import shelve
import datetime

DBFILE = "config.shelve"

class Configuration():
    """
    This class holds persistent configuration:
     - appkey: the app key, alowing traffic with the backend
     - last_key_validation_date: last date the appkey was validated, should be no more than a week ago otherwise the app will not run
     - user: the user as a dict
     - userlang: the users language
     - lastlogin_date: date of last sucessful login
    """
    loaded = False
    data = {}

    def __init__(self, app):
        self.app = app
        self.load()

    def load(self):
        path = self.app.paths.config / DBFILE
        if path.exists():
            shelve_file = shelve.open(path)
            self.data = shelve_file['data']
            shelve_file.close()
        print("shelve opened")
        print(self.data)

    def save(self):
        shelve_file = shelve.open(self.app.paths.config / DBFILE)
        shelve_file['data'] = self.data
        shelve_file.close()
        print("shelve stored")


    def has_valid_app_key(self):
        return True
        if 'appkey' in self.data:
            today = datetime.date.today()
            last_month = today - datetime.timedelta(days=30)
            if self.data['last_key_validation_date'] > last_month:
                self.data['last_key_validation_date'] = today
                return True
        return False

    def store_app_key(self, new_key):
        self.data['appkey'] = new_key
        self.data['last_key_validation_date'] = datetime.date.today()
        self.save()

    def user_is_logged_in(self):
        # return True
        if 'user' in self.data:
            print(f"found user {self.data['user']['name']}")
            today = datetime.date.today()
            last_week = today - datetime.timedelta(days=7)
            if self.data['lastlogin_date'] > last_week:
                self.update_last_activity_date()
                return True
        return False
    
    def store_login(self, user_dict):
        self.data['user'] = user_dict
        self.data['lastlogin_date'] = datetime.date.today()
        self.save()
    
    def update_last_activity_date(self):
        today = datetime.date.today()
        self.data['last_key_validation_date'] = today
        self.data['lastlogin_date'] = today

    def logout_user(self):
        self.data.pop('user', None)
        self.data.pop('lastlogin_date', None)
        self.save()         

    def get_userid(self):
        result = 0
        if 'user' in self.data:
            print()
            result = self.data['user']['id']
        return result