package system

import (
	"time"
)

type InviteCodeStatus string

const (
	InviteCodeStatusUnused  InviteCodeStatus = "unused"
	InviteCodeStatusUsed    InviteCodeStatus = "used"
	InviteCodeStatusRevoked InviteCodeStatus = "revoked"
	InviteCodeStatusExpired InviteCodeStatus = "expired"
)

// InviteCode 邀请码（明文不落库，仅保存 hash）
type InviteCode struct {
	ID              uint             `json:"id" gorm:"primaryKey"`
	CreatedByUserID uint             `json:"createdByUserId" gorm:"index;not null;comment:邀请码生成者用户ID"`
	CodeHash        string           `json:"-" gorm:"uniqueIndex;size:64;not null;comment:邀请码hash(sha256 hex)"`
	CodeLast4       string           `json:"codeLast4" gorm:"size:8;comment:邀请码末尾4位(展示)"`
	Status          InviteCodeStatus `json:"status" gorm:"type:varchar(16);index;not null;comment:状态"`
	ExpiresAt       *time.Time       `json:"expiresAt" gorm:"index;comment:过期时间"`
	UsedByUserID    *uint            `json:"usedByUserId" gorm:"index;comment:使用者用户ID"`
	UsedAt          *time.Time       `json:"usedAt" gorm:"comment:使用时间"`
	CreatedAt       time.Time        `json:"createdAt"`
	UpdatedAt       time.Time        `json:"updatedAt"`
}

func (InviteCode) TableName() string {
	return "invite_codes"
}