/*
Copyright (C) 1999-2007 id Software, Inc. and contributors.
For a list of contributors, see the accompanying CONTRIBUTORS file.

This file is part of GtkRadiant.

GtkRadiant 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.

GtkRadiant 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 GtkRadiant; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/
// csg4.c

#include "qbsp.h"

extern	float subdivide_size;

char		source[1024];
char		name[1024];

vec_t		microvolume = 1.0;
qboolean	noprune;
qboolean	glview;
qboolean	nodetail;
qboolean	fulldetail;
qboolean	onlyents;
qboolean	nomerge;
qboolean	nowater;
qboolean	nofill;
qboolean	nocsg;
qboolean	noweld;
qboolean	noshare;
qboolean	nosubdiv;
qboolean	notjunc;
qboolean	noopt;
qboolean	leaktest;
qboolean	verboseentities;

char		outbase[32];

int			block_xl = -8, block_xh = 7, block_yl = -8, block_yh = 7;

int			entity_num;


node_t		*block_nodes[10][10];


/*
============
BlockTree

============
*/
node_t	*BlockTree (int xl, int yl, int xh, int yh)
{
	node_t	*node;
	vec3_t	normal;
	float	dist;
	int		mid;

	if (xl == xh && yl == yh)
	{
		node = block_nodes[xl+5][yl+5];
		if (!node)
		{	// return an empty leaf
			node = AllocNode ();
			node->planenum = PLANENUM_LEAF;
			node->contents = 0; //CONTENTS_SOLID;
			return node;
		}
		return node;
	}

	// create a seperator along the largest axis
	node = AllocNode ();

	if (xh - xl > yh - yl)
	{	// split x axis
		mid = xl + (xh-xl)/2 + 1;
		normal[0] = 1;
		normal[1] = 0;
		normal[2] = 0;
		dist = mid*1024;
		node->planenum = FindFloatPlane (normal, dist);
		node->children[0] = BlockTree ( mid, yl, xh, yh);
		node->children[1] = BlockTree ( xl, yl, mid-1, yh);
	}
	else
	{
		mid = yl + (yh-yl)/2 + 1;
		normal[0] = 0;
		normal[1] = 1;
		normal[2] = 0;
		dist = mid*1024;
		node->planenum = FindFloatPlane (normal, dist);
		node->children[0] = BlockTree ( xl, mid, xh, yh);
		node->children[1] = BlockTree ( xl, yl, xh, mid-1);
	}

	return node;
}

/*
============
ProcessBlock_Thread

============
*/
int			brush_start, brush_end;
void ProcessBlock_Thread (int blocknum)
{
	int		xblock, yblock;
	vec3_t		mins, maxs;
	bspbrush_t	*brushes;
	tree_t		*tree;
	node_t		*node;

	yblock = block_yl + blocknum / (block_xh-block_xl+1);
	xblock = block_xl + blocknum % (block_xh-block_xl+1);

	Sys_FPrintf( SYS_VRB, "############### block %2i,%2i ###############\n", xblock, yblock);

	mins[0] = xblock*1024;
	mins[1] = yblock*1024;
	mins[2] = -4096;
	maxs[0] = (xblock+1)*1024;
	maxs[1] = (yblock+1)*1024;
	maxs[2] = 4096;

	// the makelist and chopbrushes could be cached between the passes...
	brushes = MakeBspBrushList (brush_start, brush_end, mins, maxs);
	if (!brushes)
	{
		node = AllocNode ();
		node->planenum = PLANENUM_LEAF;
		node->contents = CONTENTS_SOLID;
		block_nodes[xblock+5][yblock+5] = node;
		return;
	}

	if (!nocsg)
		brushes = ChopBrushes (brushes);

	tree = BrushBSP (brushes, mins, maxs);

	block_nodes[xblock+5][yblock+5] = tree->headnode;
}

/*
============
ProcessWorldModel

============
*/
void ProcessWorldModel (void)
{
	entity_t	*e;
	tree_t		*tree;
	qboolean	leaked;
	qboolean	optimize;
 	xmlNodePtr	polyline, leaknode;
  char		level[ 2 ];

	e = &entities[entity_num];

	brush_start = e->firstbrush;
	brush_end = brush_start + e->numbrushes;
	leaked = false;

	//
	// perform per-block operations
	//
	if (block_xh * 1024 > map_maxs[0])
		block_xh = floor(map_maxs[0]/1024.0);
	if ( (block_xl+1) * 1024 < map_mins[0])
		block_xl = floor(map_mins[0]/1024.0);
	if (block_yh * 1024 > map_maxs[1])
		block_yh = floor(map_maxs[1]/1024.0);
	if ( (block_yl+1) * 1024 < map_mins[1])
		block_yl = floor(map_mins[1]/1024.0);

	if (block_xl <-4)
		block_xl = -4;
	if (block_yl <-4)
		block_yl = -4;
	if (block_xh > 3)
		block_xh = 3;
	if (block_yh > 3)
		block_yh = 3;

	for (optimize = false ; optimize <= true ; optimize++)
	{
		Sys_FPrintf( SYS_VRB, "--------------------------------------------\n");

		RunThreadsOnIndividual ((block_xh-block_xl+1)*(block_yh-block_yl+1),
			!verbose, ProcessBlock_Thread);

		//
		// build the division tree
		// oversizing the blocks guarantees that all the boundaries
		// will also get nodes.
		//

		Sys_FPrintf( SYS_VRB, "--------------------------------------------\n");

		tree = AllocTree ();
		tree->headnode = BlockTree (block_xl-1, block_yl-1, block_xh+1, block_yh+1);

		tree->mins[0] = (block_xl)*1024;
		tree->mins[1] = (block_yl)*1024;
		tree->mins[2] = map_mins[2] - 8;

		tree->maxs[0] = (block_xh+1)*1024;
		tree->maxs[1] = (block_yh+1)*1024;
		tree->maxs[2] = map_maxs[2] + 8;

		//
		// perform the global operations
		//
		MakeTreePortals (tree);

		if (FloodEntities (tree))
			FillOutside (tree->headnode);
		else
		{

      Sys_FPrintf( SYS_NOXML, "**********************\n" );
		Sys_FPrintf( SYS_NOXML, "******* leaked *******\n" );
		Sys_FPrintf( SYS_NOXML, "**********************\n" );
		polyline = LeakFile( tree );
		leaknode = xmlNewNode( NULL, "message" );
		xmlNodeSetContent( leaknode, "MAP LEAKED\n" );
		xmlAddChild( leaknode, polyline );
		level[0] = (int) '0' + SYS_ERR;
		level[1] = 0;
		xmlSetProp( leaknode, "level", (char*) &level );
		xml_SendNode( leaknode );
		if( leaktest )
		{
			Sys_Printf ("--- MAP LEAKED, ABORTING LEAKTEST ---\n");
			exit( 0 );
		}
		leaked = true;
/*
			Sys_Printf ("**** leaked ****\n");
			leaked = true;
			LeakFile (tree);
			if (leaktest)
			{
				Sys_Printf ("--- MAP LEAKED ---\n");
				exit (0);
			} */
		}

		MarkVisibleSides (tree, brush_start, brush_end);
		if (noopt || leaked)
			break;
		if (!optimize)
		{
			FreeTree (tree);
		}
	}

	FloodAreas (tree);
	if (glview)
		WriteGLView (tree, source);
	MakeFaces (tree->headnode);
	FixTjuncs (tree->headnode);

	if (!noprune)
		PruneNodes (tree->headnode);

	WriteBSP (tree->headnode);

	if (!leaked)
		WritePortalFile (tree);

	FreeTree (tree);
}

/*
============
ProcessSubModel

============
*/
void ProcessSubModel (void)
{
	entity_t	*e;
	int			start, end;
	tree_t		*tree;
	bspbrush_t	*list;
	vec3_t		mins, maxs;

	e = &entities[entity_num];

	start = e->firstbrush;
	end = start + e->numbrushes;

	mins[0] = mins[1] = mins[2] = -4096;
	maxs[0] = maxs[1] = maxs[2] = 4096;
	list = MakeBspBrushList (start, end, mins, maxs);
	if (!nocsg)
		list = ChopBrushes (list);
	tree = BrushBSP (list, mins, maxs);
	MakeTreePortals (tree);
	MarkVisibleSides (tree, start, end);
	MakeFaces (tree->headnode);
	FixTjuncs (tree->headnode);
	WriteBSP (tree->headnode);
	FreeTree (tree);
}

/*
============
ProcessModels
============
*/
void ProcessModels (void)
{
	BeginBSPFile ();

	for (entity_num=0 ; entity_num< num_entities ; entity_num++)
	{
		if (!entities[entity_num].numbrushes)
			continue;

		Sys_FPrintf( SYS_VRB, "############### model %i ###############\n", nummodels);
		BeginModel ();
		if (entity_num == 0)
			ProcessWorldModel ();
		else
			ProcessSubModel ();
		EndModel ();

		//if (!verboseentities)
		//	verbose = false;	// don't bother printing submodels
	}

	EndBSPFile ();
}


/*
============
main
============
*/
int BSP_Main ()
{
	double		start, end;
	char		path[1024];
	int		total_bsp_time;

	Sys_Printf ("\n----- BSP ----\n\n");

	
	start = I_FloatTime ();

	ThreadSetDefault ();
	SetQdirFromPath (mapname);

	strcpy (source, ExpandArg (mapname));
	StripExtension (source);

	// delete portal and line files
	sprintf (path, "%s.prt", source);
	remove (path);
	sprintf (path, "%s.lin", source);
	remove (path);

	strcpy (name, ExpandArg (mapname));	
	DefaultExtension (name, ".map");	// might be .reg

	//
	// if onlyents, just grab the entites and resave
	//
	if (onlyents)
	{
		char out[1024];

		sprintf (out, "%s.bsp", source);
		LoadBSPFile (out);
		num_entities = 0;

		LoadMapFile (name);
		SetModelNumbers ();
		SetLightStyles ();

		UnparseEntities ();

		WriteBSPFile (out);
	}
	else
	{
		//
		// start from scratch
		//
		LoadMapFile (name);
		SetModelNumbers ();
		SetLightStyles ();

		ProcessModels ();
	}

	end = I_FloatTime ();
	total_bsp_time = (int) (end-start);
	Sys_Printf("\nBSP Time: ");
	if ( total_bsp_time > 59 )
		Sys_Printf("%d Minutes ", total_bsp_time/60 );
	Sys_Printf( "%d Seconds\n", total_bsp_time%60 );


	return 0;
}