/*
   Copyright (C) 2001-2006, William Joseph.
   All Rights Reserved.

   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
 */

#if !defined( INCLUDED_IPATCH_H )
#define INCLUDED_IPATCH_H

#include "globaldefs.h"
#include "debugging/debugging.h"
#include "generic/constant.h"
#include "generic/vector.h"

namespace scene
{
class Node;
}

template<typename Element>
class ArrayReference
{
std::size_t m_size;
Element* m_data;
public:
typedef Element value_type;
typedef value_type* iterator;
typedef const value_type* const_iterator;

ArrayReference()
	: m_size( 0 ), m_data( 0 ){
}
ArrayReference( std::size_t size, Element* data )
	: m_size( size ), m_data( data ){
}

iterator begin(){
	return m_data;
}
const_iterator begin() const {
	return m_data;
}
iterator end(){
	return m_data + m_size;
}
const_iterator end() const {
	return m_data + m_size;
}

value_type& operator[]( std::size_t index ){
#if GDEF_DEBUG
	ASSERT_MESSAGE( index < size(), "array index out of bounds" );
#endif
	return m_data[index];
}
const value_type& operator[]( std::size_t index ) const {
#if GDEF_DEBUG
	ASSERT_MESSAGE( index < size(), "array index out of bounds" );
#endif
	return m_data[index];
}
value_type* data(){
	return m_data;
}
const value_type* data() const {
	return m_data;
}
std::size_t size() const {
	return m_size;
}
bool empty() const {
	return m_size == 0;
}
};

#if 0
template<typename Element>
class MatrixIterator
{
Element* m_position;

void increment(){
	++m_position;
}

public:
typedef std::bidirectional_iterator_tag iterator_category;
typedef std::ptrdiff_t difference_type;
typedef difference_type distance_type;
typedef KeyValue<Key, Value> value_type;
typedef value_type* pointer;
typedef value_type& reference;

MatrixIterator( Element* position ) : m_position( position ){
}

Element* position(){
	return m_position;
}

bool operator==( const MatrixIterator& other ) const {
	return m_position == other.m_position;
}
bool operator!=( const MatrixIterator& other ) const {
	return !operator==( other );
}
MatrixIterator& operator++(){
	increment();
	return *this;
}
MatrixIterator operator++( int ){
	MatrixIterator tmp = *this;
	increment();
	return tmp;
}
value_type& operator*() const {
	return m_position->m_value;
}
value_type* operator->() const {
	return &( operator*() );
}
};
#endif

template<typename Element>
class Matrix
{
std::size_t m_x, m_y;
Element* m_data;
public:
typedef Element value_type;
typedef value_type* iterator;
typedef const value_type* const_iterator;

Matrix()
	: m_x( 0 ), m_y( 0 ), m_data( 0 ){
}
Matrix( std::size_t x, std::size_t y, Element* data )
	: m_x( x ), m_y( y ), m_data( data ){
}

iterator begin(){
	return m_data;
}
const_iterator begin() const {
	return m_data;
}
iterator end(){
	return m_data + size();
}
const_iterator end() const {
	return m_data + size();
}

value_type& operator[]( std::size_t index ){
#if GDEF_DEBUG
	ASSERT_MESSAGE( index < size(), "array index out of bounds" );
#endif
	return m_data[index];
}
const value_type& operator[]( std::size_t index ) const {
#if GDEF_DEBUG
	ASSERT_MESSAGE( index < size(), "array index out of bounds" );
#endif
	return m_data[index];
}
value_type& operator()( std::size_t x, std::size_t y ){
#if GDEF_DEBUG
	ASSERT_MESSAGE( x < m_x && y < m_y, "array index out of bounds" );
#endif
	return m_data[x * m_y + y];
}
const value_type& operator()( std::size_t x, std::size_t y ) const {
#if GDEF_DEBUG
	ASSERT_MESSAGE( x < m_x && y < m_y, "array index out of bounds" );
#endif
	return m_data[x * m_y + y];
}
value_type* data(){
	return m_data;
}
const value_type* data() const {
	return m_data;
}
std::size_t x() const {
	return m_x;
}
std::size_t y() const {
	return m_y;
}
std::size_t size() const {
	return m_x * m_y;
}
bool empty() const {
	return m_x == 0;
}
};

class PatchControl
{
public:
Vector3 m_vertex;
Vector2 m_texcoord;
};

typedef Matrix<PatchControl> PatchControlMatrix;


class PatchCreator
{
public:
INTEGER_CONSTANT( Version, 1 );
STRING_CONSTANT( Name, "patch" );
virtual scene::Node& createPatch() = 0;
virtual void Patch_undoSave( scene::Node& patch ) const = 0;
virtual void Patch_resize( scene::Node& patch, std::size_t width, std::size_t height ) const = 0;
virtual PatchControlMatrix Patch_getControlPoints( scene::Node& patch ) const = 0;
virtual void Patch_controlPointsChanged( scene::Node& patch ) const = 0;
virtual const char* Patch_getShader( scene::Node& patch ) const = 0;
virtual void Patch_setShader( scene::Node& patch, const char* shader ) const = 0;
};

#include "modulesystem.h"

template<typename Type>
class ModuleRef;
typedef ModuleRef<PatchCreator> PatchModuleRef;

template<typename Type>
class GlobalModule;
typedef GlobalModule<PatchCreator> GlobalPatchModule;

template<typename Type>
class GlobalModuleRef;
typedef GlobalModuleRef<PatchCreator> GlobalPatchModuleRef;

inline PatchCreator& GlobalPatchCreator(){
	return GlobalPatchModule::getTable();
}

#endif