"""配置管理 - 环境变量 + 默认值"""
import os
from pathlib import Path

# 项目根目录
BASE_DIR = Path(__file__).parent
DATA_DIR = Path(os.getenv("DATA_DIR", "/app/data"))
DATA_DIR.mkdir(parents=True, exist_ok=True)

# 数据库
DATABASE_URL = os.getenv("DATABASE_URL", str(DATA_DIR / "rsskeeper.db"))

# RSS 抓取配置
FETCH_CONCURRENCY = int(os.getenv("FETCH_CONCURRENCY", "10"))
FETCH_TIMEOUT = int(os.getenv("FETCH_TIMEOUT", "30"))
DEFAULT_FETCH_INTERVAL = int(os.getenv("DEFAULT_FETCH_INTERVAL", "60"))  # 分钟
MIN_FETCH_INTERVAL = int(os.getenv("MIN_FETCH_INTERVAL", "15"))  # 最小间隔15分钟

# 内容处理
MAX_ARTICLE_CONTENT_LENGTH = int(os.getenv("MAX_ARTICLE_CONTENT_LENGTH", "50000"))
MAX_SUMMARY_LENGTH = int(os.getenv("MAX_SUMMARY_LENGTH", "500"))
ARTICLE_RETENTION_DAYS = int(os.getenv("ARTICLE_RETENTION_DAYS", "0"))  # 0 = 永久保留

# API 配置
API_PREFIX = "/api"
EXTERNAL_API_PREFIX = "/api/v1/external"