# schemas/teacher_schema.py
# 教师信息模块的 Pydantic 模式

from typing import Optional

from pydantic import BaseModel, ConfigDict, Field


class TeacherBase(BaseModel):
    """教师公共字段"""
    name: str = Field(..., max_length=20, description="姓名")
    phone: str = Field(..., max_length=20, description="电话(唯一)")
    type: str = Field(..., max_length=20, description="教师职位")


class TeacherCreate(TeacherBase):
    """新增教师时，id 必填"""
    id: str = Field(..., max_length=15, description="教师编号(主键)")


class TeacherUpdate(BaseModel):
    """更新教师信息：仅更新传入的字段"""
    name: Optional[str] = Field(default=None, max_length=20, description="姓名")
    phone: Optional[str] = Field(default=None, max_length=20, description="电话(唯一)")
    type: Optional[str] = Field(default=None, max_length=20, description="教师职位")


class TeacherOut(TeacherBase):
    """教师响应模型（含 id 与软删除标记）"""
    id: str
    is_deleted: int

    model_config = ConfigDict(from_attributes=True)