##########################################################
# This RNS example demonstrates a minimal setup, that    #
# will start up the Reticulum Network Stack, generate a  #
# new destination, and let the user send an announce.    #
##########################################################

import argparse
import RNS

# Let's define an app name. We'll use this for all
# destinations we create. Since this basic example
# is part of a range of example utilities, we'll put
# them all within the app namespace "example_utilities"
APP_NAME = "example_utilities"

# This initialisation is executed when the program is started
def program_setup(configpath):
    # We must first initialise Reticulum
    reticulum = RNS.Reticulum(configpath)

    # Randomly create a new identity for our example
    identity = RNS.Identity()

    # Using the identity we just created, we create a destination.
    # Destinations are endpoints in Reticulum, that can be addressed
    # and communicated with. Destinations can also announce their
    # existence, which will let the network know they are reachable
    # and automatically create paths to them, from anywhere else
    # in the network.
    destination = RNS.Destination(
        identity,
        RNS.Destination.IN,
        RNS.Destination.SINGLE,
        APP_NAME,
        "minimalsample"
    )

    # We configure the destination to automatically prove all
    # packets addressed to it. By doing this, RNS will automatically
    # generate a proof for each incoming packet and transmit it
    # back to the sender of that packet. This will let anyone that
    # tries to communicate with the destination know whether their
    # communication was received correctly.
    destination.set_proof_strategy(RNS.Destination.PROVE_ALL)

    # Everything's ready!
    # Let's hand over control to the announce loop
    announceLoop(destination)


def announceLoop(destination):
    # Let the user know that everything is ready
    RNS.log(
        "Minimal example "+
        RNS.prettyhexrep(destination.hash)+
        " running, hit enter to manually send an announce (Ctrl-C to quit)"
    )

    # We enter a loop that runs until the users exits.
    # If the user hits enter, we will announce our server
    # destination on the network, which will let clients
    # know how to create messages directed towards it.
    while True:
        entered = input()
        destination.announce()
        RNS.log(f"Sent announce from {RNS.prettyhexrep(destination.hash)}")


##########################################################
#### Program Startup #####################################
##########################################################

# This part of the program gets run at startup,
# and parses input from the user, and then starts
# the desired program mode.
if __name__ == "__main__":
    try:
        parser = argparse.ArgumentParser(
            description="Minimal example to start Reticulum and create a destination"
        )

        parser.add_argument(
            "--config",
            action="store",
            default=None,
            help="path to alternative Reticulum config directory",
            type=str
        )

        args = parser.parse_args()

        if args.config:
            configarg = args.config
        else:
            configarg = None

        program_setup(configarg)

    except KeyboardInterrupt:
        print("")
        exit()