//********************************** Banshee Engine (www.banshee3d.com) **************************************************//
//**************** Copyright (c) 2016 Marko Pintera (marko.pintera@gmail.com). All rights reserved. **********************//
#include "UndoRedo/BsCmdReparentSO.h"
#include "Scene/BsSceneObject.h"

namespace bs
{
	CmdReparentSO::CmdReparentSO(const String& description, const Vector<HSceneObject>& sceneObjects, const HSceneObject& newParent)
		:EditorCommand(description), mSceneObjects(sceneObjects), mNewParent(newParent)
	{
		for(auto& sceneObject : mSceneObjects)
		{
			mOldParents.push_back(sceneObject->getParent());
		}
	}

	void CmdReparentSO::execute(const Vector<HSceneObject>& sceneObjects, const HSceneObject& newParent,
		const String& description)
	{
		// Register command and commit it
		CmdReparentSO* command = new (bs_alloc<CmdReparentSO>()) CmdReparentSO(description, sceneObjects, newParent);
		SPtr<CmdReparentSO> commandPtr = bs_shared_ptr(command);

		UndoRedo::instance().registerCommand(commandPtr);
		commandPtr->commit();
	}

	void CmdReparentSO::execute(HSceneObject& sceneObject, const HSceneObject& newParent, const String& description)
	{
		// Register command and commit it
		CmdReparentSO* command = new (bs_alloc<CmdReparentSO>()) CmdReparentSO(description, { sceneObject }, newParent);
		SPtr<CmdReparentSO> commandPtr = bs_shared_ptr(command);

		UndoRedo::instance().registerCommand(commandPtr);
		commandPtr->commit();
	}

	void CmdReparentSO::commit()
	{
		if(mNewParent.isDestroyed())
			return;

		UINT32 cnt = 0;
		for(auto& sceneObject : mSceneObjects)
		{
			if(!sceneObject.isDestroyed())
				sceneObject->setParent(mNewParent);

			cnt++;
		}
	}

	void CmdReparentSO::revert()
	{
		UINT32 cnt = 0;
		for(auto& sceneObject : mSceneObjects)
		{
			if(!sceneObject.isDestroyed() && !mOldParents[cnt].isDestroyed())
				sceneObject->setParent(mOldParents[cnt]);

			cnt++;
		}
	}
}