from flask import request, current_app, Response
from flask_classful import FlaskView
from db import redis_client


class LogView(FlaskView):

    def post(self):
        # Record the IP address of the producer
        remote_uuid = request.json['uuid']
        remote_ip = request.remote_addr

        prod_key = f"producer_{remote_uuid}"

        last_known_remote_ip = redis_client.get(prod_key)
        if last_known_remote_ip:
            last_known_remote_ip = last_known_remote_ip.decode('utf-8')

        if not last_known_remote_ip:
            current_app.logger.info(f"New producer {remote_uuid} at {remote_ip}")
        elif last_known_remote_ip != remote_ip:
            current_app.logger.info(
                f"IP address of producer {remote_uuid} have changed: {last_known_remote_ip} -> {remote_ip}")

        # update expirity
        redis_client.set(prod_key, remote_ip.encode('utf-8'))
        redis_client.expire(prod_key, current_app.config["PRODUCER_TIMEOUT"])

        # print out message
        current_app.logger.info(f"New message: {request.json['message']}")

        # return HTTP 204 - No content message
        return Response(status = 204)