ai_dianshang/server/internal/model/refund.go

package model

import (
	"time"
)

// 退款状态常量
const (
	RefundStatusPending    = 1 // 待审核
	RefundStatusApproved   = 2 // 审核通过
	RefundStatusRejected   = 3 // 审核拒绝
	RefundStatusProcessing = 4 // 退款中
	RefundStatusSuccess    = 5 // 退款成功
	RefundStatusFailed     = 6 // 退款失败
)

// 退款类型常量
const (
	RefundTypeRefundOnly = 1 // 仅退款
	RefundTypeReturn     = 2 // 退货退款
)

// 微信退款状态常量
const (
	WechatRefundStatusSuccess    = "SUCCESS"    // 退款成功
	WechatRefundStatusClosed     = "CLOSED"     // 退款关闭
	WechatRefundStatusProcessing = "PROCESSING" // 退款处理中
)

// Refund 退款记录
type Refund struct {
	ID                    uint       `json:"id" gorm:"primaryKey;autoIncrement"`
	RefundNo              string     `json:"refund_no" gorm:"size:64;not null;uniqueIndex"`
	OrderID               uint       `json:"order_id" gorm:"not null;index"`
	OrderNo               string     `json:"order_no" gorm:"size:32;not null;index"`
	UserID                uint       `json:"user_id" gorm:"not null;index"`
	RefundType            int        `json:"refund_type" gorm:"not null;default:1"`
	RefundReason          string     `json:"refund_reason" gorm:"size:255;not null"`
	RefundDescription     string     `json:"refund_description" gorm:"type:text"`
	RefundAmount          float64    `json:"refund_amount" gorm:"type:decimal(10,2);not null"`
	RefundFee             float64    `json:"refund_fee" gorm:"type:decimal(10,2);default:0.00"`
	ActualRefundAmount    float64    `json:"actual_refund_amount" gorm:"type:decimal(10,2);not null"`
	Status                int        `json:"status" gorm:"not null;default:1;index"`
	ApplyTime             time.Time  `json:"apply_time" gorm:"not null;default:CURRENT_TIMESTAMP;index"`
	AuditTime             *time.Time `json:"audit_time"`
	RefundTime            *time.Time `json:"refund_time"`
	AdminID               *uint      `json:"admin_id"`
	AdminRemark           string     `json:"admin_remark" gorm:"type:text"`
	RejectReason          string     `json:"reject_reason" gorm:"size:255"`
	
	// 微信退款相关字段
	WechatRefundID           string     `json:"wechat_refund_id" gorm:"size:64;index"`
	WechatOutRefundNo        string     `json:"wechat_out_refund_no" gorm:"size:64;uniqueIndex"`
	WechatTransactionID      string     `json:"wechat_transaction_id" gorm:"size:64;index"`
	WechatRefundStatus       string     `json:"wechat_refund_status" gorm:"size:32"`
	WechatRefundRecvAccount  string     `json:"wechat_refund_recv_account" gorm:"size:64"`
	WechatSuccessTime        *time.Time `json:"wechat_success_time"`
	WechatUserReceivedAccount string    `json:"wechat_user_received_account" gorm:"size:64"`
	WechatRefundAccount      string     `json:"wechat_refund_account" gorm:"size:32"`
	
	// 退货相关字段
	ReturnLogisticsCompany string     `json:"return_logistics_company" gorm:"size:50"`
	ReturnLogisticsNo      string     `json:"return_logistics_no" gorm:"size:100"`
	ReturnAddress          string     `json:"return_address" gorm:"size:255"`
	GoodsReceivedTime      *time.Time `json:"goods_received_time"`
	
	// 图片证据
	EvidenceImages JSONSlice `json:"evidence_images" gorm:"type:json"`
	
	CreatedAt time.Time `json:"created_at"`
	UpdatedAt time.Time `json:"updated_at"`
	
	// 关联数据
	Order       Order        `json:"order,omitempty" gorm:"foreignKey:OrderID"`
	User        User         `json:"user,omitempty" gorm:"foreignKey:UserID"`
	Admin       User         `json:"admin,omitempty" gorm:"foreignKey:AdminID"`
	RefundItems []RefundItem `json:"refund_items,omitempty" gorm:"foreignKey:RefundID"`
	RefundLogs  []RefundLog  `json:"refund_logs,omitempty" gorm:"foreignKey:RefundID"`
}

// RefundItem 退款项目
type RefundItem struct {
	ID           uint      `json:"id" gorm:"primaryKey;autoIncrement"`
	RefundID     uint      `json:"refund_id" gorm:"not null;index"`
	OrderItemID  uint      `json:"order_item_id" gorm:"not null;index"`
	ProductID    uint      `json:"product_id" gorm:"not null;index"`
	SKUID        *uint     `json:"sku_id" gorm:"column:sku_id"`
	ProductName  string    `json:"product_name" gorm:"size:100;not null"`
	ProductImage string    `json:"product_image" gorm:"size:255"`
	SpecInfo     JSONMap   `json:"spec_info" gorm:"type:json"`
	Quantity     int       `json:"quantity" gorm:"not null"`
	UnitPrice    float64   `json:"unit_price" gorm:"type:decimal(10,2);not null"`
	TotalPrice   float64   `json:"total_price" gorm:"type:decimal(10,2);not null"`
	CreatedAt    time.Time `json:"created_at"`
	UpdatedAt    time.Time `json:"updated_at"`
	
	// 关联数据
	Refund    Refund    `json:"refund,omitempty" gorm:"foreignKey:RefundID"`
	OrderItem OrderItem `json:"order_item,omitempty" gorm:"foreignKey:OrderItemID"`
	Product   Product   `json:"product,omitempty" gorm:"foreignKey:ProductID"`
	SKU       ProductSKU `json:"sku,omitempty" gorm:"foreignKey:SKUID"`
}

// RefundLog 退款操作日志
type RefundLog struct {
	ID           uint      `json:"id" gorm:"primaryKey;autoIncrement"`
	RefundID     uint      `json:"refund_id" gorm:"not null;index"`
	Action       string    `json:"action" gorm:"size:50;not null;index"`
	StatusFrom   *int      `json:"status_from"`
	StatusTo     *int      `json:"status_to"`
	OperatorType string    `json:"operator_type" gorm:"size:20;not null"`
	OperatorID   *uint     `json:"operator_id"`
	Remark       string    `json:"remark" gorm:"type:text"`
	ExtraData    JSONMap   `json:"extra_data" gorm:"type:json"`
	CreatedAt    time.Time `json:"created_at" gorm:"index"`
	
	// 关联数据
	Refund   Refund `json:"refund,omitempty" gorm:"foreignKey:RefundID"`
	Operator User   `json:"operator,omitempty" gorm:"foreignKey:OperatorID"`
}

// TableName 设置表名
func (Refund) TableName() string {
	return "ai_refunds"
}

// TableName 设置表名
func (RefundItem) TableName() string {
	return "ai_refund_items"
}

// TableName 设置表名
func (RefundLog) TableName() string {
	return "ai_refund_logs"
}

// GetStatusText 获取退款状态文本
func (r *Refund) GetStatusText() string {
	switch r.Status {
	case RefundStatusPending:
		return "待审核"
	case RefundStatusApproved:
		return "审核通过"
	case RefundStatusRejected:
		return "审核拒绝"
	case RefundStatusProcessing:
		return "退款中"
	case RefundStatusSuccess:
		return "退款成功"
	case RefundStatusFailed:
		return "退款失败"
	default:
		return "未知状态"
	}
}

// GetRefundTypeText 获取退款类型文本
func (r *Refund) GetRefundTypeText() string {
	switch r.RefundType {
	case RefundTypeRefundOnly:
		return "仅退款"
	case RefundTypeReturn:
		return "退货退款"
	default:
		return "未知类型"
	}
}

// IsWechatRefundSuccess 判断微信退款是否成功
func (r *Refund) IsWechatRefundSuccess() bool {
	return r.WechatRefundStatus == WechatRefundStatusSuccess
}

// CanCancel 判断是否可以取消退款申请
func (r *Refund) CanCancel() bool {
	return r.Status == RefundStatusPending
}

// CanAudit 判断是否可以审核
func (r *Refund) CanAudit() bool {
	return r.Status == RefundStatusPending
}

// CanRefund 判断是否可以执行退款
func (r *Refund) CanRefund() bool {
	return r.Status == RefundStatusApproved
}