const ReliableAPIClient = require('./reliable-api-client');

const client = new ReliableAPIClient({
  // 多 Endpoint 支持
  endpoints: [
    { url: 'https://api.example.com', priority: 10 },  // 高优先级
    { url: 'https://backup.example.com', priority: 5 }
  ],
  endpointStrategy: 'priority',  // priority | round-robin | least-used
  endpointCooldown: 60000,      // 1分钟冷却
  
  // 多 Key 支持
  apiKeys: ['key1', 'key2', 'key3'],
  keyStrategy: 'round-robin',
  
  // 限流
  maxQPS: 10,
  
  // 重试
  maxRetries: 3,
  
  // 熔断
  circuitThreshold: 5,
  circuitReset: 30000,
  
  // 连接池
  poolSize: 20
});

// 添加更多 Endpoint
client.addEndpoint('https://new-endpoint.com', priority: 8);
client.addAPIKey('new-key');

// 请求
const data = await client.get('/users');
const result = await client.post('/orders', { item: 'test' });

// 统计
console.log('Endpoints:', client.getEndpointStats());
console.log('Keys:', client.getKeyStats());
console.log('Circuit:', client.getCircuitBreakerStatus(url));

请求 → [限流器] → [Endpoint选择] → [Key选择] → [熔断器] → 发送
                                      ↓
                              [指数退避重试]
                                      ↓
                              [失败 → 切换Endpoint/Key]