#ifndef DISTRIBUTION_SERVICE_NETWORK_H
#define DISTRIBUTION_SERVICE_NETWORK_H


#include "CCString.h"
#include "Socket/CCSocket.h"

#ifdef _WIN32
#elif __linux__
#include <sys/ioctl.h>
#endif

class NetWorkInfo {
public:
    static CTL::String getGw() {
#ifdef _WIN32
        // Windows实现
        return CTL::String("");
#elif __linux__
        // Linux实现：从/proc/net/route读取默认网关
        std::ifstream routeFile("/proc/net/route");
        std::string line;

        // 跳过标题行
        std::getline(routeFile, line);

        while (std::getline(routeFile, line)) {
            std::istringstream iss(line);
            std::string iface, dest, gateway;

            if (iss >> iface >> dest >> gateway) {
                // 查找默认路由(目标地址为00000000)
                if (dest == "00000000" && gateway != "00000000") {
                    // 将十六进制网关地址转换为点分十进制格式
                    unsigned int gw;
                    std::stringstream ss;
                    ss << std::hex << gateway;
                    ss >> gw;

                    // 注意字节序转换
                    gw = (gw & 0xFF) << 24 | ((gw >> 8) & 0xFF) << 16 |
                         ((gw >> 16) & 0xFF) << 8 | (gw >> 24) & 0xFF;

                    in_addr addr;
                    addr.s_addr = htonl(gw);
                    return CTL::String(inet_ntoa(addr));
                }
            }
        }
        return CTL::String("");
#endif
    } // 获取网关
    static CTL::String getNm() {
#ifdef _WIN32
        // Windows实现
        return CTL::String("");
#elif __linux__
        // Linux实现：尝试从常见网络接口获取子网掩码
        const char* interfaces[] = {"eth0", "wlan0", "enp0s3", "ens33","enp4s0"};
        int sock = socket(AF_INET, SOCK_DGRAM, 0);

        if (sock < 0) {
            return CTL::String("");
        }

        for (int i = 0; i < 5; i++) {
            struct ifreq ifr{};
            strncpy(ifr.ifr_name, interfaces[i], IFNAMSIZ - 1);

            // 获取子网掩码
            if (ioctl(sock, SIOCGIFNETMASK, &ifr) == 0) {
                struct sockaddr_in* netmask = reinterpret_cast<struct sockaddr_in *>(&ifr.ifr_netmask);
                close(sock);
                return CTL::String(inet_ntoa(netmask->sin_addr));
            }
        }

        close(sock);
        return CTL::String("");
#endif
    } // 获取子网掩码
};

#endif