// AsioUDPNetDLL.cpp : 定义 DLL 应用程序的导出函数。

#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#else
#include <dlfcn.h>
#endif

#include "AsioUDPNetDLL.h"
#include "UDPServer.h"
#include "CustomLog.h"
#include "ConfigReader.h"
#include "asio.hpp"
#include <thread>
#include <string>

using asio::ip::udp;

asio::io_context io_context;
UDPServer* g_pUDPServer = nullptr;
std::thread g_Thread;
ConfigReader g_Config;

std::string getExecutablePath() {
#ifdef _WIN32
    char path[MAX_PATH];
    GetModuleFileNameA(NULL, path, MAX_PATH);
    std::string fullPath(path);
    return fullPath.substr(0, fullPath.find_last_of("\\/"));
#else
    char path[PATH_MAX];
    ssize_t count = readlink("/proc/self/exe", path, PATH_MAX);
    if (count <= 0) return "";
    std::string fullPath(path, count);
    return fullPath.substr(0, fullPath.find_last_of("/"));
#endif
}

bool CreateFilePath(const std::string& logDirName) {
    std::string workPath = getExecutablePath();
    if (workPath.empty()) {
        std::cerr << "Failed to get executable path" << std::endl;
        return false;
    }

    std::string logDir = workPath + "/" + logDirName;
    return CustomLogger::getInstance().initialize(logDir);
}

void InitParam() {
    std::string configPath = getExecutablePath() + "/config";
    if (!g_Config.load(configPath)) {
        LOG_WARNING("Failed to load config file: " + configPath);
    }
}

extern "C" bool NetDll_InitUDPNet() {
    try {
        if (g_pUDPServer) {
            LOG_WARNING("已初始化过网络模块跳过初始化。");
            return false;
        }

        std::string configPath = getExecutablePath() + "/config";
        if (!g_Config.load(configPath)) {
            LOG_WARNING("Failed to load config file: " + configPath);
        }

        int nLocalPort = g_Config.getInt("NetData.LocalPort", 12000);
        int nRemoteSize = g_Config.getInt("NetData.RemoteCount", 0);
        if (nRemoteSize==0)
        {
            return false;
        }
        g_pUDPServer = new UDPServer(io_context, nLocalPort);
        if (nRemoteSize <= 1)
        {

            std::string remoteIP = g_Config.getString("NetData.RemoteIP", "127.0.0.1");
            int nRemotePort = g_Config.getInt("NetData.RemotePort", 12001);

            LOG_INFO("读取配置：本地localPort：" + std::to_string(nLocalPort) +
                "  远端RemoteIP:" + remoteIP +
                "  远端RemotePort" + std::to_string(nRemotePort));
            g_pUDPServer->addSendTarget(remoteIP.c_str(), nRemotePort);
        }
        else
        {
            for (int nIndex=0;nIndex<nRemoteSize;nIndex++)
            {
                std::string strNumber = std::to_string(nIndex+1);
                std::string remoteIP = g_Config.getString("NetData.RemoteIP"+ strNumber, "127.0.0.1");
                int nRemotePort = g_Config.getInt("NetData.RemotePort"+ strNumber, 12001);
                g_pUDPServer->addSendTarget(remoteIP.c_str(), nRemotePort);
            }
        }
        LOG_INFO("始化过网络模块");
        return true;
    }
    catch (std::exception& e) {
        LOG_ERROR("异常: " + std::string(e.what()));
        return false;
    }
    return false;
}

extern "C" bool NetDll_DestroyUDPNet() {
    if (g_pUDPServer) {
        NetDll_StopThread();
        delete g_pUDPServer;
        g_pUDPServer = nullptr;
        LOG_INFO("网络模块销毁成功。");
        return true;
    }
    LOG_WARNING("网络模块已销毁跳过销毁。");
    return false;
}

extern "C" void NetDll_StartThread() {
    g_Thread = std::thread([]() {
        io_context.run();
        });
    return;
}

extern "C" void NetDll_StopThread() {
    io_context.stop();
    if (g_Thread.joinable()) {
        g_Thread.join();
    }
    return;
}

extern "C" bool NetDll_SendUDPData(HDDSType nType, void* pData, long nLen) {
    if (!g_pUDPServer) {
        LOG_WARNING("未初始化网络");
        return false;
    }
    HDDSCMD pCmd;
    pCmd.flags = 0;
    if (pCmd.SetcData(nType, pData, nLen)) {
        if (g_pUDPServer) {
            g_pUDPServer->blockingSendData(&pCmd, pCmd.GetBufLen());
            return true;
        }
        LOG_WARNING("未初始化网络");
        return true;
    }
    else {
        LOG_WARNING("数据包长度超出网络包大小");
        return false;
    }
}

extern "C" bool NetDll_SetNetQueue(HDDSCMDQueue * pCMDQueue) {
    if (!g_pUDPServer) {
        LOG_WARNING("未初始化网络");
        return false;
    }
    g_pUDPServer->setCMDQueue(pCMDQueue);
    return true;
}

extern "C"  bool NetDll_LibraryInit()
{
    CreateFilePath("logs");
    InitParam();
    return true;
}


extern "C" void NetDll_LibraryCleanup()
{
    NetDll_DestroyUDPNet();
    CustomLogger::getInstance().shutdown();
}

// 跨平台的库初始化和清理
#ifdef _WIN32
BOOL APIENTRY DllMain(HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpReserved) {
    switch (ul_reason_for_call) {
    case DLL_PROCESS_ATTACH:
        CreateFilePath("logs");
        InitParam();
        NetDll_InitUDPNet();
        break;
    case DLL_PROCESS_DETACH:
        NetDll_DestroyUDPNet();
        CustomLogger::getInstance().shutdown();
        break;
    }
    return TRUE;
}
#else
// Linux 共享库构造函数和析构函数
/*
__attribute__((constructor))
static void library_init() {
    CreateFilePath("logs");
    InitParam();
    NetDll_InitUDPNet();
}

__attribute__((destructor))
static void library_cleanup() {
    NetDll_DestroyUDPNet();
    CustomLogger::getInstance().shutdown();
}*/
#endif


extern "C" bool NetDll_SetMultiSendParams(UDPTargetConfig * targets, int count) {
    if (!g_pUDPServer) {
        LOG_WARNING("网络未初始化");
        return false;
    }

    if (!targets || count <= 0) {
        LOG_WARNING("无效的目标参数");
        return false;
    }

    std::vector<UDPTarget> udp_targets;
    for (int i = 0; i < count; i++) {
        UDPTarget target;
        target.ip = targets[i].ip;
        target.port = targets[i].port;
        target.resolved = false;
        udp_targets.push_back(target);
    }

    g_pUDPServer->setMultiSendParams(udp_targets);
    return true;
}

extern "C" bool NetDll_AddSendTarget(const char* hostIP, int nPort) {
    if (!g_pUDPServer) {
        LOG_WARNING("网络未初始化");
        return false;
    }

    if (!hostIP || nPort <= 0) {
        LOG_WARNING("无效的目标参数");
        return false;
    }

    g_pUDPServer->addSendTarget(hostIP, nPort);
    return true;
}

extern "C" bool NetDll_RemoveSendTarget(const char* hostIP, int nPort) {
    if (!g_pUDPServer) {
        LOG_WARNING("网络未初始化");
        return false;
    }

    if (!hostIP || nPort <= 0) {
        LOG_WARNING("无效的目标参数");
        return false;
    }

    g_pUDPServer->removeSendTarget(hostIP, nPort);
    return true;
}

extern "C" void NetDll_ClearSendTargets() {
    if (g_pUDPServer) {
        g_pUDPServer->clearSendTargets();
    }
}

extern "C" bool NetDll_SendUDPDataToMulti(HDDSType nType, void* pData, long nLen) {
    if (!g_pUDPServer) {
        LOG_WARNING("网络未初始化");
        return false;
    }

    HDDSCMD pCmd;
    pCmd.flags = 0;
    if (pCmd.SetcData(nType, pData, nLen)) {
        int result = g_pUDPServer->blockingSendDataToMulti(&pCmd, pCmd.GetBufLen());
        return result > 0;
    }
    else {
        LOG_WARNING("数据格式错误无法发送网络包");
        return false;
    }
}