GetCount();

	for (int i = 0; i < count; i++)
	{
		const _LocationRequestInfo* pLocRequestInfo = static_cast< const _LocationRequestInfo* >(__pLocRequestInfoList->GetAt(i));
		if (reqId == pLocRequestInfo->GetRequestId())
		{
			__pLocRequestInfoList->RemoveAt(i);
			break;
		}
	}
	SysLog(NID_LOC, "Total count of request info is (%d).", __pLocRequestInfoList->GetCount());
	if (__pLocRequestInfoList->GetCount() == LIST_COUNT_ZERO)
	{
		_PowerManagerImpl::PowerControl(1, 0);

		__pLocUpdateTimer->Cancel();
		location_manager_stop(__gpsHandler.handle);
		location_manager_stop(__wpsHandler.handle);

		Reset();
	}
	else
	{
		RestartLocationUpdates();
		RestartUpdateTimer();
	}
}

void
_LocationManager::AddToSyncLocationRequestInfoList(_SyncLocationRequestInfo& syncLocRequestInfo)
{
	static bool hasRetrievalStarted = false;

	result r = __pSyncLocRequestInfoList->Add(syncLocRequestInfo);
	SysTryCatch(NID_LOC, r == E_SUCCESS, , r, "[%s] Failed to add the sync request into the list.", GetErrorMessage(r));

	if (hasRetrievalStarted == true)
	{
		SysLog(NID_LOC, "The retrieval under process.");
		return;
	}
	while (__pSyncLocRequestInfoList->GetCount() != 0)
	{
		hasRetrievalStarted = true;
		const int WAIT_TIME = 1000;
		WaitingLoop::GetInstance()->Wait(WAIT_TIME);

		int count = __pSyncLocRequestInfoList->GetCount();
		for (int i = 0; i < count; i++)
		{
			_SyncLocationRequestInfo* pSyncLocRequestInfo = static_cast< _SyncLocationRequestInfo* >(__pSyncLocRequestInfoList->GetAt(i));
			if (pSyncLocRequestInfo != null)
			{
				SysLog(NID_LOC, "Handle the sync location request with request ID (%ld)", pSyncLocRequestInfo->GetRequestId());

				HandleSyncRetrievalTimerExpiry(*pSyncLocRequestInfo);
			}
		}
	}
	hasRetrievalStarted = false;
	return;

CATCH:
	StopLocationUpdates(syncLocRequestInfo.GetRequestId());
	syncLocRequestInfo.GetLocationMonitor()->Notify();
	delete &syncLocRequestInfo;
}

void
_LocationManager::RemoveSyncLocRetrievalRequest(_SyncLocationRequestInfo& syncLocRequestInfo)
{
	StopLocationUpdates(syncLocRequestInfo.GetRequestId());
	__pSyncLocRequestInfoList->Remove(syncLocRequestInfo, true);
}

void
_LocationManager::RestartLocationUpdates(void)
{
	int count = __pLocRequestInfoList->GetCount();
	int result = 0;
	bool isAccuracyChanged = false;

	for (int i = 0; i < count; i++)
	{
		const _LocationRequestInfo* pLocRequestInfo = static_cast< const _LocationRequestInfo* >(__pLocRequestInfoList->GetAt(i));
		if (__minRequestedAccuracy > pLocRequestInfo->GetAccuracy() || __minRequestedAccuracy == LOC_ACCURACY_INVALID)
		{
			__minRequestedAccuracy = pLocRequestInfo->GetAccuracy();
			isAccuracyChanged = true;
		}
	}
	if (!isAccuracyChanged)
	{
		return;
	}
	SysLog(NID_LOC, "Location updates are restarted and new minimum requested Accuracy is (%d).", __minRequestedAccuracy);

	switch (__locMethodRequested)
	{
	case LOC_METHOD_REQUESTED_NONE:
	{
		SysLog(NID_LOC, "None of the methods running. Start all");

		result = location_manager_start(__gpsHandler.handle);
		SysTryLog(NID_LOC, result == 0, "Failed to start the location updates for GPS.");

		result = location_manager_start(__wpsHandler.handle);
		SysTryLog(NID_LOC, result == 0, "Failed to start the location updates for WPS.");
	}
	break;

	case LOC_METHOD_REQUESTED_GPS:
	{
		SysLog(NID_LOC, "GPS Running. Start WPS.");

		result = location_manager_start(__wpsHandler.handle);
		SysTryLog(NID_LOC, result == 0, "Failed to start the location updates for WPS.");
	}
	break;

	case LOC_METHOD_REQUESTED_WPS:
	{
		SysLog(NID_LOC, "WPS Running. Start GPS.");

		result = location_manager_start(__gpsHandler.handle);
		SysTryLog(NID_LOC, result == 0, "Failed to start the location updates for GPS.");
	}
	break;

	case LOC_METHOD_REQUESTED_ALL:
	{
		SysLog(NID_LOC, "All the providers are already started.");
	}
	break;
	}

	__locationMgrState = LOC_MGR_STATE_FAST_SENSING;
	__locMethodRequested = LOC_METHOD_REQUESTED_ALL;
}

void
_LocationManager::RestartUpdateTimer(void)
{
	int gcd = 1;
	int count = __pLocRequestInfoList->GetCount();

	__pLocUpdateTimer->Cancel();

	if (count > 0)
	{
		const _LocationRequestInfo* pLocRequestInfo = static_cast< _LocationRequestInfo* >(__pLocRequestInfoList->GetAt(0));
		gcd = pLocRequestInfo->GetInterval();

		for (int i = 1; i < count; i++)
		{
			pLocRequestInfo = static_cast< const _LocationRequestInfo* >(__pLocRequestInfoList->GetAt(i));
			int interval = pLocRequestInfo->GetInterval();
			if (gcd != interval)
			{
				while (gcd != 0 && interval != 0)
				{
					((gcd > interval) ? gcd : interval) %= ((gcd > interval) ? interval : gcd);
				}
				gcd += interval;
			}
		}
	}
	__timerInterval = gcd;
	__timerTicks = 0;

	SysLog(NID_LOC, "Updated Timer interval is (%d).", __timerInterval);
	result r = __pLocUpdateTimer->Start(__timerInterval * 1000);
	if (IsFailed(r))
	{
		SysLog(NID_LOC, "Failed to start the Location update timer.");
	}
}

void
_LocationManager::HandleSyncRetrievalTimerExpiry(_SyncLocationRequestInfo& syncLocRequestInfo)
{
	LocationAccuracy accuracy = LOC_ACCURACY_INVALID;
	DateTime timestamp = DateTime::GetMinValue();

	Location location = GetRecentLocationAvailable();
	SysLog(NID_LOC, "Location(timestamp: %ls, validity: %x, accuracy: %f) is retrieved.",
		   location.GetTimestamp().ToString().GetPointer(), location.IsValid(), location.GetHorizontalAccuracy());
	if (location.IsValid())
	{
		accuracy = GetAccuracyLevel(location.GetHorizontalAccuracy());
		timestamp = location.GetTimestamp();
	}

	bool inTime = syncLocRequestInfo.IsInTime(timestamp);
	bool accurate = syncLocRequestInfo.IsAccuracySatisfying(accuracy);
	if (inTime && accurate)
	{
		unique_ptr< Location > pLocation(new (std::nothrow) Location(location));
		SysTryCatchLabel(NID_LOC, pLocation != null, , NOTIFY, E_OUT_OF_MEMORY,
						 "[%s] Memory allocation failed.", GetErrorMessage(E_OUT_OF_MEMORY));
		syncLocRequestInfo.GetLocationMonitor()->SetLocation(pLocation.get());
		pLocation.release();

		goto NOTIFY;
	}
	if (syncLocRequestInfo.GetTickCount() > MAX_WAIT_TIME_FOR_SYNC_LOC)
	{
		if (inTime)
		{
			unique_ptr< Location > pLocation(new (std::nothrow) Location(location));
			SysTryCatchLabel(NID_LOC, pLocation != null, , NOTIFY, E_OUT_OF_MEMORY,
							 "[%s] Memory allocation failed.", GetErrorMessage(E_OUT_OF_MEMORY));
			syncLocRequestInfo.GetLocationMonitor()->SetLocation(pLocation.get());
			pLocation.release();

			goto NOTIFY;
		}
		else
		{
			SysLog(NID_LOC, "Unable to fix the current location in %d ticks.", MAX_WAIT_TIME_FOR_SYNC_LOC);
			goto NOTIFY;
		}
	}

	SysLog(NID_LOC, "Wait for next location(Tick: %d).", syncLocRequestInfo.GetTickCount());
	syncLocRequestInfo.IncrementTickCount();
	return;

NOTIFY:
	syncLocRequestInfo.GetLocationMonitor()->Notify();
	RemoveSyncLocRetrievalRequest(syncLocRequestInfo);
}

result
_LocationManager::SetLocationInformation(double latitude, double longitude, double altitude, time_t timestamp, location_method_e locMethod, Location* pLocation)
{
	SysSecureLog(NID_LOC, "Location Information is: Latitude (%lf), Longitude (%lf), Altitude (%lf), TimeStamp (%ld), Location method (%d)", latitude, longitude, altitude, timestamp, locMethod);

	int res = -1;
	LocationAccuracy requiredAcc;
	int rangeValue = 0;

	//Accuracy details.
	location_accuracy_level_e accLevel = LOCATIONS_ACCURACY_NONE;
	double horAcc = Tizen::Locations::NaN;
	double verAcc = Tizen::Locations::NaN;

	//Velocity details.
	double climb = Tizen::Locations::NaN;
	double direction = Tizen::Locations::NaN;
	double speed = Tizen::Locations::NaN;
	time_t time_stamp = 0;

	RequestId requestId;
	Location locationData = _LocationImpl::GetLocationInstance();
	_LocationImpl* pLocDataImpl = _LocationImpl::GetInstance(locationData);

	switch (locMethod)
	{
	case LOCATIONS_METHOD_GPS:
	{
		res = location_manager_get_accuracy(__gpsHandler.handle, &accLevel, &horAcc, &verAcc);
		SysLog(NID_LOC, "Get Accuracy: Result (%d), Horizontal Acc (%lf), Vertical Acc (%lf)", res, horAcc, verAcc);
		SysTryReturnResult(NID_LOC, res == 0, E_SYSTEM, "Invalid accuracy values from Native Location Provider.");

		res = location_manager_get_velocity(__gpsHandler.handle, &climb, &direction, &speed, &time_stamp);
		SysLog(NID_LOC, "Get Velocity: Result (%d), Climb (%lf), Direction (%lf), Speed (%lf), Time stamp (%ld)", res, climb, direction, speed, time_stamp);
		SysTryReturnResult(NID_LOC, res == 0, E_SYSTEM, "Invalid accuracy values from Native Location Provider.");

		pLocDataImpl->SetExtraInfo(L"location_method", L"gps");
		requestId = REQ_ID_SUSTAIN_GPS;
	}
	break;

	case LOCATIONS_METHOD_WPS:
	{
		res = location_manager_get_accuracy(__wpsHandler.handle, &accLevel, &horAcc, &verAcc);
		SysLog(NID_LOC, "Get Accuracy: Result (%d), Horizontal Acc (%lf), Vertical Acc (%lf)", res, horAcc, verAcc);
		SysTryReturnResult(NID_LOC, res == 0, E_SYSTEM, "Invalid accuracy values from Native Location Provider.");

		res = location_manager_get_velocity(__wpsHandler.handle, &climb, &direction, &speed, &time_stamp);
		SysTryLog(NID_LOC, res == 0, "Get Velocity: Result (%d), Climb (%lf), Direction (%lf), Speed (%lf), Time stamp (%ld)", res, climb, direction, speed, time_stamp);

		pLocDataImpl->SetExtraInfo(L"location_method", L"network");
		requestId = REQ_ID_SUSTAIN_WPS;
	}
	break;

	default:
		SysTryReturn(NID_LOC, false, E_INVALID_ARG, E_INVALID_ARG, "[E_INVALID_ARG] The location method is not valid");
	}

	Coordinates coordinates;
	coordinates.Set(latitude, longitude, altitude);
	pLocDataImpl->SetCoordinates(coordinates);
	pLocDataImpl->SetHorizontalAccuracy(horAcc);
	pLocDataImpl->SetVerticalAccuracy(verAcc);
	pLocDataImpl->SetTimestamp((long long) timestamp * 1000);
	pLocDataImpl->SetCourse(direction);
	pLocDataImpl->SetSpeed(speed);
	pLocDataImpl->SetValidity(true);
	*pLocation = locationData;

	requiredAcc = __minRequestedAccuracy;
	switch (requiredAcc)
	{
	case LOC_ACCURACY_FINEST:
		rangeValue = ACCURACY_FINEST;
		break;

	case LOC_ACCURACY_TEN_METERS:
		rangeValue = ACCURACY_TEN_MTRS;
		break;

	case LOC_ACCURACY_HUNDRED_METERS:
		rangeValue = ACCURACY_HUNDRED_MTRS;
		break;

	case LOC_ACCURACY_ONE_KILOMETER:
		rangeValue = ACCURACY_ONE_KILOMETER;
		break;

	case LOC_ACCURACY_ANY:
		rangeValue = ACCURACY_ANY;
		break;

	case LOC_ACCURACY_INVALID:
	// follow through
	default:
		SysAssertf(false, "The Accuracy value is not defined.");
	}

	if (__locationMgrState == LOC_MGR_STATE_FAST_SENSING && horAcc <= rangeValue)
	{
		SysLog(NID_LOC, "State is LOC_MGR_STATE_FAST_SENSING and accuracy is within range. RequestId is (%d)", requestId);
		__locationMgrState = LOC_MGR_STATE_FAST_SENSING_SETTLED;
		SendUserEvent(requestId, null);
	}
	else if (__locationMgrState == LOC_MGR_STATE_FAST_SENSING_SETTLED && horAcc > rangeValue)
	{
		SysLog(NID_LOC, "State is LOC_MGR_STATE_FAST_SENSING_SETTLED and accuracy is out of range. Restart location updates.");
		SendUserEvent(REQ_ID_RESTART_LOC_UPDATES, null);
	}
	return E_SUCCESS;
}

void
_LocationManager::SendLocationCallbacks(void)
{
	const Location* pBestLocation = FindBestLocation();

	SysLog(NID_LOC, "Send location(validity: %x) through the callback.", pBestLocation->IsValid());
	unique_ptr< Location > pLocation(new (std::nothrow) Location(*pBestLocation));
	SysTryReturnVoidResult(NID_LOC, pLocation != null, E_OUT_OF_MEMORY, "[%s] Memory allocation failed.", GetErrorMessage(E_OUT_OF_MEMORY));

	int interval = __timerTicks * __timerInterval;
	for (int i = 0; i < __pLocRequestInfoList->GetCount(); i++)
	{
		const _LocationRequestInfo* pLocRequestInfo = static_cast< const _LocationRequestInfo* >(__pLocRequestInfoList->GetAt(i));
		if (interval % pLocRequestInfo->GetInterval() == 0 && pLocRequestInfo->GetListener() != null)
		{
			pLocRequestInfo->GetListener()->OnLocationUpdated(pLocRequestInfo->GetRequestId(), *pLocation.get());
		}
	}
}

void
_LocationManager::Reset(void)
{
	__locMethodRequested = LOC_METHOD_REQUESTED_NONE;
	__locationMgrState = LOC_MGR_STATE_IDLE;
	__minRequestedAccuracy = LOC_ACCURACY_INVALID;
	__timerInterval = 0;
	__timerTicks = 0;
}

result
_LocationManager::Construct()
{
	result r = EventDrivenThread::Construct();
	SysTryReturnResult(NID_LOC, r == E_SUCCESS, r, "[%s] Failed to Construct", GetErrorMessage(r));

	std::unique_ptr< Monitor > pMonitor(new (std::nothrow) Monitor());
	SysTryReturnResult(NID_LOC, pMonitor, E_OUT_OF_MEMORY, "[%s] Memory allocation failed.", GetErrorMessage(E_OUT_OF_MEMORY));
	r = pMonitor->Construct();
	SysTryReturnResult(NID_LOC, r == E_SUCCESS, r, "[%s] Failed to Construct Monitor. Propagating.", GetErrorMessage(r));

	__pInitMonitor = pMonitor.release();

	return E_SUCCESS;
}

Location
_LocationManager::GetLastKnownLocation(location_method_e nativeLocMethod)
{
	String locationMethod;
	location_manager_h nativeHandle = null;
	switch (nativeLocMethod)
	{
	case LOCATIONS_METHOD_GPS:
	{
		nativeHandle = __gpsHandler.handle;
		locationMethod = L"gps";
	}
	break;

	case LOCATIONS_METHOD_WPS:
	{
		nativeHandle = __wpsHandler.handle;
		locationMethod = L"network";
	}
	break;

	default:
		break;
	}
	SysLog(NID_LOC, "Last location requested(method: %x, handle: %x).", nativeLocMethod, nativeHandle);

	Location location = _LocationImpl::GetLocationInstance();
	if (nativeHandle != null)
	{
		_LocationImpl* pLocationImpl = _LocationImpl::GetInstance(location);

		double altitude = Tizen::Locations::NaN;
		double latitude = Tizen::Locations::NaN;
		double longitude = Tizen::Locations::NaN;
		time_t timestampPosition = 0;

		int res = location_manager_get_last_position(nativeHandle, &altitude, &latitude, &longitude, &timestampPosition);
		SysTryCatch(NID_LOC, res == 0, , E_SYSTEM, "[E_SYSTEM] Failed to fetch last position from nativeHandle(%x).", nativeHandle);
		SysSecureLog(NID_LOC, "Last position(latitude: %lf, longitude: %lf, altitude: %lf, timestamp: %ld",
			latitude, longitude, altitude, timestampPosition);

		Coordinates coord;
		coord.Set(latitude, longitude, altitude);
		pLocationImpl->SetCoordinates(coord);

		double horAcc = Tizen::Locations::NaN;
		double verAcc = Tizen::Locations::NaN;
		location_accuracy_level_e level;
		res = location_manager_get_last_accuracy(nativeHandle, &level, &horAcc, &verAcc);
		if (res == 0)
		{
			SysLog(NID_LOC, "Last accuracy(horAcc: %lf, vAcc: %lf, level: %x)", horAcc, verAcc, level);
			pLocationImpl->SetHorizontalAccuracy(horAcc);
			pLocationImpl->SetVerticalAccuracy(verAcc);
		}

		double climb = Tizen::Locations::NaN;
		double direction = Tizen::Locations::NaN;
		double speed = Tizen::Locations::NaN;
		time_t timestampVelocity = 0;
		res = location_manager_get_last_velocity(nativeHandle, &climb, &direction, &speed, &timestampVelocity);
		if (res == 0)
		{
			SysLog(NID_LOC, "Last velocity(climb: %lf, direction: %lf, speed: %lf, timestamp: %ld)",
				climb, direction, speed, timestampVelocity);
			pLocationImpl->SetCourse(direction);
			pLocationImpl->SetSpeed(speed);
		}

		if (nativeLocMethod == LOCATIONS_METHOD_GPS)
		{
			int satUsedCount = 0;
			int satViewCount = 0;
			time_t timestampSatellite = 0;
			String satInfo = L"";
			res = gps_status_get_last_satellite(nativeHandle, &satUsedCount, &satViewCount, &timestampSatellite);
			if (res == 0)
			{
				long timeDiff = abs(timestampPosition - timestampSatellite);
				res = gps_status_foreach_last_satellites_in_view(nativeHandle, SatelliteInfoUpdated, &satInfo);
				SysLog(NID_LOC, "Last satellite(foreachResult: %d, inUse: %d, inView: %d, timestamp: %ld, timeDiff: %ld)",
					res, satUsedCount, satViewCount, timestampSatellite, timeDiff);

				satInfo.Trim();
				SysLog(NID_LOC, "Last satellite(info: %ls)", satInfo.GetPointer());
				pLocationImpl->SetExtraInfo(L"satellite", satInfo);
			}
		}
		pLocationImpl->SetTimestamp(((long long)timestampPosition) * 1000); // in milliseconds
		pLocationImpl->SetValidity(true);
		pLocationImpl->SetExtraInfo(L"location_method", locationMethod);
	}

	ClearLastResult();
	return location;

CATCH:
	return location;
}

Location
_LocationManager::GetRecentLocationAvailable(void)
{
	long long gpsTimestamp = 0;
	long long wpsTimestamp = 0;

	Location lastGpsLocation = GetLastKnownLocation(LOCATIONS_METHOD_GPS);
	if (lastGpsLocation.IsValid())
	{
		gpsTimestamp = _LocationImpl::GetInstance(lastGpsLocation)->GetTimestampInMs();
	}

	Location lastWpsLocation = GetLastKnownLocation(LOCATIONS_METHOD_WPS);
	if (lastWpsLocation.IsValid())
	{
		wpsTimestamp = _LocationImpl::GetInstance(lastWpsLocation)->GetTimestampInMs();
	}

	SysLog(NID_LOC, "Compare timestamp(gps: %lld, wps: %lld) for recent location.", gpsTimestamp, wpsTimestamp);
	if (gpsTimestamp >= wpsTimestamp)
	{
		return lastGpsLocation;
	}
	else
	{
		return lastWpsLocation;
	}
}

void 
_LocationManager::UpdateLocRequestInfoList(RequestId reqId, int interval)
{
	int count = __pLocRequestInfoList->GetCount();

	for (int i = 0; i < count; i++)
	{
		_LocationRequestInfo* pLocRequestInfo = static_cast< _LocationRequestInfo* >(__pLocRequestInfoList->GetAt(i));
		if (reqId == pLocRequestInfo->GetRequestId())
		{
			pLocRequestInfo->SetInterval(interval);
			RestartUpdateTimer();
			break;
		}
	}
}

const Location*
_LocationManager::FindBestLocation(void)
{
	switch (__locMethodRequested)
	{
	case LOC_METHOD_REQUESTED_GPS:
	{
		SysLog(NID_LOC, "GPS location provider running.");
		return __gpsHandler.pLocation.get();
	}
	break;

	case LOC_METHOD_REQUESTED_WPS:
	{
		SysLog(NID_LOC, "WPS location provider running.");
		return __wpsHandler.pLocation.get();
	}
	break;

	case LOC_METHOD_REQUESTED_ALL:
	{
		SysLog(NID_LOC, "All the methods are running. Get the best location among all the providers.");
		long long gpsTimestamp = 0;
		long long wpsTimestamp = 0;

		if (__gpsHandler.pLocation->IsValid())
		{
			gpsTimestamp = _LocationImpl::GetInstance(*__gpsHandler.pLocation)->GetTimestampInMs();
		}
		if (__wpsHandler.pLocation->IsValid())
		{
			wpsTimestamp = _LocationImpl::GetInstance(*__wpsHandler.pLocation)->GetTimestampInMs();
		}

		SysLog(NID_LOC, "Compare timestamp(gps: %lld, wps: %lld) of different locations.", gpsTimestamp, wpsTimestamp);
		if (gpsTimestamp > wpsTimestamp)
		{
			SysLog(NID_LOC, "GPS time stamp is greater than WPS.");
			return __gpsHandler.pLocation.get();
		}
		else if (wpsTimestamp > gpsTimestamp)
		{
			SysLog(NID_LOC, "WPS time stamp is greater than GPS.");
			return __wpsHandler.pLocation.get();
		}
		else if (gpsTimestamp == wpsTimestamp)
		{
			if (__gpsHandler.pLocation->GetHorizontalAccuracy() <= __wpsHandler.pLocation->GetHorizontalAccuracy())
			{
				SysLog(NID_LOC, "GPS time stamp is equal to WPS and GPS accuracy is better than WPS.");
				return __gpsHandler.pLocation.get();
			}
			else
			{
				SysLog(NID_LOC, "WPS time stamp is equal to GPS but WPS accuracy is better than GPS.");
				return __wpsHandler.pLocation.get();
			}
		}
	}
	break;

	case LOC_METHOD_REQUESTED_NONE:
	// follow through
	default:
		SysLog(NID_LOC, "Location updates not running.");
		return null;
	}

	SysLog(NID_LOC, "Returning null as none of the conditions are satsfied.");
	return null;
}

result
_LocationManager::GetLocation(location_method_e nativeLocMethod)
{
	const int MAX_VALID_TIME_DIFFERENCE = 2000;
	double altitude = 0.0;
	double latitude = 0.0;
	double longitude = 0.0;
	time_t timestamp;
	int res = -1;
	int satellitesInViewCount = 0;
	int satellitesInUseCount = 0;
	time_t timestampSatellite = 0;
	String satInfo = L"";
	long long timeDiff = 0;
	location_manager_h nativeHandle = null;
	Location* pLocation = null;

	switch (nativeLocMethod)
	{
	case LOCATIONS_METHOD_GPS:
	{
		nativeHandle = __gpsHandler.handle;
		pLocation = __gpsHandler.pLocation.get();
	}
	break;

	case LOCATIONS_METHOD_WPS:
	{
		nativeHandle = __wpsHandler.handle;
		pLocation = __wpsHandler.pLocation.get();
	}
	break;

	default:
		break;
	}

	res = location_manager_get_position(nativeHandle, &altitude, &latitude, &longitude, &timestamp);
	SysTryReturnResult(NID_LOC, res == 0, E_SYSTEM,  "Failed to obtain the natvie location information for the method (%x)", nativeLocMethod);

	if (res == 0)
	{
		result r = SetLocationInformation(latitude, longitude, altitude, timestamp, nativeLocMethod, pLocation);
		if (r != E_SUCCESS)
		{
			SysLog(NID_LOC, "Failed to set the location information");
		}

		if (nativeLocMethod == LOCATIONS_METHOD_GPS)
		{
			res = gps_status_get_satellite(__gpsHandler.handle, &satellitesInUseCount, &satellitesInViewCount, &timestampSatellite);

			timeDiff = abs(timestamp - timestampSatellite);
			timeDiff = timeDiff * 1000;
			SysLog(NID_LOC, "Result (%d), Satellites in Use (%d), Satellites in View (%d), Time stamp (%ld), Time Difference (Loc and Sat) (%ld)",
				   res, satellitesInUseCount, satellitesInViewCount, timestampSatellite, timeDiff);
			if (res == 0 && timeDiff <= MAX_VALID_TIME_DIFFERENCE)
			{
				res = gps_status_foreach_satellites_in_view(__gpsHandler.handle, SatelliteInfoUpdated, &satInfo);
			}
			satInfo.Trim();
			SysLog(NID_LOC, "Result of get satellite is (%d) and satelliteInfo string representation is (%ls)", res, satInfo.GetPointer());
			_LocationImpl::GetInstance(*__gpsHandler.pLocation.get())->SetExtraInfo(L"satellite", satInfo);
		}
	}

	return E_SUCCESS;
}

bool
_LocationManager::OnStart(void)
{
	SysTryReturn(NID_LOC, __pInitMonitor, false, E_INVALID_STATE, "[E_INVALID_STATE] __pInitMonitor must not be null.");

	int res = -1;

	std::unique_ptr< Tizen::Base::Collection::ArrayList, AllElementsDeleter > pLocInfoRequestList(new (std::nothrow) ArrayList());
	SysTryReturn(NID_LOC, pLocInfoRequestList != null, false, E_OUT_OF_MEMORY, "[%s] Memory allocation failed.", GetErrorMessage(E_OUT_OF_MEMORY));
	result r = pLocInfoRequestList->Construct();
	SysTryReturn(NID_LOC, r == E_SUCCESS, false, E_SYSTEM, "[E_SYSTEM] Failed to construct the Location Request list.");

	std::unique_ptr< Tizen::Base::Collection::ArrayList, AllElementsDeleter > pSyncLocInfoRequestList(new (std::nothrow) ArrayList());
	SysTryReturn(NID_LOC, pSyncLocInfoRequestList != null, false, E_OUT_OF_MEMORY, "[%s] Memory allocation failed.", GetErrorMessage(E_OUT_OF_MEMORY));
	r = pSyncLocInfoRequestList->Construct();
	SysTryReturn(NID_LOC, r == E_SUCCESS, false, E_SYSTEM, "[E_SYSTEM] Failed to construct the Sync Location Request list.");

	unique_ptr< Tizen::Locations::Location > pGpsLocation(_LocationImpl::GetLocationInstanceN());
	SysTryReturn(NID_LOC, pGpsLocation != null, false, E_OUT_OF_MEMORY, "[%s] Memory allocation failed.", GetErrorMessage(E_OUT_OF_MEMORY));
	unique_ptr< Tizen::Locations::Location > pWpsLocation(_LocationImpl::GetLocationInstanceN());
	SysTryReturn(NID_LOC, pWpsLocation != null, false, E_OUT_OF_MEMORY, "[%s] Memory allocation failed.", GetErrorMessage(E_OUT_OF_MEMORY));

	std::unique_ptr< Tizen::Base::Runtime::Timer > pLocUpdateTimer(new (std::nothrow) Timer());
	r = pLocUpdateTimer->Construct(*this);
	SysTryReturn(NID_LOC, r == E_SUCCESS, false, E_SYSTEM, "[E_SYSTEM] Failed to construct the location timer.");

	res = location_manager_create(LOCATIONS_METHOD_GPS, &__gpsHandler.handle);
	SysTryReturn(NID_LOC, res == 0, false, E_SYSTEM, "[E_SYSTEM] Failed to create Native GPS Location provider.");
	res = location_manager_set_service_state_changed_cb(__gpsHandler.handle, GpsServiceUpdateCallback, this);
	SysTryCatch(NID_LOC, res == 0, , E_SYSTEM, "[E_SYSTEM] Failed to register service callback for Native GPS Location provider.");

	res = location_manager_create(LOCATIONS_METHOD_WPS, &__wpsHandler.handle);
	SysTryCatch(NID_LOC, res == 0, , E_SYSTEM, "[E_SYSTEM] Failed to create Native WPS Location provider.");
	res = location_manager_set_service_state_changed_cb(__wpsHandler.handle, WpsServiceUpdateCallback, this);
	SysTryCatch(NID_LOC, res == 0, , E_SYSTEM, "[E_SYSTEM] Failed to register service callback for Native WPS Location provider.");

	__pLocRequestInfoList = std::move(pLocInfoRequestList);
	__pSyncLocRequestInfoList = std::move(pSyncLocInfoRequestList);
	__pLocUpdateTimer = std::move(pLocUpdateTimer);
	__gpsHandler.pLocation= std::move(pGpsLocation);
	__wpsHandler.pLocation= std::move(pWpsLocation);

	r = __pInitMonitor->Enter();
	SysTryCatch(NID_LOC, r == E_SUCCESS, , r, "[%s] Failed to Enter Monitor. Propagating.", GetErrorMessage(r));
	r = __pInitMonitor->Notify();
	SysTryCatch(NID_LOC, r == E_SUCCESS, , r, "[%s] Failed to Notify Monitor. Propagating.", GetErrorMessage(r));
	r = __pInitMonitor->Exit();
	SysTryCatch(NID_LOC, r == E_SUCCESS, , r, "[%s] Failed to Exit Monitor. Propagating.", GetErrorMessage(r));

	SysLog(NID_LOC, "All the resources for location manager successfully created.");
	return true;

CATCH:
	if (__gpsHandler.handle)
	{
		location_manager_destroy(__gpsHandler.handle);
	}

	if (__wpsHandler.handle)
	{
		location_manager_destroy(__wpsHandler.handle);
	}
	return false;
}

void
_LocationManager::OnStop(void)
{
	delete __pInitMonitor;
	__pInitMonitor = null;

	if (__gpsHandler.handle)
	{
		location_manager_destroy(__gpsHandler.handle);
	}
	if (__wpsHandler.handle)
	{
		location_manager_destroy(__wpsHandler.handle);
	}
}

void
_LocationManager::OnUserEventReceivedN(RequestId requestId, IList* pArgs)
{
	const int ARRAY_LIST_CAPACITY = 1;

	switch (requestId)
	{
	case REQ_ID_START_LOC_UPDATES:
	{
		SysLog(NID_LOC, "REQ_ID_START_LOC_UPDATES");
		SysTryReturnVoidResult(NID_LOC, pArgs, E_INVALID_ARG, "[E_INVALID_ARG] Null argument encountered. Ignored.");
		_LocationRequestInfo* pLocRequestInfo = null;
		SysTryCatch(NID_LOC, pArgs->GetCount() == ARRAY_LIST_CAPACITY, pArgs->RemoveAll(true), E_INVALID_ARG, "[E_INVALID_ARG] Invalid argument encountered. Ignored.");
		pLocRequestInfo = static_cast< _LocationRequestInfo* >(pArgs->GetAt(0));
		SysTryCatch(NID_LOC, pLocRequestInfo, , E_INVALID_ARG, "[E_INVALID_ARG] Invalid argument encountered. Ignored.");

		AddToLocRequestInfoList(pLocRequestInfo);
	}
	break;

	case REQ_ID_STOP_LOC_UPDATES:
	{
		SysLog(NID_LOC, "REQ_ID_STOP_LOC_UPDATES");
		SysTryReturnVoidResult(NID_LOC, pArgs, E_INVALID_ARG, "[E_INVALID_ARG] Null argument encountered. Ignored.");
		Integer* pReqId = null;
		SysTryCatch(NID_LOC, pArgs->GetCount() == ARRAY_LIST_CAPACITY, pArgs->RemoveAll(true), E_INVALID_ARG, "[E_INVALID_ARG] Invalid argument encountered. Ignored.");
		pReqId = static_cast< Integer* >(pArgs->GetAt(0));
		SysTryCatch(NID_LOC, pReqId, , E_INVALID_ARG, "[E_INVALID_ARG] Invalid argument encountered. Ignored.");

		RemoveFromLocRequestInfoList(static_cast< long >(pReqId->ToInt()));
	}
	break;

	case REQ_ID_RESTART_LOC_UPDATES:
	{
		SysLog(NID_LOC, "REQ_ID_RESTART_LOC_UPDATES.");
		RestartLocationUpdates();
	}
	break;

	case REQ_ID_SUSTAIN_GPS:
	{
		SysLog(NID_LOC, "REQ_ID_SUSTAIN_GPS.");
		location_manager_stop(__wpsHandler.handle);
		__locMethodRequested = LOC_METHOD_REQUESTED_GPS;
	}
	break;

	case REQ_ID_SUSTAIN_WPS:
	{
		SysLog(NID_LOC, "REQ_ID_SUSTAIN_WPS.");
		location_manager_stop(__gpsHandler.handle);
		__locMethodRequested = LOC_METHOD_REQUESTED_WPS;
	}
	break;

	case REQ_ID_SYNC_LOC_RETRIEVAL:
	{
		SysLog(NID_LOC, "REQ_ID_SYNC_LOC_RETRIEVAL.");
		SysTryReturnVoidResult(NID_LOC, pArgs, E_INVALID_ARG, "[E_INVALID_ARG] Null argument encountered. Ignored.");
		_SyncLocationRequestInfo* pSyncLocRequestInfo = null;
		SysTryCatch(NID_LOC, pArgs->GetCount() == ARRAY_LIST_CAPACITY, , E_INVALID_ARG, "[E_INVALID_ARG] Invalid argument encountered. Ignored.");
		pSyncLocRequestInfo = static_cast< _SyncLocationRequestInfo* >(pArgs->GetAt(0));
		SysTryCatch(NID_LOC, pSyncLocRequestInfo, , E_INVALID_ARG, "[E_INVALID_ARG] Invalid argument encountered. Ignored.");

		AddToSyncLocationRequestInfoList(*pSyncLocRequestInfo);
		pArgs->RemoveAt(0);
	}
	break;

	case REQ_ID_GET_LAST_LOCATION:
	{
		SysLog(NID_LOC, "REQ_ID_GET_LAST_LOCATION");
		SysTryReturnVoidResult(NID_LOC, pArgs, E_INVALID_ARG, "[E_INVALID_ARG] Null argument encountered. Ignored.");

		Location* pLocation = static_cast< Location* >(pArgs->GetAt(0));
		Monitor* pMonitor = static_cast< Monitor* >(pArgs->GetAt(1));
		SysAssertf(pLocation != null && pMonitor != null, "Invalid request has been made on the location manager.");
		if (pMonitor != null)
		{
			pMonitor->Enter();
			if (pLocation != null)
			{
				*pLocation = GetRecentLocationAvailable();
			}
			pMonitor->Notify();
			pMonitor->Exit();
		}
		pArgs->RemoveAt(1);
		pArgs->RemoveAt(0);
	}
	break;

	case REQ_ID_UPDATE_INTERVAL:
	{
		const int ARRAY_LIST_LENGTH = 2;

		SysLog(NID_LOC, "REQ_ID_UPDATE_INTERVAL");
		SysTryReturnVoidResult(NID_LOC, pArgs, E_INVALID_ARG, "[E_INVALID_ARG] Null argument encountered. Ignored.");
		SysTryCatch(NID_LOC, pArgs->GetCount() == ARRAY_LIST_LENGTH, pArgs->RemoveAll(true), E_INVALID_ARG, "[E_INVALID_ARG] Invalid argument encountered. Ignored.");

		Integer* pReqId = null;
		pReqId = static_cast< Integer* >(pArgs->GetAt(0));
		SysTryCatch(NID_LOC, pReqId, , E_INVALID_ARG, "[E_INVALID_ARG] Invalid argument encountered. Ignored.");

		Integer* pInterval = null;
		pInterval = static_cast< Integer* >(pArgs->GetAt(1));
		SysTryCatch(NID_LOC, pInterval, , E_INVALID_ARG, "[E_INVALID_ARG] Invalid argument encountered. Ignored.");

		UpdateLocRequestInfoList(static_cast< long >(pReqId->ToInt()), pInterval->ToInt());
	}
	break;

	}

	if (pArgs)
	{
		pArgs->RemoveAll(true);
		delete pArgs;
	}

	return;

CATCH:
	pArgs->RemoveAll(true);
	delete pArgs;
}

void
_LocationManager::OnTimerExpired(Tizen::Base::Runtime::Timer& timer)
{
	if (__pLocUpdateTimer->Equals(timer))
	{
		__timerTicks++;
		SysLog(NID_LOC, "LocationManager update timer expired. Timer Tick value is (%d).", __timerTicks);
		result r = E_SUCCESS;

		switch (__locMethodRequested)
		{
		case LOC_METHOD_REQUESTED_GPS:
		{
			r = GetLocation(LOCATIONS_METHOD_GPS);
			SysTryLog(NID_LOC, r == E_SUCCESS, "[E_SYSTEM] Failed to obtain the GPS location information");
			if (IsFailed(r))
			{
				SendUserEvent(REQ_ID_RESTART_LOC_UPDATES, null);
			}
		}
		break;

		case LOC_METHOD_REQUESTED_WPS:
		{
			r = GetLocation(LOCATIONS_METHOD_WPS);
			SysTryLog(NID_LOC, r == E_SUCCESS, "[E_SYSTEM] Failed to obtain the WPS location information");
			if (IsFailed(r))
			{
				SendUserEvent(REQ_ID_RESTART_LOC_UPDATES, null);
			}
		}
		break;

		case LOC_METHOD_REQUESTED_ALL:
		{
			if (__wpsHandler.serviceState == LOCATIONS_SERVICE_ENABLED)
			{
				r = GetLocation(LOCATIONS_METHOD_WPS);
				SysTryLog(NID_LOC, r == E_SUCCESS, "[E_SYSTEM] Failed to obtain the WPS location information");
			}
			else
			{
				SysLog(NID_LOC, "WPS Location not available at the Native side.");
			}

			if (__gpsHandler.serviceState == LOCATIONS_SERVICE_ENABLED)
			{
				r = GetLocation(LOCATIONS_METHOD_GPS);
				SysTryLog(NID_LOC, r == E_SUCCESS, "[E_SYSTEM] Failed to obtain the GPS location information");
			}
			else
			{
				SysLog(NID_LOC, "GPS Location not available at the Native side.");
			}
		}
		break;

		case LOC_METHOD_REQUESTED_NONE:
		// follow through
		default:
			SysLog(NID_LOC, "Timer expired when no location update is called.");
			return;
		}

		__pLocUpdateTimer->Start(__timerInterval * 1000);
		SendLocationCallbacks();
	}

	return;
}

bool
_LocationManager::SatelliteInfoUpdated(unsigned int azimuth, unsigned int elevation, unsigned int prn, int snr, bool is_active, void* user_data)
{

	if (user_data == null)
	{
		SysLog(NID_LOC, "User data Null. Return.");
		return true;
	}

	String* pSatInfo = static_cast< String* >(user_data);
	SysLog(NID_LOC, "GPS Position Satellite Info: SatID (%d), Used (%d), Elevation (%d), Azimuth (%d), Snr (%d).", prn, is_active, elevation, azimuth, snr);

	pSatInfo->Append(static_cast< int >(prn));
	pSatInfo->Append(", ");
	pSatInfo->Append(static_cast< int >(elevation));
	pSatInfo->Append(", ");
	pSatInfo->Append(static_cast< int >(azimuth));
	pSatInfo->Append(", ");
	pSatInfo->Append(snr);
	pSatInfo->Append(", ");
	pSatInfo->Append(is_active);
	pSatInfo->Append("; ");

	return true;
}

void
_LocationManager::GpsServiceUpdateCallback(location_service_state_e state, void* user_data)
{
	SysLog(NID_LOC, "Updated State is (%d).", state);
	if (user_data == null)
	{
		SysLog(NID_LOC, "User data is null. Return");
		return;
	}

	_LocationManager* pThis = static_cast< _LocationManager* >(user_data);
	pThis->__gpsHandler.serviceState = state;
}

void
_LocationManager::WpsServiceUpdateCallback(location_service_state_e state, void* user_data)
{
	SysLog(NID_LOC, "Updated State is (%d).", state);
	if (user_data == null)
	{
		SysLog(NID_LOC, "User data is null. Return");
		return;
	}

	_LocationManager* pThis = static_cast< _LocationManager* >(user_data);
	pThis->__wpsHandler.serviceState = state;
}

void
_LocationManager::InitLocationManager(void)
{
	SysLog(NID_LOC, "Creating the first location manager instance.");

	unique_ptr< _LocationManager > pLocMgr(new (std::nothrow) _LocationManager());
	SysTryReturnVoidResult(NID_LOC, pLocMgr, E_OUT_OF_MEMORY, "[%s] Memory allocation failed.", GetErrorMessage(E_OUT_OF_MEMORY));
	result r = pLocMgr->Construct();
	SysTryReturnVoidResult(NID_LOC, r == E_SUCCESS, r, "[%s] Failed to construct the Location Manager. Propagating.", GetErrorMessage(r));

	r = pLocMgr->Start();
	SysTryReturnVoidResult(NID_LOC, r == E_SUCCESS, r, "[%s] Failed to start the Location Manager. Propagating.", GetErrorMessage(r));

	r = pLocMgr->WaitThreadStart();
	SysTryReturnVoidResult(NID_LOC, r == E_SUCCESS, r, "[%s] Failed to WaitThreadStart. Propagating.", GetErrorMessage(r));

	__pUniqueInstance = pLocMgr.release();
	std::atexit(DestroyLocationManager);
}

void
_LocationManager::DestroyLocationManager(void)
{
	delete __pUniqueInstance;
}

result
_LocationManager::WaitThreadStart()
{
	result r = __pInitMonitor->Enter();
	SysTryReturnResult(NID_LOC, r == E_SUCCESS, r, "[%s] Failed to Enter Monitor. Propagating.", GetErrorMessage(r));
	r = __pInitMonitor->Wait();
	SysTryReturnResult(NID_LOC, r == E_SUCCESS, r, "[%s] Failed to Wait Monitor. Propagating.", GetErrorMessage(r));
	r = __pInitMonitor->Exit();
	SysTryReturnResult(NID_LOC, r == E_SUCCESS, r, "[%s] Failed to Exit Monitor. Propagating.", GetErrorMessage(r));

	return E_SUCCESS;
}
}}