from pydantic import BaseModel, EmailStr
from typing import Optional
from datetime import datetime

class AccountCreate(BaseModel):
    """创建账户请求模型"""
    username: str
    email: EmailStr
    password: str

class AccountResponse(BaseModel):
    """账户响应模型"""
    id: str
    username: str
    email: EmailStr
    created_at: datetime

class PasswordChange(BaseModel):
    """修改密码请求模型"""
    current_password: str
    new_password: str

class TenantCreate(BaseModel):
    """创建租户请求模型"""
    name: str
    description: str

class TenantResponse(BaseModel):
    """租户响应模型"""
    id: str
    name: str
    description: str
    created_at: datetime