/*********************************************************************
 *
 *  $Id: svn_id $
 *
 *  Declares yFindCounter(), the high-level API for Counter functions
 *
 *  - - - - - - - - - License information: - - - - - - - - -
 *
 *  Copyright (C) 2011 and beyond by Yoctopuce Sarl, Switzerland.
 *
 *  Yoctopuce Sarl (hereafter Licensor) grants to you a perpetual
 *  non-exclusive license to use, modify, copy and integrate this
 *  file into your software for the sole purpose of interfacing
 *  with Yoctopuce products.
 *
 *  You may reproduce and distribute copies of this file in
 *  source or object form, as long as the sole purpose of this
 *  code is to interface with Yoctopuce products. You must retain
 *  this notice in the distributed source file.
 *
 *  You should refer to Yoctopuce General Terms and Conditions
 *  for additional information regarding your rights and
 *  obligations.
 *
 *  THE SOFTWARE AND DOCUMENTATION ARE PROVIDED 'AS IS' WITHOUT
 *  WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING
 *  WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY, FITNESS
 *  FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO
 *  EVENT SHALL LICENSOR BE LIABLE FOR ANY INCIDENTAL, SPECIAL,
 *  INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA,
 *  COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR
 *  SERVICES, ANY CLAIMS BY THIRD PARTIES (INCLUDING BUT NOT
 *  LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
 *  CONTRIBUTION, OR OTHER SIMILAR COSTS, WHETHER ASSERTED ON THE
 *  BASIS OF CONTRACT, TORT (INCLUDING NEGLIGENCE), BREACH OF
 *  WARRANTY, OR OTHERWISE.
 *
 *********************************************************************/


#ifndef YOCTO_COUNTER_H
#define YOCTO_COUNTER_H

#include <cfloat>
#include <cmath>

#include "yocto_api.h"

#ifdef YOCTOLIB_NAMESPACE
namespace YOCTOLIB_NAMESPACE
{
#endif

//--- (YCounter return codes)
//--- (end of YCounter return codes)
//--- (YCounter yapiwrapper)
//--- (end of YCounter yapiwrapper)
//--- (YCounter definitions)
class YCounter; // forward declaration

typedef void (*YCounterValueCallback)(YCounter *func, const string& functionValue);
class YMeasure; // forward declaration
typedef void (*YCounterTimedReportCallback)(YCounter *func, YMeasure measure);
#define Y_COMMAND_INVALID               (YAPI_INVALID_STRING)
//--- (end of YCounter definitions)

//--- (YCounter declaration)
/**
 * YCounter Class: counter control interface
 *
 * The YCounter class allows you to read and configure Yoctopuce gcounters.
 * It inherits from YSensor class the core functions to read measurements,
 * to register callback functions, and to access the autonomous datalogger.
 */
class YOCTO_CLASS_EXPORT YCounter: public YSensor {
#ifdef __BORLANDC__
#pragma option push -w-8022
#endif
//--- (end of YCounter declaration)
protected:
    //--- (YCounter attributes)
    // Attributes (function value cache)
    string          _command;
    YCounterValueCallback _valueCallbackCounter;
    YCounterTimedReportCallback _timedReportCallbackCounter;

    friend YCounter *yFindCounter(const string& func);
    friend YCounter *yFirstCounter(void);

    // Function-specific method for parsing of JSON output and caching result
    virtual int     _parseAttr(YJSONObject *json_val);

    // Constructor is protected, use yFindCounter factory function to instantiate
    YCounter(const string& func);
    //--- (end of YCounter attributes)

public:
    virtual ~YCounter();
    //--- (YCounter accessors declaration)

    static const string COMMAND_INVALID;

    string              get_command(void);

    inline string       command(void)
    { return this->get_command(); }

    int             set_command(const string& newval);
    inline int      setCommand(const string& newval)
    { return this->set_command(newval); }

    /**
     * Retrieves a counter for a given identifier.
     * The identifier can be specified using several formats:
     *
     * - FunctionLogicalName
     * - ModuleSerialNumber.FunctionIdentifier
     * - ModuleSerialNumber.FunctionLogicalName
     * - ModuleLogicalName.FunctionIdentifier
     * - ModuleLogicalName.FunctionLogicalName
     *
     *
     * This function does not require that the counter is online at the time
     * it is invoked. The returned object is nevertheless valid.
     * Use the method isOnline() to test if the counter is
     * indeed online at a given time. In case of ambiguity when looking for
     * a counter by logical name, no error is notified: the first instance
     * found is returned. The search is performed first by hardware name,
     * then by logical name.
     *
     * If a call to this object's is_online() method returns FALSE although
     * you are certain that the matching device is plugged, make sure that you did
     * call registerHub() at application initialization time.
     *
     * @param func : a string that uniquely characterizes the counter, for instance
     *         MyDevice.counter.
     *
     * @return a YCounter object allowing you to drive the counter.
     */
    static YCounter*    FindCounter(string func);

    /**
     * Registers the callback function that is invoked on every change of advertised value.
     * The callback is then invoked only during the execution of ySleep or yHandleEvents.
     * This provides control over the time when the callback is triggered. For good responsiveness,
     * remember to call one of these two functions periodically. The callback is called once juste after beeing
     * registered, passing the current advertised value  of the function, provided that it is not an empty string.
     * To unregister a callback, pass a NULL pointer as argument.
     *
     * @param callback : the callback function to call, or a NULL pointer. The callback function should take two
     *         arguments: the function object of which the value has changed, and the character string describing
     *         the new advertised value.
     * @noreturn
     */
    virtual int         registerValueCallback(YCounterValueCallback callback);
    using YSensor::registerValueCallback;

    virtual int         _invokeValueCallback(string value);

    /**
     * Registers the callback function that is invoked on every periodic timed notification.
     * The callback is invoked only during the execution of ySleep or yHandleEvents.
     * This provides control over the time when the callback is triggered. For good responsiveness, remember to call
     * one of these two functions periodically. To unregister a callback, pass a NULL pointer as argument.
     *
     * @param callback : the callback function to call, or a NULL pointer. The callback function should take two
     *         arguments: the function object of which the value has changed, and an YMeasure object describing
     *         the new advertised value.
     * @noreturn
     */
    virtual int         registerTimedReportCallback(YCounterTimedReportCallback callback);
    using YSensor::registerTimedReportCallback;

    virtual int         _invokeTimedReportCallback(YMeasure value);

    virtual int         sendCommand(string command);

    /**
     * Reset the counter to zero.
     *
     * @return YAPI::SUCCESS if the call succeeds.
     *
     * On failure, throws an exception or returns a negative error code.
     */
    virtual int         zero(void);


    inline static YCounter *Find(string func)
    { return YCounter::FindCounter(func); }

    /**
     * Continues the enumeration of gcounters started using yFirstCounter().
     * Caution: You can't make any assumption about the returned gcounters order.
     * If you want to find a specific a counter, use Counter.findCounter()
     * and a hardwareID or a logical name.
     *
     * @return a pointer to a YCounter object, corresponding to
     *         a counter currently online, or a NULL pointer
     *         if there are no more gcounters to enumerate.
     */
           YCounter        *nextCounter(void);
    inline YCounter        *next(void)
    { return this->nextCounter();}

    /**
     * Starts the enumeration of gcounters currently accessible.
     * Use the method YCounter::nextCounter() to iterate on
     * next gcounters.
     *
     * @return a pointer to a YCounter object, corresponding to
     *         the first counter currently online, or a NULL pointer
     *         if there are none.
     */
           static YCounter *FirstCounter(void);
    inline static YCounter *First(void)
    { return YCounter::FirstCounter();}
#ifdef __BORLANDC__
#pragma option pop
#endif
    //--- (end of YCounter accessors declaration)
};

//--- (YCounter functions declaration)

/**
 * Retrieves a counter for a given identifier.
 * The identifier can be specified using several formats:
 *
 * - FunctionLogicalName
 * - ModuleSerialNumber.FunctionIdentifier
 * - ModuleSerialNumber.FunctionLogicalName
 * - ModuleLogicalName.FunctionIdentifier
 * - ModuleLogicalName.FunctionLogicalName
 *
 *
 * This function does not require that the counter is online at the time
 * it is invoked. The returned object is nevertheless valid.
 * Use the method isOnline() to test if the counter is
 * indeed online at a given time. In case of ambiguity when looking for
 * a counter by logical name, no error is notified: the first instance
 * found is returned. The search is performed first by hardware name,
 * then by logical name.
 *
 * If a call to this object's is_online() method returns FALSE although
 * you are certain that the matching device is plugged, make sure that you did
 * call registerHub() at application initialization time.
 *
 * @param func : a string that uniquely characterizes the counter, for instance
 *         MyDevice.counter.
 *
 * @return a YCounter object allowing you to drive the counter.
 */
inline YCounter *yFindCounter(const string& func)
{ return YCounter::FindCounter(func);}
/**
 * Starts the enumeration of gcounters currently accessible.
 * Use the method YCounter::nextCounter() to iterate on
 * next gcounters.
 *
 * @return a pointer to a YCounter object, corresponding to
 *         the first counter currently online, or a NULL pointer
 *         if there are none.
 */
inline YCounter *yFirstCounter(void)
{ return YCounter::FirstCounter();}

//--- (end of YCounter functions declaration)

#ifdef YOCTOLIB_NAMESPACE
// end of namespace definition
}
#endif

#endif
