# -*- coding: utf-8 -*-
# ********************************************************************
#
#  $Id: svn_id $
#
#  Implements yFindMagnetometer(), the high-level API for Magnetometer functions
#
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__docformat__ = 'restructuredtext en'
from yocto_api import *


#--- (YMagnetometer class start)
#noinspection PyProtectedMember
class YMagnetometer(YSensor):
    """
    The YSensor class is the parent class for all Yoctopuce sensor types. It can be
    used to read the current value and unit of any sensor, read the min/max
    value, configure autonomous recording frequency and access recorded data.
    It also provides a function to register a callback invoked each time the
    observed value changes, or at a predefined interval. Using this class rather
    than a specific subclass makes it possible to create generic applications
    that work with any Yoctopuce sensor, even those that do not yet exist.
    Note: The YAnButton class is the only analog input which does not inherit
    from YSensor.

    """
    #--- (end of YMagnetometer class start)
    #--- (YMagnetometer return codes)
    #--- (end of YMagnetometer return codes)
    #--- (YMagnetometer dlldef)
    #--- (end of YMagnetometer dlldef)
    #--- (YMagnetometer yapiwrapper)
    #--- (end of YMagnetometer yapiwrapper)
    #--- (YMagnetometer definitions)
    BANDWIDTH_INVALID = YAPI.INVALID_UINT
    XVALUE_INVALID = YAPI.INVALID_DOUBLE
    YVALUE_INVALID = YAPI.INVALID_DOUBLE
    ZVALUE_INVALID = YAPI.INVALID_DOUBLE
    #--- (end of YMagnetometer definitions)

    def __init__(self, func):
        super(YMagnetometer, self).__init__(func)
        self._className = 'Magnetometer'
        #--- (YMagnetometer attributes)
        self._callback = None
        self._bandwidth = YMagnetometer.BANDWIDTH_INVALID
        self._xValue = YMagnetometer.XVALUE_INVALID
        self._yValue = YMagnetometer.YVALUE_INVALID
        self._zValue = YMagnetometer.ZVALUE_INVALID
        #--- (end of YMagnetometer attributes)

    #--- (YMagnetometer implementation)
    def _parseAttr(self, json_val):
        if json_val.has("bandwidth"):
            self._bandwidth = json_val.getInt("bandwidth")
        if json_val.has("xValue"):
            self._xValue = round(json_val.getDouble("xValue") / 65.536) / 1000.0
        if json_val.has("yValue"):
            self._yValue = round(json_val.getDouble("yValue") / 65.536) / 1000.0
        if json_val.has("zValue"):
            self._zValue = round(json_val.getDouble("zValue") / 65.536) / 1000.0
        super(YMagnetometer, self)._parseAttr(json_val)

    def get_bandwidth(self):
        """
        Returns the measure update frequency, measured in Hz.

        @return an integer corresponding to the measure update frequency, measured in Hz

        On failure, throws an exception or returns YMagnetometer.BANDWIDTH_INVALID.
        """
        # res
        if self._cacheExpiration <= YAPI.GetTickCount():
            if self.load(YAPI._yapiContext.GetCacheValidity()) != YAPI.SUCCESS:
                return YMagnetometer.BANDWIDTH_INVALID
        res = self._bandwidth
        return res

    def set_bandwidth(self, newval):
        """
        Changes the measure update frequency, measured in Hz. When the
        frequency is lower, the device performs averaging.
        Remember to call the saveToFlash()
        method of the module if the modification must be kept.

        @param newval : an integer corresponding to the measure update frequency, measured in Hz

        @return YAPI.SUCCESS if the call succeeds.

        On failure, throws an exception or returns a negative error code.
        """
        rest_val = str(newval)
        return self._setAttr("bandwidth", rest_val)

    def get_xValue(self):
        """
        Returns the X component of the magnetic field, as a floating point number.

        @return a floating point number corresponding to the X component of the magnetic field, as a
        floating point number

        On failure, throws an exception or returns YMagnetometer.XVALUE_INVALID.
        """
        # res
        if self._cacheExpiration <= YAPI.GetTickCount():
            if self.load(YAPI._yapiContext.GetCacheValidity()) != YAPI.SUCCESS:
                return YMagnetometer.XVALUE_INVALID
        res = self._xValue
        return res

    def get_yValue(self):
        """
        Returns the Y component of the magnetic field, as a floating point number.

        @return a floating point number corresponding to the Y component of the magnetic field, as a
        floating point number

        On failure, throws an exception or returns YMagnetometer.YVALUE_INVALID.
        """
        # res
        if self._cacheExpiration <= YAPI.GetTickCount():
            if self.load(YAPI._yapiContext.GetCacheValidity()) != YAPI.SUCCESS:
                return YMagnetometer.YVALUE_INVALID
        res = self._yValue
        return res

    def get_zValue(self):
        """
        Returns the Z component of the magnetic field, as a floating point number.

        @return a floating point number corresponding to the Z component of the magnetic field, as a
        floating point number

        On failure, throws an exception or returns YMagnetometer.ZVALUE_INVALID.
        """
        # res
        if self._cacheExpiration <= YAPI.GetTickCount():
            if self.load(YAPI._yapiContext.GetCacheValidity()) != YAPI.SUCCESS:
                return YMagnetometer.ZVALUE_INVALID
        res = self._zValue
        return res

    @staticmethod
    def FindMagnetometer(func):
        """
        Retrieves a magnetometer 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 magnetometer is online at the time
        it is invoked. The returned object is nevertheless valid.
        Use the method YMagnetometer.isOnline() to test if the magnetometer is
        indeed online at a given time. In case of ambiguity when looking for
        a magnetometer 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 magnetometer, for instance
                Y3DMK002.magnetometer.

        @return a YMagnetometer object allowing you to drive the magnetometer.
        """
        # obj
        obj = YFunction._FindFromCache("Magnetometer", func)
        if obj is None:
            obj = YMagnetometer(func)
            YFunction._AddToCache("Magnetometer", func, obj)
        return obj

    def nextMagnetometer(self):
        """
        Continues the enumeration of magnetometers started using yFirstMagnetometer().
        Caution: You can't make any assumption about the returned magnetometers order.
        If you want to find a specific a magnetometer, use Magnetometer.findMagnetometer()
        and a hardwareID or a logical name.

        @return a pointer to a YMagnetometer object, corresponding to
                a magnetometer currently online, or a None pointer
                if there are no more magnetometers to enumerate.
        """
        hwidRef = YRefParam()
        if YAPI.YISERR(self._nextFunction(hwidRef)):
            return None
        if hwidRef.value == "":
            return None
        return YMagnetometer.FindMagnetometer(hwidRef.value)

#--- (end of YMagnetometer implementation)

#--- (YMagnetometer functions)

    @staticmethod
    def FirstMagnetometer():
        """
        Starts the enumeration of magnetometers currently accessible.
        Use the method YMagnetometer.nextMagnetometer() to iterate on
        next magnetometers.

        @return a pointer to a YMagnetometer object, corresponding to
                the first magnetometer currently online, or a None pointer
                if there are none.
        """
        devRef = YRefParam()
        neededsizeRef = YRefParam()
        serialRef = YRefParam()
        funcIdRef = YRefParam()
        funcNameRef = YRefParam()
        funcValRef = YRefParam()
        errmsgRef = YRefParam()
        size = YAPI.C_INTSIZE
        #noinspection PyTypeChecker,PyCallingNonCallable
        p = (ctypes.c_int * 1)()
        err = YAPI.apiGetFunctionsByClass("Magnetometer", 0, p, size, neededsizeRef, errmsgRef)

        if YAPI.YISERR(err) or not neededsizeRef.value:
            return None

        if YAPI.YISERR(
                YAPI.yapiGetFunctionInfo(p[0], devRef, serialRef, funcIdRef, funcNameRef, funcValRef, errmsgRef)):
            return None

        return YMagnetometer.FindMagnetometer(serialRef.value + "." + funcIdRef.value)

#--- (end of YMagnetometer functions)
