#include "BuiltInIcons.h"
#include "Bootstrap/EditorResources.h"
#include "Support/EmbeddedPngLoader.h"

#include <sstream>

namespace XCEngine::UI::Editor::App {

namespace {

void AppendLoadError(
    std::ostringstream& stream,
    std::string_view label,
    const std::string& error) {
    if (error.empty()) {
        return;
    }

    if (stream.tellp() > 0) {
        stream << '\n';
    }
    stream << label << ": " << error;
}

void LoadEmbeddedIconTexture(
    Host::NativeRenderer& renderer,
    UINT resourceId,
    std::string_view label,
    ::XCEngine::UI::UITextureHandle& outTexture,
    std::ostringstream& errorStream) {
    std::string error = {};
    if (!Support::LoadEmbeddedPngTexture(renderer, resourceId, outTexture, error)) {
        AppendLoadError(errorStream, label, error);
    }
}

} // namespace

void BuiltInIcons::Initialize(Host::NativeRenderer& renderer) {
    Shutdown();

    m_renderer = &renderer;

    std::ostringstream errorStream = {};
    LoadEmbeddedIconTexture(
        renderer,
        IDR_PNG_FOLDER_ICON,
        "folder_icon.png",
        m_folderIcon,
        errorStream);
    LoadEmbeddedIconTexture(
        renderer,
        IDR_PNG_GAMEOBJECT_ICON,
        "gameobject_icon.png",
        m_gameObjectIcon,
        errorStream);
    LoadEmbeddedIconTexture(
        renderer,
        IDR_PNG_SCENE_ICON,
        "scene_icon.png",
        m_sceneIcon,
        errorStream);

    m_lastError = errorStream.str();
}

void BuiltInIcons::Shutdown() {
    if (m_renderer != nullptr) {
        m_renderer->ReleaseTexture(m_folderIcon);
        m_renderer->ReleaseTexture(m_gameObjectIcon);
        m_renderer->ReleaseTexture(m_sceneIcon);
    }

    m_renderer = nullptr;
    m_lastError.clear();
}

const ::XCEngine::UI::UITextureHandle& BuiltInIcons::Resolve(
    BuiltInIconKind kind) const {
    switch (kind) {
    case BuiltInIconKind::Folder:
        return m_folderIcon;
    case BuiltInIconKind::GameObject:
        return m_gameObjectIcon;
    case BuiltInIconKind::Scene:
        return m_sceneIcon;
    default:
        return m_folderIcon;
    }
}

const std::string& BuiltInIcons::GetLastError() const {
    return m_lastError;
}

} // namespace XCEngine::UI::Editor::App