from functools import lru_cache
import json
import time
import urllib.request

from flask import Flask, jsonify

app = Flask(__name__)

@lru_cache(maxsize=1)
def get_jitsi_status(ttl_hash : int = 0) -> bool | None:
    # ttl_hash is used to cache the result for a certain amount of time.
    # This is done to rate-limit the outgoing requests to the jitsi server.
    # Inspired by https://stackoverflow.com/a/55900800

    # The jitsi server uses mod_census to provide a JSON representation of all
    # currently active rooms. We can use this to check if the lounge is currently
    # occupied.
    try:
        content = urllib.request.urlopen("https://talk.chaoswest.tv/room-census").read()
        census = json.loads(content)
        return any(room["room_name"] == "cws-lounge@muc.meet.jitsi" for room in census.get("room_census", []))
    except Exception as e:
        print("shit got fucked up:")
        print(e)
        return None


def get_ttl_hash(seconds : int = 1)  -> int:
    # Generates a monotonically increasing "hash" as time progresses
    return round(time.time() / seconds)


@app.route("/spaceapi")
def spaceapi():
    result = {
        'api': '0.13',
        'api_compatibility': ['14'],
        'space': 'chaoswest.tv',
        'logo': 'https://chaoswest.tv/logo.png',
        'url': 'https://chaoswest.tv',
        'location': {
            'lat': 50.47718,
            'lon': 12.33427,
            'address': 'FSN1-DC14',
        },
        'contact': {
            'mastodon': '@chaoswesttv@chaos.social',
        }
    }

    status = get_jitsi_status(get_ttl_hash())

    if status is not None:
        result["state"] = {
            'open': status
        }

    return jsonify(result)