# -*- coding: utf-8 -*-
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#  $Id: svn_id $
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#  Asyncio implementation of YCounter
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"""
Yoctopuce library: Asyncio implementation of YCounter
version: PATCH_WITH_VERSION
requires: yocto_api_aio
provides: YCounter
"""
from __future__ import annotations

import sys

# On MicroPython, code below will be wiped out at compile time
if sys.implementation.name != "micropython":
    # In CPython, enable edit-time type checking, including Final declaration
    from typing import Any, Union
    from collections.abc import Callable, Awaitable
    const = lambda obj: obj
    _IS_MICROPYTHON = False
else:
    # In our micropython VM, common generic types are global built-ins
    # Others such as TypeVar should be avoided when using micropython,
    # as they produce overhead in runtime code
    # Final is translated into const() expressions before compilation
    _IS_MICROPYTHON: Final[bool] = True # noqa

from .yocto_api_aio import (
    YAPIContext, YAPI, YAPI_Exception, HwId, hwid2str, YFunction, YSensor, YMeasure
)

# --- (YCounter class start)
if not _IS_MICROPYTHON:
    # For CPython, use strongly typed callback types
    try:
        YCounterValueCallback = Union[Callable[['YCounter', str], Any], None]
        YCounterTimedReportCallback = Union[Callable[['YCounter', YMeasure], Any], None]
    except TypeError:
        YCounterValueCallback = Union[Callable, Awaitable]
        YCounterTimedReportCallback = Union[Callable, Awaitable]

# noinspection PyProtectedMember
class YCounter(YSensor):
    """
    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.

    """
    # --- (end of YCounter class start)
    if not _IS_MICROPYTHON:
        # --- (YCounter return codes)
        pass
        # --- (end of YCounter return codes)

    # --- (YCounter attributes declaration)
    _valueCallback: YCounterValueCallback
    _timedReportCallback: YCounterTimedReportCallback
    # --- (end of YCounter attributes declaration)

    def __init__(self, yctx: YAPIContext, func: str):
        super().__init__(yctx, 'Counter', func)
        # --- (YCounter constructor)
        # --- (end of YCounter constructor)

    # --- (YCounter implementation)
    @classmethod
    def FindCounter(cls, func: str) -> YCounter:
        """
        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 YCounter.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.
        """
        return cls.FindCounterInContext(YAPI, func)

    @classmethod
    def FindCounterInContext(cls, yctx: YAPIContext, func: str) -> YCounter:
        """
        Retrieves a counter for a given identifier in a YAPI context.
        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 YCounter.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.

        @param yctx : a YAPI context
        @param func : a string that uniquely characterizes the counter, for instance
                MyDevice.counter.

        @return a YCounter object allowing you to drive the counter.
        """
        obj: Union[YCounter, None] = yctx._findInCache('Counter', func)
        if obj:
            return obj
        return YCounter(yctx, func)

    @classmethod
    def FirstCounter(cls) -> Union[YCounter, None]:
        """
        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 None pointer
                if there are none.
        """
        return cls.FirstCounterInContext(YAPI)

    @classmethod
    def FirstCounterInContext(cls, yctx: YAPIContext) -> Union[YCounter, None]:
        """
        Starts the enumeration of gcounters currently accessible.
        Use the method YCounter.nextCounter() to iterate on
        next gcounters.

        @param yctx : a YAPI context.

        @return a pointer to a YCounter object, corresponding to
                the first counter currently online, or a None pointer
                if there are none.
        """
        hwid: Union[HwId, None] = yctx._firstHwId('Counter')
        if hwid:
            return cls.FindCounterInContext(yctx, hwid2str(hwid))
        return None

    def nextCounter(self) -> Union[YCounter, None]:
        """
        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 None pointer
                if there are no more gcounters to enumerate.
        """
        next_hwid: Union[HwId, None] = None
        try:
            next_hwid = self._yapi._nextHwId('Counter', self.get_hwId())
        except YAPI_Exception:
            pass
        if next_hwid:
            return self.FindCounterInContext(self._yapi, hwid2str(next_hwid))
        return None

    if not _IS_MICROPYTHON:
        async def registerValueCallback(self, callback: YCounterValueCallback) -> int:
            """
            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 None pointer as argument.

            @param callback : the callback function to call, or a None 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
            """
            return await super().registerValueCallback(callback)

    if not _IS_MICROPYTHON:
        async def registerTimedReportCallback(self, callback: YCounterTimedReportCallback) -> int:
            """
            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 None pointer as argument.

            @param callback : the callback function to call, or a None 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
            """
            return await super().registerTimedReportCallback(callback)

    # --- (end of YCounter implementation)

