// ===========================================
// 多班级版班级管理系统 - Go 后端
//
// 开发者: Canglan
// 联系方式: admin@sea-studio.top
// 版权归属: Sea Network Technology Studio
// 许可证: Apache License 2.0
//
// 版权所有 © Sea Network Technology Studio
// ===========================================

package model

import "time"

// Assignment 作业模型，对应 assignments 表
type Assignment struct {
	AssignmentID int        `gorm:"column:assignment_id;primaryKey;autoIncrement" json:"assignment_id"`
	ClassID      int        `gorm:"column:class_id;not null;index:idx_assignment_class" json:"class_id"`
	SubjectID    int        `gorm:"column:subject_id;not null;index:idx_assignment_subject" json:"subject_id"`
	Title        string     `gorm:"column:title;type:varchar(100);not null" json:"title"`
	Description  *string    `gorm:"column:description;type:text" json:"description"`
	Deadline     time.Time  `gorm:"column:deadline;type:date;not null" json:"deadline"`
	CreatedBy    int        `gorm:"column:created_by;not null" json:"created_by"`
	CreatedAt    time.Time  `gorm:"column:created_at;autoCreateTime" json:"created_at"`

	// 虚拟字段
	SubjectName *string `gorm:"-" json:"subject_name,omitempty"`
}

// TableName 指定表名
func (Assignment) TableName() string {
	return "assignments"
}

// AssignmentSubmission 作业提交记录模型，对应 homework_submissions 表
type AssignmentSubmission struct {
	SubmissionID     int        `gorm:"column:submission_id;primaryKey;autoIncrement" json:"submission_id"`
	AssignmentID     int        `gorm:"column:assignment_id;not null;uniqueIndex:uk_assignment_student" json:"assignment_id"`
	StudentID        int        `gorm:"column:student_id;not null;uniqueIndex:uk_assignment_student" json:"student_id"`
	Status           string     `gorm:"column:status;type:enum('submitted','not_submitted','late');default:'not_submitted'" json:"status"`
	SubmitTime       *time.Time `gorm:"column:submit_time" json:"submit_time"`
	Comments         *string    `gorm:"column:comments;type:text" json:"comments"`
	DeductionApplied int8       `gorm:"column:deduction_applied;default:0" json:"deduction_applied"`
	DeductionRecordID *int64    `gorm:"column:deduction_record_id" json:"deduction_record_id"`
	UpdatedBy        *int       `gorm:"column:updated_by" json:"updated_by"`
	UpdatedAt        time.Time  `gorm:"column:updated_at;autoUpdateTime" json:"updated_at"`
}

// TableName 指定表名
func (AssignmentSubmission) TableName() string {
	return "homework_submissions"
}