#pragma once
#include "core.h"
#include "DirectXCore.h"

using namespace std;

// Abstract base class for all nodes of the scene graph.  
// This scene graph implements the Composite Design Pattern

class SceneNode;

typedef shared_ptr<SceneNode>	SceneNodePointer;

class SceneNode : public enable_shared_from_this<SceneNode>
{
public:
	SceneNode(wstring name) {_name = name; XMStoreFloat4x4(&_worldTransformation, XMMatrixIdentity()); };
	~SceneNode(void) {};

	// Core methods
	virtual bool Initialise() = 0;
	virtual void Update(FXMMATRIX& currentWorldTransformation) { XMStoreFloat4x4(&_combinedWorldTransformation, XMLoadFloat4x4(&_worldTransformation) * currentWorldTransformation); }
	virtual void Render() = 0;
	virtual void Shutdown() = 0;

	virtual void DoTestUpdate(float inputTest) { _testInt = inputTest; }

	void SetWorldTransform(FXMMATRIX& worldTransformation) { XMStoreFloat4x4(&_worldTransformation, worldTransformation); }
	void AddToWorldTransform(FXMMATRIX& transformation) { XMStoreFloat4x4(&_worldTransformation, XMLoadFloat4x4(&_worldTransformation) * transformation); }
		
	// Although only required in the composite class, these are provided
	// in order to simplify the code base.
	virtual void Add(SceneNodePointer node) {}
	virtual void Remove(SceneNodePointer node) {};
	virtual	SceneNodePointer Find(wstring name) { return (_name == name) ? shared_from_this() : nullptr; }
	virtual SceneNodePointer GetFirstChild() { return shared_from_this(); }

protected:
	XMFLOAT4X4			_worldTransformation;
	XMFLOAT4X4			_combinedWorldTransformation;
	wstring				_name;
	float _testInt = 0.0f;
};