"""
用户数据传输对象定义

定义用户相关API请求和响应的数据结构
需求: 3.4, 9.2, 9.3
"""
from datetime import datetime, date
from typing import Optional
from pydantic import BaseModel, ConfigDict, EmailStr, Field, field_validator


class UserCreate(BaseModel):
    """用户注册请求"""
    username: str = Field(..., min_length=3, max_length=50, description="用户名", examples=["testuser"])
    password: str = Field(..., min_length=6, max_length=100, description="密码（默认为加密密码，Swagger测试时传明文并设置encrypted=false）", examples=["password123"])
    nickname: str = Field(..., min_length=1, max_length=100, description="昵称", examples=["测试用户"])
    email: Optional[EmailStr] = Field(None, description="邮箱", examples=["test@example.com"])
    phone: Optional[str] = Field(None, max_length=20, description="手机号")
    sms_code: Optional[str] = Field(None, description="手机验证码（普通注册时必填）")
    email_code: Optional[str] = Field(None, description="邮箱验证码（填写邮箱时必填）")
    encrypted: Optional[bool] = Field(True, description="密码是否已加密（默认true，Swagger测试时设为false使用明文）")

    @field_validator("email", mode="before")
    @classmethod
    def normalize_email(cls, value):
        # Treat blank strings from external SSO providers as missing email.
        if value is None:
            return None
        if isinstance(value, str):
            normalized = value.strip()
            return normalized or None
        return value


class UserLogin(BaseModel):
    """用户登录请求"""
    username: str = Field(..., description="用户名或手机号", examples=["testuser"])
    password: str = Field(..., description="密码（默认为加密密码，Swagger测试时传明文并设置encrypted=false）", examples=["password123"])
    encrypted: Optional[bool] = Field(True, description="密码是否已加密（默认true，Swagger测试时设为false使用明文）")


class UserUpdate(BaseModel):
    """用户信息更新请求"""
    nickname: Optional[str] = Field(None, min_length=1, max_length=100, description="昵称")
    phone: Optional[str] = Field(None, max_length=20, description="手机号")
    email: Optional[EmailStr] = Field(None, description="邮箱")
    avatar: Optional[str] = Field(None, description="头像URL")
    apikey: Optional[str] = Field(None, max_length=255, description="API密钥")

    @field_validator("email", mode="before")
    @classmethod
    def normalize_email(cls, value):
        if value is None:
            return None
        if isinstance(value, str):
            normalized = value.strip()
            return normalized or None
        return value


class UserVerifyRequest(BaseModel):
    """用户实名认证请求"""
    real_name: str = Field(..., min_length=2, max_length=100, description="真实姓名")
    id_card: str = Field(..., min_length=15, max_length=18, description="身份证号")


class UserResponse(BaseModel):
    """用户信息响应（不包含密码）"""
    id: str
    username: Optional[str] = None
    nickname: str
    phone: Optional[str] = None
    email: Optional[str] = None
    avatar: Optional[str] = None
    real_name: Optional[str] = None
    is_verified: str = "unverified"
    verified_at: Optional[datetime] = None
    registration_date: Optional[date] = None
    created_at: datetime
    updated_at: datetime

    model_config = ConfigDict(from_attributes=True)


class TokenResponse(BaseModel):
    """登录令牌响应"""
    access_token: str
    token_type: str = "bearer"
    user: UserResponse


class TokenVerifyResponse(BaseModel):
    """Token验证响应"""
    valid: bool
    user: UserResponse