# -*- coding: utf-8 -*-
# ********************************************************************
#
#  $Id: yocto_voc.py 38899 2019-12-20 17:21:03Z mvuilleu $
#
#  Implements yFindVoc(), the high-level API for Voc functions
#
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__docformat__ = 'restructuredtext en'
from yocto_api import *


#--- (YVoc class start)
#noinspection PyProtectedMember
class YVoc(YSensor):
    """
    The YVoc class allows you to read and configure Yoctopuce Volatile Organic Compound sensors.
    It inherits from YSensor class the core functions to read measurements,
    to register callback functions, and to access the autonomous datalogger.

    """
    #--- (end of YVoc class start)
    #--- (YVoc return codes)
    #--- (end of YVoc return codes)
    #--- (YVoc dlldef)
    #--- (end of YVoc dlldef)
    #--- (YVoc yapiwrapper)
    #--- (end of YVoc yapiwrapper)
    #--- (YVoc definitions)
    #--- (end of YVoc definitions)

    def __init__(self, func):
        super(YVoc, self).__init__(func)
        self._className = 'Voc'
        #--- (YVoc attributes)
        self._callback = None
        #--- (end of YVoc attributes)

    #--- (YVoc implementation)
    def _parseAttr(self, json_val):
        super(YVoc, self)._parseAttr(json_val)

    @staticmethod
    def FindVoc(func):
        """
        Retrieves a Volatile Organic Compound sensor for a given identifier.
        The identifier can be specified using several formats:
        <ul>
        <li>FunctionLogicalName</li>
        <li>ModuleSerialNumber.FunctionIdentifier</li>
        <li>ModuleSerialNumber.FunctionLogicalName</li>
        <li>ModuleLogicalName.FunctionIdentifier</li>
        <li>ModuleLogicalName.FunctionLogicalName</li>
        </ul>

        This function does not require that the Volatile Organic Compound sensor is online at the time
        it is invoked. The returned object is nevertheless valid.
        Use the method YVoc.isOnline() to test if the Volatile Organic Compound sensor is
        indeed online at a given time. In case of ambiguity when looking for
        a Volatile Organic Compound sensor 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 Volatile Organic Compound sensor, for instance
                YVOCMK03.voc.

        @return a YVoc object allowing you to drive the Volatile Organic Compound sensor.
        """
        # obj
        obj = YFunction._FindFromCache("Voc", func)
        if obj is None:
            obj = YVoc(func)
            YFunction._AddToCache("Voc", func, obj)
        return obj

    def nextVoc(self):
        """
        Continues the enumeration of Volatile Organic Compound sensors started using yFirstVoc().
        Caution: You can't make any assumption about the returned Volatile Organic Compound sensors order.
        If you want to find a specific a Volatile Organic Compound sensor, use Voc.findVoc()
        and a hardwareID or a logical name.

        @return a pointer to a YVoc object, corresponding to
                a Volatile Organic Compound sensor currently online, or a None pointer
                if there are no more Volatile Organic Compound sensors to enumerate.
        """
        hwidRef = YRefParam()
        if YAPI.YISERR(self._nextFunction(hwidRef)):
            return None
        if hwidRef.value == "":
            return None
        return YVoc.FindVoc(hwidRef.value)

#--- (end of YVoc implementation)

#--- (YVoc functions)

    @staticmethod
    def FirstVoc():
        """
        Starts the enumeration of Volatile Organic Compound sensors currently accessible.
        Use the method YVoc.nextVoc() to iterate on
        next Volatile Organic Compound sensors.

        @return a pointer to a YVoc object, corresponding to
                the first Volatile Organic Compound sensor 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("Voc", 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 YVoc.FindVoc(serialRef.value + "." + funcIdRef.value)

#--- (end of YVoc functions)
