import pocket_friends
import json


class SaveData:
    """
    Class that represents the save data of the game.
    """

    def __init__(self):
        """
        Constructs the object with all starting values.
        """
        # Attributes that are saved to a file to recover upon startup.
        self.attributes = {
            'version': pocket_friends.__version__,
            'time_elapsed': 0,
            'bloop': '',
            'age': 0,
            'health': 0,
            'hunger': 0,
            'happiness': 0,
            'care_counter': 0,
            'missed_care': 0,
            'adult': 0,
            'evolution_stage': '',
        }

        # Frame counter
        self.frames_passed = 0

    def write_save(self):
        """
        Writes attributes of the save object to "save.json" file.
        """
        with open(save_dir + '/save.json', 'w') as save_file:
            json.dump(self.attributes, save_file)
            save_file.close()

    def read_save(self):
        """
        Reads from "save.json" and inserts into the save object's attributes dictionary. Creates file if it does not
        exist.
        """
        # Open up the save file and read it into self.attributes.
        try:
            with open(save_dir + '/save.json', 'r') as save_file:
                self.attributes = json.load(save_file)
                save_file.close()

        # If there is no save file, write one with the defaults.
        except FileNotFoundError:
            self.write_save()