/*
 * $Id$
 *
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2008 Blender Foundation.
 * All rights reserved.
 *
 * 
 * Contributor(s): Blender Foundation
 *
 * ***** END GPL LICENSE BLOCK *****
 */

/** \file blender/editors/space_node/node_header.c
 *  \ingroup spnode
 */


#include <string.h>
#include <stdio.h>

#include "DNA_space_types.h"
#include "DNA_node_types.h"
#include "DNA_scene_types.h"
#include "DNA_screen_types.h"

#include "MEM_guardedalloc.h"

#include "BLI_blenlib.h"
#include "BLI_utildefines.h"

#include "BKE_context.h"
#include "BKE_screen.h"
#include "BKE_node.h"
#include "BKE_main.h"

#include "WM_api.h"
#include "WM_types.h"


#include "UI_interface.h"
#include "UI_resources.h"
#include "UI_interface_icons.h"
#include "UI_view2d.h"

#include "node_intern.h"

/* ************************ add menu *********************** */

static void do_node_add(bContext *C, void *UNUSED(arg), int event)
{
	SpaceNode *snode= CTX_wm_space_node(C);
	ScrArea *sa= CTX_wm_area(C);
	ARegion *ar;
	bNode *node;
	
	/* get location to add node at mouse */
	for(ar=sa->regionbase.first; ar; ar=ar->next) {
		if(ar->regiontype == RGN_TYPE_WINDOW) {
			wmWindow *win= CTX_wm_window(C);
			int x= win->eventstate->x - ar->winrct.xmin;
			int y= win->eventstate->y - ar->winrct.ymin;
			
			if(y < 60) y+= 60;
			UI_view2d_region_to_view(&ar->v2d, x, y, &snode->mx, &snode->my);
		}
	}
	
	/* store selection in temp test flag */
	for(node= snode->edittree->nodes.first; node; node= node->next) {
		if(node->flag & NODE_SELECT) node->flag |= NODE_TEST;
		else node->flag &= ~NODE_TEST;
	}
	
	node= node_add_node(snode, CTX_data_scene(C), event, snode->mx, snode->my);
	
	/* select previous selection before autoconnect */
	for(node= snode->edittree->nodes.first; node; node= node->next) {
		if(node->flag & NODE_TEST) node->flag |= NODE_SELECT;
	}
	
	snode_autoconnect(snode, 1, 0);
	
	/* deselect after autoconnection */
	for(node= snode->edittree->nodes.first; node; node= node->next) {
		if(node->flag & NODE_TEST) node->flag &= ~NODE_SELECT;
	}
		
	snode_notify(C, snode);
	snode_dag_update(C, snode);
}

static void node_auto_add_menu(bContext *C, uiLayout *layout, void *arg_nodeclass)
{
	Main *bmain= CTX_data_main(C);
	SpaceNode *snode= CTX_wm_space_node(C);
	bNodeTree *ntree;
	int nodeclass= GET_INT_FROM_POINTER(arg_nodeclass);
	int tot= 0, a;
	
	ntree = snode->nodetree;

	if(!ntree) {
		uiItemS(layout);
		return;
	}

	/* mostly taken from toolbox.c, node_add_sublevel() */
	if(nodeclass==NODE_CLASS_GROUP) {
		bNodeTree *ngroup= bmain->nodetree.first;
		for(; ngroup; ngroup= ngroup->id.next)
			if(ngroup->type==ntree->type)
				tot++;
	}
	else {
		bNodeType *type = ntree->alltypes.first;
		while(type) {
			if(type->nclass == nodeclass)
				tot++;
			type= type->next;
		}
	}	
	
	if(tot==0) {
		uiItemS(layout);
		return;
	}

	uiLayoutSetFunc(layout, do_node_add, NULL);
	
	if(nodeclass==NODE_CLASS_GROUP) {
		bNodeTree *ngroup= bmain->nodetree.first;

		for(tot=0, a=0; ngroup; ngroup= ngroup->id.next, tot++) {
			if(ngroup->type==ntree->type) {
				uiItemV(layout, ngroup->id.name+2, ICON_NONE, NODE_GROUP_MENU+tot);
				a++;
			}
		}
	}
	else {
		bNodeType *type;
		int script=0;

		for(a=0, type= ntree->alltypes.first; type; type=type->next) {
			if(type->nclass == nodeclass && type->name) {
				if(type->type == NODE_DYNAMIC) {
					uiItemV(layout, type->name, ICON_NONE, NODE_DYNAMIC_MENU+script);
					script++;
				}
				else
					uiItemV(layout, type->name, ICON_NONE, type->type);

				a++;
			}
		}
	}
}

static void node_menu_add(const bContext *C, Menu *menu)
{
	SpaceNode *snode= CTX_wm_space_node(C);
	uiLayout *layout= menu->layout;

	if(!snode->nodetree)
		uiLayoutSetActive(layout, 0);

	if(snode->treetype==NTREE_SHADER) {
		uiItemMenuF(layout, "Input", 0, node_auto_add_menu, SET_INT_IN_POINTER(NODE_CLASS_INPUT));
		uiItemMenuF(layout, "Output", 0, node_auto_add_menu, SET_INT_IN_POINTER(NODE_CLASS_OUTPUT));
		uiItemMenuF(layout, "Color", 0, node_auto_add_menu, SET_INT_IN_POINTER(NODE_CLASS_OP_COLOR));
		uiItemMenuF(layout, "Vector", 0, node_auto_add_menu, SET_INT_IN_POINTER(NODE_CLASS_OP_VECTOR));
		uiItemMenuF(layout, "Convertor", 0, node_auto_add_menu, SET_INT_IN_POINTER(NODE_CLASS_CONVERTOR));
		uiItemMenuF(layout, "Group", 0, node_auto_add_menu, SET_INT_IN_POINTER(NODE_CLASS_GROUP));
		uiItemMenuF(layout, "Dynamic", 0, node_auto_add_menu, SET_INT_IN_POINTER(NODE_CLASS_OP_DYNAMIC));
	}
	else if(snode->treetype==NTREE_COMPOSIT) {
		uiItemMenuF(layout, "Input", 0, node_auto_add_menu, SET_INT_IN_POINTER(NODE_CLASS_INPUT));
		uiItemMenuF(layout, "Output", 0, node_auto_add_menu, SET_INT_IN_POINTER(NODE_CLASS_OUTPUT));
		uiItemMenuF(layout, "Color", 0, node_auto_add_menu, SET_INT_IN_POINTER(NODE_CLASS_OP_COLOR));
		uiItemMenuF(layout, "Vector", 0, node_auto_add_menu, SET_INT_IN_POINTER(NODE_CLASS_OP_VECTOR));
		uiItemMenuF(layout, "Filter", 0, node_auto_add_menu, SET_INT_IN_POINTER(NODE_CLASS_OP_FILTER));
		uiItemMenuF(layout, "Convertor", 0, node_auto_add_menu, SET_INT_IN_POINTER(NODE_CLASS_CONVERTOR));
		uiItemMenuF(layout, "Matte", 0, node_auto_add_menu, SET_INT_IN_POINTER(NODE_CLASS_MATTE));
		uiItemMenuF(layout, "Distort", 0, node_auto_add_menu, SET_INT_IN_POINTER(NODE_CLASS_DISTORT));
		uiItemMenuF(layout, "Group", 0, node_auto_add_menu, SET_INT_IN_POINTER(NODE_CLASS_GROUP));
	}
	else if(snode->treetype==NTREE_TEXTURE) {
		uiItemMenuF(layout, "Input", 0, node_auto_add_menu, SET_INT_IN_POINTER(NODE_CLASS_INPUT));
		uiItemMenuF(layout, "Output", 0, node_auto_add_menu, SET_INT_IN_POINTER(NODE_CLASS_OUTPUT));
		uiItemMenuF(layout, "Color", 0, node_auto_add_menu, SET_INT_IN_POINTER(NODE_CLASS_OP_COLOR));
		uiItemMenuF(layout, "Patterns", 0, node_auto_add_menu, SET_INT_IN_POINTER(NODE_CLASS_PATTERN));
		uiItemMenuF(layout, "Textures", 0, node_auto_add_menu, SET_INT_IN_POINTER(NODE_CLASS_TEXTURE));
		uiItemMenuF(layout, "Convertor", 0, node_auto_add_menu, SET_INT_IN_POINTER(NODE_CLASS_CONVERTOR));
		uiItemMenuF(layout, "Distort", 0, node_auto_add_menu, SET_INT_IN_POINTER(NODE_CLASS_DISTORT));
		uiItemMenuF(layout, "Group", 0, node_auto_add_menu, SET_INT_IN_POINTER(NODE_CLASS_GROUP));
	}
}

void node_menus_register(void)
{
	MenuType *mt;

	mt= MEM_callocN(sizeof(MenuType), "spacetype node menu add");
	strcpy(mt->idname, "NODE_MT_add");
	strcpy(mt->label, "Add");
	mt->draw= node_menu_add;
	WM_menutype_add(mt);
}