"""
world_fire.py — the world on fire. Live wildfires.

Pulls open wildfire events worldwide from NASA's EONET (Earth Observatory
Natural Event Tracker — free, no key). The count is a slow burn; each newly
detected fire is a flare-up you can trigger on. The elemental fire of the set —
bushfires, forest fires, the literal heat of the planet.

Emits:
  /gs/fire/count   number of open wildfire events worldwide
  /gs/fire/event   fired when a new wildfire is detected (magnitude 1)
"""

from __future__ import annotations
import argparse
import json
import time
import urllib.request

from pythonosc.udp_client import SimpleUDPClient

URL = ("https://eonet.gsfc.nasa.gov/api/v3/events"
       "?category=wildfires&status=open&limit=500")
UA = "Godstrument/1.0 (live instrument)"


def fetch():
    req = urllib.request.Request(URL, headers={"User-Agent": UA})
    with urllib.request.urlopen(req, timeout=30) as r:
        return json.load(r).get("events", [])


def main():
    ap = argparse.ArgumentParser()
    ap.add_argument("--host", default="127.0.0.1")
    ap.add_argument("--port", type=int, default=9000)
    ap.add_argument("--poll", type=float, default=600.0)
    args = ap.parse_args()

    client = SimpleUDPClient(args.host, args.port)
    print(f"[fire] emitting /gs/fire/count|event (NASA EONET wildfires) "
          f"(re-query every {args.poll:g}s)")

    seen: set[str] = set()
    count = 0
    first = True
    next_poll, retry = 0.0, 60.0
    while True:
        if time.time() >= next_poll:
            try:
                events = fetch()
                count = len(events)
                for e in events:
                    eid = e.get("id")
                    if eid and eid not in seen:
                        seen.add(eid)
                        if not first:                # no burst on the first load
                            client.send_message("/gs/fire/event", 1.0)
                            print(f"  🔥 {e.get('title', 'wildfire')}")
                print(f"  {count} wildfires burning worldwide")
                first = False
                next_poll, retry = time.time() + args.poll, 60.0
            except Exception as e:  # noqa
                print(f"[fire] warn: {e}; retry in {retry:.0f}s")
                next_poll = time.time() + retry
                retry = min(retry * 2, args.poll)
        client.send_message("/gs/fire/count", float(count))
        time.sleep(10.0)


if __name__ == "__main__":
    main()