// RootTale CMS 블로그 데이터 레이어 — 서버 전용.
// 사이트 UI에 맞는 메타 형태로 변환하는 wrapper. API 키는 env에서만 읽는다.
import {
  fetchPosts,
  fetchPost,
  type CmsPostContent,
} from "@roottale/cms-client/server";

function getApiKey(): string {
  const key = process.env.ROOTTALE_API_KEY;
  if (!key) throw new Error("ROOTTALE_API_KEY is not set");
  return key;
}

const baseUrl = process.env.ROOTTALE_API_BASE;

export interface BlogPostMeta {
  id: string;
  slug: string;
  title: string;
  description: string;
  date: string; // publishedAt ISO
  category: string;
  tags: { name: string; slug: string }[];
  image: string | null;
  authorName?: string;
  seo?: {
    title?: string;
    description?: string;
    canonical?: string;
    ogImage?: string;
    noindex?: boolean;
    nofollow?: boolean;
  };
}

function toMeta(post: CmsPostContent): BlogPostMeta {
  const category = post.terms?.find((t) => t.taxonomy === "category");
  const meta = (post.metaJson ?? {}) as Record<string, unknown>;
  return {
    id: post.id,
    slug: post.slug,
    title: post.title,
    description: post.excerpt ?? "",
    date: post.publishedAt ?? "",
    category: category?.name ?? "",
    tags:
      post.terms
        ?.filter((t) => t.taxonomy === "tag")
        .map((t) => ({ name: t.name, slug: t.slug })) ?? [],
    image: post.featuredImageUrl ?? null,
    authorName: post.authorName ?? undefined,
    seo: meta.seo as BlogPostMeta["seo"],
  };
}

export async function getAllPosts(): Promise<BlogPostMeta[]> {
  const page = await fetchPosts({
    apiKey: getApiKey(),
    baseUrl,
    type: "post",
    limit: 100,
  });
  return page.items.map(toMeta);
}

export async function getPost(
  slug: string,
): Promise<(BlogPostMeta & { bodyJson: unknown }) | null> {
  const post = await fetchPost({ apiKey: getApiKey(), baseUrl, slugOrId: slug });
  if (!post) return null;
  return { ...toMeta(post), bodyJson: post.bodyJson };
}