from __future__ import annotations

import logging
import os
import sys

from app.config import ConfigError, load_config
from app.scheduler import run_forever

logger = logging.getLogger("uptime_monitor")


def setup_logging() -> None:
    logging.basicConfig(
        level=os.environ.get("LOG_LEVEL", "INFO"),
        format="%(asctime)s %(levelname)s %(name)s: %(message)s",
        stream=sys.stdout,
    )


def main() -> None:
    setup_logging()
    config_path = os.environ.get("CONFIG_PATH", "/config/config.yaml")

    try:
        cfg = load_config(config_path)
    except ConfigError as e:
        logger.error("configuration error: %s", e)
        sys.exit(1)

    logger.info(
        "loaded %d endpoint(s) from %s; interval=%ss, immediate recheck on failure enabled",
        len(cfg.endpoints), config_path, cfg.check.interval_seconds,
    )

    run_forever(cfg)


if __name__ == "__main__":
    main()