"""就业模块出入参（需求 2.3）。"""

from __future__ import annotations

from datetime import date

from pydantic import BaseModel, Field, model_validator

from app.schema.common import ORMBase, STRIP_VALIDATOR


class _EmploymentBase(BaseModel):
    open_date: str | None = Field(None, description="就业开放时间 YYYY-MM-DD")
    offer_date: str | None = Field(None, description="offer 下发时间 YYYY-MM-DD")
    company: str | None = Field(None, max_length=80, description="就业公司名称")
    salary: float | None = Field(None, ge=0, description="就业薪资（元/月）")
    position: str | None = Field(None, max_length=50, description="岗位")
    city: str | None = Field(None, max_length=30, description="就业城市")
    remark: str | None = Field(None, description="备注")

    _v_strip = STRIP_VALIDATOR


class EmploymentCreate(_EmploymentBase):
    stu_id: int = Field(..., description="学生ID（一个学生只能有一条就业记录，重复登记=更新）")

    @model_validator(mode="after")
    def _at_least_one(self):
        if not any([self.open_date, self.offer_date, self.company, self.salary]):
            raise ValueError("就业开放时间 / offer 时间 / 公司 / 薪资 至少要填一项")
        return self


class EmploymentUpdate(BaseModel):
    open_date: str | None = None
    offer_date: str | None = None
    company: str | None = Field(None, max_length=80)
    salary: float | None = Field(None, ge=0)
    position: str | None = None
    city: str | None = None
    remark: str | None = None

    _v_strip = STRIP_VALIDATOR


class EmploymentOut(ORMBase):
    id: int
    stu_id: int
    stu_no: str | None = Field(None, description="学号（JOIN 学生表，不落库）")
    student_name: str | None = Field(None, description="学生姓名（JOIN 学生表，不落库）")
    class_id: int | None = Field(None, description="班级ID（冗余字段）")
    class_name: str | None = Field(None, description="班级名称（冗余ID实时取名）")

    open_date: date | None = None
    offer_date: date | None = None
    company: str | None = None
    salary: float | None = None
    salary_wan: float | None = Field(None, description="薪资（万元/月）")
    position: str | None = None
    city: str | None = None
    duration_days: int | None = Field(None, description="就业时长（天）= offer 时间 - 开放时间")
    remark: str | None = None

    student_status: int | None = Field(None, description="学生当前状态（联动后的结果）")
    student_status_text: str | None = None


class EmploymentRegisterResult(BaseModel):
    employment: EmploymentOut
    created: bool = Field(True, description="是新增还是更新已有记录")
    status_changed: bool = Field(False, description="学生状态是否发生变化")
    from_status_text: str | None = None
    to_status_text: str | None = None
    msg: str = Field("", description="给前端直接展示的一句话")