#!/usr/bin/env python3
from sanic import Sanic
from sanic.response import text, json
from sanic_prometheus import monitor
from motor.motor_asyncio import AsyncIOMotorClient
import httpx
import pymongo
import os

app = Sanic(__name__)
monitor(app).expose_endpoint()

INVENTORY_API_KEY = os.environ["INVENTORY_API_KEY"]
DOORBOY_SECRET_FLOOR = os.environ["DOORBOY_SECRET_FLOOR"]
DOORBOY_SECRET_WORKSHOP = os.environ["DOORBOY_SECRET_WORKSHOP"]
CARD_URI = os.environ["CARD_URI"]
FLOOR_ACCESS_GROUP = os.environ["FLOOR_ACCESS_GROUP"]
WORKSHOP_ACCESS_GROUP = os.environ["WORKSHOP_ACCESS_GROUP"]
MONGO_URI = os.getenv("MONGO_URI",
                      "mongodb://127.0.0.1:27017/default?replicaSet=rs0")

assert len(DOORBOY_SECRET_FLOOR) >= 10
assert len(DOORBOY_SECRET_WORKSHOP) >= 10


@app.listener("before_server_start")
async def setup_db(app, loop):
    # TODO: find cleaner way to do this, for more see
    # https://github.com/sanic-org/sanic/issues/919
    app.ctx.db = AsyncIOMotorClient(MONGO_URI).get_default_database()

@app.route("/allowed")
async def view_doorboy_uids(request):
    key = request.headers.get("KEY")
    if not key or key not in [DOORBOY_SECRET_FLOOR, DOORBOY_SECRET_WORKSHOP]:
        return text("how about no")

    if key == DOORBOY_SECRET_FLOOR:
        group = FLOOR_ACCESS_GROUP
    elif key == DOORBOY_SECRET_WORKSHOP:
        group = WORKSHOP_ACCESS_GROUP
    if not group:
        return "fail", 500
    async with httpx.AsyncClient() as client:
        r = await client.post(CARD_URI, json={
            "groups": [group]
        }, headers={
            "Content-Type": "application/json",
            "Authorization": f"Basic {INVENTORY_API_KEY}"
        })
    j = r.json()
    allowed_uids = []
    for obj in j:
        allowed_uids.append({
            "token": obj["token"]
        })
    return json({"allowed_uids": allowed_uids})


@app.route("/longpoll", stream=True)
async def view_longpoll(request):
    response = await request.respond(content_type="text/event-stream")
    key = request.headers.get("KEY")
    if not key or key not in [DOORBOY_SECRET_FLOOR, DOORBOY_SECRET_WORKSHOP]:
        return text("Invalid token")

    await response.send("data: response-generator-started\n\n")
    pipeline = [
        {
            "$match": {
                 "operationType": "insert",
             }
        }
    ]
    try:
        async with app.ctx.db.eventlog.watch(pipeline) as stream:
            await response.send("data: watch-stream-opened\n\n")
            async for event in stream:
                if event["fullDocument"].get("type") == "open-door":
                    await response.send("data: %s\n\n" %
                                        event["fullDocument"]["door"])
    except pymongo.errors.PyMongoError:
        return


if __name__ == "__main__":
    app.run(debug=False, host="0.0.0.0", port=5000, single_process=True, access_log=True)