"""
数据库配置
"""
from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
from app.core.config import settings

# 创建数据库引擎（MySQL）
engine = create_engine(
    settings.DATABASE_URL,
    pool_pre_ping=True,
    pool_size=10,
    max_overflow=20,
    echo=settings.DEBUG  # 开发环境显示SQL
)

# 创建会话工厂
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

# 创建基础模型类
Base = declarative_base()


def get_db():
    """获取数据库会话"""
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()


def init_db():
    """初始化数据库，创建所有表"""
    # 导入所有模型，确保它们被注册
    import app.models.user
    import app.models.workflow
    import app.models.agent
    import app.models.execution
    import app.models.model_config
    import app.models.workflow_template
    import app.models.permission
    import app.models.alert_rule
    Base.metadata.create_all(bind=engine)