/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
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** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
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****************************************************************************/

#ifndef TIMELINERENDERER_H
#define TIMELINERENDERER_H

#include <QQuickPaintedItem>
#include <QJSValue>
#include "qmlprofilertimelinemodelproxy.h"
#include "timelinemodelaggregator.h"

namespace QmlProfiler {
namespace Internal {

class TimelineRenderer : public QQuickPaintedItem
{
    Q_OBJECT
    Q_PROPERTY(qint64 startTime READ startTime WRITE setStartTime NOTIFY startTimeChanged)
    Q_PROPERTY(qint64 endTime READ endTime WRITE setEndTime NOTIFY endTimeChanged)
    Q_PROPERTY(QObject *profilerModelProxy READ profilerModelProxy WRITE setProfilerModelProxy NOTIFY profilerModelProxyChanged)
    Q_PROPERTY(bool selectionLocked READ selectionLocked WRITE setSelectionLocked NOTIFY selectionLockedChanged)
    Q_PROPERTY(int selectedItem READ selectedItem NOTIFY selectedItemChanged)
    Q_PROPERTY(int selectedModel READ selectedModel NOTIFY selectedModelChanged)
    Q_PROPERTY(int startDragArea READ startDragArea WRITE setStartDragArea NOTIFY startDragAreaChanged)
    Q_PROPERTY(int endDragArea READ endDragArea WRITE setEndDragArea NOTIFY endDragAreaChanged)

public:
    explicit TimelineRenderer(QQuickPaintedItem *parent = 0);

    qint64 startTime() const
    {
        return m_startTime;
    }

    qint64 endTime() const
    {
        return m_endTime;
    }

    bool selectionLocked() const
    {
        return m_selectionLocked;
    }

    int selectedItem() const
    {
        return m_selectedItem;
    }

    int selectedModel() const
    {
        return m_selectedModel;
    }

    int startDragArea() const
    {
        return m_startDragArea;
    }

    int endDragArea() const
    {
        return m_endDragArea;
    }

    TimelineModelAggregator *profilerModelProxy() const { return m_profilerModelProxy; }
    void setProfilerModelProxy(QObject *profilerModelProxy);

    Q_INVOKABLE int getYPosition(int modelIndex, int index) const;

    Q_INVOKABLE void selectNext();
    Q_INVOKABLE void selectPrev();
    Q_INVOKABLE int nextItemFromId(int modelIndex, int eventId) const;
    Q_INVOKABLE int prevItemFromId(int modelIndex, int eventId) const;
    Q_INVOKABLE void selectFromId(int modelIndex, int eventId);
    Q_INVOKABLE void selectNextFromId(int modelIndex, int eventId);
    Q_INVOKABLE void selectPrevFromId(int modelIndex, int eventId);

signals:
    void startTimeChanged(qint64 arg);
    void endTimeChanged(qint64 arg);
    void profilerModelProxyChanged(TimelineModelAggregator *list);
    void selectionLockedChanged(bool locked);
    void selectedItemChanged(int itemIndex);
    void selectedModelChanged(int modelIndex);
    void selectionChanged(int modelIndex, int itemIndex);
    void startDragAreaChanged(int startDragArea);
    void endDragAreaChanged(int endDragArea);
    void itemPressed(int modelIndex, int pressedItem);

public slots:
    void clearData();
    void requestPaint();


    void setStartTime(qint64 arg)
    {
        if (m_startTime != arg) {
            m_startTime = arg;
            emit startTimeChanged(arg);
        }
    }

    void setEndTime(qint64 arg)
    {
        if (m_endTime != arg) {
            m_endTime = arg;
            emit endTimeChanged(arg);
        }
    }

    void setSelectionLocked(bool locked)
    {
        if (m_selectionLocked != locked) {
            m_selectionLocked = locked;
            update();
            emit selectionLockedChanged(locked);
        }
    }

    void setStartDragArea(int startDragArea)
    {
        if (m_startDragArea != startDragArea) {
            m_startDragArea = startDragArea;
            emit startDragAreaChanged(startDragArea);
        }
    }

    void setEndDragArea(int endDragArea)
    {
        if (m_endDragArea != endDragArea) {
            m_endDragArea = endDragArea;
            emit endDragAreaChanged(endDragArea);
        }
    }

protected:
    virtual void paint(QPainter *);
    virtual void componentComplete();
    virtual void mousePressEvent(QMouseEvent *event);
    virtual void mouseReleaseEvent(QMouseEvent *event);
    virtual void mouseMoveEvent(QMouseEvent *event);
    virtual void hoverMoveEvent(QHoverEvent *event);

private:
    void drawItemsToPainter(QPainter *p, int modelIndex, int fromIndex, int toIndex);
    void drawSelectionBoxes(QPainter *p, int modelIndex, int fromIndex, int toIndex);
    void drawBindingLoopMarkers(QPainter *p, int modelIndex, int fromIndex, int toIndex);
    int modelFromPosition(int y);
    int rowFromPosition(int y);

    void manageClicked();
    void manageHovered(int mouseX, int mouseY);

    void setSelectedItem(int itemIndex)
    {
        if (m_selectedItem != itemIndex) {
            m_selectedItem = itemIndex;
            update();
            emit selectedItemChanged(itemIndex);
        }
    }

    void setSelectedModel(int modelIndex)
    {
        if (m_selectedModel != modelIndex) {
            m_selectedModel = modelIndex;
            update();
            emit selectedModelChanged(modelIndex);
        }
    }

private:
    static const int OutOfScreenMargin = 3; // margin to make sure the rectangles stay invisible
    inline void getItemXExtent(int modelIndex, int i, int &currentX, int &itemWidth);
    void resetCurrentSelection();

    qint64 m_startTime;
    qint64 m_endTime;
    qreal m_spacing;
    qreal m_spacedDuration;

    qint64 m_lastStartTime;
    qint64 m_lastEndTime;

    TimelineModelAggregator *m_profilerModelProxy;

    struct {
        qint64 startTime;
        qint64 endTime;
        int row;
        int eventIndex;
        int modelIndex;
    } m_currentSelection;

    int m_selectedItem;
    int m_selectedModel;
    bool m_selectionLocked;
    int m_startDragArea;
    int m_endDragArea;
};

} // namespace Internal
} // namespace QmlProfiler

QML_DECLARE_TYPE(QmlProfiler::Internal::TimelineRenderer)

#endif // TIMELINERENDERER_H