"""Fetch the last N lines of the node container log."""
import json, os, sys, time, urllib.request
st = json.load(open("deploy/.node.json")); key = os.environ["VAST_API_KEY"]
req = urllib.request.Request(f"https://console.vast.ai/api/v0/instances/request_logs/{st['instance_id']}/",
    data=json.dumps({"tail": sys.argv[1] if len(sys.argv) > 1 else "30"}).encode(), method="PUT",
    headers={"Authorization": f"Bearer {key}", "Content-Type": "application/json"})
r = json.load(urllib.request.urlopen(req, timeout=30)); u = r.get("result_url") or r.get("temp_download_url")
for _ in range(6):
    time.sleep(5)
    try: print(urllib.request.urlopen(u, timeout=30).read().decode()[-2500:]); break
    except Exception: pass