package models

import (
	"time"

	"gorm.io/gorm"
)

// ExamShare 试卷分享关联表
type ExamShare struct {
	ID        uint           `gorm:"primaryKey" json:"id"`
	CreatedAt time.Time      `json:"created_at"`
	UpdatedAt time.Time      `json:"updated_at"`
	DeletedAt gorm.DeletedAt `gorm:"index" json:"-"`

	ExamID     uint      `gorm:"not null;uniqueIndex:uk_exam_shared_to" json:"exam_id"`
	SharedByID int64     `gorm:"not null;index" json:"shared_by_id"`
	SharedToID int64     `gorm:"not null;uniqueIndex:uk_exam_shared_to" json:"shared_to_id"`
	SharedAt   time.Time `gorm:"not null;default:CURRENT_TIMESTAMP" json:"shared_at"`

	// 关联关系
	Exam     *Exam `gorm:"foreignKey:ExamID" json:"exam,omitempty"`
	SharedBy *User `gorm:"foreignKey:SharedByID;references:ID" json:"shared_by,omitempty"`
	SharedTo *User `gorm:"foreignKey:SharedToID;references:ID" json:"shared_to,omitempty"`
}

// TableName 指定表名
func (ExamShare) TableName() string {
	return "exam_shares"
}