#pragma once
#include "CoreMinimal.h"

class FChannelInterface;
class FMixerTrack;

enum class EChannelNodeType
{
	NoneType,
	MixerNode,
	NullNode,
};

class FChannelNode
{
public:
	DECLARE_MULTICAST_DELEGATE_OneParam(FChannelNodeMulticastDelegate, FChannelNode*)
	DECLARE_DELEGATE_OneParam(FChannelNodeDelegate, FChannelNode*)

	FChannelNode(FChannelInterface* InOwner, EChannelNodeType InNodeType) : Owner(InOwner), NodeType(InNodeType)
	{
		
	}
	virtual ~FChannelNode() { OnChannelNodeDestroyed.Broadcast(this); }
	virtual FString GetName() { return ""; }
	
	virtual const TArray<float*>& GetChannelHeaders() = 0;

	FChannelInterface* Owner;
	EChannelNodeType NodeType;
	static FChannelNodeMulticastDelegate OnChannelNodeDestroyed;
};

class FMixerChannelNode : public FChannelNode
{
public:
	FMixerChannelNode(FChannelInterface* InOwner, FMixerTrack* InTrack, int32 InNodeIndex);
	virtual FString GetName() override;

	virtual const TArray<float*>& GetChannelHeaders() override;
	FMixerTrack* GetTrack() const { return Track; }
private:
	FMixerTrack* Track;
	TArray<float*> ChannelHeaders;
	int32 NodeIndex;
};

class FNullChannelNode : public FChannelNode
{
	static FNullChannelNode Instance;
public:
	FNullChannelNode() : FChannelNode(nullptr, EChannelNodeType::NullNode) {}
	static FNullChannelNode* Get() { return &Instance; }
	virtual FString GetName() override { return "NullChannelNode"; }

	virtual const TArray<float*>& GetChannelHeaders() override;
};