/**
 * ClawdHub skill scanning
 * 
 * Fetches all available skills from the ClawdHub registry
 * and transforms them into SkillsCatalogItem format.
 */

import { fetchClawdHubSkills } from './api.js';

const MAX_PAGES = 20; // Safety limit to prevent infinite loops

/**
 * Scan ClawdHub registry for all available skills
 * @returns {Promise<{ ok: boolean, items?: Array, error?: Object }>}
 */
export async function scanClawdHub() {
  try {
    const allItems = [];
    let cursor = null;

    for (let page = 0; page < MAX_PAGES; page++) {
      const { items, nextCursor } = await fetchClawdHubSkills({ cursor });

      for (const item of items) {
        const latestVersion = item.tags?.latest || item.latestVersion?.version || '1.0.0';

        allItems.push({
          sourceId: 'clawdhub',
          repoSource: 'clawdhub:registry',
          repoSubpath: null,
          gitIdentityId: null,
          skillDir: item.slug,
          skillName: item.slug,
          frontmatterName: item.displayName || item.slug,
          description: item.summary || null,
          installable: true,
          warnings: [],
          // ClawdHub-specific metadata
          clawdhub: {
            slug: item.slug,
            version: latestVersion,
            displayName: item.displayName,
            owner: item.owner?.handle || null,
            downloads: item.stats?.downloads || 0,
            stars: item.stats?.stars || 0,
            versionsCount: item.stats?.versions || 1,
            createdAt: item.createdAt,
            updatedAt: item.updatedAt,
          },
        });
      }

      if (!nextCursor) {
        break;
      }
      cursor = nextCursor;
    }

    // Sort by downloads (most popular first)
    allItems.sort((a, b) => (b.clawdhub?.downloads || 0) - (a.clawdhub?.downloads || 0));

    return { ok: true, items: allItems };
  } catch (error) {
    console.error('ClawdHub scan error:', error);
    return {
      ok: false,
      error: {
        kind: 'networkError',
        message: error instanceof Error ? error.message : 'Failed to fetch skills from ClawdHub',
      },
    };
  }
}