# coding: utf-8

"""

Interfaces contain low level implementations that interact with CAN hardware.

"""

import warnings

from pkg_resources import iter_entry_points

# interface_name => (module, classname)

BACKENDS = {

'kvaser': ('can.interfaces.kvaser', 'KvaserBus'),

'socketcan': ('can.interfaces.socketcan', 'SocketcanBus'),

'serial': ('can.interfaces.serial.serial_can','SerialBus'),

'pcan': ('can.interfaces.pcan', 'PcanBus'),

'usb2can': ('can.interfaces.usb2can', 'Usb2canBus'),

'ixxat': ('can.interfaces.ixxat', 'IXXATBus'),

'nican': ('can.interfaces.nican', 'NicanBus'),

'iscan': ('can.interfaces.iscan', 'IscanBus'),

'virtual': ('can.interfaces.virtual', 'VirtualBus'),

'neovi': ('can.interfaces.ics_neovi', 'NeoViBus'),

'vector': ('can.interfaces.vector', 'VectorBus'),

'slcan': ('can.interfaces.slcan', 'slcanBus'),

'canalystii': ('can.interfaces.canalystii', 'CANalystIIBus'),

'systec': ('can.interfaces.systec', 'UcanBus')

}

BACKENDS.update({

interface.name: (interface.module_name, interface.attrs[0])

for interface in iter_entry_points('can.interface')

})

# Old entry point name. May be removed >3.0.

for interface in iter_entry_points('python_can.interface'):

BACKENDS[interface.name] = (interface.module_name, interface.attrs[0])

warnings.warn('{} is using the deprecated python_can.interface entry point. '.format(interface.name) +

'Please change to can.interface instead.', DeprecationWarning)

VALID_INTERFACES = frozenset(list(BACKENDS.keys()) + ['socketcan_native', 'socketcan_ctypes'])