#!/usr/bin/env bash
# cron 래퍼 공통 — 프로젝트 루트, PYTHONPATH, 인터프리터 탐색.
# shellcheck disable=SC2034
set -euo pipefail

_CRON_SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
CRON_PROJECT_ROOT="$(cd "${_CRON_SCRIPT_DIR}/.." && pwd)"
cd "${CRON_PROJECT_ROOT}"
export PYTHONPATH=src

# 로그 디렉터리 (cron 리다이렉트 전에 mkdir -p 가능)
ensure_cron_log_dir() {
  local dir="$1"
  mkdir -p "$dir"
}

# python-dotenv + pandas 등 프로젝트 의존성이 있는 python3
resolve_bithumb_python() {
  local candidate=""
  for candidate in \
    "${BITHUMB_PYTHON:-}" \
    "${HOME}/opt/anaconda3/envs/coin/bin/python3" \
    "${HOME}/opt/anaconda3/envs/ncue/bin/python3" \
    "${HOME}/miniconda3/envs/xavis/bin/python3" \
    "$(command -v python3 2>/dev/null || true)"; do
    if [ -n "$candidate" ] && [ -x "$candidate" ] \
      && "$candidate" -c "import dotenv" 2>/dev/null; then
      echo "$candidate"
      return 0
    fi
  done
  echo "$(date '+%Y-%m-%d %H:%M:%S') [ERROR] python-dotenv 가능한 python3를 찾지 못함 (BITHUMB_PYTHON 설정)" >&2
  return 1
}

# mkdir 기반 잠금 — stale/hung 프로세스 정리 후 획득
# 사용: acquire_cron_lock LOCKDIR pgrep_pattern MAX_AGE_SEC
acquire_cron_lock() {
  local lockdir="$1"
  local pgrep_pattern="$2"
  local max_age_sec="${3:-900}"
  local now_ts pid elapsed lock_mtime

  now_ts="$(date +%s)"
  if [ -d "$lockdir" ]; then
    lock_mtime="$(stat -f %m "$lockdir" 2>/dev/null || stat -c %Y "$lockdir" 2>/dev/null || echo 0)"
    elapsed=$((now_ts - lock_mtime))
    if pgrep -f "$pgrep_pattern" >/dev/null 2>&1; then
      if [ "$elapsed" -gt "$max_age_sec" ]; then
        echo "$(date '+%Y-%m-%d %H:%M:%S') [WARN] hung ${pgrep_pattern} (${elapsed}s) — 종료 후 lock 정리" >&2
        pkill -f "$pgrep_pattern" 2>/dev/null || true
        sleep 1
      fi
    fi
    if ! pgrep -f "$pgrep_pattern" >/dev/null 2>&1; then
      echo "$(date '+%Y-%m-%d %H:%M:%S') [WARN] stale lock 정리: ${lockdir}" >&2
      rmdir "$lockdir" 2>/dev/null || true
    fi
  fi

  if ! mkdir "$lockdir" 2>/dev/null; then
    echo "$(date '+%Y-%m-%d %H:%M:%S') [SKIP] ${pgrep_pattern} 실행 중 (lock ${lockdir})" >&2
    return 1
  fi
  trap 'rmdir "'"$lockdir"'" 2>/dev/null || true' EXIT INT TERM
  return 0
}