#include "src/pub.h"
#include <CLI11.hpp>
#include <filesystem>
#include <fmt/format.h>
#include <fstream>
#include <iostream>
#include <list>
#include <string>

#define CODECREATE_VERSION "1.0.0"

enum ProjectType { TYPE_CONSOLE = 0, TYPE_QT_CONSOLE, TYPE_QT_WIDGET };

struct MParam {
    std::string point_code{};
    std::string qt_path{};
    std::string exe_dir{};
    std::string des_path{};
    std::string des_dir{};
    std::string name{};
    std::string shortkey{};
    ProjectType type{TYPE_CONSOLE};
};

MParam gParam;

namespace fs = std::filesystem;
bool parse_cmd(int argc, char** argv, MParam& param)
{
    std::string intro("");
    intro.append(CODECREATE_VERSION);
    CLI::App app(intro);

    std::string type;

    app.add_option("-p,--path", param.des_path, "project position");
    app.add_option("-n,--name", param.name, "project name");
    app.add_option("-t,--type", type, "0-console,1-qtconsole,2-qtdialog");
    app.add_option("-q,--qt", param.qt_path, "qt path, bin dir's parent dir.");
    app.add_option("-k,--key", param.shortkey, "if not empty, set f5 and alt+g.");

    try {
        CLI11_PARSE(app, argc, argv);
        param.type = static_cast<ProjectType>(std::stoi(type));
        param.qt_path = CUtil::replace(param.qt_path, "\\", "/");
        return true;
    } catch (const CLI::ParseError& e) {
        std::cerr << "Error parsing command line: " << e.what() << std::endl;
        return false;
    }
}

bool copy_dir(const std::string& source_dir, const std::string& des_dir, bool add_dir = true)
{
    if (!fs::exists(source_dir) || !fs::exists(des_dir)) {
        return false;
    }

    auto replaceAll = [](const std::string& str, const std::string& from, const std::string& to) {
        std::string tp(str);
        if (from.empty()) {
            return str;
        }
        std::size_t start_pos = 0;
        while ((start_pos = tp.find(from, start_pos)) != std::string::npos) {
            tp.replace(start_pos, from.length(), to);
            start_pos += to.length();
        }
        return tp;
    };

    fs::path des_parent_dir;
    if (add_dir) {
        des_parent_dir = fs::path(des_dir).append(fs::path(source_dir).filename().string());
        if (!fs::exists(des_parent_dir)) {
            fs::create_directories(des_parent_dir);
        }
    } else {
        des_parent_dir = fs::path(des_dir);
    }

    std::list<fs::path> paths{};
    for (const auto& entry : fs::directory_iterator(source_dir)) {
        paths.push_back(entry);
    }

    while (!paths.empty()) {
        fs::path path = paths.front();
        paths.pop_front();

        fs::path destination(replaceAll(path.string(), source_dir, des_parent_dir.string()));
        if (fs::is_directory(path)) {
            if (!fs::exists(destination)) {
                fs::create_directories(destination);
            }
            for (const auto& entry : fs::directory_iterator(path)) {
                paths.push_back(entry);
            }
            continue;
        }
        fs::copy_file(path, destination, fs::copy_options::overwrite_existing);
    }
    return true;
}

bool create_base()
{
    if (gParam.name.empty()) {
        std::cout << fmt::format("project name is empty.") << std::endl;
        return false;
    }

    if (!fs::exists(gParam.des_path)) {
        std::cout << fmt::format("{} is not exit.", gParam.des_path) << std::endl;
        return false;
    }

    fs::path des_dir(gParam.des_path);
    gParam.des_dir = des_dir.append(gParam.name).string();

    if (fs::exists(des_dir)) {
        std::cout << fmt::format("{} is already exist.", des_dir.string()) << "\n";
        return false;
    }

    if (!fs::create_directory(des_dir)) {
        std::cout << fmt::format("{} create failed.", des_dir.string()) << std::endl;
        return false;
    } else {
        std::cout << fmt::format("{} create success.", des_dir.string()) << std::endl;
    }

    fs::path point_code_dir(des_dir);
    gParam.point_code = point_code_dir.append(".vscode").string();

    if (!fs::exists(point_code_dir)) {
        if (fs::create_directory(point_code_dir)) {
            std::cout << fmt::format("{} create success.", point_code_dir.string()) << std::endl;
        } else {
            std::cout << fmt::format("{} create failed.", point_code_dir.string()) << std::endl;
            return false;
        }
    }

    fs::path settings_file(point_code_dir);
    fs::path clang_file(des_dir);
    settings_file.append("settings.json");
    clang_file.append(".clang-format");

    fs::path source_settings(gParam.exe_dir);
    fs::path clang_format(gParam.exe_dir);
    source_settings.append(".vscode").append("settings.json");
    clang_format.append("template").append(".clang-format");

    std::cout << fmt::format("source settings is: {}", source_settings.string()) << std::endl;
    std::cout << fmt::format("clang_format is: {}", clang_format.string()) << std::endl;

    if (fs::copy_file(source_settings, settings_file)) {
        std::cout << fmt::format("copy to {} success.", settings_file.string()) << std::endl;
    } else {
        std::cout << fmt::format("copy to {} success.", settings_file.string()) << std::endl;
    }

    if (fs::copy_file(clang_format, clang_file)) {
        std::cout << fmt::format("copy to {} success.", clang_format.string()) << std::endl;
    } else {
        std::cout << fmt::format("copy to {} success.", clang_format.string()) << std::endl;
    }

    return true;
}

bool copy_console()
{
    fs::path console_path(gParam.exe_dir);
    console_path.append("template").append("console");
    copy_dir(console_path.string(), gParam.des_dir, false);

    fs::path cmakelist(gParam.des_dir);
    cmakelist.append("CMakeLists.txt");

    std::string str_content;
    if (!CUtil::read_txt(cmakelist.string(), str_content)) {
        std::cout << fmt::format("can't open file {}", cmakelist.string());
        return false;
    }

    std::string rep("replace");
    std::string ncontent = CUtil::replace(str_content, rep, gParam.name);

    if (!CUtil::save_txt(cmakelist.string(), ncontent)) {
        std::cout << fmt::format("can't write file {}", cmakelist.string());
        return false;
    }

    return true;
}

bool copy_qt_widget()
{
    fs::path widget_path(gParam.exe_dir);
    widget_path.append("template").append("qt-widget");
    copy_dir(widget_path.string(), gParam.des_dir, false);

    fs::path cmakelist(gParam.des_dir);
    cmakelist.append("CMakeLists.txt");

    std::string str_content;
    if (!CUtil::read_txt(cmakelist.string(), str_content)) {
        std::cout << fmt::format("can't open file {}", cmakelist.string());
        return false;
    }

    std::string rep("QT_PATH");
    std::string rep2("untitled3");
    std::string ncontent = CUtil::replace(str_content, rep, gParam.qt_path);
    ncontent = CUtil::replace(ncontent, rep2, gParam.name);

    if (!CUtil::save_txt(cmakelist.string(), ncontent)) {
        std::cout << fmt::format("can't write file {}", cmakelist.string());
        return false;
    }

    fs::path settings(gParam.point_code);
    settings.append("settings.json");

    std::string settings_content;
    if (!CUtil::read_txt(settings.string(), settings_content)) {
        std::cout << fmt::format("can't open file {}", settings.string());
        return false;
    }

    std::string from("replace");
    std::string to(gParam.qt_path + "/bin");
    settings_content = CUtil::replace(settings_content, from, to);

    if (!CUtil::save_txt(settings.string(), settings_content)) {
        std::cout << fmt::format("can't write file {}", settings.string());
        return false;
    }

    return true;
}

bool copy_qt_console()
{
    fs::path qt_console_path(gParam.exe_dir);
    qt_console_path.append("template").append("qt-console");

    fs::path cmakelist(qt_console_path);
    fs::path main_file(qt_console_path);
    cmakelist.append("CMakeLists.txt");
    main_file.append("main.cpp");

    fs::path save_main(gParam.des_dir);
    save_main.append("main.cpp");

    if (!fs::copy_file(main_file, save_main)) {
        std::cout << fmt::format("can't copy main file {}", main_file.string());
        return false;
    }

    std::string str_content;
    if (!CUtil::read_txt(cmakelist.string(), str_content)) {
        std::cout << fmt::format("can't open file {}", cmakelist.string());
        return false;
    }

    std::string rep("QT_PATH");
    std::string rep2("PROJECT_NAME");
    std::string ncontent = CUtil::replace(str_content, rep, gParam.qt_path);
    ncontent = CUtil::replace(ncontent, rep2, gParam.name);

    fs::path save_cmake(gParam.des_dir);
    save_cmake.append("CMakeLists.txt");

    if (!CUtil::save_txt(save_cmake.string(), ncontent)) {
        std::cout << fmt::format("can't write file {}", save_cmake.string());
        return false;
    }

    fs::path settings(gParam.point_code);
    settings.append("settings.json");

    std::string settings_content;
    if (!CUtil::read_txt(settings.string(), settings_content)) {
        std::cout << fmt::format("can't open file {}", settings.string());
        return false;
    }

    std::string from("replace");
    std::string to(gParam.qt_path + "/bin");
    settings_content = CUtil::replace(settings_content, from, to);

    if (!CUtil::save_txt(settings.string(), settings_content)) {
        std::cout << fmt::format("can't write file {}", settings.string());
        return false;
    }

    return true;
}

bool set_key()
{
    std::string shortkey_file = CUtil::get_keybindings_file();
    return true;
}

bool handle_gdb_qtprinter()
{
#if _MSC_VER
    fs::path template_dir(gParam.exe_dir);
    template_dir.append("template");

    fs::path qt5_file(template_dir);
    fs::path qt6_file(template_dir);
    qt5_file.append("qt5.natvis");
    qt6_file.append("qt6.natvis");

    fs::path des_qt5_file(gParam.point_code);
    fs::path des_qt6_file(gParam.point_code);
    des_qt5_file.append("qt5.natvis");
    des_qt6_file.append("qt6.natvis");

    if (fs::copy_file(qt5_file, des_qt5_file)) {
        std::cout << fmt::format("copy to {} success.", des_qt5_file.string()) << std::endl;
    } else {
        std::cout << fmt::format("copy to {} success.", des_qt5_file.string()) << std::endl;
    }

    if (fs::copy_file(qt6_file, des_qt6_file)) {
        std::cout << fmt::format("copy to {} success.", des_qt6_file.string()) << std::endl;
    } else {
        std::cout << fmt::format("copy to {} success.", des_qt6_file.string()) << std::endl;
    }
#endif

    std::string home = CUtil::get_home();
    if (home.empty()) {
        std::cout << "can't get home dir.\n";
        return false;
    }

    fs::path gdb_des(home);
    gdb_des.append(".gdbinit");

    fs::path gdb_source(gParam.exe_dir);
    gdb_source.append("template").append("qt-printer").append(".gdbinit");

    if (!fs::exists(gdb_des)) {
        if (fs::copy_file(gdb_source, gdb_des)) {
            std::cout << fmt::format("copy to {} success.", gdb_des.string()) << std::endl;
        } else {
            std::cout << fmt::format("copy to {} success.", gdb_des.string()) << std::endl;
        }
    }

    fs::path gdb_path(home);
    fs::path gdb_source_path(gParam.exe_dir);
    gdb_path.append(".gdb");
    gdb_source_path.append("template").append("qt-printer").append("QtPrinters");

    if (fs::exists(gdb_path)) {
        return true;
    }

    fs::create_directory(gdb_path);
    
    copy_dir(gdb_source_path.string(), gdb_path.string(), true);

    return true;
}

int main(int argc, char** argv)
{
    std::cout << "\n";

    if (!parse_cmd(argc, argv, gParam)) {
        return -1;
    }

#if _DEBUG
    std::cout << "Debug Mode." << std::endl;
    fs::path exe_path(CUtil::get_exe_path());
    gParam.exe_dir = exe_path.parent_path().parent_path().string();
    std::cout << fmt::format("current_path is: {}", gParam.exe_dir) << "\n";
#else
    std::cout << "Release Mode." << std::endl;
    fs::path exe_path(CUtil::get_exe_path());
    gParam.exe_dir = exe_path.parent_path().string();
    std::cout << fmt::format("current_path is: {}", gParam.exe_dir) << "\n";
#endif


    // if (!gParam.shortkey.empty()) {
    //     set_key();
    //     return 0;
    // }

    switch (gParam.type) {
    case TYPE_CONSOLE: {
        if (!create_base()) {
            return -1;
        }
        copy_console();
        break;
    }
    case TYPE_QT_CONSOLE: {
        if (gParam.qt_path.empty()) {
            std::cout << "qt path is empty.\n";
            break;
        }
        if (!create_base()) {
            return -1;
        }
        copy_qt_console();
        handle_gdb_qtprinter();
        break;
    }
    case TYPE_QT_WIDGET: {
        if (gParam.qt_path.empty()) {
            std::cout << "qt path is empty.\n";
            break;
        }
        if (!create_base()) {
            return -1;
        }
        copy_qt_widget();
        handle_gdb_qtprinter();
        break;
    }
    default:
        std::cout << fmt::format("{} is not support.", static_cast<int>(gParam.type)) << "\n";
        break;
    }

    return 0;
}