"""Configure dedicated eval run logs under repo ``logs/`` (see ``constants.EVAL_*_LOG_*``)."""

from __future__ import annotations

import logging
import sys

from .constants import EVAL_LOG_DIR, EVAL_LOG_FILE, EVAL_VERBOSE_LOG_DIR

_setup_done = False


def setup_eval_logging() -> None:
    """Attach file + stderr handlers to ``search_eval`` once; ensure log directories exist."""
    global _setup_done
    if _setup_done:
        return

    EVAL_LOG_DIR.mkdir(parents=True, exist_ok=True)
    EVAL_VERBOSE_LOG_DIR.mkdir(parents=True, exist_ok=True)

    fmt = logging.Formatter("%(asctime)s - %(levelname)s - %(name)s - %(message)s")
    root = logging.getLogger("search_eval")
    root.setLevel(logging.INFO)
    if root.handlers:
        _setup_done = True
        return
    fh = logging.FileHandler(EVAL_LOG_FILE, encoding="utf-8")
    fh.setFormatter(fmt)
    sh = logging.StreamHandler(sys.stderr)
    sh.setFormatter(fmt)
    root.addHandler(fh)
    root.addHandler(sh)
    root.propagate = False
    _setup_done = True