/*
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all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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*/

#ifndef __OverlayProfileSessionListener_H__
#define __OverlayProfileSessionListener_H__

#include "OgreOverlayPrerequisites.h"
#include "OgreProfiler.h"

namespace Ogre  {
    class Overlay;
    class OverlayContainer;
    class OverlayElement;

    /** \addtogroup Optional
    *  @{
    */
    /** \addtogroup Overlays
    *  @{
    */

    /** Concrete impl. of the ProfileSessionListener which visualizes
        the profling results using overlays.
    */
    class _OgreOverlayExport OverlayProfileSessionListener : public ProfileSessionListener
    {
    public:
        OverlayProfileSessionListener();
        virtual ~OverlayProfileSessionListener();

        /// @see ProfileSessionListener::initializeSession
        virtual void initializeSession();

        /// @see ProfileSessionListener::finializeSession
        virtual void finializeSession();

        /// @see ProfileSessionListener::displayResults
        virtual void displayResults(const ProfileInstance& instance, ulong maxTotalFrameTime);

        /// @see ProfileSessionListener::changeEnableState
        virtual void changeEnableState(bool enabled);

        /** Set the size of the profiler overlay, in pixels. */
        void setOverlayDimensions(Real width, Real height);

        /** Set the position of the profiler overlay, in pixels. */
        void setOverlayPosition(Real left, Real top);

        Real getOverlayWidth() const;
        Real getOverlayHeight() const;
        Real getOverlayLeft() const;
        Real getOverlayTop() const;

    private:
        typedef list<OverlayElement*>::type ProfileBarList;

        /** Prints the profiling results of each frame 
        @remarks Recursive, for all the little children. */
        void displayResults(ProfileInstance* instance, ProfileBarList::const_iterator& bIter, Real& maxTimeMillisecs, Real& newGuiHeight, int& profileCount);

        /** An internal function to create the container which will hold our display elements*/
        OverlayContainer* createContainer();

        /** An internal function to create a text area */
        OverlayElement* createTextArea(const String& name, Real width, Real height, Real top, Real left, 
                                    uint fontSize, const String& caption, bool show = true);

        /** An internal function to create a panel */
        OverlayElement* createPanel(const String& name, Real width, Real height, Real top, Real left, 
                                const String& materialName, bool show = true);

        /// Holds the display bars for each profile results
        ProfileBarList mProfileBars;

        /// The overlay which contains our profiler results display
        Overlay* mOverlay;

        /// The window that displays the profiler results
        OverlayContainer* mProfileGui;

        /// The height of each bar
        Real mBarHeight;

        /// The height of the stats window
        Real mGuiHeight;

        /// The width of the stats window
        Real mGuiWidth;

        /// The horz position of the stats window
        Real mGuiLeft;

        /// The vertical position of the stats window
        Real mGuiTop;

        /// The size of the indent for each profile display bar
        Real mBarIndent;

        /// The width of the border between the profile window and each bar
        Real mGuiBorderWidth;

        /// The width of the min, avg, and max lines in a profile display
        Real mBarLineWidth;

        /// The distance between bars
        Real mBarSpacing;

        /// The max number of profiles we can display
        uint mMaxDisplayProfiles;
    };
}
#endif
