// SPDX-License-Identifier: GPL-2.0
#ifndef PROFILEWIDGET2_H
#define PROFILEWIDGET2_H

#include <QGraphicsView>
#include <vector>
#include <memory>

// /* The idea of this widget is to display and edit the profile.
//  * It has:
//  * 1 - ToolTip / Legend item, displays every information of the current mouse position on it, plus the legends of the maps.
//  * 2 - ToolBox, displays the QActions that are used to do special stuff on the profile ( like activating the plugins. )
//  * 3 - Cartesian Axis for depth ( y )
//  * 4 - Cartesian Axis for Gases ( y )
//  * 5 - Cartesian Axis for Time  ( x )
//  *
//  * It needs to be dynamic, things should *flow* on it, not just appear / disappear.
//  */
#include "core/units.h"
#include "core/subsurface-qt/divelistnotifier.h"

class ProfileScene;
class RulerItem2;
struct dive;
class ToolTipItem;
class DiveEventItem;
class DivePlannerPointsModel;
class DiveHandler;
class QGraphicsSimpleTextItem;
class QModelIndex;

class ProfileWidget2 : public QGraphicsView {
	Q_OBJECT
public:
	enum State {
		PROFILE,
		EDIT,
		PLAN,
		INIT
	};

	struct RenderFlags {
		static constexpr int None = 0;
		static constexpr int Instant = 1 << 0;
		static constexpr int DontRecalculatePlotInfo = 1 << 1;
	};

	// Pass null as plannerModel if no support for planning required
	ProfileWidget2(DivePlannerPointsModel *plannerModel, double dpr, QWidget *parent = 0);
	~ProfileWidget2();
	void resetZoom();
	void plotDive(const struct dive *d, int dc, int flags = RenderFlags::None);
	void setProfileState(const struct dive *d, int dc);
	void setPlanState(const struct dive *d, int dc);
	void setEditState(const struct dive *d, int dc);
	bool isPlanner() const;
	void clear();
#ifndef SUBSURFACE_MOBILE
	bool eventFilter(QObject *, QEvent *) override;
#endif
	State currentState;

signals:
	void stopAdded(); // only emitted in edit mode
	void stopRemoved(int count); // only emitted in edit mode
	void stopMoved(int count); // only emitted in edit mode
	void stopEdited(); // only emitted in edit mode

public
slots: // Necessary to call from QAction's signals.
	void settingsChanged();
	void actionRequestedReplot(bool triggered);
	void divesChanged(const QVector<dive *> &dives, DiveField field);
#ifndef SUBSURFACE_MOBILE
	void updateThumbnail(QString filename, QImage thumbnail, duration_t duration);
	void profileChanged(dive *d);

	/* this is called for every move on the handlers. maybe we can speed up this a bit? */
	void divePlannerHandlerMoved();
	void divePlannerHandlerClicked();
	void divePlannerHandlerReleased();
#endif

private:
	void setProfileState(); // keep currently displayed dive
	void resizeEvent(QResizeEvent *event) override;
#ifndef SUBSURFACE_MOBILE
	void wheelEvent(QWheelEvent *event) override;
	void mouseMoveEvent(QMouseEvent *event) override;
	void contextMenuEvent(QContextMenuEvent *event) override;
	void mouseDoubleClickEvent(QMouseEvent *event) override;
	void mousePressEvent(QMouseEvent *event) override;
	void mouseReleaseEvent(QMouseEvent *event) override;
	void keyPressEvent(QKeyEvent *e) override;
	void addGasChangeMenu(QMenu &m, QString menuTitle, const struct dive &d, int dcNr, int changeTime);
#endif
	void replot();
	void setZoom(int level);
	void addGasSwitch(int tank, int seconds);
	void changeGas(int index, int newCylinderId);
	void setupSceneAndFlags();
	void addItemsToScene();
	void setupItemOnScene();
	struct plot_data *getEntryFromPos(QPointF pos);
	void updateThumbnails();
	void addDivemodeSwitch(int seconds, int divemode);
	void addBookmark(int seconds);
	void splitDive(int seconds);
	void addSetpointChange(int seconds);
	void removeEvent(DiveEventItem *item);
	void editName(DiveEventItem *item);
	void makeFirstDC();
	void deleteCurrentDC();
	void splitCurrentDC();
	void renameCurrentDC();

	DivePlannerPointsModel *plannerModel; // If null, no planning supported.
	int zoomLevel;
	double zoomedPosition;	// Position, when zoomed: 0.0 = beginning, 1.0 = end.
#ifndef SUBSURFACE_MOBILE
	ToolTipItem *toolTipItem;
#endif
	const struct dive *d;
	int dc;
	bool empty; // No dive shown.
	bool panning; // Currently panning.
	double panningOriginalMousePosition;
	double panningOriginalProfilePosition;

#ifndef SUBSURFACE_MOBILE
	void repositionDiveHandlers();
#endif
	friend class DiveHandler;
	bool shouldCalculateMax; // Calculate maximum time and depth (default). False when dragging handles.
	std::vector<int> selectedDiveHandleIndices() const;

	// We store a const pointer to the shown dive. However, the undo commands want
	// (understandably) a non-const pointer. Since the profile has a context-menu
	// with actions, it needs such a non-const pointer. This function turns the
	// currently shown dive into such a pointer. Ugly, yes.
	struct dive *mutable_dive() const;
};

#endif // PROFILEWIDGET2_H