/*
 * Copyright (c) 2004-2019 Julien Nadeau Carriere <vedge@csoft.net>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 * USE OF THIS SOFTWARE EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Point element.
 */

#include <agar/core/core.h>
#include <agar/gui/widget.h>
#include <agar/gui/primitive.h>
#include <agar/gui/numerical.h>
#include <agar/gui/iconmgr.h>
#include <agar/vg/vg.h>
#include <agar/vg/vg_view.h>
#include <agar/vg/icons.h>

VG_Point *
VG_PointNew(void *pNode, VG_Vector pos)
{
	VG_Point *vp;

	vp = (VG_Point *)AG_Malloc(sizeof(VG_Point));
	VG_NodeInit(vp, &vgPointOps);
	VG_Translate(vp, pos);
	VG_NodeAttach(pNode, vp);
	return (vp);
}

void
VG_PointSize(VG_Point *vp, double r)
{
	VG *vg = VGNODE(vp)->vg;

	AG_ObjectLock(vg);
	vp->size = r;
	AG_ObjectUnlock(vg);
}

static void
Init(void *_Nonnull obj)
{
	VG_Point *pt = obj;

	pt->size = 0.0;
}

static void
Draw(void *_Nonnull obj, VG_View *_Nonnull vv)
{
	VG_Point *pt = obj;
	double size, i;

	if (vv->flags & VG_VIEW_CONSTRUCTION) {
		size = 3.0;
	} else {
		size = pt->size;
	}
	if (size > 0.0f) {
		AG_Color c = VG_MapColorRGB(VGNODE(pt)->color);
		int x, y;

		VG_GetViewCoords(vv, VG_Pos(pt), &x, &y);
		AG_PutPixel(vv, x, y, &c);
		for (i = 0; i < size; i += 1.0f) {
			AG_PutPixel(vv, x-i, y, &c);
			AG_PutPixel(vv, x+i, y, &c);
			AG_PutPixel(vv, x, y-i, &c);
			AG_PutPixel(vv, x, y+i, &c);
		}
	}
}

static void
Extent(void *_Nonnull obj, VG_View *_Nonnull vv, VG_Vector *_Nonnull a,
    VG_Vector *_Nonnull b)
{
	VG_Point *pt = obj;
	VG_Vector pos = VG_Pos(pt);

	*a = pos;
	*b = pos;
}

static float
PointProximity(void *_Nonnull obj, VG_View *_Nonnull vv, VG_Vector *_Nonnull vPt)
{
	VG_Point *pt = obj;
	VG_Vector pos = VG_Pos(pt);
	float d;

	d = VG_Distance(pos, *vPt);
	*vPt = pos;
	return (d);
}

static void
Move(void *_Nonnull obj, VG_Vector vPos, VG_Vector vRel)
{
	VG_SetPosition(obj, vPos);
}

static void *_Nonnull
Edit(void *_Nonnull obj, VG_View *_Nonnull vv)
{
	VG_Point *vp = obj;
	AG_Box *box = AG_BoxNewVert(NULL, AG_BOX_EXPAND);

	AG_NumericalNewDbl(box, 0, NULL, _("Render size: "), &vp->size);
	return (box);
}

VG_NodeOps vgPointOps = {
	N_("Point"),
	&vgIconPoints,
	sizeof(VG_Point),
	Init,
	NULL,			/* destroy */
	NULL,			/* load */
	NULL,			/* save */
	Draw,
	Extent,
	PointProximity,
	NULL,			/* lineProximity */
	NULL,			/* deleteNode */
	Move,
	Edit
};