/*
 * $Id$
 *
 * ***** 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.
 *
 * Contributor(s): Chingiz Dyussenov, Arystanbek Dyussenov.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

/** \file blender/collada/collada_internal.cpp
 *  \ingroup collada
 */


/* COLLADABU_ASSERT, may be able to remove later */
#include "COLLADABUPlatform.h"

#include "collada_internal.h"

UnitConverter::UnitConverter() : unit(), up_axis(COLLADAFW::FileInfo::Z_UP) {}

void UnitConverter::read_asset(const COLLADAFW::FileInfo* asset)
{
	unit = asset->getUnit();
	up_axis = asset->getUpAxisType();
}

UnitConverter::UnitSystem UnitConverter::isMetricSystem()
{
	switch(unit.getLinearUnitUnit()) {
		case COLLADAFW::FileInfo::Unit::MILLIMETER:
		case COLLADAFW::FileInfo::Unit::CENTIMETER:
		case COLLADAFW::FileInfo::Unit::DECIMETER:
		case COLLADAFW::FileInfo::Unit::METER:
		case COLLADAFW::FileInfo::Unit::KILOMETER:
			return UnitConverter::Metric;
		case COLLADAFW::FileInfo::Unit::INCH:
		case COLLADAFW::FileInfo::Unit::FOOT:
		case COLLADAFW::FileInfo::Unit::YARD:
			return UnitConverter::Imperial;
		default:
			return UnitConverter::None;
	}
}

float UnitConverter::getLinearMeter()
{
	return (float)unit.getLinearUnitMeter();
}

void UnitConverter::convertVector3(COLLADABU::Math::Vector3 &vec, float *v)
{
	v[0] = vec.x;
	v[1] = vec.y;
	v[2] = vec.z;
}

// TODO need also for angle conversion, time conversion...

void UnitConverter::dae_matrix_to_mat4_(float out[][4], const COLLADABU::Math::Matrix4& in)
{
	// in DAE, matrices use columns vectors, (see comments in COLLADABUMathMatrix4.h)
	// so here, to make a blender matrix, we swap columns and rows
	for (int i = 0; i < 4; i++) {
		for (int j = 0; j < 4; j++) {
			out[i][j] = in[j][i];
		}
	}
}

void UnitConverter::mat4_to_dae(float out[][4], float in[][4])
{
	copy_m4_m4(out, in);
	transpose_m4(out);
}

void UnitConverter::mat4_to_dae_double(double out[][4], float in[][4])
{
	float mat[4][4];

	mat4_to_dae(mat, in);

	for (int i = 0; i < 4; i++)
		for (int j = 0; j < 4; j++)
			out[i][j] = mat[i][j];
}

void TransformBase::decompose(float mat[][4], float *loc, float eul[3], float quat[4], float *size)
{
	mat4_to_size(size, mat);
	if (eul) {
		mat4_to_eul(eul, mat);
	}
	if (quat) {
		mat4_to_quat(quat, mat);
	}
	copy_v3_v3(loc, mat[3]);
}

/**
Translation map.
Used to translate every COLLADA id to a valid id, no matter what "wrong" letters may be
included. Look at the IDREF XSD declaration for more.
Follows strictly the COLLADA XSD declaration which explicitly allows non-english chars,
like special chars (e.g. micro sign), umlauts and so on.
The COLLADA spec also allows additional chars for member access ('.'), these
must obviously be removed too, otherwise they would be heavily misinterpreted.
*/
const unsigned char translate_start_name_map[256] = {
95,  95,  95,  95,  95,  95,  95,  95,  95,
95,  95,  95,  95,  95,  95,  95,  95,
95,  95,  95,  95,  95,  95,  95,  95,
95,  95,  95,  95,  95,  95,  95,  95,
95,  95,  95,  95,  95,  95,  95,  95,
95,  95,  95,  95,  95,  95,  95,  95,
95,  95,  95,  95,  95,  95,  95,  95,
95,  95,  95,  95,  95,  95,  95,  95,
65,  66,  67,  68,  69,  70,  71,  72,
73,  74,  75,  76,  77,  78,  79,  80,
81,  82,  83,  84,  85,  86,  87,  88,
89,  90,  95,  95,  95,  95,  95,  95,
97,  98,  99,  100,  101,  102,  103,  104,
105,  106,  107,  108,  109,  110,  111,  112,
113,  114,  115,  116,  117,  118,  119,  120,
121,  122,  95,  95,  95,  95,  95,  95,
95,  95,  95,  95,  95,  95,  95,  95,
95,  95,  95,  95,  95,  95,  95,  95,
95,  95,  95,  95,  95,  95,  95,  95,
95,  95,  95,  95,  95,  95,  95,  95,
95,  95,  95,  95,  95,  95,  95,  95,
95,  95,  95,  95,  95,  95,  95,  95,
95,  95,  95,  95,  95,  95,  95,  95,
95,  95,  95,  95,  95,  95,  95,  192,
193,  194,  195,  196,  197,  198,  199,  200,
201,  202,  203,  204,  205,  206,  207,  208,
209,  210,  211,  212,  213,  214,  95,  216,
217,  218,  219,  220,  221,  222,  223,  224,
225,  226,  227,  228,  229,  230,  231,  232,
233,  234,  235,  236,  237,  238,  239,  240,
241,  242,  243,  244,  245,  246,  95,  248,
249,  250,  251,  252,  253,  254,  255};

const unsigned char translate_name_map[256] = {
95,  95,  95,  95,  95,  95,  95,  95,  95,
95,  95,  95,  95,  95,  95,  95,  95,
95,  95,  95,  95,  95,  95,  95,  95,
95,  95,  95,  95,  95,  95,  95,  95,
95,  95,  95,  95,  95,  95,  95,  95,
95,  95,  95,  95,  45,  95,  95,  48,
49,  50,  51,  52,  53,  54,  55,  56,
57,  95,  95,  95,  95,  95,  95,  95,
65,  66,  67,  68,  69,  70,  71,  72,
73,  74,  75,  76,  77,  78,  79,  80,
81,  82,  83,  84,  85,  86,  87,  88,
89,  90,  95,  95,  95,  95,  95,  95,
97,  98,  99,  100,  101,  102,  103,  104,
105,  106,  107,  108,  109,  110,  111,  112,
113,  114,  115,  116,  117,  118,  119,  120,
121,  122,  95,  95,  95,  95,  95,  95,
95,  95,  95,  95,  95,  95,  95,  95,
95,  95,  95,  95,  95,  95,  95,  95,
95,  95,  95,  95,  95,  95,  95,  95,
95,  95,  95,  95,  95,  95,  95,  95,
95,  95,  95,  95,  95,  95,  95,  95,
95,  95,  95,  95,  95,  95,  95,  95,
95,  95,  95,  95,  95,  95,  183,  95,
95,  95,  95,  95,  95,  95,  95,  192,
193,  194,  195,  196,  197,  198,  199,  200,
201,  202,  203,  204,  205,  206,  207,  208,
209,  210,  211,  212,  213,  214,  95,  216,
217,  218,  219,  220,  221,  222,  223,  224,
225,  226,  227,  228,  229,  230,  231,  232,
233,  234,  235,  236,  237,  238,  239,  240,
241,  242,  243,  244,  245,  246,  95,  248,
249,  250,  251,  252,  253,  254,  255};

typedef std::map< std::string, std::vector<std::string> > map_string_list;
map_string_list global_id_map;

void clear_global_id_map()
{
	global_id_map.clear();
}

/** Look at documentation of translate_map */
std::string translate_id(const std::string &id)
{
	if (id.size() == 0)
	{ return id; }
	std::string id_translated = id;
	id_translated[0] = translate_start_name_map[(unsigned int)id_translated[0]];
	for (unsigned int i=1; i < id_translated.size(); i++)
	{
		id_translated[i] = translate_name_map[(unsigned int)id_translated[i]];
	}
	// It's so much workload now, the if() should speed up things.
	if (id_translated != id)
	{
		// Search duplicates
		map_string_list::iterator iter = global_id_map.find(id_translated);
		if (iter != global_id_map.end())
		{
			unsigned int i = 0;
			bool found = false;
			for (i=0; i < iter->second.size(); i++)
			{
				if (id == iter->second[i])
				{ 
					found = true;
					break;
				}
			}
			bool convert = false;
			if (found)
			{
			  if (i > 0)
			  { convert = true; }
			}
			else
			{ 
				convert = true;
				global_id_map[id_translated].push_back(id);
			}
			if (convert)
			{
				std::stringstream out;
				out << ++i;
				id_translated += out.str();
			}
		}
		else { global_id_map[id_translated].push_back(id); }
	}
	return id_translated;
}

std::string id_name(void *id)
{
	return ((ID*)id)->name + 2;
}

std::string get_geometry_id(Object *ob)
{
	return translate_id(id_name(ob->data)) + "-mesh";
}

std::string get_light_id(Object *ob)
{
	return translate_id(id_name(ob)) + "-light";
}

std::string get_joint_id(Bone *bone, Object *ob_arm)
{
	return translate_id(/*id_name(ob_arm) + "_" +*/ bone->name);
}

std::string get_camera_id(Object *ob)
{
	return translate_id(id_name(ob)) + "-camera";
}

std::string get_material_id(Material *mat)
{
	return translate_id(id_name(mat)) + "-material";
}

bool has_object_type(Scene *sce, short obtype)
{
	Base *base= (Base*) sce->base.first;
	while(base) {
		Object *ob = base->object;
			
		if (ob->type == obtype && ob->data) {
			return true;
		}
		base= base->next;
	}
	return false;
}
