from data import getUsers, getChannels
from error import InputError
import re

def users_all(token):
    """
    Returns a list of all users and their associated details
    :param token: token for authentication purpose
    :return: users with their associated details
    """

    if token is None or not isinstance(token, str):
        raise InputError("Token should be a string")

    return getUsers()


def search(token, query_str):
    """
    Given a query string, return a collection of messages in all of the channels that
    the user has joined that match the query
    :param token: token for authentication purpose
    :param query_str: query string key used for searching
    :return: messages that match the query
    """

    if token is None or not isinstance(token, str):
        raise InputError("Token should be a string")

    if query_str is None or not isinstance(token, str):
        raise InputError("Query string should be a string")

    channels = getChannels()
    messages = []
    for channel_id, channel in channels.items():
        members = channel['all_members']
        for member_id, member in members.items():
            if member['token'] == token:
                message = getChannelMessage(channel, member)
                if re.findall(query_str, message):
                    messages.append(message)
    return messages