"""运行配置和环境变量。"""

from __future__ import annotations

import os
from pathlib import Path

BASE_DIR = Path(__file__).resolve().parent.parent
DB_PATH = Path(os.environ.get("GROUP_DB", BASE_DIR / "selfgroup.db"))
XLSX_PATH = Path(os.environ.get("GROUP_XLSX", BASE_DIR / "2025mt.xlsx"))
STATIC_DIR = BASE_DIR / "static"
TEACHER_USER = os.environ.get("TEACHER_USER", "teacher")
TEACHER_PASSWORD = os.environ.get("TEACHER_PASSWORD", "teacher!@#")
GROUP_LIMIT = 6
SESSION_DAYS = 7
MAX_JSON_BYTES = 1024 * 1024
MAX_UPLOAD_BYTES = 10 * 1024 * 1024