// rendermd2.cpp: loader code adapted from a nehe tutorial

#include "cube.h"

#import "Command.h"
#import "MD2.h"
#import "MapModelInfo.h"
#import "OFString+Cube.h"
#import "Player.h"

static OFMutableDictionary<OFString *, MD2 *> *mdllookup = nil;
static OFMutableArray<MD2 *> *mapmodels = nil;

static const int FIRSTMDL = 20;

void
delayedload(MD2 *m)
{
	if (!m.loaded) {
		OFString *path = [OFString stringWithFormat:
		    @"packages/models/%@", m.loadname];
		OFIRI *baseIRI = [Cube.sharedInstance.gameDataIRI
		    IRIByAppendingPathComponent: path];

		OFIRI *IRI1 = [baseIRI
		    IRIByAppendingPathComponent: @"tris.md2"];
		if (![m loadWithIRI: IRI1])
			fatal(@"loadmodel: %@", IRI1.string);

		OFIRI *IRI2 = [baseIRI
		    IRIByAppendingPathComponent: @"skin.jpg"];
		int xs, ys;
		installtex(FIRSTMDL + m.mdlnum, IRI2, &xs, &ys, false);
		m.loaded = true;
	}
}

MD2 *
loadmodel(OFString *name)
{
	static int modelnum = 0;

	MD2 *m = mdllookup[name];
	if (m != nil)
		return m;

	m = [MD2 md2];
	m.mdlnum = modelnum++;
	m.mmi = [MapModelInfo infoWithRad: 2 h: 2 zoff: 0 snap: 0 name: @""];
	m.loadname = name;

	if (mdllookup == nil)
		mdllookup = [[OFMutableDictionary alloc] init];

	mdllookup[name] = m;

	return m;
}

COMMAND(mapmodel, ARG_5STR, ^ (OFString *rad, OFString *h, OFString *zoff,
    OFString *snap, OFString *name) {
	MD2 *m = loadmodel([name stringByReplacingOccurrencesOfString: @"\\"
							   withString: @"/"]);
	m.mmi = [MapModelInfo infoWithRad: rad.cube_intValue
					h: h.cube_intValue
				     zoff: zoff.cube_intValue
				     snap: snap.cube_intValue
				     name: m.loadname];

	if (mapmodels == nil)
		mapmodels = [[OFMutableArray alloc] init];

	[mapmodels addObject: m];
})

COMMAND(mapmodelreset, ARG_NONE, ^ {
	[mapmodels removeAllObjects];
})

MapModelInfo *
getmminfo(int i)
{
	return i < mapmodels.count ? mapmodels[i].mmi : nil;
}

void
rendermodel(OFString *mdl, int frame, int range, int tex, float rad,
    OFVector3D position, float yaw, float pitch, bool teammate, float scale,
    float speed, int snap, int basetime)
{
	MD2 *m = loadmodel(mdl);

	if (isoccluded(Player.player1.origin.x, Player.player1.origin.y,
	    position.x - rad, position.z - rad, rad * 2))
		return;

	delayedload(m);

	int xs, ys;
	glBindTexture(GL_TEXTURE_2D,
	    tex ? lookuptexture(tex, &xs, &ys) : FIRSTMDL + m.mdlnum);

	int ix = (int)position.x;
	int iy = (int)position.z;
	OFColor *light = OFColor.white;

	if (!OUTBORD(ix, iy)) {
		struct sqr *s = S(ix, iy);
		float ll = 256.0f; // 0.96f;
		float of = 0.0f;   // 0.1f;
		light = [OFColor colorWithRed: s->r / ll + of
					green: s->g / ll + of
					 blue: s->b / ll + of
					alpha: 1.0f];
	}

	if (teammate) {
		float red, green, blue;
		[light getRed: &red green: &green blue: &blue alpha: NULL];
		light = [OFColor colorWithRed: red * 0.6f
					green: green * 0.7f
					 blue: blue * 1.2f
					alpha: 1.0f];
	}

	[m renderWithLight: light
		     frame: frame
		     range: range
		  position: position
		       yaw: yaw
		     pitch: pitch
		     scale: scale
		     speed: speed
		      snap: snap
		  basetime: basetime];
}