import copy
import json
import os.path


default_json_file = os.path.abspath('default.json')
last_state_file = os.path.abspath('laststate.json')

default_json = {}
active_json = {}

def reload_json():
    global default_json
    global active_json

    default_json = json.load(open(default_json_file, encoding='utf-8'))

    if os.path.exists(last_state_file):
        with open(last_state_file, encoding='utf-8') as f:
            active_json = json.load(f)

        if os.path.getmtime(last_state_file) \
           < os.path.getmtime(default_json_file):
            backup = copy.deepcopy(active_json)
            active_json.update(default_json)
            active_json['state']['open'] = backup['state']['open']
            active_json['state']['lastchange'] = backup['state']['lastchange']
    else:
        active_json = copy.deepcopy(default_json)

reload_json()

def save_last_state():

    with open(last_state_file, mode='w', encoding='utf-8') as f:
        json.dump(active_json, f, sort_keys=True)