#!/usr/bin/env python3

import sys
import time


def run_help():
    print("usage: xfile <command>")
    print("commands:", ", ".join(COMMANDS))


def run_build():
    print("Building the project takes some time...")
    time.sleep(10)
    print("Done!")


def run_test():
    run_build()
    print("Testing takes even more time...")
    time.sleep(20)
    print("Done!")


COMMANDS = {
    "help": run_help,
    "build": run_build,
    "test": run_test,
}


def main():
    if len(sys.argv) > 1:
        cmd = sys.argv[1]
    else:
        cmd = "help"
    try:
        run = COMMANDS[cmd]
    except KeyError:
        print(f"invalid command: `{cmd}`")
        print("valid commands are:", ", ".join(COMMANDS))
        sys.exit(1)
    else:
        run()


if __name__ == "__main__":
    main()