#include "Features/Scene/SceneEditCommandRoute.h"

#include "Scene/EditorSceneRuntime.h"

#include <utility>

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

namespace {

UIEditorHostCommandEvaluationResult BuildEvaluationResult(
    bool executable,
    std::string message) {
    UIEditorHostCommandEvaluationResult result = {};
    result.executable = executable;
    result.message = std::move(message);
    return result;
}

UIEditorHostCommandDispatchResult BuildDispatchResult(
    bool commandExecuted,
    std::string message) {
    UIEditorHostCommandDispatchResult result = {};
    result.commandExecuted = commandExecuted;
    result.message = std::move(message);
    return result;
}

} // namespace

void SceneEditCommandRoute::BindSceneRuntime(EditorSceneRuntime* sceneRuntime) {
    m_sceneRuntime = sceneRuntime;
}

UIEditorHostCommandEvaluationResult SceneEditCommandRoute::EvaluateEditCommand(
    std::string_view commandId) const {
    if (m_sceneRuntime == nullptr) {
        return BuildEvaluationResult(false, "Scene runtime is unavailable.");
    }

    if (commandId == "edit.undo") {
        return m_sceneRuntime->CanUndoTransformEdit()
            ? BuildEvaluationResult(true, "Undo the last scene transform edit.")
            : BuildEvaluationResult(false, "Scene transform history is empty.");
    }

    if (commandId == "edit.redo") {
        return m_sceneRuntime->CanRedoTransformEdit()
            ? BuildEvaluationResult(true, "Redo the last scene transform edit.")
            : BuildEvaluationResult(false, "Scene redo history is empty.");
    }

    if (!m_sceneRuntime->HasSceneSelection()) {
        return BuildEvaluationResult(false, "Select a scene object first.");
    }

    const std::string selectedName =
        m_sceneRuntime->GetSelectedDisplayName().empty()
            ? std::string("GameObject")
            : m_sceneRuntime->GetSelectedDisplayName();

    if (commandId == "edit.delete") {
        return BuildEvaluationResult(
            true,
            "Delete scene object '" + selectedName + "'.");
    }

    if (commandId == "edit.duplicate") {
        return BuildEvaluationResult(
            true,
            "Duplicate scene object '" + selectedName + "'.");
    }

    if (commandId == "edit.rename") {
        return BuildEvaluationResult(
            false,
            "Scene viewport does not expose inline rename yet.");
    }

    if (commandId == "edit.cut" ||
        commandId == "edit.copy" ||
        commandId == "edit.paste") {
        return BuildEvaluationResult(
            false,
            "Scene clipboard transfer has no bound owner in the current shell.");
    }

    return BuildEvaluationResult(false, "Scene does not expose this edit command.");
}

UIEditorHostCommandDispatchResult SceneEditCommandRoute::DispatchEditCommand(
    std::string_view commandId) {
    const UIEditorHostCommandEvaluationResult evaluation =
        EvaluateEditCommand(commandId);
    if (!evaluation.executable) {
        return BuildDispatchResult(false, evaluation.message);
    }

    if (m_sceneRuntime == nullptr) {
        return BuildDispatchResult(false, "Scene runtime is unavailable.");
    }

    if (commandId == "edit.undo") {
        return m_sceneRuntime->UndoTransformEdit()
            ? BuildDispatchResult(true, "Undid the last scene transform edit.")
            : BuildDispatchResult(false, "Scene transform history is empty.");
    }

    if (commandId == "edit.redo") {
        return m_sceneRuntime->RedoTransformEdit()
            ? BuildDispatchResult(true, "Redid the last scene transform edit.")
            : BuildDispatchResult(false, "Scene redo history is empty.");
    }

    const std::string selectedItemId = m_sceneRuntime->GetSelectedItemId();
    const std::string selectedName =
        m_sceneRuntime->GetSelectedDisplayName().empty()
            ? std::string("GameObject")
            : m_sceneRuntime->GetSelectedDisplayName();

    if (selectedItemId.empty()) {
        return BuildDispatchResult(false, "Select a scene object first.");
    }

    if (commandId == "edit.delete") {
        return m_sceneRuntime->DeleteGameObject(selectedItemId)
            ? BuildDispatchResult(
                  true,
                  "Deleted scene object '" + selectedName + "'.")
            : BuildDispatchResult(
                  false,
                  "Failed to delete the selected scene object.");
    }

    if (commandId == "edit.duplicate") {
        return !m_sceneRuntime->DuplicateGameObject(selectedItemId).empty()
            ? BuildDispatchResult(
                  true,
                  "Duplicated scene object '" + selectedName + "'.")
            : BuildDispatchResult(
                  false,
                  "Failed to duplicate the selected scene object.");
    }

    return BuildDispatchResult(false, "Scene does not expose this edit command.");
}

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