import os

import requests
from pymongo.errors import PyMongoError
from requests.exceptions import RequestException
from sanic import Blueprint

slack_app = Blueprint("slack", __name__)

# webhook logs to private channel or "DEV" to print to console.
SLACK_DOORLOG_CALLBACK = os.environ["SLACK_DOORLOG_CALLBACK"]

def slack_post(msg):
    if SLACK_DOORLOG_CALLBACK == "DEV":
        print(f"[DEV SLACK]: {msg}")
        return

    try:
        requests.post(SLACK_DOORLOG_CALLBACK, json={"text": msg}).raise_for_status()
    except RequestException as e:
        print(f"[SLACK]: {e}")


def approvedStr(approved: bool) -> str:
    if approved:
        return "Permitted"

    return "Denied"


# consumes SLACK_DOORLOG_CALLBACK and app.ctx.db
async def slack_log(app, loop):
    pipeline = [
        {
            "$match": {
                "operationType": "insert",
            }
        }
    ]
    while True:
        try:
            async with app.ctx.db.eventlog.watch(pipeline) as stream:
                async for event in stream:
                    ev = event["fullDocument"]

                    msg = "%s %s access for %s via %s" % (
                        approvedStr(ev["approved"]),
                        ev["door"],
                        ev["user"]["name"],
                        ev("method"),
                    )
                    slack_post(msg)

        except PyMongoError as e:
            print(e)