/**
 * OmniCard AI (CRMmp) - 移动端多媒体离线缓存持久化策略单元测试
 * 严格遵循 TDD 规范
 */

describe('Point 64 (P2): 移动端名片离线多媒体缓存与本地持久化策略 (Media Cache)', () => {
  let cacheMod: any;
  let storageMap: Record<string, string>;

  beforeEach(() => {
    storageMap = {};

    (global as any).uni = {
      getStorageSync: jest.fn((key: string) => storageMap[key] || ''),
      setStorageSync: jest.fn((key: string, val: string) => {
        storageMap[key] = String(val);
      }),
      removeStorageSync: jest.fn((key: string) => {
        delete storageMap[key];
      }),
    };

    // @ts-ignore
    cacheMod = require('../../../mpuniapp/common/media-cache.uts');
    cacheMod.clearAllMediaCache();
  });

  afterEach(() => {
    delete (global as any).uni;
  });

  describe('1. 缓存存储与命中获取 (saveMediaToCache & getCachedMedia)', () => {
    const remoteUrl = 'https://cdn.omnicard.ai/avatars/alex.png';
    const localPath = '_doc/cache/avatars/alex.png';

    it('写入缓存后应能成功命中并返回本地文件路径', () => {
      cacheMod.saveMediaToCache(remoteUrl, localPath, 24); // 24小时有效
      const hit = cacheMod.getCachedMedia(remoteUrl);

      expect(hit).toBeDefined();
      expect(hit.localPath).toBe(localPath);
      expect(hit.isExpired).toBe(false);
    });

    it('未缓存的 URL 查询应返回 null', () => {
      const miss = cacheMod.getCachedMedia('https://cdn.omnicard.ai/not-cached.png');
      expect(miss).toBeNull();
    });
  });

  describe('2. 缓存过期淘汰机制 (pruneExpiredMediaCache)', () => {
    it('已过期的缓存条目应被自动清理淘汰', () => {
      const oldUrl = 'https://cdn.omnicard.ai/old.png';
      cacheMod.saveMediaToCache(oldUrl, '_doc/old.png', -1); // 传入负数表示已过期

      const beforePrune = cacheMod.getCachedMedia(oldUrl);
      expect(beforePrune.isExpired).toBe(true);

      const prunedCount = cacheMod.pruneExpiredMediaCache();
      expect(prunedCount).toBe(1);

      // 清理后再次获取应为 null
      expect(cacheMod.getCachedMedia(oldUrl)).toBeNull();
    });
  });

  describe('3. 缓存容量上限保护', () => {
    it('应提供当前缓存条目数量统计', () => {
      cacheMod.saveMediaToCache('https://cdn.omnicard.ai/1.png', '_doc/1.png');
      cacheMod.saveMediaToCache('https://cdn.omnicard.ai/2.png', '_doc/2.png');

      const stats = cacheMod.getMediaCacheStats();
      expect(stats.totalEntries).toBe(2);
    });
  });
});