#include <CLI11.hpp>
#include <iostream>
#include <of_util.h>
#include <regex>

#include "client.h"
#include "config.h"
#include "version.h"

#ifdef _WIN32
#include <fcntl.h>
#include <io.h>
#include <windows.h>
#ifndef ENABLE_VIRTUAL_TERMINAL_PROCESSING
#define ENABLE_VIRTUAL_TERMINAL_PROCESSING 0x0004
#endif
#endif

std::shared_ptr<CServerConfig> g_Config = nullptr;
int parse_cmd(int argc, char** argv, CmdParam& param)
{
    std::string intro(
        fmt::format("tsc cmd introduce, version: {}\nopensource: {}", VERSION_NUM, VERSION_URL));
    CLI::App app(intro);

    app.add_option("-u, --use", param.use_config, "使用服务器地址组(值为使用--show中显示的序号)");
    app.add_option("-a, --append", param.appendValue, "添加服务器地址组(地址格式：127.0.0.1:9898:注释)");
    app.add_flag("-s, --show", param.showValue, "查看服务器地址组");
    app.add_option("-r, --remove", param.removeValue, "移除服务器地址组(值为使用--show中显示的序号)");
    app.add_flag("-d, --direct", param.direct_use, "添加服务器时直接使用此服务器。");
    app.add_flag("-l, --last", param.last_use, "直接使用之前最后一次使用的服务器。");

    if (argc == 1) {
        std::cout << app.help() << std::endl;
        return 0;
    }
    // 这里的 CLI11_PARSE 在程序没有输入或者仅输入--help(-h)时，会直接返回，后面代码都不会执行。
    // 当有自定义的参数被输入时，后面代码会执行。
    try {
        CLI11_PARSE(app, argc, argv);
    } catch (const CLI::ParseError& e) {
        return app.exit(e);
    }
    param.parsed = true;
    return 0;
}

bool exec_cmd(CmdParam& param, bool& run)
{
    run = false;
    // 如果是展示
    if (param.showValue) {
        std::vector<TransmSet> set;
        if (!g_Config->read_ini(set)) {
            return false;
        }
        for (const auto& item : set) {
            TLOGI("{} => {}:{} {}", item.group, item.ip, item.port, item.comment);
        }
        return true;
    }
    if (param.use_config != -1) {
        run = true;
        return true;
    }
    if (!param.appendValue.empty() && !param.removeValue.empty()) {
        TLOGW("append and remove can't simultaneous operate!");
        return false;
    }
    if (!param.appendValue.empty()) {
        std::regex pattern(R"((\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}):(\d+)(?::(.*))?)");
        std::smatch matches;
        std::string ip, port, comment;
        if (std::regex_match(param.appendValue, matches, pattern)) {
            ip = matches[1].str();
            port = matches[2].str();
            comment = matches.size() > 3 ? matches[3].str() : "default";
        }
        auto id = g_Config->append_ini(ip, std::stol(port), comment);
        if (id < 0) {
            TLOGW("add {}:{} failed.", ip, port);
            return false;
        }
        TLOGI("add {}:{} success.", ip, port);
        param.use_config = id;
        return true;
    }
    if (!param.removeValue.empty()) {
        if (!g_Config->remove_ini(std::stol(param.removeValue))) {
            TLOGW("remove config num=[{}] failed, please check!", param.removeValue);
            return false;
        }
        TLOGI("remove config num=[{}] success!", param.removeValue);
        return true;
    }
    if (param.last_use) {
        return true;
    }
    TLOGW("not matched!", param.removeValue);
    return false;
}

int main(int argc, char* argv[])
{
#ifdef _WIN32
    HANDLE hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
    DWORD mode;
    GetConsoleMode(hConsole, &mode);
    mode |= ENABLE_VIRTUAL_TERMINAL_PROCESSING;
    SetConsoleMode(hConsole, mode);
#endif

    std::shared_ptr<int> deleter(new int(), [](int* p) {
        fc_recovery_color();
        delete p;
    });

    g_Config = std::make_shared<CServerConfig>();
    if (!g_Config->baseInit()) {
        return -1;
    }

    bool run = false;
    CmdParam param;
    parse_cmd(argc, argv, param);
    if (!param.parsed) {
        return 0;
    }
    if (!exec_cmd(param, run)) {
        TLOGW("exec_cmd failed!");
        return -1;
    }
    if (!run && !param.direct_use && !param.last_use) {
        return 0;
    }

    std::string ip;
    long port{};
    if (param.last_use) {
        if (!g_Config->get_last_use(ip, port)) {
            return -1;
        }
    } else {
        std::vector<TransmSet> set;
        if (!g_Config->read_ini(set)) {
            return -1;
        }
        TransmSet use;
        if (!g_Config->get_ini(set, param.use_config, use)) {
            TLOGW("Not found config by num:[{}]", param.use_config);
            return -1;
        }
        ip = use.ip;
        port = use.port;
    }
    g_Config->save_last_use(ip, port);
    TLOGI("Build At {} {} under {} on {}", __DATE__, __TIME__, VERSION_GIT_COMMIT, VERSION_GIT_BRANCH);
    TLOGI("use ip => [{}], port => [{}]", ip, port);
    CClient client;
    client.run(ip, std::to_string(port));
    TLOGI("exit ==========");
    return 0;
}