from collections import OrderedDict
import pickle
import os


from config import SETTINGS_FILE_NAME


class ApplicationContext:

    def __init__(self):
        self.connections = OrderedDict()


class Connection:
    id = 0
    name = ''
    region = ''
    aws_secret_access_key = ''
    aws_access_key_id = ''

    def __init__(self):
        self.id = max(list(context.connections.keys()) + [0]) + 1

    def __hash__(self):
        return self.name.__hash__()

    def __cmp__(self, other):
        return self.name == other.name


def load_context(application):
    if not os.path.exists(SETTINGS_FILE_NAME):
        return
    with open(SETTINGS_FILE_NAME, 'rb') as file:
        application.context = pickle.load(file)


def save_context(application):
    with open(SETTINGS_FILE_NAME, 'wb') as file:
        pickle.dump(application.context, file)


context = ApplicationContext()
main_window = None
windows = []