# Source code for canlib.canlib.iopin

    """Experimental support for accessing IO-pins on sub modules of the Kvaser DIN
    Rail SE 400S that was added to CANlib v5.26.

    .. versionadded:: 1.8

    """

    import ctypes as ct

    from ..cenum import CEnum
    from ..versionnumber import VersionNumber
    from . import wrapper

    dll = wrapper.dll

    def get_io_pin(channel, index):
        """Return io pin object for `index`

        Arguments:
            index (`int`): The global pin number

        Returns subclass of `IoPin` depending on pin type and direction:
        `AnalogIn`, `AnalogOut`, `DigitalIn`, `DigitalOut` or `Relay`.

        """
        io_pin = IoPin(channel, index)
        pin_class = _PIN_CLASSES[io_pin.pin_type][io_pin.direction]
        my_io_pin = pin_class(channel, index)
        return my_io_pin

    def module_pin_names(module_type, prefix=''):
        """Return a list of names for `module_type`

        Returns a list of label names for the given type of module::

            >>> iopin.module_pin_names(iopin.ModuleType.ANALOG)
            ['AO1', 'AO2', 'AO3', 'AO4', 'AI1', 'AI2', 'AI3', 'AI4']

            >>> iopin.module_pin_names(iopin.ModuleType.RELAY)
            ['R1', 'R2', 'R3', 'R4', 'R5', 'R6', 'R7', 'R8', 'DI1', 'DI2', 'DI3',
            'DI4', 'DI5', 'DI6', 'DI7', 'DI8']

        Args:
            module_type (`iopin.ModuleType`) : Type of module

        """
        if module_type == ModuleType.DIGITAL:
            pin_names = ['%sDO%s' % (prefix, x) for x in range(1, 17)]
            pin_names += ['%sDI%s' % (prefix, x) for x in range(1, 17)]
        elif module_type == ModuleType.ANALOG:
            pin_names = ['%sAO%s' % (prefix, x) for x in range(1, 5)]
            pin_names += ['%sAI%s' % (prefix, x) for x in range(1, 5)]
        elif module_type == ModuleType.RELAY:
            pin_names = ['%sR%s' % (prefix, x) for x in range(1, 9)]
            pin_names += ['%sDI%s' % (prefix, x) for x in range(1, 9)]
        else:
            raise AttributeError("%s is an unknown ModuleType" % module_type)
        return pin_names

    def _create_pin_names(io_pins):
        """Create a list of names for the given list of `iopin.IoPin`.

        Used by `iopin.Configuration` to create a list of label pin names
        from a given list of `iopin.IoPin`s

        """
        module_index = 0
        pin_index = 0
        pin_names = []
        while pin_index < len(io_pins):
            module_index += 1
            names = module_pin_names(io_pins[pin_index].module_type, prefix='%s:' % module_index)
            pin_names += names
            pin_index += len(names)
        return pin_names

    class AddonModule(object):
        """Contains information about one add-on module

        Attributes:
            type (`iopin.ModuleType`): The type of the add-on module.
            sw_version (`canlib.Version`): The software version in the add-on module.
            serial (int): The serial number of the add-on module.
            first_index (int): The index of the add-on modules first pin.

        .. versionadded:: 1.9

        """
        def __init__(self, module_type, fw_version=None, serial=None, first_pin_index=None):
            self.module_type = module_type
            self.fw_version = fw_version
            self.serial = serial
            self.first_pin_index = first_pin_index

        def __repr__(self):
            return "AddonModule(module_type={typ!r}, fw_version={fw!r}, serial={sn}), first_pin_index={fp}".format(
                typ=self.module_type, fw=self.fw_version, sn=self.serial, fp=self.first_pin_index)

        def issubset(self, spec):
            """Check if current attributes are fulfilling attributes in spec

            Any attribute in spec that is set to None is automatically considered fulfilled.

            The `fw_version` attribute is considered fulfilled when
            `self.fw_version >= spec.fw_version`.

            This can be used to check if a specific module fulfills a manually
            created specification::

            >>> module_spec = iopin.AddonModule(module_type=iopin.ModuleType.DIGITAL)
            >>> modules = iopin.Configuration(channel)
            >>> module[0].issubset(module_spec)
            True

            >>> module_spec = iopin.AddonModule(module_type=iopin.ModuleType.DIGITAL,
                                            fw_version=VersionNumber(major=3, minor=1),
                                            serial=2342)

            >>> module[0].issubset(module_spec)
            False

            config = iopin.Configuration(channel)

            >>> config.issubset(config_spec)
            True

            config_spec = [iopin.AddonModule(module_type=iopin.ModuleType.ANALOG),
                           iopin.AddonModule(module_type=iopin.ModuleType.DIGITAL,
                                             fw_version=VersionNumber(major=3, minor=1),
                                             serial=2342)]

            >>> config.issubset(config_spec)
            False

            """
            if spec.module_type is not None and self.module_type != spec.module_type:
                return False
            if spec.fw_version is not None and self.fw_version is None:
                return False
            if spec.fw_version is not None and self.fw_version < spec.fw_version:
                return False
            if spec.serial is not None and self.serial != spec.serial:
                return False
            if spec.first_pin_index is not None and self.first_pin_index != spec.first_pin_index:
                return False
            return True

    class Configuration(object):
        """Contains I/O pins and the `canlib.Channel` to find them on

        Creating this object may take some time depending on the number of I/O pins
        availably on the given `canlib.Channel`.

        Args:
            channel ('canlib.Channel'): The channel where the discovery of I/O pins
            should take place.

        Attributes:
            io_pins (list(`iopin.IoPin`)): All discovered I/O pins.
            pin_names (list(str)): List of label I/O pin names.
            pin_index (dict(str: int)): Dictionary with I/O pin label name as key, and pin index as value.

        To create an `iopin.Configuration` you need to supply the `canlib.Channel`,
        which is were we look for I/O pins:

            >>> from canlib.canlib import iopin

            >>> from canlib import canlib, Device, EAN

            >>> device = Device.find(ean=EAN('01059-8'), serial=225)

            >>> channel = canlib.openChannel(device.channel_number(), canlib.Open.EXCLUSIVE)

            >>> config = iopin.Configuration(channel)

        Now we can investigate a specific pin by index::

            >>> config.pin(index=80)
            Pin 80: <PinType.ANALOG: 2> <Direction.OUT: 8> bits=12 range=0.0-10.0 (<ModuleType.ANALOG: 2>)

        It is also possible to find the label name from the index and vice verse
        for a pin, as well as access the pin using the label name::

            >>> config.name(80)
            '4:AO1'

            >>> config.index('4:AO1')
            80

            >>> config.pin(name='4:AO1')
            Pin 80: <PinType.ANALOG: 2> <Direction.OUT: 8> bits=12 range=0.0-10.0 (<ModuleType.ANALOG: 2>)

        Note:
            A configuration needs to be confirmed using `iopin.Configuration.confirm`
            (which calls canlib.channel.io_confirm_config`) before accessing pin values::

                >>> config.pin(name='4:AO1').value = 4
                Traceback (most recent call last):
                  File "<stdin>", line 1, in <module>
                  File "...\\canlib\\canlib\\iopin.py", line 271, in value
                  File "...\\canlib\\canlib\\dll.py", line 94, in _error_check
                    raise can_error(result)
                canlib.canlib.exceptions.IoPinConfigurationNotConfirmed: I/O pin configuration is not confirmed (-45)
                I/O pin configuration is not confirmed (-45)

                >>> config.confirm()

                >>> config.pin(name='4:AO1').value = 4

        An `iopin.Configuration` may be compared with an expected ordered list of
        `iopin.AddonModule` before confirming using `iopin.AddonModule.issubset`

        .. versionchanged:: 1.9
           `Configuration.modules` is now an attribute, containing an ordered list of `AddonModule` objects.
        """
        def __init__(self, channel):
            self._channel = channel
            self.io_pins = []
            for index in range(self._channel.number_of_io_pins()):
                self.io_pins.append(self._channel.get_io_pin(index))
            self.pin_names = _create_pin_names(self.io_pins)
            self.pin_index = {v: i for i, v in enumerate(self.pin_names)}
            self.modules = self._modules()

        def __iter__(self):
            """Returns an iterator for all pins known in configuration"""
            return iter(self.io_pins)

        def _modules(self):
            """Return an up-to-date list of modules in the configuration"""
            modules = []
            pin_index = 0
            while pin_index < len(self.io_pins):
                module = AddonModule(
                    module_type=self.io_pins[pin_index].module_type,
                    fw_version=self.io_pins[pin_index].fw_version,
                    serial=self.io_pins[pin_index].serial,
                    first_pin_index=pin_index,
                    )
                modules.append(module)
                pin_index += len(module_pin_names(module.module_type))
            return modules

        def confirm(self):
            """Confirm current configuration

            Convenience function that calls `Channel.io_confirm_config`.

            """
            self._channel.io_confirm_config()

        def index(self, name):
            """Return index for pin with the given label name"""
            return self.pin_index[name]

        def issubset(self, spec):
            """Check if attributes of modules in self is fulfilled by given spec

            This is a convenience method that calls `AddonModule.issubset` on all
            modules given by `self.modules` which can be used to check if the
            current configuration fulfills a manually created specification::

            >>> config = iopin.Configuration(channel)
            >>> config_spec = [iopin.AddonModule(module_type=iopin.ModuleType.ANALOG),
                               iopin.AddonModule(module_type=iopin.ModuleType.DIGITAL,
                                                 fw_version=VersionNumber(major=3, minor=1),
                                                 serial=2342)]

            >>> config.issubset(config_spec)
            False

            .. versionadded:: 1.9

            """
            if len(self.modules) != len(spec):
                return False
            return all((m.issubset(s) for m, s in zip(self.modules, spec)))

        def name(self, index):
            """Return label name for pin with given index"""
            return self.pin_names[index]

        def pin(self, index=None, name=None):
            """Return `IoPin` object using index or name

            Either `index` or `name` must be given, if both are given, the name
            will be used.

            Args:
                index (int): I/O pin index
                name (str): I/O pin name

            """
            if name is not None:
                index = self.pin_index[name]
            return self.io_pins[index]

    class Info(CEnum):
        """Enum used for calls to `kvIoPinGetInfo` and `kvIoPinSetInfo`"""
        MODULE_TYPE = 1
        DIRECTION = 2
        PIN_TYPE = 4
        NUMBER_OF_BITS = 5
        RANGE_MIN = 6
        RANGE_MAX = 7
        DI_LOW_HIGH_FILTER = 8  # 0 - 65000, Default 5000 us
        DI_HIGH_LOW_FILTER = 9  # 0 - 65000, Default 5000 us
        AI_LP_FILTER_ORDER = 10  # 0 - 16, default 3 (sample time is 1 ms)
        AI_HYSTERESIS = 11  # 0 - 10, default 0.3
        MODULE_NUMBER = 14
        SERIAL_NUMBER = 15
        FW_VERSION = 16

    class ModuleType(CEnum):
        """Enum used for return values in `kvIoPinGetInfo`"""
        DIGITAL = 1  # Digital Add-on (16 inputs, 16 outputs)
        ANALOG = 2  # Analog Add-on (4 inputs, 4 outputs)
        RELAY = 3  # Relay Add-on (8 inputs, 8 outputs)

    class PinType(CEnum):
        """Enum used for return values in `kvIoPinGetInfo`"""
        DIGITAL = 1
        ANALOG = 2
        RELAY = 3

    class Direction(CEnum):
        """Enum used for return values in `kvIoPinGetInfo`"""
        IN = 4
        OUT = 8

    class DigitalValue(CEnum):
        """Enum used digital values"""
        LOW = 0
        HIGH = 1

    class IoPin(object):
        """Base class of I/O ports"""

        def __init__(self, channel, pin):
            self.channel = channel
            self.pin = pin

        def __repr__(self):
            txt = "Pin {p}: {pt!r} {d!r} bits={nb} range={rmin}-{rmax} ({mt!r})".format(
                p=self.pin, pt=self.pin_type, d=self.direction, nb=self.number_of_bits,
                rmin=self.range_min, rmax=self.range_max, mt=self.module_type)
            return txt

        def _get_info(self, info, buf_type):
            buf = buf_type()
            dll.kvIoPinGetInfo(self.channel.handle, self.pin, info, ct.byref(buf), ct.sizeof(buf))
            return buf.value

        def _set_info(self, info, c_value):
            dll.kvIoPinSetInfo(self.channel.handle, self.pin, info,
                               ct.byref(c_value), ct.sizeof(c_value))

        @property
        def fw_version(self):
            """VersionNumber: Firmware version in module (Read-only)"""
            buf_type = ct.c_uint32
            value = self._get_info(Info.FW_VERSION, buf_type)
            fw_version = VersionNumber((value >> 16) & 0xFFFF, value & 0xFFFF)
            return fw_version

        @property
        def direction(self):
            """`Direction`: Pin direction (Read-only)"""
            buf_type = ct.c_uint32
            value = self._get_info(Info.DIRECTION, buf_type)
            return Direction(value)

        @property
        def module_type(self):
            """`ModuleType`: Type of module (Read-only)"""
            buf_type = ct.c_uint32
            value = self._get_info(Info.MODULE_TYPE, buf_type)
            return ModuleType(value)

        @property
        def number_of_bits(self):
            """int: Resolution in number of bits (Read-only)"""
            buf_type = ct.c_uint32
            value = self._get_info(Info.NUMBER_OF_BITS, buf_type)
            return value

        @property
        def pin_type(self):
            """`PinType`: Type of pin (Read-only)"""
            buf_type = ct.c_uint32
            value = self._get_info(Info.PIN_TYPE, buf_type)
            return PinType(value)

        @property
        def range_min(self):
            """float: Lower range limit in volts (Read-only)"""
            buf_type = ct.c_float
            value = self._get_info(Info.RANGE_MIN, buf_type)
            return value

        @property
        def range_max(self):
            """float: Upper range limit in volts (Read-only)"""
            buf_type = ct.c_float
            value = self._get_info(Info.RANGE_MAX, buf_type)
            return value

        @property
        def serial(self):
            """int: Module serial number (Read-only)"""
            buf_type = ct.c_uint32
            value = self._get_info(Info.SERIAL_NUMBER, buf_type)
            return value

        @property
        def value(self):
            """Base class does not implement value attribute"""
            raise AttributeError("can't get attribute value")

        @value.setter
        def value(self, value):
            raise AttributeError("can't set attribute value")

        @property
        def hysteresis(self):
            """Base class does not implement hysteresis attribute"""
            raise AttributeError("can't get attribute hysteresis")

        @hysteresis.setter
        def hysteresis(self, value):
            raise AttributeError("can't set attribute hysteresis")

        @property
        def lp_filter_order(self):
            """Base class does not implement lp_filter_order attribute"""
            raise AttributeError("can't get attribute lp_filter_order")

        @lp_filter_order.setter
        def lp_filter_order(self, value):
            raise AttributeError("can't set attribute lp_filter_order")

    class AnalogIn(IoPin):
        def __repr__(self):
            txt = "Pin {p}: {pt!r} {d!r} bits={nb} range={rmin}-{rmax} LP_filter_order={lpfo} hysteresis={h} ({mt!r})".format(
                p=self.pin, pt=self.pin_type, d=self.direction, nb=self.number_of_bits,
                rmin=self.range_min, rmax=self.range_max, lpfo=self.lp_filter_order,
                h=self.hysteresis, mt=self.module_type)
            return txt

        @property
        def hysteresis(self):
            """The hysteresis in Volt for analog input pin"""
            buf_type = ct.c_float
            value = self._get_info(Info.AI_HYSTERESIS, buf_type)
            return value

        @hysteresis.setter
        def hysteresis(self, value):
            c_value = ct.c_float(value)
            self._set_info(Info.AI_HYSTERESIS, c_value)

        @property
        def lp_filter_order(self):
            """The low-pass filter order for analog input pin"""
            buf_type = ct.c_uint32
            value = self._get_info(Info.AI_LP_FILTER_ORDER, buf_type)
            return value

        @lp_filter_order.setter
        def lp_filter_order(self, value):
            c_value = ct.c_uint32(value)
            self._set_info(Info.AI_LP_FILTER_ORDER, c_value)

        @property
        def value(self):
            """Voltage level on the Analog input pin"""
            voltage = ct.c_float()
            dll.kvIoPinGetAnalog(self.channel.handle, self.pin, ct.byref(voltage))
            return voltage.value

    class AnalogOut(IoPin):
        @property
        def value(self):
            """Voltage level on the Analog output pin"""
            voltage = ct.c_float()
            dll.kvIoPinGetOutputAnalog(self.channel.handle, self.pin, ct.byref(voltage))
            return voltage.value

        @value.setter
        def value(self, value):
            voltage = ct.c_float(value)
            dll.kvIoPinSetAnalog(self.channel.handle, self.pin, voltage)

    class DigitalIn(IoPin):
        def __repr__(self):
            txt = "Pin {p}: {pt!r} {d!r} bits={nb} range={rmin}-{rmax} HL_filter={hlf} LH_filter={lhf} ({mt!r})".format(
                p=self.pin, pt=self.pin_type, d=self.direction, nb=self.number_of_bits,
                rmin=self.range_min, rmax=self.range_max, lhf=self.low_high_filter,
                hlf=self.high_low_filter, mt=self.module_type)
            return txt

        @property
        def high_low_filter(self):
            """Filter time in micro seconds when a digital pin goes from HIGH to LOW"""
            buf_type = ct.c_uint32
            value = self._get_info(Info.DI_HIGH_LOW_FILTER, buf_type)
            return value

        @high_low_filter.setter
        def high_low_filter(self, value):
            c_value = ct.c_uint32(value)
            self._set_info(Info.DI_HIGH_LOW_FILTER, c_value)

        @property
        def low_high_filter(self):
            """Filter time in micro seconds when a digital pin goes from LOW to HIGH"""
            buf_type = ct.c_uint32
            value = self._get_info(Info.DI_LOW_HIGH_FILTER, buf_type)
            return value

        @low_high_filter.setter
        def low_high_filter(self, value):
            c_value = ct.c_uint32(value)
            self._set_info(Info.DI_LOW_HIGH_FILTER, c_value)

        @property
        def value(self):
            """Value on digital input pin (0 or 1)"""
            value = ct.c_uint()
            dll.kvIoPinGetDigital(self.channel.handle, self.pin, ct.byref(value))
            return value.value

    class DigitalOut(IoPin):
        @property
        def value(self):
            """Value on digital output pin (0 or 1)"""
            value = ct.c_uint()
            dll.kvIoPinGetOutputDigital(self.channel.handle, self.pin, ct.byref(value))
            return value.value

        @value.setter
        def value(self, value):
            c_value = ct.c_uint(value)
            dll.kvIoPinSetDigital(self.channel.handle, self.pin, c_value)

    class Relay(IoPin):
        @property
        def value(self):
            """Value on relay (0:off, 1:on)"""
            value = ct.c_uint()
            dll.kvIoPinGetOutputRelay(self.channel.handle, self.pin, ct.byref(value))
            return value.value

        @value.setter
        def value(self, value):
            c_value = ct.c_uint(value)
            dll.kvIoPinSetRelay(self.channel.handle, self.pin, c_value)

        def __repr__(self):
            txt = "Pin {p}: {pt!r} {d!r} bits={nb} ({mt!r})".format(
                p=self.pin, pt=self.pin_type, d=self.direction, nb=self.number_of_bits,
                mt=self.module_type)
            return txt

    _PIN_CLASSES = {
        PinType.RELAY: {Direction.IN: Relay, Direction.OUT: Relay},
        PinType.ANALOG: {Direction.IN: AnalogIn, Direction.OUT: AnalogOut},
        PinType.DIGITAL: {Direction.IN: DigitalIn, Direction.OUT: DigitalOut},
    }