#!/usr/bin/python
#
# run iperf to measure the effective throughput between two nodes when
# n nodes are connected to a virtual wlan; run test for testsec
# and repeat for minnodes <= n <= maxnodes with a step size of
# nodestep

import datetime

import parser
from core.data import NodeData, LinkData
from core.enumerations import NodeTypes, EventTypes
from core.future.coreemu import FutureIpv4Prefix, CoreEmu


def example(nodes):
    # ip generator for example
    prefix = FutureIpv4Prefix("10.83.0.0/16")

    # create emulator instance for creating sessions and utility methods
    coreemu = globals()["coreemu"]
    session = coreemu.create_session(master=True)

    # must be in configuration state for nodes to start, when using "node_add" below
    session.set_state(EventTypes.CONFIGURATION_STATE.value)

    # create switch network node
    node_data = NodeData(node_type=NodeTypes.SWITCH.value)
    switch_id = session.node_add(node_data)

    # create nodes
    for _ in xrange(nodes):
        node_data = NodeData(node_type=NodeTypes.DEFAULT.value)
        node_id = session.node_add(node_data)
        node = session.get_object(node_id)
        inteface_index = node.newifindex()
        address = prefix.addr(node_id)
        link_data = LinkData(
            node1_id=node_id,
            node2_id=switch_id,
            interface1_id=inteface_index,
            interface1_ip4=str(address),
            interface1_ip4_mask=prefix.prefixlen,
        )
        session.link_add(link_data)

    # instantiate session
    session.instantiate()


if __name__ in {"__main__", "__builtin__"}:
    example(2)