#pragma once

#include <qobject.h>
#include <qqmlintegration.h>
#include <qvector.h>

namespace ZShell::internal {

class CircularBuffer : public QObject {
	Q_OBJECT
	QML_ELEMENT

	Q_PROPERTY(
		int capacity READ capacity WRITE setCapacity NOTIFY capacityChanged)
	Q_PROPERTY(int count READ count NOTIFY countChanged)
	Q_PROPERTY(QList<qreal> values READ values NOTIFY valuesChanged)
	Q_PROPERTY(qreal maximum READ maximum NOTIFY valuesChanged)
	Q_PROPERTY(
		int smoothingRadius READ smoothingRadius WRITE setSmoothingRadius NOTIFY
			smoothingRadiusChanged)

	public:
	explicit CircularBuffer(QObject* parent = nullptr);

	[[nodiscard]] int capacity() const;
	void setCapacity(int capacity);

	[[nodiscard]] int count() const;
	[[nodiscard]] QList<qreal> values() const;
	[[nodiscard]] qreal maximum() const;

	[[nodiscard]] int smoothingRadius() const;
	void setSmoothingRadius(int radius);

	Q_INVOKABLE void push(qreal value);
	Q_INVOKABLE void clear();
	Q_INVOKABLE [[nodiscard]] qreal at(int index) const;

	Q_INVOKABLE [[nodiscard]] qreal smoothedAt(int index) const;

	signals:
	void capacityChanged();
	void countChanged();
	void valuesChanged();
	void smoothingRadiusChanged();

	private:
	void writeSmoothedAt(int logicalIndex);

	void updateSmoothedTail();

	void recomputeAllSmoothed();

	QVector<qreal> m_data;
	QVector<qreal> m_smoothed;
	int m_head = 0;
	int m_count = 0;
	int m_capacity = 0;
	int m_smoothingRadius = 0;
};

} // namespace ZShell::internal