from firebase_admin import db as fbdb
from threading import Thread
from tornado.ioloop import IOLoop
import logging as log


class Calibrations(object):
    TOLERANCE_RATE = 0.6
    THRESHOLD = 10
    FALL_TOLERANCE = 0

    def __init__(self, device_id):
        self.dev_ref = fbdb.reference('devices').child(device_id)
        self.calibrations_ref = self.dev_ref.child('calibrations')
        self.thread = None
        self.listener = None
        self.items = {}

    def get(self, station):
        calref = self.calibrations_ref.child(station)

        try:
            remote = calref.get()
        except fbdb.ApiCallError as err:
            log.error(err)
            remote = None

        local  = self.items.get(station, None)

        if not remote and not local:
            calibration = {
                'tolerance': self.TOLERANCE_RATE,
                'threshold': self.THRESHOLD,
                'fallTolerance': self.FALL_TOLERANCE,
            }

        elif not remote and local:
            calibration = {
                'tolerance': self.TOLERANCE_RATE,
                'threshold': self.THRESHOLD,
                'fallTolerance': self.FALL_TOLERANCE,
            }

        else:
            calibration = {
                'tolerance': remote.get(
                    'tolerance',
                    self.TOLERANCE_RATE,
                ),
                'threshold': remote.get(
                    'threshold',
                    self.THRESHOLD,
                ),
                'fallTolerance': remote.get(
                    'fallTolerance',
                    self.FALL_TOLERANCE,
                )
            }

        self.items[station] = calibration

        return self.items[station]