/***************************************************************************
    copyright            : (C) 2003 by Michael Speck
    email                : http://lgames.sf.net
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef BFIELD_H
#define BFIELD_H

enum {
	BFIELD_DEMO = 0,
	BFIELD_GAME
};

typedef struct {
	SDL_Surface 	*img; 
	int		img_x_offset, img_y_offset; /* position of the living tree img_y_offset+h
						       is the position of the dead tree */
	int		x, y; /* battlefield position */
	int 		w, h;
	int		hx, hy;	/* hotspot for impacts */
	int		burn_time; /* if >0 tree is burning down thus when this
				      becomes 0 the tree is dead */
	int		dead; /* hits doesn't start burning */
} Tree;

typedef struct {
	Vector 	gun;			/* base point of gun */
	Vector  gun_img_offset;		/* offset added to base point to draw image */
	int	gun_dir;		/* 0 - 8 in 20° steps */
	int	img_gun_x_offset;	/* offset in gun image indicating the looking direction */
	Tree	trees[MAX_TREES];	/* living and burned down trees */
	int	tree_count;
	int	gun_delay;		/* while > 0 gun is reloaded */
	int	demo;			/* wether bfield_update fires gun automatically */
	int	demo_delay;		/* demo does not shoot all the time */
	int     demo_hunt_soldiers;	/* while >0 decrease and fire at soldiers when 0
					   decide 50-50 wether to fire at soldiers or tanks */
	int	delays[UT_LAST];	/* if any gets 0 this unit type enteres the playing field
					   and the delay is reset to the settings below */
	Range	delay_ranges[UT_LAST];	/* the time until next unit type will enter the battlefield */
	Range	group_sizes[UT_LAST];	/* number of units that will enter the battlefield */
} BField;

void bfield_init( int type, Vector *gun, Vector *gun_img_offset );

void bfield_finalize();

void bfield_draw( SDL_Surface *dest, int camera_x, int camera_y );

void bfield_update( int ms );

int bfield_gun_is_ready();

void bfield_fire_gun( int type /* ST_... */, Vector *dest, double alpha, double power );

void bfield_reload_gun();

void bfield_handle_impact( Shot *shot );

void bfield_update_gun_dir( int mx, int my );

#endif