#include "PatternInstance.h"

#include "Singleton/PortAudioAPI.h"
#include "Thread/MainThreadEventList.h"

DECLARE_THREAD_MESSAGE(FPortAudioAPI, EndSetting,
FPatternInstance* PatternInstance;
)
{
	Args.PatternInstance->EndSetting();
}

void FPatternInstance::RequestDestroy()
{
	Owner->RequestDestroyInstance(this);
}

void FPatternInstance::RequestEndSetting()
{
	PUSH_THREAD_EVENT(EndSetting, this);
}

void FPatternInstance::SetRange(TRange<AudioFrame> InRange)
{
	TimeRange = InRange;
	EndSetting();
}

void FPatternInstance::SetMidiPos(MidiTick InPos)
{
	Pos.SetTick(InPos);
	EndSetting();
}

void FPatternInstance::Process(AudioFrame SequencePos, AudioFrame Length)
{
	const AudioFrame& LowerBoundValue = TimeRange.GetLowerBoundValue();
	AudioFrame PatternPos = SequencePos - Pos + LowerBoundValue;
	const AudioFrame EndPatternPos = PatternPos + Length;
	if (TimeRange.Contains(EndPatternPos) || TimeRange.Contains(PatternPos))
	{
		const double RealLength = FMath::Min<double>(Length, EndPatternPos - TimeRange.GetLowerBoundValue());
		PatternPos = FMath::Max<AudioFrame>(AudioFrame(), PatternPos);
		Owner->OnPlay.Broadcast(this, PatternPos, RealLength);
		Owner->Process(PatternPos, RealLength);
	}
}

void FPatternInstance::EndSetting() 
{
	Owner->Reset();
}