// 主题布置 — 老师发布日记主题，学生提交对应日记

use sea_orm::entity::prelude::*;
use serde::{Deserialize, Serialize};

#[derive(Clone, Debug, PartialEq, DeriveEntityModel, Serialize, Deserialize)]
#[sea_orm(table_name = "topic_assignments")]
pub struct Model {
    #[sea_orm(primary_key, auto_increment = false)]
    pub id: Uuid,
    pub tenant_id: Uuid,
    /// 所属班级
    pub class_id: Uuid,
    /// 布置主题的老师
    pub teacher_id: Uuid,
    /// 主题标题
    pub title: String,
    /// 主题描述/要求
    #[serde(skip_serializing_if = "Option::is_none")]
    pub description: Option<String>,
    /// 截止日期
    #[serde(skip_serializing_if = "Option::is_none")]
    pub due_date: Option<chrono::NaiveDate>,
    /// 是否激活
    pub is_active: bool,
    pub created_at: DateTimeUtc,
    pub updated_at: DateTimeUtc,
    pub created_by: Uuid,
    pub updated_by: Uuid,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub deleted_at: Option<DateTimeUtc>,
    pub version: i32,
}

#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
pub enum Relation {
    #[sea_orm(
        belongs_to = "super::school_class::Entity",
        from = "Column::ClassId",
        to = "super::school_class::Column::Id",
        on_delete = "Cascade"
    )]
    SchoolClass,
}

impl Related<super::school_class::Entity> for Entity {
    fn to() -> RelationDef {
        Relation::SchoolClass.def()
    }
}

impl ActiveModelBehavior for ActiveModel {}