// utils/ipDiscovery.js
class IPDiscovery {
  constructor() {
    this.commonIPs = [
      '192.168.1.100',
      '192.168.0.100',
      '10.0.0.100',
      '127.0.0.1'
    ];
    this.defaultPort = 8080;
    this.defaultPath = '/websocket';
  }

  // 检测指定IP的WebSocket服务是否可用
  async checkWebSocketServer(ip, port = this.defaultPort) {
    return new Promise((resolve) => {
      const url = `ws://${ip}:${port}${this.defaultPath}`;
      let socket = new WebSocket(url);
      let timeoutTimer = null;

      const cleanup = () => {
        if (socket) {
          socket.close();
          socket = null;
        }
        if (timeoutTimer) {
          clearTimeout(timeoutTimer);
        }
      };

      timeoutTimer = setTimeout(() => {
        cleanup();
        resolve(false);
      }, 3000);

      socket.onopen = () => {
        cleanup();
        resolve(true);
      };

      socket.onerror = () => {
        cleanup();
        resolve(false);
      };
    });
  }

  // 自动发现可用的WebSocket服务端
  async autoDiscoverServer() {
    console.log('开始自动发现WebSocket服务端...');
    
    for (let ip of this.commonIPs) {
      console.log(`检测 ${ip}:${this.defaultPort}...`);
      const isAvailable = await this.checkWebSocketServer(ip, this.defaultPort);
      
      if (isAvailable) {
        console.log(`找到可用的WebSocket服务端: ${ip}:${this.defaultPort}`);
        return {
          ip: ip,
          port: this.defaultPort,
          path: this.defaultPath
        };
      }
    }

    console.log('未找到可用的WebSocket服务端，使用默认配置');
    return {
      ip: this.commonIPs[0],
      port: this.defaultPort,
      path: this.defaultPath
    };
  }

  // 获取本机网络信息（尝试获取）
  async getLocalNetworkInfo() {
    return new Promise((resolve) => {
      // 获取网络类型
      uni.getNetworkType({
        success: (res) => {
          console.log('网络类型:', res.networkType);
        }
      });

      // 获取WiFi信息（部分平台支持）
      // 注意：这个API可能需要特定权限
      if (uni.getConnectedWifi) {
        uni.getConnectedWifi({
          success: (res) => {
            console.log('WiFi信息:', res.wifi);
          },
          fail: (err) => {
            console.log('获取WiFi信息失败:', err);
          }
        });
      }

      // 返回默认的本地IP段
      resolve({
        localIPRange: '192.168.1.x'
      });
    });
  }
}

export default new IPDiscovery();