"""
用户相关 Pydantic Schemas
"""
from pydantic import BaseModel, Field
from datetime import datetime
from typing import Optional


class UserCreate(BaseModel):
    """用户注册请求"""
    username: str = Field(..., min_length=2, max_length=50, description="用户名")
    password: str = Field(..., min_length=6, max_length=100, description="密码")
    nickname: Optional[str] = Field(None, max_length=50, description="昵称")


class UserLogin(BaseModel):
    """用户登录请求"""
    username: str = Field(..., description="用户名")
    password: str = Field(..., description="密码")


class UserResponse(BaseModel):
    """用户响应"""
    id: int
    username: str
    nickname: Optional[str] = None
    phone: Optional[str] = None
    avatar: Optional[str] = None
    created_at: datetime

    class Config:
        from_attributes = True


class Token(BaseModel):
    """认证令牌响应"""
    access_token: str
    token_type: str = "bearer"


class UserUpdate(BaseModel):
    """用户信息更新请求"""
    nickname: Optional[str] = Field(None, max_length=50, description="昵称")
    phone: Optional[str] = Field(None, max_length=20, description="手机号")
    avatar: Optional[str] = Field(None, max_length=255, description="头像URL")


class PasswordChange(BaseModel):
    """修改密码请求"""
    old_password: str = Field(..., description="旧密码")
    new_password: str = Field(..., min_length=6, max_length=100, description="新密码")