from typing import Dict
import re
import numpy as np

commands: Dict = {}


def command(*commandlist):
    def add_command(function):
        for command in commandlist:
            commands[command] = function
        return function
    return add_command


def handle_command(kwargs):
    c = kwargs['message'].split()[0]
    params = kwargs['message'].replace(c, '')
    params = re.sub(r'\s+', '', params)

    if c in commands:
        commands[c](kwargs, params)
    else:
        error_response(kwargs, params)


@command('/roll')
def custom_roll(kwargs, params):
    pattern = re.compile('(?P<sign>(?:\+|\-)?)(?P<dice_num>\d+)(?i:d)(?P<dice_val>\d+)(?P<maths>(?:(?:\+|\-)\d+)*(?!(?i:d)))')
    rolls = re.findall(pattern, params)

    rng = np.random.default_rng()
    results = []
    for roll in rolls:
        result = []
        if int(roll[2]) < 2:
            result.append(int(roll[2]))
        else:
            result.append(rng.integers(1, int(roll[2]), size=int(roll[1])).tolist())
        result.append(roll[3])
        results.append(result)
    print(results)
    print(f'/roll received {kwargs}. Roll parameters: {params}. Rolls recognized: {rolls}')


def error_response(kwargs, params):
    print(f'Error, received unknown command: {kwargs}')