#pragma once
#include "Pattern/Pattern.h"
#include "Midi/MidiType.h"
#include "Midi/Time/TimePos.h"

enum class EPatternInstanceAlignment
{
	MidiTick,
	Sample,
};

class FPatternInstance
{
	FRIEND_THREAD_MESSAGE(EndSetting)
public:
	virtual ~FPatternInstance() = default;

	FPatternInstance(FPattern* InOwner, int32 InTrackIndex, AudioFrame InPos, TRange<AudioFrame> InRange) : TrackIndex(InTrackIndex), Owner(InOwner)
	{
		TimeRange = InRange;
		Pos = InPos;
	}
	
	void RequestDestroy();
	FPattern* GetOwner() const { return Owner; }
	void RequestEndSetting();

	virtual void SetRange(TRange<AudioFrame> InRange);
	virtual void SetMidiPos(MidiTick InPos);
	virtual MidiTick GetMidiPos() { return Pos.Ticks(); }

	AudioFrame GetLength() const { return TimeRange.Size<AudioFrame>(); }
	
	virtual void Process(AudioFrame SequencePos, AudioFrame Length);
	
	int32 TrackIndex; // 在PlayList中的位置(Track的Index)
	TRange<AudioFrame> TimeRange;
	AudioFrame Pos;
protected:
	virtual void EndSetting();
	FPattern* Owner;
};