from .commands import commands

def display_help(extra_args):
    """
    Display help dialogues for each command
    """
    if not extra_args:
        print(f"{commands['help'].description}")
        return
    if len(extra_args) > 1:
        raise ValueError("Invalid arguments for help command")
    if extra_args[0] not in commands:
        raise ValueError("Unknown command")
    print(f"{commands[extra_args[0]].description}")

def run(command, args):
    """
    Runs a given command with the provided args
    Alsso automatically maps the given command string to the correct Command class
    """
    if command not in commands:
        raise ValueError("Invalid Command")

    c = commands[command]

    if args and c.args > len(args):
        raise ValueError("Too many arguments")
    if args and c.args < len(args) and not c.optional:
        raise ValueError("Missing arguments")

    if command == "help":
        display_help(args)
        return

    c.func(args)