#!/usr/bin/env python3
"""Scheduler loop for the news summarizer — every NEWS_SUMMARIZE_INTERVAL_S.

Default 900s (15 minutes). Serial: a slow LLM pass never overlaps the next.

Env (all optional, 12-factor):
  NEWS_SUMMARIZE_INTERVAL_S    seconds between runs (default 900)
  NEWS_SUMMARIZE_RUN_ON_START  "1" to summarize once immediately on boot (default 1)
  NOUS_API_KEY                 optional in env; Keys UI / api_keys also works
"""

from __future__ import annotations

import datetime
import logging
import os
import subprocess
import sys
import time

logging.basicConfig(level=logging.INFO, format="%(asctime)s %(levelname)s %(name)s: %(message)s")
logger = logging.getLogger("news.summarizer.scheduler")

INTERVAL_S = max(1, int(os.getenv("NEWS_SUMMARIZE_INTERVAL_S", "900")))
RUN_ON_START = os.getenv("NEWS_SUMMARIZE_RUN_ON_START", "1").lower() in ("1", "true", "yes")


def run_summarize() -> None:
    logger.info("summarize starting at %s", datetime.datetime.now().isoformat(timespec="seconds"))
    try:
        proc = subprocess.run([sys.executable, "summarizer.py"], cwd="/app")
        logger.info("summarize finished rc=%s", proc.returncode)
    except Exception:  # noqa: BLE001 — keep the loop alive across failures
        logger.exception("summarize failed")


def main() -> None:
    if not os.getenv("NOUS_API_KEY", "").strip():
        logger.warning(
            "NOUS_API_KEY unset in env — will read api_keys on each run; idle if both empty"
        )
    logger.info(
        "news summarizer loop starting (interval_s=%s, run_on_start=%s)",
        INTERVAL_S, RUN_ON_START,
    )
    if RUN_ON_START:
        run_summarize()
    while True:
        logger.info("next summarize in %ss", INTERVAL_S)
        time.sleep(INTERVAL_S)
        run_summarize()


if __name__ == "__main__":
    sys.exit(main())