set -u
DIR=/data/pms/api-server
echo "############ /data/pms/api-server 清理前 ############"
ls -la "$DIR"
echo "--- 目录占用 ---"
du -sh "$DIR"
echo "--- 当前运行中的二进制（绝不能碰）---"
systemctl show -p ExecStart --value pms-api
MAINPID=$(systemctl show -p MainPID --value pms-api)
echo "MainPID=$MAINPID  exe=$(readlink -f /proc/$MAINPID/exe 2>/dev/null)"
RUNNING=$(readlink -f /proc/$MAINPID/exe 2>/dev/null)

echo
echo "############ 候选清单（历史二进制，排除当前 pms-api / .env / uploads / exports）############"
# 候选 = 该目录下的普通文件，且名字以 api-server 或 pms-api.bak 开头（严格白名单前缀）
cands=()
for f in "$DIR"/*; do
  if [ -f "$f" ]; then
    b=$(basename "$f")
    case "$b" in
      api-server|api-server.bak|api-server_old|pms-api.bak*|api-server*) cands+=( "$f" ) ;;
    esac
  fi
done
# 按 mtime 从新到旧排序
mapfile -t sorted < <(for f in "${cands[@]}"; do stat -c '%Y %n' "$f"; done | sort -rn | awk '{print $2}')
KEEP=2
echo "  候选（新→旧）:"
for f in "${sorted[@]}"; do
  echo "    $(stat -c '%y %s %n' "$f")"
done
echo "  保留最近 $KEEP 个:"
for ((i=0;i<KEEP && i<${#sorted[@]};i++)); do echo "    ${sorted[$i]}"; done
echo "  将删除:"
for ((i=KEEP;i<${#sorted[@]};i++)); do echo "    ${sorted[$i]}"; done

echo
echo "############ 执行删除 ############"
for ((i=KEEP;i<${#sorted[@]};i++)); do
  f="${sorted[$i]}"
  if [ "$(readlink -f "$f")" = "$RUNNING" ]; then
    echo "  [skip] 正在运行的二进制，拒绝删除: $f"
    continue
  fi
  case "$(basename "$f")" in
    pms-api) echo "  [skip] 当前二进制 pms-api，拒绝删除"; continue ;;
  esac
  rm -f -- "$f"
  echo "  已删除 $f"
done

echo
echo "############ 清理后 ############"
ls -la "$DIR"
du -sh "$DIR"
echo "--- 服务仍在运行 ---"
systemctl is-active pms-api