import json

import tornado

from core.utils import serialize_everything


class V1GoneHandler(tornado.web.RequestHandler):
    """Returns 410 Gone with a message for any endpoints in the old API that have breaking changes in the new one or
    have been retired."""

    def post(self):
        self.set_status(410)
        self.write(json.dumps(
            "This API endpoint has a breaking change or has been removed in the current version of the Spothole API. Please see /apidocs for details of the current API version and the endpoints available.",
            default=serialize_everything
        ))
        self.set_header("Cache-Control", "no-store")
        self.set_header("Content-Type", "application/json")


class V1RedirectHandler(tornado.web.RequestHandler):
    """Returns 308 Permanent Redirect from any path in the old API to the new one, where there were no breaking changes."""

    def get(self, path):
        new_url = "/api/v2/" + path
        if self.request.query:
            new_url += "?" + self.request.query
        self.set_status(308)
        self.set_header("Location", new_url)
        self.finish()