# -*- coding: utf-8 -*-
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#  $Id: svn_id $
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#  Asyncio implementation of YCurrentLoopOutput
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"""
Yoctopuce library: Asyncio implementation of YCurrentLoopOutput
version: PATCH_WITH_VERSION
requires: yocto_api_aio
provides: YCurrentLoopOutput
"""
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, Final
    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
)

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

# noinspection PyProtectedMember
class YCurrentLoopOutput(YFunction):
    """
    The YCurrentLoopOutput class allows you to drive a 4-20mA output
    by regulating the current flowing through the current loop.
    It can also provide information about the power state of the current loop.

    """
    # --- (end of YCurrentLoopOutput class start)
    if not _IS_MICROPYTHON:
        # --- (YCurrentLoopOutput return codes)
        CURRENT_INVALID: Final[float] = YAPI.INVALID_DOUBLE
        CURRENTTRANSITION_INVALID: Final[str] = YAPI.INVALID_STRING
        CURRENTATSTARTUP_INVALID: Final[float] = YAPI.INVALID_DOUBLE
        LOOPPOWER_NOPWR: Final[int] = 0
        LOOPPOWER_LOWPWR: Final[int] = 1
        LOOPPOWER_POWEROK: Final[int] = 2
        LOOPPOWER_INVALID: Final[int] = -1
        # --- (end of YCurrentLoopOutput return codes)

    # --- (YCurrentLoopOutput attributes declaration)
    _valueCallback: YCurrentLoopOutputValueCallback
    # --- (end of YCurrentLoopOutput attributes declaration)

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

    # --- (YCurrentLoopOutput implementation)
    @classmethod
    def FindCurrentLoopOutput(cls, func: str) -> YCurrentLoopOutput:
        """
        Retrieves a 4-20mA output 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 4-20mA output is online at the time
        it is invoked. The returned object is nevertheless valid.
        Use the method YCurrentLoopOutput.isOnline() to test if the 4-20mA output is
        indeed online at a given time. In case of ambiguity when looking for
        a 4-20mA output 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 4-20mA output, for instance
                TX420MA1.currentLoopOutput.

        @return a YCurrentLoopOutput object allowing you to drive the 4-20mA output.
        """
        return cls.FindCurrentLoopOutputInContext(YAPI, func)

    @classmethod
    def FindCurrentLoopOutputInContext(cls, yctx: YAPIContext, func: str) -> YCurrentLoopOutput:
        """
        Retrieves a 4-20mA output 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 4-20mA output is online at the time
        it is invoked. The returned object is nevertheless valid.
        Use the method YCurrentLoopOutput.isOnline() to test if the 4-20mA output is
        indeed online at a given time. In case of ambiguity when looking for
        a 4-20mA output 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 4-20mA output, for instance
                TX420MA1.currentLoopOutput.

        @return a YCurrentLoopOutput object allowing you to drive the 4-20mA output.
        """
        obj: Union[YCurrentLoopOutput, None] = yctx._findInCache('CurrentLoopOutput', func)
        if obj:
            return obj
        return YCurrentLoopOutput(yctx, func)

    @classmethod
    def FirstCurrentLoopOutput(cls) -> Union[YCurrentLoopOutput, None]:
        """
        Starts the enumeration of 4-20mA outputs currently accessible.
        Use the method YCurrentLoopOutput.nextCurrentLoopOutput() to iterate on
        next 4-20mA outputs.

        @return a pointer to a YCurrentLoopOutput object, corresponding to
                the first 4-20mA output currently online, or a None pointer
                if there are none.
        """
        return cls.FirstCurrentLoopOutputInContext(YAPI)

    @classmethod
    def FirstCurrentLoopOutputInContext(cls, yctx: YAPIContext) -> Union[YCurrentLoopOutput, None]:
        """
        Starts the enumeration of 4-20mA outputs currently accessible.
        Use the method YCurrentLoopOutput.nextCurrentLoopOutput() to iterate on
        next 4-20mA outputs.

        @param yctx : a YAPI context.

        @return a pointer to a YCurrentLoopOutput object, corresponding to
                the first 4-20mA output currently online, or a None pointer
                if there are none.
        """
        hwid: Union[HwId, None] = yctx._firstHwId('CurrentLoopOutput')
        if hwid:
            return cls.FindCurrentLoopOutputInContext(yctx, hwid2str(hwid))
        return None

    def nextCurrentLoopOutput(self) -> Union[YCurrentLoopOutput, None]:
        """
        Continues the enumeration of 4-20mA outputs started using yFirstCurrentLoopOutput().
        Caution: You can't make any assumption about the returned 4-20mA outputs order.
        If you want to find a specific a 4-20mA output, use CurrentLoopOutput.findCurrentLoopOutput()
        and a hardwareID or a logical name.

        @return a pointer to a YCurrentLoopOutput object, corresponding to
                a 4-20mA output currently online, or a None pointer
                if there are no more 4-20mA outputs to enumerate.
        """
        next_hwid: Union[HwId, None] = None
        try:
            next_hwid = self._yapi._nextHwId('CurrentLoopOutput', self.get_hwId())
        except YAPI_Exception:
            pass
        if next_hwid:
            return self.FindCurrentLoopOutputInContext(self._yapi, hwid2str(next_hwid))
        return None

    async def set_current(self, newval: float) -> int:
        """
        Changes the current loop, the valid range is from 3 to 21mA. If the loop is
        not properly powered, the  target current is not reached and
        loopPower is set to LOWPWR.

        @param newval : a floating point number corresponding to the current loop, the valid range is from 3 to 21mA

        @return YAPI.SUCCESS if the call succeeds.

        On failure, throws an exception or returns a negative error code.
        """
        rest_val = str(int(round(newval * 65536.0, 1)))
        return await self._setAttr("current", rest_val)

    async def get_current(self) -> float:
        """
        Returns the loop current set point in mA.

        @return a floating point number corresponding to the loop current set point in mA

        On failure, throws an exception or returns YCurrentLoopOutput.CURRENT_INVALID.
        """
        json_val: Union[float, None] = await self._fromCache("current")
        if json_val is None:
            return YCurrentLoopOutput.CURRENT_INVALID
        return round(json_val / 65.536) / 1000.0

    async def get_currentTransition(self) -> str:
        json_val: Union[str, None] = await self._fromCache("currentTransition")
        if json_val is None:
            return YCurrentLoopOutput.CURRENTTRANSITION_INVALID
        return json_val

    async def set_currentTransition(self, newval: str) -> int:
        rest_val = newval
        return await self._setAttr("currentTransition", rest_val)

    async def set_currentAtStartUp(self, newval: float) -> int:
        """
        Changes the loop current at device start up. Remember to call the matching
        module saveToFlash() method, otherwise this call has no effect.

        @param newval : a floating point number corresponding to the loop current at device start up

        @return YAPI.SUCCESS if the call succeeds.

        On failure, throws an exception or returns a negative error code.
        """
        rest_val = str(int(round(newval * 65536.0, 1)))
        return await self._setAttr("currentAtStartUp", rest_val)

    async def get_currentAtStartUp(self) -> float:
        """
        Returns the current in the loop at device startup, in mA.

        @return a floating point number corresponding to the current in the loop at device startup, in mA

        On failure, throws an exception or returns YCurrentLoopOutput.CURRENTATSTARTUP_INVALID.
        """
        json_val: Union[float, None] = await self._fromCache("currentAtStartUp")
        if json_val is None:
            return YCurrentLoopOutput.CURRENTATSTARTUP_INVALID
        return round(json_val / 65.536) / 1000.0

    async def get_loopPower(self) -> int:
        """
        Returns the loop powerstate.  POWEROK: the loop
        is powered. NOPWR: the loop in not powered. LOWPWR: the loop is not
        powered enough to maintain the current required (insufficient voltage).

        @return a value among YCurrentLoopOutput.LOOPPOWER_NOPWR, YCurrentLoopOutput.LOOPPOWER_LOWPWR and
        YCurrentLoopOutput.LOOPPOWER_POWEROK corresponding to the loop powerstate

        On failure, throws an exception or returns YCurrentLoopOutput.LOOPPOWER_INVALID.
        """
        json_val: Union[int, None] = await self._fromCache("loopPower")
        if json_val is None:
            return YCurrentLoopOutput.LOOPPOWER_INVALID
        return json_val

    if not _IS_MICROPYTHON:
        async def registerValueCallback(self, callback: YCurrentLoopOutputValueCallback) -> 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)

    async def currentMove(self, mA_target: float, ms_duration: int) -> int:
        """
        Performs a smooth transition of current flowing in the loop. Any current explicit
        change cancels any ongoing transition process.

        @param mA_target   : new current value at the end of the transition
                (floating-point number, representing the end current in mA)
        @param ms_duration : total duration of the transition, in milliseconds

        @return YAPI.SUCCESS when the call succeeds.
        """
        newval: str
        if mA_target < 3.0:
            mA_target  = 3.0
        if mA_target > 21.0:
            mA_target = 21.0
        newval = "%d:%d" % (int(round(mA_target*65536)), ms_duration)

        return await self.set_currentTransition(newval)

    # --- (end of YCurrentLoopOutput implementation)

