// mqttclient.h :
//
// https://mosquitto.org/man/mosquitto-8.html

#if !defined(AGD_MQTTCLIENT_H__36D28DC5_D30B_43A6_B6EE_84BF95E02490__INCLUDED_)
#define AGD_MQTTCLIENT_H__36D28DC5_D30B_43A6_B6EE_84BF95E02490__INCLUDED_

#include <string.h>
#ifndef _LIBBUILD
#include <gfa/svc/mqttcl/mqttmsg.h>
#include <gfa/svc/common/processclock.h>
#else	//	_LIBBUILD
#include "mqttmsg.h"
#include "processclock.h"
#endif	//	_LIBBUILD

#ifdef __cplusplus

/////////////////////////////////////////////////////////////////////////////
// mqttclient.h - Declarations:
/////////////////////////////////////////////////////////////////////////////

typedef enum _MQTT_NOTIFICATION_EVENTS
{
	NEVT_Connect			= 0x0001,
	NEVT_Connect_With_Flags	= 0x0002,
	NEVT_Disconnect			= 0x0004,
	NEVT_Subscribe			= 0x0008,
	NEVT_Unsubscribe		= 0x0010,
	NEVT_Publish			= 0x0020,
	NEVT_Message			= 0x0040,
	NEVT_Log				= 0x0080,
	NEVT_Error				= 0x0100
}MQTT_NOTIFICATION_EVENTS, *LPMQTT_NOTIFICATION_EVENTS;
typedef const MQTT_NOTIFICATION_EVENTS *LPCMQTT_NOTIFICATION_EVENTS;

/////////////////////////////////////////////////////////////////////////////

typedef struct _MQTT_EVENT_CONNECT
{
	int rc;
	int flags;
}MQTT_EVENT_CONNECT, *LPMQTT_EVENT_CONNECT;
typedef const MQTT_EVENT_CONNECT *LPCMQTT_EVENT_CONNECT;

/////////////////////////////////////////////////////////////////////////////

typedef struct _MQTT_EVENT_SUBSCRIBE
{
	int mid;
	int qos_count;
	const int *granted_qos;
}MQTT_EVENT_SUBSCRIBE, *LPMQTT_EVENT_SUBSCRIBE;
typedef const MQTT_EVENT_SUBSCRIBE *LPCMQTT_EVENT_SUBSCRIBE;

/////////////////////////////////////////////////////////////////////////////

typedef struct _MQTT_EVENT_PUBLISH
{
	int mid;
}MQTT_EVENT_PUBLISH, *LPMQTT_EVENT_PUBLISH;
typedef const MQTT_EVENT_PUBLISH *LPCMQTT_EVENT_PUBLISH;

/////////////////////////////////////////////////////////////////////////////

typedef struct _MQTT_EVENT_MESSAGE
{
	const CMqttMessage *msg;
}MQTT_EVENT_MESSAGE, *LPMQTT_EVENT_MESSAGE;
typedef const MQTT_EVENT_MESSAGE *LPCMQTT_EVENT_MESSAGE;

/////////////////////////////////////////////////////////////////////////////

typedef struct _MQTT_EVENT_LOG
{
	int level;
	const char *str;
}MQTT_EVENT_LOG, *LPMQTT_EVENT_LOG;
typedef const MQTT_EVENT_LOG *LPCMQTT_EVENT_LOG;

/////////////////////////////////////////////////////////////////////////////

typedef struct _MQTT_GENERIC_NOTIFICATION
{
	_MQTT_GENERIC_NOTIFICATION(void)
	{
#pragma GCC diagnostic push
#if __GNUC__ >= 8
#pragma GCC diagnostic ignored "-Wclass-memaccess"
#endif
		memset(this, 0, sizeof(*this));
#pragma GCC diagnostic pop
	}
	MQTT_NOTIFICATION_EVENTS evt;
	union
	{
		MQTT_EVENT_CONNECT		con;
		MQTT_EVENT_SUBSCRIBE	sub;
		MQTT_EVENT_PUBLISH		pub;
		MQTT_EVENT_MESSAGE		msg;
		MQTT_EVENT_LOG			log;
	};
}MQTT_GENERIC_NOTIFICATION, *LPMQTT_GENERIC_NOTIFICATION;
typedef const MQTT_GENERIC_NOTIFICATION *LPCMQTT_GENERIC_NOTIFICATION;

/////////////////////////////////////////////////////////////////////////////

typedef void (*PFN_MQTT_EVENTS_CALLBACK)(LPCMQTT_GENERIC_NOTIFICATION, void*);

/////////////////////////////////////////////////////////////////////////////

class CMqttClient : public mosqpp::mosquittopp
{
public:
	CMqttClient(const char *id);
	virtual ~CMqttClient(void);

	/////////////////////////////////////////////////////////////////////////
	//
	
	static int Init(void);
	static int Cleanup(void);
	
	int publish(CMqttMessage *pMsg);

	CMqttMessage* PopRcvMsg(void);
	void PushRcvMsg(CMqttMessage *pMsg);
	CMqttMessage* PopSndMsg(void);
	void PushSndMsg(CMqttMessage *pMsg);
	
	CMqttMessageQueue& GetMsgQueueRcv(void) {
		return m_rcvMsg;}
	CMqttMessageQueue& GetMsgQueueSnd(void) {
		return m_sndMsg;}
	
	void SetClientEventCallback(PFN_MQTT_EVENTS_CALLBACK pfnEvtCallback, uint32_t evtMask, void *pUserParam)
	{
		m_pEvtCallback	= pfnEvtCallback;
		m_evtMask		= evtMask;
		m_pUserParam	= pUserParam;
	}
	
	int timed_loop(pc_time64_t nLoopTime);
	bool TimedLoop(pc_time64_t nLoopTime, int &rnErr, bool &rbReconnect, bool &rbConnPending, bool &rbIntr, std::string &strErr);
	
	static bool EvalError(int nErr, bool &rbReconnect, bool &rbConnPending, bool &rbIntr, std::string &strErr);

	/////////////////////////////////////////////////////////////////////////
	//

    virtual void on_connect(int rc);
    virtual void on_connect_with_flags(int rc, int flags);
    virtual void on_disconnect(int rc);
    virtual void on_subscribe(int mid, int qos_count, const int *granted_qos);
    virtual void on_unsubscribe(int mid);
    virtual void on_publish(int mid);
    virtual void on_message(const struct mosquitto_message *message);
    virtual void on_log(int level, const char *str);
    virtual void on_error(void);

private:
    CProcessClock m_pc;
	CMqttMessageQueue m_rcvMsg;
	CMqttMessageQueue m_sndMsg;
	PFN_MQTT_EVENTS_CALLBACK m_pEvtCallback;
	uint32_t m_evtMask;
	void *m_pUserParam;
};

/////////////////////////////////////////////////////////////////////////////
#endif	//	__cplusplus
#endif	//	!defined(AGD_MQTTCLIENT_H__36D28DC5_D30B_43A6_B6EE_84BF95E02490__INCLUDED_)