# -*- coding: utf-8 -*-
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#  $Id: svn_id $
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#  Asyncio implementation of YAltitude
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"""
Yoctopuce library: Asyncio implementation of YAltitude
version: PATCH_WITH_VERSION
requires: yocto_api_aio
"""
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, YSensor, YMeasure
)

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

# noinspection PyProtectedMember
class YAltitude(YSensor):
    """
    The YAltitude class allows you to read and configure Yoctopuce altimeters.
    It inherits from YSensor class the core functions to read measurements,
    to register callback functions, and to access the autonomous datalogger.
    This class adds the ability to configure the barometric pressure adjusted to
    sea level (QNH) for barometric sensors.

    """
    # --- (end of YAltitude class start)
    if not _IS_MICROPYTHON:
        # --- (YAltitude return codes)
        QNH_INVALID: Final[float] = YAPI.INVALID_DOUBLE
        TECHNOLOGY_INVALID: Final[str] = YAPI.INVALID_STRING
        # --- (end of YAltitude return codes)

    # --- (YAltitude attributes declaration)
    _qnh: float
    _technology: str
    _valueCallback: YAltitudeValueCallback
    _timedReportCallback: YAltitudeTimedReportCallback
    # --- (end of YAltitude attributes declaration)


    def __init__(self, yctx: YAPIContext, func: str):
        super().__init__(yctx, func)
        self._className = 'Altitude'
        # --- (YAltitude constructor)
        self._qnh = YAltitude.QNH_INVALID
        self._technology = YAltitude.TECHNOLOGY_INVALID
        # --- (end of YAltitude constructor)

    # --- (YAltitude implementation)

    @staticmethod
    def FirstAltitude() -> Union[YAltitude, None]:
        """
        Starts the enumeration of altimeters currently accessible.
        Use the method YAltitude.nextAltitude() to iterate on
        next altimeters.

        @return a pointer to a YAltitude object, corresponding to
                the first altimeter currently online, or a None pointer
                if there are none.
        """
        next_hwid: Union[HwId, None] = YAPI._yHash.getFirstHardwareId('Altitude')
        if not next_hwid:
            return None
        return YAltitude.FindAltitude(hwid2str(next_hwid))

    @staticmethod
    def FirstAltitudeInContext(yctx: YAPIContext) -> Union[YAltitude, None]:
        """
        Starts the enumeration of altimeters currently accessible.
        Use the method YAltitude.nextAltitude() to iterate on
        next altimeters.

        @param yctx : a YAPI context.

        @return a pointer to a YAltitude object, corresponding to
                the first altimeter currently online, or a None pointer
                if there are none.
        """
        next_hwid: Union[HwId, None] = yctx._yHash.getFirstHardwareId('Altitude')
        if not next_hwid:
            return None
        return YAltitude.FindAltitudeInContext(yctx, hwid2str(next_hwid))

    def nextAltitude(self):
        """
        Continues the enumeration of altimeters started using yFirstAltitude().
        Caution: You can't make any assumption about the returned altimeters order.
        If you want to find a specific an altimeter, use Altitude.findAltitude()
        and a hardwareID or a logical name.

        @return a pointer to a YAltitude object, corresponding to
                an altimeter currently online, or a None pointer
                if there are no more altimeters to enumerate.
        """
        next_hwid: Union[HwId, None] = None
        try:
            hwid: HwId = self._yapi._yHash.resolveHwID(self._className, self._func)
            next_hwid = self._yapi._yHash.getNextHardwareId(self._className, hwid)
        except YAPI_Exception:
            pass
        if not next_hwid:
            return None
        return YAltitude.FindAltitudeInContext(self._yapi, hwid2str(next_hwid))

    def _parseAttr(self, json_val: dict) -> None:
        if 'qnh' in json_val:
            self._qnh = round(json_val["qnh"] / 65.536) / 1000.0
        self._technology = json_val.get("technology", self._technology)
        super()._parseAttr(json_val)

    async def set_currentValue(self, newval: float) -> int:
        """
        Changes the current estimated altitude. This allows one to compensate for
        ambient pressure variations and to work in relative mode.
        Remember to call the saveToFlash()
        method of the module if the modification must be kept.

        @param newval : a floating point number corresponding to the current estimated altitude

        @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("currentValue", rest_val)

    async def set_qnh(self, newval: float) -> int:
        """
        Changes the barometric pressure adjusted to sea level used to compute
        the altitude (QNH). This enables you to compensate for atmospheric pressure
        changes due to weather conditions. Applicable to barometric altimeters only.
        Remember to call the saveToFlash()
        method of the module if the modification must be kept.

        @param newval : a floating point number corresponding to the barometric pressure adjusted to sea
        level used to compute
                the altitude (QNH)

        @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("qnh", rest_val)

    async def get_qnh(self) -> float:
        """
        Returns the barometric pressure adjusted to sea level used to compute
        the altitude (QNH). Applicable to barometric altimeters only.

        @return a floating point number corresponding to the barometric pressure adjusted to sea level used to compute
                the altitude (QNH)

        On failure, throws an exception or returns YAltitude.QNH_INVALID.
        """
        res: float
        if self._cacheExpiration <= YAPI.GetTickCount():
            if await self.load(self._yapi.GetCacheValidity()) != YAPI.SUCCESS:
                return YAltitude.QNH_INVALID
        res = self._qnh
        return res

    async def get_technology(self) -> str:
        """
        Returns the technology used by the sesnor to compute
        altitude. Possibles values are  "barometric" and "gps"

        @return a string corresponding to the technology used by the sesnor to compute
                altitude

        On failure, throws an exception or returns YAltitude.TECHNOLOGY_INVALID.
        """
        res: str
        if self._cacheExpiration <= YAPI.GetTickCount():
            if await self.load(self._yapi.GetCacheValidity()) != YAPI.SUCCESS:
                return YAltitude.TECHNOLOGY_INVALID
        res = self._technology
        return res

    @staticmethod
    def FindAltitude(func: str) -> YAltitude:
        """
        Retrieves an altimeter 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 altimeter is online at the time
        it is invoked. The returned object is nevertheless valid.
        Use the method YAltitude.isOnline() to test if the altimeter is
        indeed online at a given time. In case of ambiguity when looking for
        an altimeter 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 altimeter, for instance
                YALTIMK2.altitude.

        @return a YAltitude object allowing you to drive the altimeter.
        """
        obj: Union[YAltitude, None]
        obj = YFunction._FindFromCache("Altitude", func)
        if obj is None:
            obj = YAltitude(YAPI, func)
            YFunction._AddToCache("Altitude", func, obj)
        return obj

    @staticmethod
    def FindAltitudeInContext(yctx: YAPIContext, func: str) -> YAltitude:
        """
        Retrieves an altimeter 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 altimeter is online at the time
        it is invoked. The returned object is nevertheless valid.
        Use the method YAltitude.isOnline() to test if the altimeter is
        indeed online at a given time. In case of ambiguity when looking for
        an altimeter 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 altimeter, for instance
                YALTIMK2.altitude.

        @return a YAltitude object allowing you to drive the altimeter.
        """
        obj: Union[YAltitude, None]
        obj = YFunction._FindFromCacheInContext(yctx, "Altitude", func)
        if obj is None:
            obj = YAltitude(yctx, func)
            YFunction._AddToCache("Altitude", func, obj)
        return obj

    if not _IS_MICROPYTHON:
        async def registerValueCallback(self, callback: YAltitudeValueCallback) -> int:
            """
            Registers the callback function that is invoked on every change of advertised value.
            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 the character string describing
                    the new advertised value.
            @noreturn
            """
            return await super().registerValueCallback(callback)

    if not _IS_MICROPYTHON:
        async def registerTimedReportCallback(self, callback: YAltitudeTimedReportCallback) -> 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 YAltitude implementation)

