#pragma once

#include <qcolor.h>
#include <qeasingcurve.h>
#include <qobject.h>
#include <qqmlengine.h>
#include <qqmlintegration.h>

namespace ZShell::controls {

class LinearIndicatorManager;

class LinearIndicatorSegment : public QObject {
	Q_OBJECT
	QML_ELEMENT
	QML_UNCREATABLE(
		"LinearIndicatorSegments can only be retrieved from a "
		"LinearIndicatorManager.")

	Q_PROPERTY(qreal startFraction READ startFraction NOTIFY updated FINAL)
	Q_PROPERTY(qreal endFraction READ endFraction NOTIFY updated FINAL)
	Q_PROPERTY(int gapSize READ gapSize NOTIFY updated FINAL)

	public:
	explicit LinearIndicatorSegment(int gap, QObject* parent = nullptr);

	qreal startFraction() const;
	qreal endFraction() const;
	int gapSize() const;

	signals:
	void updated();

	private:
	qreal m_startFraction;
	qreal m_endFraction;
	int m_gapSize;

	friend LinearIndicatorManager;
};

class LinearIndicatorManager : public QObject {
	Q_OBJECT
	QML_ELEMENT

	Q_PROPERTY(
		QList<ZShell::controls::LinearIndicatorSegment*> activeIndicators READ
			activeIndicators CONSTANT FINAL)

	Q_PROPERTY(qreal progress READ progress WRITE update NOTIFY updated FINAL)
	Q_PROPERTY(
		qreal completeEndProgress READ completeEndProgress WRITE
			updateCompleteEndProgress NOTIFY updated FINAL)
	Q_PROPERTY(int gap READ gap WRITE setGap NOTIFY updated FINAL)

	Q_PROPERTY(qreal duration READ duration CONSTANT FINAL)
	Q_PROPERTY(qreal completeEndDuration READ completeEndDuration CONSTANT FINAL)

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

	QList<LinearIndicatorSegment*> activeIndicators() const;

	qreal progress() const;
	qreal completeEndProgress() const;

	int gap() const;
	void setGap(int gap);

	int duration() const;
	int completeEndDuration() const;

	void update(qreal progress);
	void updateCompleteEndProgress(qreal progress);

	signals:
	void updated();

	private:
	static constexpr int SEGMENTS = 2;

	std::array<QEasingCurve, 4> m_interpolators;
	qreal m_progress;
	qreal m_completeEndProgress;
	int m_gap;

	std::array<LinearIndicatorSegment*, SEGMENTS> m_activeIndicators;
};

} // namespace ZShell::controls