package responses

import (
	"time"
	"tyapi-server/internal/domains/article/entities"
)

// ArticleInfoResponse 文章详情响应
type ArticleInfoResponse struct {
	ID          string    `json:"id" comment:"文章ID"`
	Title       string    `json:"title" comment:"文章标题"`
	Content     string    `json:"content" comment:"文章内容"`
	Summary     string    `json:"summary" comment:"文章摘要"`
	CoverImage  string    `json:"cover_image" comment:"封面图片"`
	CategoryID  string    `json:"category_id" comment:"分类ID"`
	Category    *CategoryInfoResponse `json:"category,omitempty" comment:"分类信息"`
	Status      string    `json:"status" comment:"文章状态"`
	IsFeatured  bool      `json:"is_featured" comment:"是否推荐"`
	PublishedAt *time.Time `json:"published_at" comment:"发布时间"`
	ViewCount   int       `json:"view_count" comment:"阅读量"`
	Tags        []TagInfoResponse `json:"tags" comment:"标签列表"`
	CreatedAt   time.Time `json:"created_at" comment:"创建时间"`
	UpdatedAt   time.Time `json:"updated_at" comment:"更新时间"`
}

// ArticleListResponse 文章列表响应
type ArticleListResponse struct {
	Total int64                `json:"total" comment:"总数"`
	Page  int                  `json:"page" comment:"页码"`
	Size  int                  `json:"size" comment:"每页数量"`
	Items []ArticleInfoResponse `json:"items" comment:"文章列表"`
}

// CategoryInfoResponse 分类信息响应
type CategoryInfoResponse struct {
	ID          string    `json:"id" comment:"分类ID"`
	Name        string    `json:"name" comment:"分类名称"`
	Description string    `json:"description" comment:"分类描述"`
	SortOrder   int       `json:"sort_order" comment:"排序"`
	CreatedAt   time.Time `json:"created_at" comment:"创建时间"`
}

// TagInfoResponse 标签信息响应
type TagInfoResponse struct {
	ID        string    `json:"id" comment:"标签ID"`
	Name      string    `json:"name" comment:"标签名称"`
	Color     string    `json:"color" comment:"标签颜色"`
	CreatedAt time.Time `json:"created_at" comment:"创建时间"`
}

// CategoryListResponse 分类列表响应
type CategoryListResponse struct {
	Items []CategoryInfoResponse `json:"items" comment:"分类列表"`
	Total int                    `json:"total" comment:"总数"`
}

// TagListResponse 标签列表响应
type TagListResponse struct {
	Items []TagInfoResponse `json:"items" comment:"标签列表"`
	Total int               `json:"total" comment:"总数"`
}


// ArticleStatsResponse 文章统计响应
type ArticleStatsResponse struct {
	TotalArticles    int64 `json:"total_articles" comment:"文章总数"`
	PublishedArticles int64 `json:"published_articles" comment:"已发布文章数"`
	DraftArticles     int64 `json:"draft_articles" comment:"草稿文章数"`
	ArchivedArticles  int64 `json:"archived_articles" comment:"归档文章数"`
	TotalViews        int64 `json:"total_views" comment:"总阅读量"`
}

// FromArticleEntity 从文章实体转换为响应对象
func FromArticleEntity(article *entities.Article) *ArticleInfoResponse {
	if article == nil {
		return nil
	}
	
	response := &ArticleInfoResponse{
		ID:          article.ID,
		Title:       article.Title,
		Content:     article.Content,
		Summary:     article.Summary,
		CoverImage:  article.CoverImage,
		CategoryID:  article.CategoryID,
		Status:      string(article.Status),
		IsFeatured:  article.IsFeatured,
		PublishedAt: article.PublishedAt,
		ViewCount:   article.ViewCount,
		CreatedAt:   article.CreatedAt,
		UpdatedAt:   article.UpdatedAt,
	}
	
	// 转换分类信息
	if article.Category != nil {
		response.Category = &CategoryInfoResponse{
			ID:          article.Category.ID,
			Name:        article.Category.Name,
			Description: article.Category.Description,
			SortOrder:   article.Category.SortOrder,
			CreatedAt:   article.Category.CreatedAt,
		}
	}
	
	// 转换标签信息
	if len(article.Tags) > 0 {
		response.Tags = make([]TagInfoResponse, len(article.Tags))
		for i, tag := range article.Tags {
			response.Tags[i] = TagInfoResponse{
				ID:        tag.ID,
				Name:      tag.Name,
				Color:     tag.Color,
				CreatedAt: tag.CreatedAt,
			}
		}
	}
	
	return response
}

// FromArticleEntities 从文章实体列表转换为响应对象列表
func FromArticleEntities(articles []*entities.Article) []ArticleInfoResponse {
	if len(articles) == 0 {
		return []ArticleInfoResponse{}
	}
	
	responses := make([]ArticleInfoResponse, len(articles))
	for i, article := range articles {
		if response := FromArticleEntity(article); response != nil {
			responses[i] = *response
		}
	}
	
	return responses
}