"""
工具定义模型
"""
from sqlalchemy import Column, String, Text, JSON, DateTime, Boolean, ForeignKey, Integer, func
from sqlalchemy.dialects.mysql import CHAR
from sqlalchemy.orm import relationship
from app.core.database import Base
import uuid


class Tool(Base):
    """工具定义表"""
    __tablename__ = "tools"
    
    id = Column(CHAR(36), primary_key=True, default=lambda: str(uuid.uuid4()), comment="工具ID")
    name = Column(String(100), nullable=False, unique=True, comment="工具名称")
    description = Column(Text, nullable=False, comment="工具描述")
    category = Column(String(50), comment="工具分类")
    
    # 工具定义（OpenAI Function格式）
    function_schema = Column(JSON, nullable=False, comment="函数定义（JSON Schema）")
    
    # 工具实现类型
    implementation_type = Column(String(50), nullable=False, comment="实现类型: builtin/http/workflow/code")
    implementation_config = Column(JSON, comment="实现配置")
    
    # 元数据
    is_public = Column(Boolean, default=False, comment="是否公开")
    user_id = Column(CHAR(36), ForeignKey("users.id"), nullable=True, comment="创建者ID")
    use_count = Column(Integer, default=0, comment="使用次数")
    created_at = Column(DateTime, default=func.now(), comment="创建时间")
    updated_at = Column(DateTime, default=func.now(), onupdate=func.now(), comment="更新时间")
    
    # 关系
    user = relationship("User", backref="tools")
    
    def __repr__(self):
        return f"<Tool(id={self.id}, name={self.name})>"