#include "Features/Inspector/InspectorSubject.h"

#include "Scene/EditorSceneRuntime.h"

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

InspectorSelectionSource ResolveInspectorSelectionSource(
    const EditorSession& session,
    const EditorSceneRuntime& sceneRuntime) {
    const bool hasProjectSelection =
        session.selection.kind == EditorSelectionKind::ProjectItem;
    const bool hasSceneSelection = sceneRuntime.HasSceneSelection();
    const std::uint64_t projectStamp = session.selection.stamp;
    const std::uint64_t sceneStamp = sceneRuntime.GetSelectionStamp();

    if (projectStamp > sceneStamp) {
        return hasProjectSelection
            ? InspectorSelectionSource::Project
            : InspectorSelectionSource::None;
    }

    if (sceneStamp > projectStamp) {
        return hasSceneSelection
            ? InspectorSelectionSource::Scene
            : InspectorSelectionSource::None;
    }

    if (hasSceneSelection) {
        return InspectorSelectionSource::Scene;
    }

    if (hasProjectSelection) {
        return InspectorSelectionSource::Project;
    }

    return InspectorSelectionSource::None;
}

InspectorSubject BuildInspectorSubject(
    const EditorSession& session,
    const EditorSceneRuntime& sceneRuntime) {
    InspectorSubject subject = {};
    subject.source = ResolveInspectorSelectionSource(session, sceneRuntime);

    switch (subject.source) {
    case InspectorSelectionSource::Project:
        subject.kind = InspectorSubjectKind::ProjectAsset;
        subject.projectAsset.selection = session.selection;
        break;

    case InspectorSelectionSource::Scene:
        if (const auto* gameObject = sceneRuntime.GetSelectedGameObject();
            gameObject != nullptr) {
            subject.kind = InspectorSubjectKind::SceneObject;
            subject.sceneObject.gameObject = gameObject;
            subject.sceneObject.itemId = sceneRuntime.GetSelectedItemId();
            subject.sceneObject.displayName =
                sceneRuntime.GetSelectedDisplayName();
        }
        break;

    case InspectorSelectionSource::None:
    default:
        break;
    }

    if (!subject.HasSelection()) {
        subject.source = InspectorSelectionSource::None;
    }

    return subject;
}

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