Gui.h

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#pragma once
 
#include <cstdlib>
#include <filesystem>
#include <imgui.h>
#include <imgui_impl_glfw.h>
#include <imgui_impl_opengl3.h>
#include <imgui_internal.h>
#include <nfd.h>
#include <ostream>
#include <vector>

inline ImGuiCol InvertedImCol(uint8_t r, uint8_t g, uint8_t b) {
    return IM_COL32(255 - r, 255 - g, 255 - b, 255);
}

inline std::ostream& operator<<(std::ostream& os, const ImGuiStyle& style) {
    os << "ImGuiStyle { "
       << "Alpha: " << style.Alpha << ", "
       << "DisabledAlpha: " << style.DisabledAlpha << ", "
       << "WindowPadding: (" << style.WindowPadding.x << ", "
       << style.WindowPadding.y << "), "
       << "WindowRounding: " << style.WindowRounding << ", "
       << "WindowBorderSize: " << style.WindowBorderSize << ", "
       << "FramePadding: (" << style.FramePadding.x << ", "
       << style.FramePadding.y << "), "
       << "FrameRounding: " << style.FrameRounding << ", "
       << "ItemSpacing: (" << style.ItemSpacing.x << ", " << style.ItemSpacing.y
       << "), "
       << "ScrollbarSize: " << style.ScrollbarSize << ", "
       << "ScrollbarRounding: " << style.ScrollbarRounding << ", "
       << "GrabMinSize: " << style.GrabMinSize << ", "
       << "GrabRounding: " << style.GrabRounding << ", "
       << "TabRounding: " << style.TabRounding << " }\n";
 
    os << "Colors:\n";
    for (int i = 0; i < ImGuiCol_COUNT; ++i) {
        const ImVec4& col = style.Colors[i];
        os << "  [" << ImGuiCol_(i) << "] (" << col.x << ", " << col.y << ", "
           << col.z << ", " << col.w << ")\n";
    }
 
    return os;
}

class FileDialog {
    public:
    FileDialog(
        const char* filterList = nullptr, const char* defaultPath = nullptr)
        : m_FilterList(filterList), m_DefaultPath(defaultPath) {}

    [[nodiscard]] std::filesystem::path Open() const {
        nfdchar_t* outPath = nullptr;
        nfdresult_t result =
            NFD_OpenDialog(m_FilterList, m_DefaultPath, &outPath);
 
        if (result == NFD_OKAY) {
            std::filesystem::path path(outPath);
            std::free(outPath);
            return path;
        }
        return {};
    }

    [[nodiscard]] std::filesystem::path Save() const {
        nfdchar_t* outPath = nullptr;
        nfdresult_t result =
            NFD_SaveDialog(m_FilterList, m_DefaultPath, &outPath);
 
        if (result == NFD_OKAY) {
            std::filesystem::path path(outPath);
            std::free(outPath);
            return path;
        }
        return {};
    }

    [[nodiscard]] std::vector<std::filesystem::path> OpenMultiple() const {
        nfdpathset_t pathSet;
        nfdresult_t result =
            NFD_OpenDialogMultiple(m_FilterList, m_DefaultPath, &pathSet);
 
        if (result == NFD_OKAY) {
            std::vector<std::filesystem::path> paths;
            size_t count = NFD_PathSet_GetCount(&pathSet);
            paths.reserve(count);
            for (size_t i = 0; i < count; ++i) {
                nfdchar_t* path = NFD_PathSet_GetPath(&pathSet, i);
                paths.emplace_back(path);
            }
            NFD_PathSet_Free(&pathSet);
            return paths;
        }
        return {};
    }

    [[nodiscard]] std::filesystem::path Dir() const {
        nfdchar_t* outPath = nullptr;
        nfdresult_t result = NFD_PickFolder(m_DefaultPath, &outPath);
 
        if (result == NFD_OKAY) {
            std::filesystem::path path(outPath);
            std::free(outPath);
            return path;
        }
        return {};
    }
 
    private:
    const char* m_FilterList;
    const char* m_DefaultPath;
};