import config
from django.conf import settings
import importlib
import os

MYCREOLE_ATTACHMENT_ACCESS = "MYCREOLE_ATTACHMENT_ACCESS"
ACCESS_READ = 'read'
ACCESS_MODIFY = 'modify'
MYCREOLE_BAR = "MYCREOLE_BAR"
BAR_MENUBAR = "menubar"
BAR_NAVIBAR = "navibar"
MYCREOLE_ROOT = "MYCREOLE_ROOT"


def no_access(*args, **kwargs):
    return False


DEFAULTS = {
    MYCREOLE_ATTACHMENT_ACCESS: {
        ACCESS_READ: 'mycreole.parameter.no_access',
        ACCESS_MODIFY: 'mycreole.parameter.no_access',
    },
    MYCREOLE_BAR: {
        BAR_MENUBAR: None,
        BAR_NAVIBAR: None,
    },
    MYCREOLE_ROOT: os.path.join(settings.BASE_DIR, 'data', 'mycreole'),
}


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)
    # adapt the data
    if key in [MYCREOLE_BAR, MYCREOLE_ATTACHMENT_ACCESS]:
        # Change given string to object
        rv = {}
        for skey in DEFAULTS[key]:
            # take the value from data or the default
            if skey in data:
                value = data[skey]
            else:
                value = DEFAULTS[key][skey]
            # take the object or None
            if value is not None:
                rv[skey] = __get_object_by_name__(value)
            else:
                rv[skey] = None
        return rv
    return data