import requests
import datetime


class StickyPiston:
    def __init__(self):
        self.url = ""
        self.version = "v0.0.1a"
        self.last_version_check = datetime.datetime.utcnow()
        self.up_to_date = None

    def version_url(self) -> str:
        sep = '/' if self.url[-1] != '/' else ''
        return self.url + sep + 'piston_version'

    def check_for_updates(self):
        """Checks for any updates to the StickyPiston module."""
        self.last_version_check = datetime.datetime.utcnow()

        resp = requests.get(self.version_url())
        resp.raise_for_status()

        current_version = resp.json()['version']
        self.up_to_date = current_version.strip() == self.version.strip()

    def up_to_date(self) -> str:
        if not self.up_to_date:
            self.check_for_updates()
        if self.up_to_date():
            return "Up to date"
        return "New version available"

    def update(self, force: bool = False):
        if force or not self.up_to_date():
            # perform the update
            pass
        else:
            return 0