from pathlib import Path
from .TimeSlot import TimeSlot
import json


class DataStore:
    def __init__(self, filename: Path, create=False):
        self._filename = filename
        if create:
            self._time_slots = []
            self._write_update()
        else:
            with open(self._filename, "r") as f:
                self._time_slots = list(json.load(f))

    def _write_update(self):
        with open(self._filename, "w+") as f:
            json.dump(self._time_slots, f, default=vars)

    def add_time_slot(self, time_slot: TimeSlot):
        self._time_slots.append(time_slot)
        self._write_update()

    def remove_time_slot(self, time_slot: TimeSlot):
        self._time_slots.remove(time_slot)
        self._write_update()

    def get_all_time_slots(self):
        return self._time_slots[:]