package entities

import (
	"time"

	"github.com/google/uuid"
	"gorm.io/gorm"
)

// ProductParameter 产品参数配置实体
type ProductParameter struct {
	ID          string         `gorm:"primaryKey;type:varchar(36)" comment:"参数配置ID"`
	ProductID   string         `gorm:"type:varchar(36);not null;index" comment:"产品ID"`
	Name        string         `gorm:"type:varchar(100);not null" comment:"参数名称"`
	Field       string         `gorm:"type:varchar(50);not null" comment:"参数字段名"`
	Type        string         `gorm:"type:varchar(20);not null;default:'string'" comment:"参数类型"`
	Required    bool           `gorm:"default:true" comment:"是否必填"`
	Description string         `gorm:"type:text" comment:"参数描述"`
	Example     string         `gorm:"type:varchar(200)" comment:"参数示例"`
	Validation  string         `gorm:"type:text" comment:"验证规则"`
	SortOrder   int            `gorm:"default:0" comment:"排序"`
	
	// 关联关系
	Product *Product `gorm:"foreignKey:ProductID" comment:"产品"`
	
	CreatedAt time.Time      `gorm:"autoCreateTime" comment:"创建时间"`
	UpdatedAt time.Time      `gorm:"autoUpdateTime" comment:"更新时间"`
	DeletedAt gorm.DeletedAt `gorm:"index" comment:"软删除时间"`
}

// BeforeCreate GORM钩子：创建前自动生成UUID
func (pp *ProductParameter) BeforeCreate(tx *gorm.DB) error {
	if pp.ID == "" {
		pp.ID = uuid.New().String()
	}
	return nil
}

// IsValid 检查参数配置是否有效
func (pp *ProductParameter) IsValid() bool {
	return pp.DeletedAt.Time.IsZero()
}

// GetValidationRules 获取验证规则
func (pp *ProductParameter) GetValidationRules() map[string]interface{} {
	if pp.Validation == "" {
		return nil
	}
	
	// 这里可以解析JSON格式的验证规则
	// 暂时返回空map，后续可以扩展
	return make(map[string]interface{})
}