// 项目墙数据（极客层 P0）：构建时双源拉取 + 仓内缓存兜底
// 双源 = 自家 gitea（数据自控叙事）+ GitHub（社区 star 真值）；置顶清单人工维护
export interface RepoCard {
  source: 'gitea' | 'github';
  name: string;
  description: string;
  language: string | null;
  stars: number;
  url: string;
  updatedAt: string;
}

interface RawRepo {
  full_name?: string;
  name?: string;
  description?: string | null;
  language?: string | null;
  stars_count?: number;
  stargazers_count?: number;
  html_url?: string;
  updated_at?: string;
}

export const GITEA_API = 'https://git.wait4x.online/api/v1/users/wait4x/repos?limit=50';
export const GITHUB_API = 'https://api.github.com/users/wait4xx/repos?per_page=100&sort=updated';

/** 默认置顶（仅在调用方未传 pinned 时生效）：现由 content/site/opensource.yaml 的 pinned 供数 */
export const PINNED_DEFAULT: string[] = ['blog'];

async function fetchJson(url: string): Promise<RawRepo[]> {
  const res = await fetch(url, {
    headers: { Accept: 'application/json', 'User-Agent': 'wait4x-blog-build' },
    signal: AbortSignal.timeout(10_000),
  });
  if (!res.ok) throw new Error(`${url} -> ${res.status}`);
  return (await res.json()) as RawRepo[];
}

function toCard(r: RawRepo, source: RepoCard['source']): RepoCard | null {
  const name = r.name ?? r.full_name?.split('/')[1];
  if (!name || !r.html_url) return null;
  return {
    source,
    name,
    description: r.description ?? '',
    language: r.language ?? null,
    stars: r.stars_count ?? r.stargazers_count ?? 0,
    url: r.html_url,
    updatedAt: r.updated_at ?? '',
  };
}

/**
 * 拉双源合并去重（同名优先 gitea 自托管叙事，star 取 GitHub 真值）。
 * 任一源失败不抛：置顶项回落仓内缓存 JSON（构建产物绝不被网络单点卡死）。
 */
/**
 * 拉取双源并排序（置顶名单由 content/site/opensource.yaml 供给，缺省用 PINNED_DEFAULT）
 * @param pinned 置顶仓短名，顺序即展示顺序
 */
export async function loadProjects(pinned: string[] = PINNED_DEFAULT): Promise<RepoCard[]> {
  const [gitea, github] = await Promise.allSettled([fetchJson(GITEA_API), fetchJson(GITHUB_API)]);
  const byName = new Map<string, RepoCard>();

  for (const r of gitea.status === 'fulfilled' ? gitea.value : []) {
    const c = toCard(r, 'gitea');
    if (c) byName.set(c.name, c);
  }
  for (const r of github.status === 'fulfilled' ? github.value : []) {
    const c = toCard(r, 'github');
    if (!c) continue;
    const existing = byName.get(c.name);
    if (!existing) byName.set(c.name, c);
    else if (c.stars > existing.stars) existing.stars = c.stars; // 社区真值覆盖镜像计数
  }

  if (byName.size === 0) {
    const fb = (await import('../data/projects-fallback.json')).default as RepoCard[];
    return orderPinned(fb, pinned);
  }
  return orderPinned([...byName.values()], pinned);
}

function orderPinned(list: RepoCard[], pinned: string[]): RepoCard[] {
  return [...list].sort((a, b) => {
    const pa = pinned.indexOf(a.name), pb = pinned.indexOf(b.name);
    if (pa !== -1 || pb !== -1) return (pa === -1 ? 99 : pa) - (pb === -1 ? 99 : pb);
    return b.stars - a.stars;
  }).slice(0, 6);
}