import config
from django.conf import settings
from django.utils.translation import gettext as _
import importlib

USERS_SELF_REGISTRATION = "USERS_SELF_REGISTRATION"
USERS_MAIL_VALIDATION = "USERS_MAIL_VALIDATION"
USERS_ADMIN_ACTIVATION = "USERS_ADMIN_ACTIVATION"

USERS_PROFILE_ADDITIONS = "USERS_PROFILE_ADDITIONS"


DEFAULTS = {
    USERS_SELF_REGISTRATION: False,
    USERS_MAIL_VALIDATION: True,
    USERS_ADMIN_ACTIVATION: True,
    USERS_PROFILE_ADDITIONS: {},
}

def __get_object_by_name__(object_name):
    class_data = object_name.split(".")
    module_path = ".".join(class_data[:-1])
    class_str = class_data[-1]
    #
    module = importlib.import_module(module_path)
    return getattr(module, class_str)

def get(key):
    # take data from config, settings or defaults
    try:
        data = getattr(config, key)
    except AttributeError:
        try:
            data = getattr(settings, key)
        except AttributeError:
            data = DEFAULTS.get(key)
    if key in [USERS_PROFILE_ADDITIONS, ]:
        # Change given string to object
        return {key: __get_object_by_name__(data[key]) for key in data}
    #
    return data


def registration_flow_description(username):
    if not get(USERS_MAIL_VALIDATION) and not get(USERS_ADMIN_ACTIVATION):
        return _("Your account has been created. You are now able to Login as %s.") % username
    elif get(USERS_MAIL_VALIDATION) and get(USERS_ADMIN_ACTIVATION):
        return _("Your account has been created. You'll get an email to validate your account. Then you have to wait for the activation by an administrator.")
    elif get(USERS_MAIL_VALIDATION):
        return _("Your account has been created. You'll get an email to validate your account. After validation you are able to Login as %s.") % username
    else:
        return _("Your account has been created. You have to wait for the activation by an administrator.")