"""
This is a standalone script to run a small switch based scenario and will not
interact with the GUI.
"""

import logging

from core.emulator.coreemu import CoreEmu
from core.emulator.emudata import IpPrefixes
from core.emulator.enumerations import EventTypes, NodeTypes

NODES = 2


def main():
    # ip generator for example
    prefixes = IpPrefixes(ip4_prefix="10.83.0.0/16")

    # create emulator instance for creating sessions and utility methods
    coreemu = CoreEmu()
    session = coreemu.create_session()

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

    # create switch network node
    switch = session.add_node(_type=NodeTypes.SWITCH, _id=100)

    # create nodes
    for _ in range(NODES):
        node = session.add_node()
        interface = prefixes.create_interface(node)
        session.add_link(node.id, switch.id, interface_one=interface)

    # instantiate session
    session.instantiate()

    # get nodes to run example
    first_node = session.get_node(1)
    last_node = session.get_node(NODES)
    address = prefixes.ip4_address(first_node)
    logging.info("node %s pinging %s", last_node.name, address)
    output = last_node.cmd(f"ping -c 3 {address}")
    logging.info(output)

    # shutdown session
    coreemu.shutdown()


if __name__ == "__main__":
    logging.basicConfig(level=logging.INFO)
    main()
