/*
  Offscreen Android Views library for Qt

  Author:
  Vyacheslav O. Koscheev <vok1980@gmail.com>

  Distrbuted under The BSD License

  Copyright (c) 2015, DoubleGIS, LLC.
  All rights reserved.

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions are met:

  * Redistributions of source code must retain the above copyright notice,
	this list of conditions and the following disclaimer.
  * Redistributions in binary form must reproduce the above copyright notice,
	this list of conditions and the following disclaimer in the documentation
	and/or other materials provided with the distribution.
  * Neither the name of the DoubleGIS, LLC nor the names of its contributors
	may be used to endorse or promote products derived from this software
	without specific prior written permission.

  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS
  BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  THE POSSIBILITY OF SUCH DAMAGE.
*/

#pragma once

#include <QtCore/QMutex>
#include <QtCore/QObject>
#include <QtCore/QTimer>
#include <QtPositioning/QGeoPositionInfo>
#include <QJniHelpers/QJniHelpers.h>
#include <QJniHelpers/IJniObjectLinker.h>



class QAndroidGmsLocationProvider: public QObject
{
	Q_OBJECT
	JNI_LINKER_DECL(QAndroidGmsLocationProvider)

public:
	enum enStatus
	{
		S_DISCONNECTED 		= 0,
		S_CONNECTED 		= 1,
		S_CONNECT_ERROR 	= 2,
		S_CONNECT_SUSPEND	= 3,
	};

	enum enPriority
	{
		PRIORITY_HIGH_ACCURACY            = 0x00000064, /// the most accurate locations available
		PRIORITY_BALANCED_POWER_ACCURACY  = 0x00000066, /// "block" level accuracy.
		PRIORITY_LOW_POWER                = 0x00000068, /// "city" level accuracy.
		PRIORITY_NO_POWER                 = 0x00000069, /// the best accuracy possible with zero additional power consumption.
	};

public:
	QAndroidGmsLocationProvider(QObject * parent = 0);
	virtual ~QAndroidGmsLocationProvider();

public slots:
	void startUpdates();
	void stopUpdates();
	virtual void requestUpdate(int timeout = 0);

private slots:
	void onApplicationStateChanged(Qt::ApplicationState state);
	void onCheckRequest(qint64 requestId);

signals:
	void statusChanged(int);
	void locationAvailable(bool);
	void locationRecieved(QGeoPositionInfo);
	void checkRequest(qint64 requestId);

public:
	static bool isAvailable(jboolean allowDialog);
	static int getGmsVersion();
	void setUpdateInterval(int reqiredInterval, int minimumInterval);
	void setPriority(enPriority priority);
	QGeoPositionInfo lastKnownPosition() const;
	void showChangeLocationMethodDialog();

private:
	void stopUpdates(qint64 requestId);
	void onStatusChanged(int status);
	void onLocationAvailable(jboolean available);
	void onLocationRecieved(const QGeoPositionInfo &location, jboolean initial, jlong requestId);

private:
	Q_DISABLE_COPY(QAndroidGmsLocationProvider)
	friend void JNICALL Java_GooglePlayServiceLocationProvider_locationRecieved(JNIEnv * env, jobject, jlong param, jobject location, jboolean initial, jlong requestId);
	friend void JNICALL Java_GooglePlayServiceLocationProvider_locationStatus(JNIEnv * env, jobject, jlong param, jint state);
	friend void JNICALL Java_GooglePlayServiceLocationProvider_locationAvailable(JNIEnv *, jobject, jlong param, jboolean available);

private:
	QGeoPositionInfo lastLocation_;
	mutable QMutex lastLocationSync_;

	int reqiredInterval_;
	int minimumInterval_;
	enPriority priority_;

	typedef std::list<jlong> RequestsColl;
	jlong regularUpdadesId_;
	RequestsColl requestUpdadesIds_;
};


