from pydantic import BaseModel, Field
from typing import Optional, List

# ===================================================================
#                       基础模型 (Base Models)
# ===================================================================

class UserInfo(BaseModel):
    """用户的基本信息"""
    id: int = Field(..., description="用户的唯一ID", example=1001)
    name: str = Field(..., description="用户的姓名", example="张三")
    registered_faces_count: int = Field(..., description="该用户已注册的人脸数量", example=2)

class FaceLocation(BaseModel):
    """人脸在图片中的位置和尺寸"""
    x: int = Field(..., description="人脸框左上角的X坐标")
    y: int = Field(..., description="人脸框左上角的Y坐标")
    width: int = Field(..., description="人脸框的宽度")
    height: int = Field(..., description="人脸框的高度")

# ===================================================================
#                       API 请求模型 (Request Models)
# ===================================================================

class ImageSource(BaseModel):
    """图片来源，可以是URL或Base64编码的数据"""
    url: Optional[str] = Field(None, description="图片的URL地址", example="http://example.com/image.jpg")
    face_data: Optional[str] = Field(None, description="图片的Base64编码字符串")

class RegisterRequest(ImageSource):
    """注册新用户的请求体"""
    id: int = Field(..., description="要注册用户的唯一ID", example=1001)
    name: str = Field(..., description="要注册用户的姓名", example="张三")

class VerifyRequest(ImageSource):
    """1:1人脸认证的请求体"""
    id: int = Field(..., description="要验证的用户ID", example=1001)

# ===================================================================
#                       API 响应模型 (Response Models)
# ===================================================================

class StandardResponse(BaseModel):
    """标准API响应模型"""
    code: int = Field(0, description="响应码，0为成功，非0为失败", example=0)
    message: str = Field("success", description="响应消息", example="操作成功")
    data: Optional[dict] = None

class UserListResponse(StandardResponse):
    """获取用户列表的响应"""
    data: List[UserInfo]

class RegisterResponse(StandardResponse):
    """注册成功后的响应"""
    data: UserInfo

class VerificationResult(BaseModel):
    """1:1认证结果"""
    match: bool = Field(..., description="是否匹配")
    confidence: float = Field(..., description="置信度 (0.0 to 1.0)")

class VerifyResponse(StandardResponse):
    """1:1人脸认证的响应"""
    data: VerificationResult

class DetectedFace(UserInfo):
    """1:N识别结果中的单个人脸信息"""
    location: FaceLocation
    confidence: float = Field(..., description="识别的置信度")

class DetectResponse(StandardResponse):
    """1:N人脸识别的响应"""
    data: List[DetectedFace]