import { api } from './request';

export interface Article {
  id: string;
  title: string;
  summary?: string;
  content?: string;
  cover_image?: string;
  category?: string;
  category_id?: string;
  category_name?: string;
  tags?: { id: string; name: string }[];
  published_at?: string;
  author?: string;
  view_count?: number;
  status?: string;
}

export interface ArticleCategory {
  id: string;
  name: string;
  parent_id?: string | null;
  children?: ArticleCategory[];
}

/** 将后台返回的扁平分类数组构建为树形结构 */
export function buildCategoryTree(flat: ArticleCategory[]): ArticleCategory[] {
  const map = new Map<string, ArticleCategory>();
  const roots: ArticleCategory[] = [];
  for (const c of flat) {
    c.children = [];
    map.set(c.id, c);
  }
  for (const c of flat) {
    if (c.parent_id && map.has(c.parent_id)) {
      map.get(c.parent_id)!.children!.push(c);
    } else {
      roots.push(c);
    }
  }
  return roots;
}

export async function listArticles(params?: {
  page?: number;
  page_size?: number;
  category_id?: string;
  tag_id?: string;
  keyword?: string;
}) {
  return api.get<{ data: Article[]; total: number }>('/health/articles', {
    page: params?.page ?? 1,
    page_size: params?.page_size ?? 20,
    status: 'published',
    ...params,
  });
}

export async function getArticleDetail(id: string) {
  return api.get<Article>(`/health/articles/${id}`);
}

/** 公开文章详情（无需认证） */
export async function getPublicArticleDetail(id: string) {
  return api.get<Article>(`/public/articles/${id}`);
}

export async function listCategories() {
  return api.get<ArticleCategory[]>('/health/article-categories');
}