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


#--- (YHubPort class start)
#noinspection PyProtectedMember
class YHubPort(YFunction):
    """
    The YHubPort class provides control over the power supply for slave ports
    on a YoctoHub. It provide information about the device connected to it.
    The logical name of a YHubPort is always automatically set to the
    unique serial number of the Yoctopuce device connected to it.

    """
    #--- (end of YHubPort class start)
    #--- (YHubPort return codes)
    #--- (end of YHubPort return codes)
    #--- (YHubPort dlldef)
    #--- (end of YHubPort dlldef)
    #--- (YHubPort yapiwrapper)
    #--- (end of YHubPort yapiwrapper)
    #--- (YHubPort definitions)
    BAUDRATE_INVALID = YAPI.INVALID_UINT
    ENABLED_FALSE = 0
    ENABLED_TRUE = 1
    ENABLED_INVALID = -1
    PORTSTATE_OFF = 0
    PORTSTATE_OVRLD = 1
    PORTSTATE_ON = 2
    PORTSTATE_RUN = 3
    PORTSTATE_PROG = 4
    PORTSTATE_INVALID = -1
    #--- (end of YHubPort definitions)

    def __init__(self, func):
        super(YHubPort, self).__init__(func)
        self._className = 'HubPort'
        #--- (YHubPort attributes)
        self._callback = None
        self._enabled = YHubPort.ENABLED_INVALID
        self._portState = YHubPort.PORTSTATE_INVALID
        self._baudRate = YHubPort.BAUDRATE_INVALID
        #--- (end of YHubPort attributes)

    #--- (YHubPort implementation)
    def _parseAttr(self, json_val):
        if json_val.has("enabled"):
            self._enabled = json_val.getInt("enabled") > 0
        if json_val.has("portState"):
            self._portState = json_val.getInt("portState")
        if json_val.has("baudRate"):
            self._baudRate = json_val.getInt("baudRate")
        super(YHubPort, self)._parseAttr(json_val)

    def get_enabled(self):
        """
        Returns true if the YoctoHub port is powered, false otherwise.

        @return either YHubPort.ENABLED_FALSE or YHubPort.ENABLED_TRUE, according to true if the YoctoHub
        port is powered, false otherwise

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

    def set_enabled(self, newval):
        """
        Changes the activation of the YoctoHub port. If the port is enabled, the
        connected module is powered. Otherwise, port power is shut down.

        @param newval : either YHubPort.ENABLED_FALSE or YHubPort.ENABLED_TRUE, according to the activation
        of the YoctoHub port

        @return YAPI.SUCCESS if the call succeeds.

        On failure, throws an exception or returns a negative error code.
        """
        rest_val = "1" if newval > 0 else "0"
        return self._setAttr("enabled", rest_val)

    def get_portState(self):
        """
        Returns the current state of the YoctoHub port.

        @return a value among YHubPort.PORTSTATE_OFF, YHubPort.PORTSTATE_OVRLD, YHubPort.PORTSTATE_ON,
        YHubPort.PORTSTATE_RUN and YHubPort.PORTSTATE_PROG corresponding to the current state of the YoctoHub port

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

    def get_baudRate(self):
        """
        Returns the current baud rate used by this YoctoHub port, in kbps.
        The default value is 1000 kbps, but a slower rate may be used if communication
        problems are encountered.

        @return an integer corresponding to the current baud rate used by this YoctoHub port, in kbps

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

    @staticmethod
    def FindHubPort(func):
        """
        Retrieves a YoctoHub slave port 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 YoctoHub slave port is online at the time
        it is invoked. The returned object is nevertheless valid.
        Use the method YHubPort.isOnline() to test if the YoctoHub slave port is
        indeed online at a given time. In case of ambiguity when looking for
        a YoctoHub slave port 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 YoctoHub slave port, for instance
                YHUBETH1.hubPort1.

        @return a YHubPort object allowing you to drive the YoctoHub slave port.
        """
        # obj
        obj = YFunction._FindFromCache("HubPort", func)
        if obj is None:
            obj = YHubPort(func)
            YFunction._AddToCache("HubPort", func, obj)
        return obj

    def nextHubPort(self):
        """
        Continues the enumeration of YoctoHub slave ports started using yFirstHubPort().
        Caution: You can't make any assumption about the returned YoctoHub slave ports order.
        If you want to find a specific a YoctoHub slave port, use HubPort.findHubPort()
        and a hardwareID or a logical name.

        @return a pointer to a YHubPort object, corresponding to
                a YoctoHub slave port currently online, or a None pointer
                if there are no more YoctoHub slave ports to enumerate.
        """
        hwidRef = YRefParam()
        if YAPI.YISERR(self._nextFunction(hwidRef)):
            return None
        if hwidRef.value == "":
            return None
        return YHubPort.FindHubPort(hwidRef.value)

#--- (end of YHubPort implementation)

#--- (YHubPort functions)

    @staticmethod
    def FirstHubPort():
        """
        Starts the enumeration of YoctoHub slave ports currently accessible.
        Use the method YHubPort.nextHubPort() to iterate on
        next YoctoHub slave ports.

        @return a pointer to a YHubPort object, corresponding to
                the first YoctoHub slave port 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("HubPort", 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 YHubPort.FindHubPort(serialRef.value + "." + funcIdRef.value)

#--- (end of YHubPort functions)
