#pragma once

#include <qelapsedtimer.h>
#include <qqmlintegration.h>

#include "internal/circularbuffer.hpp"
#include "tickingservice.hpp"

namespace ZShell::services {

class NetworkUsage : public TickingService {
	Q_OBJECT
	QML_ELEMENT
	QML_SINGLETON

	Q_PROPERTY(qreal downloadSpeed READ downloadSpeed NOTIFY changed)
	Q_PROPERTY(qreal uploadSpeed READ uploadSpeed NOTIFY changed)
	Q_PROPERTY(qreal downloadTotal READ downloadTotal NOTIFY changed)
	Q_PROPERTY(qreal uploadTotal READ uploadTotal NOTIFY changed)
	Q_PROPERTY(int historyLength READ historyLength NOTIFY historyLengthChanged)

	Q_PROPERTY(
		ZShell::internal::CircularBuffer* downloadBuffer READ downloadBuffer
			CONSTANT)
	Q_PROPERTY(
		ZShell::internal::CircularBuffer* uploadBuffer READ uploadBuffer
			CONSTANT)

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

	[[nodiscard]] qreal downloadSpeed() const;
	[[nodiscard]] qreal uploadSpeed() const;
	[[nodiscard]] qreal downloadTotal() const;
	[[nodiscard]] qreal uploadTotal() const;
	[[nodiscard]] int historyLength() const;

	[[nodiscard]] internal::CircularBuffer* downloadBuffer() const;
	[[nodiscard]] internal::CircularBuffer* uploadBuffer() const;

	signals:
	void changed();
	void historyLengthChanged();

	protected:
	void tick() override;

	private:
	void setHistoryLength(int length);

	qreal m_downloadSpeed = 0.0;
	qreal m_uploadSpeed = 0.0;
	qreal m_downloadTotal = 0.0;
	qreal m_uploadTotal = 0.0;
	int m_historyLength = 30;

	internal::CircularBuffer* m_downloadBuffer = nullptr;
	internal::CircularBuffer* m_uploadBuffer = nullptr;

	quint64 m_prevRx = 0;
	quint64 m_prevTx = 0;
	bool m_initialized = false;
	QElapsedTimer m_timer;
};

} // namespace ZShell::services