from sanic import Sanic
from sanic.response import text, json
from motor.motor_asyncio import AsyncIOMotorClient
import pymongo
import os

app = Sanic(__name__)

DOORBOY_SECRET = os.environ["DOORBOY_SECRET"]
MONGO_URI = os.getenv("MONGO_URI",
                      "mongodb://127.0.0.1:27017/default?replicaSet=rs0")

assert len(DOORBOY_SECRET) >= 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):
    if request.headers.get("KEY") != DOORBOY_SECRET:
        return text("how about no")
    allowed_names = []
    async for obj in app.ctx.db.member.find({"enabled": True}):
        allowed_names.append(obj["_id"])
    allowed_uids = []
    flt = {
        "token.uid_hash": {"$exists": True},
        "inventory.owner": {"$exists": True},
        "token.enabled": {"$exists": True}
    }
    prj = {
        "inventory.owner": True,
        "token.uid_hash": True
    }
    async for obj in app.ctx.db.inventory.find(flt, prj):
        if obj["inventory"].pop("owner").get("foreign_id") in allowed_names:
            del obj["_id"]
            del obj["inventory"]
            allowed_uids.append(obj)
    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")
    if request.headers.get("KEY") != DOORBOY_SECRET:
        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)