import re
import time
import cli

def get_serial():
    """Extract the router serial number"""
    output = cli.execute("show version | include Processor board ID")

    match = re.search(r'(\w+)$', output)

    if match:
        board_id = match.group(1)
        return board_id
    else:
        return "UNKNOWN"

print(f"Getting serial number...")
serial = get_serial()
print(f"Device serial number: {serial}")

print(f"Applying license...")
cli.configurep(["license boot level network-advantage addon dna-advantage"])

print(f"Retrieving full configuration...")
cli.executep("copy http://192.168.30.5/{serial}.txt running-config")

print(f"Saving configuration...")
cli.executep("write mem")

print(f"Reloading...")
time.sleep(10)
cli.executep("reload")