from lxml import etree
from netconf import util
from pyangbind.lib.serialise import pybindIETFXMLEncoder

from openconfig.components import components
from openconfig.interfaces import interfaces

def get_device_definition():
    occ = components()
    port_1_1 = occ.component.add("1/1")
    port_1_1.state._set_type("PORT") # state.type is read-only; use special method to set it

    port_1_2 = occ.component.add("1/2")
    port_1_2.state._set_type("PORT") # state.type is read-only; use special method to set it

    port_1_3 = occ.component.add("1/3")
    port_1_3.state._set_type("PORT") # state.type is read-only; use special method to set it

    ocif = interfaces()

    data = util.elm("nc:data")
    data.append(etree.XML(pybindIETFXMLEncoder.serialise(occ)))
    data.append(etree.XML(pybindIETFXMLEncoder.serialise(ocif)))
    return data