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

# ---------- 请求模型 ----------
class TeacherCreate(BaseModel):
    t_no: Optional[str] = Field(None, max_length=20, description="老师编号，不传则自动生成")
    t_name: str = Field(..., max_length=50, description="老师姓名")
    t_phone: Optional[str] = Field(None, max_length=20, description="电话")
    t_email: Optional[str] = Field(None, max_length=20, description="邮箱")
    class_id: int = Field(..., description="班级ID")
    role: str = Field(..., max_length=50, description="角色")

class TeacherUpdate(BaseModel):
    t_no: Optional[str] = Field(None, max_length=20)
    t_name: Optional[str] = Field(None, max_length=50)
    t_phone: Optional[str] = Field(None, max_length=20)
    t_email: Optional[str] = Field(None, max_length=20)
    class_id: Optional[int] = None
    role: Optional[str] = Field(None, max_length=50)

# ---------- 响应模型 ----------
class TeacherResponse(BaseModel):
    t_id: int
    t_no: str
    t_name: str
    class_id: int
    role: str
    t_phone: Optional[str]
    t_email: Optional[str]

    model_config = ConfigDict(from_attributes=True)