try:
    import netaddr
    HAS_NETADDR = True
except ImportError:
    HAS_NETADDR = False
try:
    import netifaces
    HAS_NETIFACES = True
except ImportError:
    HAS_NETIFACES = False

from ansible.module_utils.basic import AnsibleModule


def check_interfaces(name, address):
    result = {
        'success': False,
        'data': {
            'found': False,
            'name': '',
            'interfaces': {}
        }
    }

    for interface in netifaces.interfaces():
        addresses = netifaces.ifaddresses(interface)
        result['data']['interfaces'][interface] = addresses

        try:
            if netaddr.IPAddress(addresses[netifaces.AF_INET][0]['addr']) in netaddr.IPNetwork(address):
                if interface == name:
                    result['success'] = True
                    result['data']['found'] = True
                    result['data']['name'] = name
                else:
                    result['success'] = True
                    result['data']['found'] = False
                    result['data']['name'] = interface
        except KeyError:
            pass

    return result


def main():
    module = AnsibleModule(
        argument_spec=dict(
            name=dict(required=True),
            subnet=dict(required=True)
        )
    )

    if not HAS_NETADDR:
        module.fail_json(msg='The netaddr python module is required')
    if not HAS_NETIFACES:
        module.fail_json(msg='The netifaces python module is required')

    name = module.params['name']
    subnet = module.params['subnet']

    result_interface = check_interfaces(name, subnet)
    if not result_interface['success']:
        module.fail_json(data_interface=result_interface['data'], msg='No interface in subnet %s' % subnet)

    module.exit_json(data_interface=result_interface['data'])


if __name__ == '__main__':
    main()