package entities

import (
	"time"

	"gorm.io/gorm"
)

// ProductDocumentation 产品文档实体
type ProductDocumentation struct {
	ID          string         `gorm:"primaryKey;type:varchar(36)" comment:"文档ID"`
	ProductID   string         `gorm:"type:varchar(36);not null;uniqueIndex" comment:"产品ID"`
	Title       string         `gorm:"type:varchar(200);not null" comment:"文档标题"`
	Content     string         `gorm:"type:longtext;not null" comment:"文档内容"`
	UsageGuide  string         `gorm:"type:longtext" comment:"使用指南"`
	APIDocs     string         `gorm:"type:longtext" comment:"API文档"`
	Examples    string         `gorm:"type:longtext" comment:"使用示例"`
	FAQ         string         `gorm:"type:longtext" comment:"常见问题"`
	Version     string         `gorm:"type:varchar(20);default:'1.0'" comment:"文档版本"`
	Published bool           `gorm:"default:false" comment:"是否已发布"`
	
	// 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"`
}

// IsValid 检查文档是否有效
func (pd *ProductDocumentation) IsValid() bool {
	return pd.DeletedAt.Time.IsZero()
}

// IsPublished 检查文档是否已发布
func (pd *ProductDocumentation) IsPublished() bool {
	return pd.Published
}

// Publish 发布文档
func (pd *ProductDocumentation) Publish() {
	pd.Published = true
}

// Unpublish 取消发布文档
func (pd *ProductDocumentation) Unpublish() {
	pd.Published = false
}

// UpdateContent 更新文档内容
func (pd *ProductDocumentation) UpdateContent(title, content, usageGuide, apiDocs, examples, faq string) {
	pd.Title = title
	pd.Content = content
	pd.UsageGuide = usageGuide
	pd.APIDocs = apiDocs
	pd.Examples = examples
	pd.FAQ = faq
}

// IncrementVersion 增加版本号
func (pd *ProductDocumentation) IncrementVersion() {
	// 简单的版本号递增逻辑，实际项目中可能需要更复杂的版本管理
	if pd.Version == "" {
		pd.Version = "1.0"
	} else {
		// 这里可以实现更复杂的版本号递增逻辑
		pd.Version = pd.Version + ".1"
	}
}