#include "pch.h"
#include "tunnel.h"

#include <shlobj_core.h>
#include <strsafe.h>
#include <spdlog/sinks/wincolor_sink.h>
#include <spdlog/sinks/rotating_file_sink.h>
#include <spdlog/sinks/dup_filter_sink.h>

#include "usrerr.h"
#include "globalcfg.h"

#define CONFIG_FILE_NAME TEXT("tunnelsdk.ini")

static SDK_CONFIG g_globalConfig;

PSDK_CONFIG GetGlobalCfgInfo() {
    return &g_globalConfig;
}

int TunnelSDKInitEnv(const TCHAR *pWorkDir) {
    size_t                    length;
    BOOL                      logEnable = g_globalConfig.enableLog;
    spdlog::level::level_enum lv        = g_globalConfig.logLevel;

    memset(&g_globalConfig, 0, sizeof(SDK_CONFIG));
    g_globalConfig.logLevel  = lv;
    g_globalConfig.enableLog = logEnable;

    if (!logEnable) {
        spdlog::set_level(spdlog::level::off);
    }

    if (SUCCEEDED(
            SHGetFolderPath(NULL, CSIDL_WINDOWS | CSIDL_FLAG_NO_ALIAS, NULL, 0, g_globalConfig.systemDirectory))) {
        SPDLOG_ERROR(TEXT("Get Windows system directory error."));
        return -ERR_ITEM_EXISTS;
    }

    if (pWorkDir == nullptr) {
        // 获取当前文件默认路径
        GetCurrentDirectory(MAX_PATH, g_globalConfig.workDirectory);
    } else {
        if (StringCbLengthA(pWorkDir, MAX_PATH, &length) == S_OK && length == 0) {
            GetCurrentDirectory(MAX_PATH, g_globalConfig.workDirectory);
        } else {
            StringCbCopy(g_globalConfig.workDirectory, MAX_PATH, pWorkDir);
        }
    }

    StringCbPrintf(g_globalConfig.cfgPath, MAX_PATH, TEXT("%s\\%s"), g_globalConfig.workDirectory, CONFIG_FILE_NAME);

    if (FindWireguardExe(nullptr, 0) != ERR_SUCCESS) {
        SPDLOG_ERROR(TEXT("WireGuard not found, Please install WireGuard first or set the WireGuard Path."));
        return -ERR_ITEM_EXISTS;
    }

    return ERR_SUCCESS;
}

void TunnelSDKUnInit() {
}

static spdlog::level::level_enum logLevelToSpdlogLevel(LOG_LEVEL level) {
    switch (level) {
        case LOG_TRACE:
            return spdlog::level::level_enum::trace;
        case LOG_DEBUG:
            return spdlog::level::level_enum::debug;
        case LOG_INFO:
            return spdlog::level::level_enum::info;
        case LOG_WARN:
            return spdlog::level::level_enum::warn;
        case LOG_ERROR:
            return spdlog::level::level_enum::err;
        case LOG_CRITICAL:
            return spdlog::level::level_enum::critical;
        case LOG_OFF:
            return spdlog::level::level_enum::off;
        default:
            return spdlog::level::level_enum::info;
    }
}

void InitTunnelSDKLog(const TCHAR *pLogFile, LOG_LEVEL level) {
    TCHAR buf[MAX_PATH] = {0};

    if (pLogFile && strlen(pLogFile) > 0) {
        StringCbCopy(buf, MAX_PATH, pLogFile);
    } else {
        StringCbCopy(buf, MAX_PATH, TEXT("tunnelsdk.log"));
    }

    g_globalConfig.enableLog = TRUE;
    g_globalConfig.logLevel  = logLevelToSpdlogLevel(level);

    auto dupFileFilter = std::make_shared<spdlog::sinks::dup_filter_sink_st>(std::chrono::seconds(5));
    auto dupStdFilter  = std::make_shared<spdlog::sinks::dup_filter_sink_st>(std::chrono::seconds(5));

    dupFileFilter->add_sink(std::make_shared<spdlog::sinks::rotating_file_sink_mt>(buf, 1024 * 1024 * 5, 10));
    dupStdFilter->add_sink(std::make_shared<spdlog::sinks::wincolor_stdout_sink_mt>());

    std::vector<spdlog::sink_ptr> sinks {dupStdFilter, dupFileFilter};
    auto logger = std::make_shared<spdlog::logger>(TEXT("tunnelSDK"), sinks.begin(), sinks.end());
    spdlog::set_default_logger(logger);

    spdlog::set_level(g_globalConfig.logLevel);
    spdlog::set_pattern("[%Y-%m-%d %H:%M:%S.%e][%l][%s:%#] %v");
    spdlog::flush_every(std::chrono::seconds(1));

#if 0
    std::cout << "TRACE: " << logger->should_log(spdlog::level::trace) << std::endl;
    std::cout << "DEBUG: " << logger->should_log(spdlog::level::debug) << std::endl;
    std::cout << "INFO: " << logger->should_log(spdlog::level::info) << std::endl;
    std::cout << "WARN: " << logger->should_log(spdlog::level::warn) << std::endl;
    std::cout << "ERROR: " << logger->should_log(spdlog::level::err) << std::endl;
    std::cout << "CRITICAL: " << logger->should_log(spdlog::level::critical) << std::endl;
#endif

    SPDLOG_INFO(TEXT("Log({1}): {0}"), buf, static_cast<int>(level));
}

void TunnelLogEnable(bool enLog) {
    if (enLog) {
        spdlog::set_level(g_globalConfig.logLevel);
    } else {
        spdlog::set_level(spdlog::level::level_enum::off);
    }
}

int SetProtocolEncryptType(const PROTO_CRYPTO_TYPE type, const TCHAR *pProKey) {
    if (type > CRYPTO_BASE64 && type < CRYPTO_MAX) {
        if (pProKey == nullptr || strlen(pProKey) < 8) {
            return -ERR_INPUT_PARAMS;
        }
    }

    g_globalConfig.proCryptoType = type;
    StringCbCopy(g_globalConfig.proKeyBuf, 256, pProKey);

    SPDLOG_DEBUG(TEXT("Protocol crypto type: {0} with key [{1}]"),
                 static_cast<int>(type),
                 pProKey ? pProKey : TEXT(""));

    return ERR_SUCCESS;
}