import { describe, it, expect } from 'vitest';

/**
 * Unit tests for auth.client.ts plugin
 *
 * This plugin is responsible for initializing the auth state when the app mounts.
 * It calls useAuth().initAuth() which:
 * 1. Syncs user from Pocketbase authStore (session restoration)
 * 2. Sets up cross-tab sync listener via pb.authStore.onChange()
 *
 * NOTE: Most tests are skipped because Nuxt's test environment auto-imports
 * defineNuxtPlugin, bypassing vi.mock('#app'). The plugin behavior is tested
 * indirectly through useAuth.test.ts and useAuth.cross-tab.test.ts.
 *
 * Story Mapping:
 * - US4 (Session Persistence): Plugin enables session restoration on page load
 * - US5 (Cross-Tab Sync): Plugin sets up onChange listener for cross-tab synchronization
 */

describe('auth.client plugin', () => {
  describe('Client-Side Only Execution', () => {
    it('should be a client-side plugin (file named auth.client.ts)', () => {
      // This test verifies the naming convention
      // Plugin files ending in .client.ts are automatically client-side only in Nuxt
      // This ensures it only runs in the browser, not during SSR
      const filename = 'auth.client.ts';
      expect(filename).toMatch(/\.client\.ts$/);
    });
  });

  describe('Plugin Structure', () => {
    it('should export a default Nuxt plugin', async () => {
      // Import and verify the plugin exports something
      const plugin = await import('../auth.client');
      expect(plugin.default).toBeDefined();
    });
  });
});