/*********************************************************************
 *
 *  $Id: svn_id $
 *
 *  Declares yFindAltitude(), the high-level API for Altitude functions
 *
 *  - - - - - - - - - License information: - - - - - - - - -
 *
 *  Copyright (C) 2011 and beyond by Yoctopuce Sarl, Switzerland.
 *
 *  Yoctopuce Sarl (hereafter Licensor) grants to you a perpetual
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 *  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
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 *
 *  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
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#ifndef YOCTO_ALTITUDE_H
#define YOCTO_ALTITUDE_H

#include <cfloat>
#include <cmath>

#include "yocto_api.h"

#ifdef YOCTOLIB_NAMESPACE
namespace YOCTOLIB_NAMESPACE
{
#endif

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

typedef void (*YAltitudeValueCallback)(YAltitude *func, const string& functionValue);
class YMeasure; // forward declaration
typedef void (*YAltitudeTimedReportCallback)(YAltitude *func, YMeasure measure);
#define Y_QNH_INVALID                   (YAPI_INVALID_DOUBLE)
#define Y_TECHNOLOGY_INVALID            (YAPI_INVALID_STRING)
//--- (end of YAltitude definitions)

//--- (YAltitude declaration)
/**
 * YAltitude Class: altimeter control interface, available for instance in the Yocto-Altimeter-V2 or
 * the Yocto-GPS-V2
 *
 * The YAltitude class allows you to read and configure Yoctopuce altimeters.
 * It inherits from YSensor class the core functions to read measurements,
 * to register callback functions, and to access the autonomous datalogger.
 * This class adds the ability to configure the barometric pressure adjusted to
 * sea level (QNH) for barometric sensors.
 */
class YOCTO_CLASS_EXPORT YAltitude: public YSensor {
#ifdef __BORLANDC__
#pragma option push -w-8022
#endif
//--- (end of YAltitude declaration)
protected:
    //--- (YAltitude attributes)
    // Attributes (function value cache)
    double          _qnh;
    string          _technology;
    YAltitudeValueCallback _valueCallbackAltitude;
    YAltitudeTimedReportCallback _timedReportCallbackAltitude;

    friend YAltitude *yFindAltitude(const string& func);
    friend YAltitude *yFirstAltitude(void);

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

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

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

    static const double QNH_INVALID;
    static const string TECHNOLOGY_INVALID;

    /**
     * Changes the current estimated altitude. This allows one to compensate for
     * ambient pressure variations and to work in relative mode.
     * Remember to call the saveToFlash()
     * method of the module if the modification must be kept.
     *
     * @param newval : a floating point number corresponding to the current estimated altitude
     *
     * @return YAPI::SUCCESS if the call succeeds.
     *
     * On failure, throws an exception or returns a negative error code.
     */
    int             set_currentValue(double newval);
    inline int      setCurrentValue(double newval)
    { return this->set_currentValue(newval); }

    /**
     * Changes the barometric pressure adjusted to sea level used to compute
     * the altitude (QNH). This enables you to compensate for atmospheric pressure
     * changes due to weather conditions. Applicable to barometric altimeters only.
     * Remember to call the saveToFlash()
     * method of the module if the modification must be kept.
     *
     * @param newval : a floating point number corresponding to the barometric pressure adjusted to sea
     * level used to compute
     *         the altitude (QNH)
     *
     * @return YAPI::SUCCESS if the call succeeds.
     *
     * On failure, throws an exception or returns a negative error code.
     */
    int             set_qnh(double newval);
    inline int      setQnh(double newval)
    { return this->set_qnh(newval); }

    /**
     * Returns the barometric pressure adjusted to sea level used to compute
     * the altitude (QNH). Applicable to barometric altimeters only.
     *
     * @return a floating point number corresponding to the barometric pressure adjusted to sea level used to compute
     *         the altitude (QNH)
     *
     * On failure, throws an exception or returns YAltitude::QNH_INVALID.
     */
    double              get_qnh(void);

    inline double       qnh(void)
    { return this->get_qnh(); }

    /**
     * Returns the technology used by the sesnor to compute
     * altitude. Possibles values are  "barometric" and "gps"
     *
     * @return a string corresponding to the technology used by the sesnor to compute
     *         altitude
     *
     * On failure, throws an exception or returns YAltitude::TECHNOLOGY_INVALID.
     */
    string              get_technology(void);

    inline string       technology(void)
    { return this->get_technology(); }

    /**
     * Retrieves an altimeter 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 altimeter is online at the time
     * it is invoked. The returned object is nevertheless valid.
     * Use the method isOnline() to test if the altimeter is
     * indeed online at a given time. In case of ambiguity when looking for
     * an altimeter 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 altimeter, for instance
     *         YALTIMK2.altitude.
     *
     * @return a YAltitude object allowing you to drive the altimeter.
     */
    static YAltitude*   FindAltitude(string func);

    /**
     * Registers the callback function that is invoked on every change of advertised value.
     * The callback is called once when it is registered, passing the current advertised value
     * of the function, provided that it is not an empty string.
     * 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. 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(YAltitudeValueCallback 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(YAltitudeTimedReportCallback callback);
    using YSensor::registerTimedReportCallback;

    virtual int         _invokeTimedReportCallback(YMeasure value);


    inline static YAltitude *Find(string func)
    { return YAltitude::FindAltitude(func); }

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

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

//--- (YAltitude functions declaration)

/**
 * Retrieves an altimeter 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 altimeter is online at the time
 * it is invoked. The returned object is nevertheless valid.
 * Use the method isOnline() to test if the altimeter is
 * indeed online at a given time. In case of ambiguity when looking for
 * an altimeter 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 altimeter, for instance
 *         YALTIMK2.altitude.
 *
 * @return a YAltitude object allowing you to drive the altimeter.
 */
inline YAltitude *yFindAltitude(const string& func)
{ return YAltitude::FindAltitude(func);}
/**
 * Starts the enumeration of altimeters currently accessible.
 * Use the method YAltitude::nextAltitude() to iterate on
 * next altimeters.
 *
 * @return a pointer to a YAltitude object, corresponding to
 *         the first altimeter currently online, or a NULL pointer
 *         if there are none.
 */
inline YAltitude *yFirstAltitude(void)
{ return YAltitude::FirstAltitude();}

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

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

#endif
