from util import hook


@hook.command
def help(inp, bot=None, pm=None):
    ".help [command] -- gives a list of commands/help for a command"

    funcs = {}
    for command, (func, args) in bot.commands.iteritems():
        if func.__doc__ is not None:
            if func in funcs:
                if len(funcs[func]) < len(command):
                    funcs[func] = command
            else:
                funcs[func] = command

    commands = dict((value, key) for key, value in funcs.iteritems())

    if not inp:
        pm('available commands: ' + ' '.join(sorted(commands)))
    else:
        if inp in commands:
            pm(commands[inp].__doc__)