# Source code for evdev.device

    import contextlib
    import os
    from typing import Dict, Generic, Iterator, List, Literal, NamedTuple, Tuple, TypeVar, Union, overload

    from . import _input, ecodes, util

    try:
        from .eventio_async import EvdevError, EventIO
    except ImportError:
        from .eventio import EvdevError, EventIO

    _AnyStr = TypeVar("_AnyStr", str, bytes)

    class AbsInfo(NamedTuple):
        """Absolute axis information.

        A ``namedtuple`` with absolute axis information -
        corresponds to the ``input_absinfo`` struct:

        Attributes
        ---------
        value
          Latest reported value for the axis.

        min
          Specifies minimum value for the axis.

        max
          Specifies maximum value for the axis.

        fuzz
          Specifies fuzz value that is used to filter noise from the
          event stream.

        flat
          Values that are within this value will be discarded by joydev
          interface and reported as 0 instead.

        resolution
          Specifies resolution for the values reported for the axis.
          Resolution for main axes (``ABS_X, ABS_Y, ABS_Z``) is reported
          in units per millimeter (units/mm), resolution for rotational
          axes (``ABS_RX, ABS_RY, ABS_RZ``) is reported in units per
          radian.

        Note
        ----
        The input core does not clamp reported values to the ``[minimum,
        maximum]`` limits, such task is left to userspace.

        """

        value: int
        min: int
        max: int
        fuzz: int
        flat: int
        resolution: int

        def __str__(self):
            return "value {}, min {}, max {}, fuzz {}, flat {}, res {}".format(*self)  # pylint: disable=not-an-iterable

    class KbdInfo(NamedTuple):
        """Keyboard repeat rate.

        Attributes
        ----------
        delay
          Amount of time that a key must be depressed before it will start
          to repeat (in milliseconds).

        repeat
          Keyboard repeat rate in characters per second.
        """

        delay: int
        repeat: int

        def __str__(self):
            return "delay {}, repeat {}".format(self.delay, self.repeat)

    class DeviceInfo(NamedTuple):
        """
        Attributes
        ----------
        bustype
        vendor
        product
        version
        """

        bustype: int
        vendor: int
        product: int
        version: int

        def __str__(self) -> str:
            msg = "bus: {:04x}, vendor {:04x}, product {:04x}, version {:04x}"
            return msg.format(*self)  # pylint: disable=not-an-iterable

    class InputDevice(EventIO, Generic[_AnyStr]):
        """
        A linux input device from which input events can be read.
        """

        __slots__ = ("path", "fd", "info", "name", "phys", "uniq", "_rawcapabilities", "version", "ff_effects_count")

        def __init__(self, dev: Union[_AnyStr, "os.PathLike[_AnyStr]"]):
            """
            Arguments
            ---------
            dev : str|bytes|PathLike
              Path to input device
            """

            #: Path to input device.
            self.path: _AnyStr = dev if not hasattr(dev, "__fspath__") else dev.__fspath__()

            # Certain operations are possible only when the device is opened in read-write mode.
            try:
                fd = os.open(dev, os.O_RDWR | os.O_NONBLOCK)
            except OSError:
                fd = os.open(dev, os.O_RDONLY | os.O_NONBLOCK)

            #: A non-blocking file descriptor to the device file.
            self.fd: int = fd

            # Returns (bustype, vendor, product, version, name, phys, capabilities).
            info_res = _input.ioctl_devinfo(self.fd)

            #: A :class:`DeviceInfo <evdev.device.DeviceInfo>` instance.
            self.info = DeviceInfo(*info_res[:4])

            #: The name of the event device.
            self.name: str = info_res[4]

            #: The physical topology of the device.
            self.phys: str = info_res[5]

            #: The unique identifier of the device.
            self.uniq: str = info_res[6]

            #: The evdev protocol version.
            self.version: int = _input.ioctl_EVIOCGVERSION(self.fd)

            #: The raw dictionary of device capabilities - see `:func:capabilities()`.
            self._rawcapabilities = _input.ioctl_capabilities(self.fd)

            #: The number of force feedback effects the device can keep in its memory.
            self.ff_effects_count = _input.ioctl_EVIOCGEFFECTS(self.fd)

        def __del__(self) -> None:
            if hasattr(self, "fd") and self.fd is not None:
                try:
                    self.close()
                except (OSError, ImportError, AttributeError):
                    pass

        def _capabilities(self, absinfo: bool = True):
            res = {}

            for etype, _ecodes in self._rawcapabilities.items():
                for code in _ecodes:
                    l = res.setdefault(etype, [])
                    if isinstance(code, tuple):
                        if absinfo:
                            a = code[1]  # (0, 0, 0, 255, 0, 0)
                            i = AbsInfo(*a)
                            l.append((code[0], i))
                        else:
                            l.append(code[0])
                    else:
                        l.append(code)

            return res

        @overload
        def capabilities(self, verbose: Literal[False] = ..., absinfo: bool = ...) -> Dict[int, List[int]]:
            ...
        @overload
        def capabilities(self, verbose: Literal[True], absinfo: bool = ...) -> Dict[Tuple[str, int], List[Tuple[str, int]]]:
            ...

        def capabilities(self, verbose: bool = False, absinfo: bool = True) -> Union[Dict[int, List[int]], Dict[Tuple[str, int], List[Tuple[str, int]]]]:
            """
            Return the event types that this device supports as a mapping of
            supported event types to lists of handled event codes.

            Example
            --------
            >>> device.capabilities()
            { 1: [272, 273, 274],
              2: [0, 1, 6, 8] }

            If ``verbose`` is ``True``, event codes and types will be resolved
            to their names.

            ::

              { ('EV_KEY', 1): [('BTN_MOUSE', 272),
                                ('BTN_RIGHT', 273),
                                ('BTN_MIDDLE', 273)],
                ('EV_REL', 2): [('REL_X', 0),
                                ('REL_Y', 1),
                                ('REL_HWHEEL', 6),
                                ('REL_WHEEL', 8)] }

            Unknown codes or types will be resolved to ``'?'``.

            If ``absinfo`` is ``True``, the list of capabilities will also
            include absolute axis information in the form of
            :class:`AbsInfo` instances::

              { 3: [ (0, AbsInfo(min=0, max=255, fuzz=0, flat=0)),
                     (1, AbsInfo(min=0, max=255, fuzz=0, flat=0)) ]}

            Combined with ``verbose`` the above becomes::

              { ('EV_ABS', 3): [ (('ABS_X', 0), AbsInfo(min=0, max=255, fuzz=0, flat=0)),
                                 (('ABS_Y', 1), AbsInfo(min=0, max=255, fuzz=0, flat=0)) ]}

            """

            if verbose:
                return dict(util.resolve_ecodes_dict(self._capabilities(absinfo)))
            else:
                return self._capabilities(absinfo)

        def input_props(self, verbose: bool = False):
            """
            Get device properties and quirks.

            Example
            -------
            >>> device.input_props()
            [0, 5]

            If ``verbose`` is ``True``, input properties are resolved to their
            names. Unknown codes are resolved to ``'?'``::

            [('INPUT_PROP_POINTER', 0), ('INPUT_PROP_POINTING_STICK', 5)]

            """
            props = _input.ioctl_EVIOCGPROP(self.fd)
            if verbose:
                return util.resolve_ecodes(ecodes.INPUT_PROP, props)

            return props

        def leds(self, verbose: bool = False):
            """
            Return currently set LED keys.

            Example
            -------
            >>> device.leds()
            [0, 1, 8, 9]

            If ``verbose`` is ``True``, event codes are resolved to their
            names. Unknown codes are resolved to ``'?'``::

            [('LED_NUML', 0), ('LED_CAPSL', 1), ('LED_MISC', 8), ('LED_MAIL', 9)]

            """
            leds = _input.ioctl_EVIOCG_bits(self.fd, ecodes.EV_LED)
            if verbose:
                return util.resolve_ecodes(ecodes.LED, leds)

            return leds

        def set_led(self, led_num: int, value: int) -> None:
            """
            Set the state of the selected LED.

            Example
            -------
            >>> device.set_led(ecodes.LED_NUML, 1)
            """
            self.write(ecodes.EV_LED, led_num, value)

        def __eq__(self, other):
            """
            Two devices are equal if their :data:`info` attributes are equal.
            """
            return isinstance(other, self.__class__) and self.info == other.info and self.path == other.path

        def __str__(self) -> str:
            msg = 'device {}, name "{}", phys "{}", uniq "{}"'
            return msg.format(self.path, self.name, self.phys, self.uniq or "")

        def __repr__(self) -> str:
            msg = (self.__class__.__name__, self.path)
            return "{}({!r})".format(*msg)

        def __fspath__(self):
            return self.path

        def close(self) -> None:
            if self.fd > -1:
                try:
                    super().close()
                    os.close(self.fd)
                finally:
                    self.fd = -1

        def grab(self) -> None:
            """
            Grab input device using ``EVIOCGRAB`` - other applications will
            be unable to receive events until the device is released. Only
            one process can hold a ``EVIOCGRAB`` on a device.

            Warning
            -------
            Grabbing an already grabbed device will raise an ``OSError``.
            """

            _input.ioctl_EVIOCGRAB(self.fd, 1)

        def ungrab(self) -> None:
            """
            Release device if it has been already grabbed (uses `EVIOCGRAB`).

            Warning
            -------
            Releasing an already released device will raise an
            ``OSError('Invalid argument')``.
            """

            _input.ioctl_EVIOCGRAB(self.fd, 0)

        @contextlib.contextmanager
        def grab_context(self) -> Iterator[None]:
            """
            A context manager for the duration of which only the current
            process will be able to receive events from the device.
            """
            self.grab()
            yield
            self.ungrab()

        def upload_effect(self, effect: "ff.Effect"):
            """
            Upload a force feedback effect to a force feedback device.
            """

            data = memoryview(effect).tobytes()
            ff_id = _input.upload_effect(self.fd, data)
            return ff_id

        def erase_effect(self, ff_id) -> None:
            """
            Erase a force effect from a force feedback device. This also
            stops the effect.
            """

            _input.erase_effect(self.fd, ff_id)

        @property
        def repeat(self):
            """
            Get or set the keyboard repeat rate (in characters per
            minute) and delay (in milliseconds).
            """

            return KbdInfo(*_input.ioctl_EVIOCGREP(self.fd))

        @repeat.setter
        def repeat(self, value: Tuple[int, int]):
            return _input.ioctl_EVIOCSREP(self.fd, *value)

        def active_keys(self, verbose: bool = False):
            """
            Return currently active keys.

            Example
            -------

            >>> device.active_keys()
            [1, 42]

            If ``verbose`` is ``True``, key codes are resolved to their
            verbose names. Unknown codes are resolved to ``'?'``. For
            example::

              [('KEY_ESC', 1), ('KEY_LEFTSHIFT', 42)]

            """
            active_keys = _input.ioctl_EVIOCG_bits(self.fd, ecodes.EV_KEY)
            if verbose:
                return util.resolve_ecodes(ecodes.KEY, active_keys)

            return active_keys

        def absinfo(self, axis_num: int):
            """
            Return current :class:`AbsInfo` for input device axis

            Arguments
            ---------
            axis_num : int
              EV_ABS keycode (example :attr:`ecodes.ABS_X`)

            Example
            -------
            >>> device.absinfo(ecodes.ABS_X)
            AbsInfo(value=1501, min=-32768, max=32767, fuzz=0, flat=128, resolution=0)
            """
            return AbsInfo(*_input.ioctl_EVIOCGABS(self.fd, axis_num))

        def set_absinfo(self, axis_num: int, value=None, min=None, max=None, fuzz=None, flat=None, resolution=None) -> None:
            """
            Update :class:`AbsInfo` values. Only specified values will be overwritten.

            Arguments
            ---------
            axis_num : int
              EV_ABS keycode (example :attr:`ecodes.ABS_X`)

            Example
            -------
            >>> device.set_absinfo(ecodes.ABS_X, min=-2000, max=2000)

            You can also unpack AbsInfo tuple that will overwrite all values

            >>> device.set_absinfo(ecodes.ABS_Y, *AbsInfo(0, -2000, 2000, 0, 15, 0))
            """

            cur_absinfo = self.absinfo(axis_num)
            new_absinfo = AbsInfo(
                value if value is not None else cur_absinfo.value,
                min if min is not None else cur_absinfo.min,
                max if max is not None else cur_absinfo.max,
                fuzz if fuzz is not None else cur_absinfo.fuzz,
                flat if flat is not None else cur_absinfo.flat,
                resolution if resolution is not None else cur_absinfo.resolution,
            )
            _input.ioctl_EVIOCSABS(self.fd, axis_num, new_absinfo)