from pydantic import BaseModel, Field
from datetime import date, datetime
from decimal import Decimal


class EmploymentCreate(BaseModel):
    """新增就业信息 请求体 Schema"""
    student_id: int = Field(..., description="关联学生ID，必填")# description：在Swagger页面展示字段说明文字
    employment_status: str | None = Field(None, description="就业状态,选填")
    employment_open_date: date | None = Field(None, description="就业开放时间，选填")
    offer_date: date | None = Field(None, description="offer下发时间，选填")
    company_name: str | None = Field(None, max_length=100, description="就业公司名称，选填")
    salary: Decimal | None = Field(None, ge=0, description="就业薪资，不能负数，选填")
    remark: str | None = Field(None, max_length=255, description="备注，选填")


class EmploymentUpdate(BaseModel):
    """修改就业信息 请求体 Schema：全部字段可选，只传要修改的字段"""
    employment_status: str | None = Field(None, description="就业状态")
    employment_open_date: date | None = Field(None, description="就业开放时间")
    offer_date: date | None = Field(None, description="offer下发时间")
    company_name: str | None = Field(None, max_length=100, description="就业公司名称")
    salary: Decimal | None = Field(None, ge=0, description="就业薪资")
    remark: str | None = Field(None, max_length=255, description="备注")


class EmploymentResponse(BaseModel):
    """就业信息返回响应体Schema，接口返回给前端的数据结构"""
    id: int
    student_id: int
    employment_status: str
    employment_open_date: date | None
    offer_date: date | None
    company_name: str | None
    salary: Decimal | None
    remark: str | None
    created_at: datetime | None
    updated_at: datetime | None