//
// ZoneMinder Zone Class Interfaces, $Date$, $Revision$
// Copyright (C) 2001-2008 Philip Coombes
// 
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
// 

#ifndef ZM_ZONE_H
#define ZM_ZONE_H

#include "zm_rgb.h"
#include "zm_coord.h"
#include "zm_poly.h"
#include "zm_image.h"
#include "zm_event.h"

class Monitor;

//
// This describes a 'zone', or an area of an image that has certain
// detection characteristics.
//
class Zone
{
protected:
	struct Range
	{
		int lo_x;
		int hi_x;
		int off_x;
	};

public:
	typedef enum { ACTIVE=1, INCLUSIVE, EXCLUSIVE, PRECLUSIVE, INACTIVE } ZoneType;
	typedef enum { ALARMED_PIXELS=1, FILTERED_PIXELS, BLOBS } CheckMethod;

protected:
	// Inputs
	Monitor			*monitor;

	int				id;
	char			*label;
	ZoneType		type;
	Polygon			polygon;
	Rgb				alarm_rgb;
	CheckMethod		check_method;

	int				min_pixel_threshold;
	int				max_pixel_threshold;

	int				min_alarm_pixels;
	int				max_alarm_pixels;

	Coord			filter_box;
	int				min_filter_pixels;
	int				max_filter_pixels;

	int				min_blob_pixels;
	int				max_blob_pixels;
	int				min_blobs;
	int				max_blobs;

    int             overload_frames;

	// Outputs/Statistics
	bool			alarmed;
	int				pixel_diff;
	unsigned int			alarm_pixels;
	int				alarm_filter_pixels;
	int				alarm_blob_pixels;
	int				alarm_blobs;
	int				min_blob_size;
	int				max_blob_size;
	Box				alarm_box;
	Coord			alarm_centre;
	unsigned int	score;
	Image			*pg_image;
	Range			*ranges;
	Image			*image;

    int             overload_count;

protected:
	void Setup( Monitor *p_monitor, int p_id, const char *p_label, ZoneType p_type, const Polygon &p_polygon, const Rgb p_alarm_rgb, CheckMethod p_check_method, int p_min_pixel_threshold, int p_max_pixel_threshold, int p_min_alarm_pixels, int p_max_alarm_pixels, const Coord &p_filter_box, int p_min_filter_pixels, int p_max_filter_pixels, int p_min_blob_pixels, int p_max_blob_pixels, int p_min_blobs, int p_max_blobs, int p_overload_frames );
	void std_alarmedpixels(Image* pdiff_image, const Image* ppoly_image, unsigned int* pixel_count, unsigned int* pixel_sum);
	
public:
	Zone( Monitor *p_monitor, int p_id, const char *p_label, ZoneType p_type, const Polygon &p_polygon, const Rgb p_alarm_rgb, CheckMethod p_check_method, int p_min_pixel_threshold=15, int p_max_pixel_threshold=0, int p_min_alarm_pixels=50, int p_max_alarm_pixels=75000, const Coord &p_filter_box=Coord( 3, 3 ), int p_min_filter_pixels=50, int p_max_filter_pixels=50000, int p_min_blob_pixels=10, int p_max_blob_pixels=0, int p_min_blobs=0, int p_max_blobs=0, int p_overload_frames=0 )
	{
		Setup( p_monitor, p_id, p_label, p_type, p_polygon, p_alarm_rgb, p_check_method, p_min_pixel_threshold, p_max_pixel_threshold, p_min_alarm_pixels, p_max_alarm_pixels, p_filter_box, p_min_filter_pixels, p_max_filter_pixels, p_min_blob_pixels, p_max_blob_pixels, p_min_blobs, p_max_blobs, p_overload_frames );
	}
	Zone( Monitor *p_monitor, int p_id, const char *p_label, const Polygon &p_polygon, const Rgb p_alarm_rgb, CheckMethod p_check_method, int p_min_pixel_threshold=15, int p_max_pixel_threshold=0, int p_min_alarm_pixels=50, int p_max_alarm_pixels=75000, const Coord &p_filter_box=Coord( 3, 3 ), int p_min_filter_pixels=50, int p_max_filter_pixels=50000, int p_min_blob_pixels=10, int p_max_blob_pixels=0, int p_min_blobs=0, int p_max_blobs=0, int p_overload_frames=0 )
	{
		Setup( p_monitor, p_id, p_label, Zone::ACTIVE, p_polygon, p_alarm_rgb, p_check_method, p_min_pixel_threshold, p_max_pixel_threshold, p_min_alarm_pixels, p_max_alarm_pixels, p_filter_box, p_min_filter_pixels, p_max_filter_pixels, p_min_blob_pixels, p_max_blob_pixels, p_min_blobs, p_max_blobs, p_overload_frames );
	}
	Zone( Monitor *p_monitor, int p_id, const char *p_label, const Polygon &p_polygon )
	{
		Setup( p_monitor, p_id, p_label, Zone::INACTIVE, p_polygon, RGB_BLACK, (Zone::CheckMethod)0, 0, 0, 0, 0, Coord( 0, 0 ), 0, 0, 0, 0, 0, 0, 0 );
	}

public:
	~Zone();

	inline int Id() const { return( id ); }
	inline const char *Label() const { return( label ); }
	inline ZoneType Type() const { return( type ); }
	inline bool IsActive() const { return( type == ACTIVE ); }
	inline bool IsInclusive() const { return( type == INCLUSIVE ); }
	inline bool IsExclusive() const { return( type == EXCLUSIVE ); }
	inline bool IsPreclusive() const { return( type == PRECLUSIVE ); }
	inline bool IsInactive() const { return( type == INACTIVE ); }
	inline const Image *AlarmImage() const { return( image ); }
	inline const Polygon &GetPolygon() const { return( polygon ); }
	inline bool Alarmed() const { return( alarmed ); }
	inline void SetAlarm() { alarmed = true; }
	inline void ClearAlarm() { alarmed = false; }
	inline Coord GetAlarmCentre() const { return( alarm_centre ); }
	inline unsigned int Score() const { return( score ); }

	inline void ResetStats()
	{
		alarmed = false;
		pixel_diff = 0;
		alarm_pixels = 0;
		alarm_filter_pixels = 0;
		alarm_blob_pixels = 0;
		alarm_blobs = 0;
		min_blob_size = 0;
		max_blob_size = 0;
		score = 0;
	}
	void RecordStats( const Event *event );
	bool CheckAlarms( const Image *delta_image );
	bool DumpSettings( char *output, bool verbose );

	static bool ParsePolygonString( const char *polygon_string, Polygon &polygon );
	static bool ParseZoneString( const char *zone_string, int &zone_id, int &colour, Polygon &polygon );
	static int Load( Monitor *monitor, Zone **&zones );
};

#endif // ZM_ZONE_H
