/*
   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
 */

///\file
///\brief Represents any entity which has a fixed size specified in its entity-definition and displays a model (e.g. ammo_bfg).
///
/// This entity displays the model specified in its entity-definition.
/// The "origin" and "angle" keys directly control the entity's local-to-parent transform.
/// The "rotation" key directly controls the entity's local-to-parent transform for Doom3 only.

#include "eclassmodel.h"

#include "cullable.h"
#include "renderable.h"
#include "editable.h"

#include "selectionlib.h"
#include "instancelib.h"
#include "transformlib.h"
#include "traverselib.h"
#include "entitylib.h"
#include "render.h"
#include "eclasslib.h"
#include "pivot.h"

#include "targetable.h"
#include "origin.h"
#include "angle.h"
#include "rotation.h"
#include "model.h"
#include "filters.h"
#include "namedentity.h"
#include "keyobservers.h"
#include "namekeys.h"
#include "modelskinkey.h"

#include "entity.h"

class EclassModel :
	public Snappable
{
MatrixTransform m_transform;
EntityKeyValues m_entity;
KeyObserverMap m_keyObservers;

OriginKey m_originKey;
Vector3 m_origin;
AngleKey m_angleKey;
float m_angle;
RotationKey m_rotationKey;
Float9 m_rotation;
SingletonModel m_model;

ClassnameFilter m_filter;
NamedEntity m_named;
NameKeys m_nameKeys;
RenderablePivot m_renderOrigin;
RenderableNamedEntity m_renderName;
ModelSkinKey m_skin;

Callback<void()> m_transformChanged;
Callback<void()> m_evaluateTransform;

void construct(){
	default_rotation( m_rotation );

	m_keyObservers.insert( "classname", ClassnameFilter::ClassnameChangedCaller( m_filter ) );
	m_keyObservers.insert( Static<KeyIsName>::instance().m_nameKey, NamedEntity::IdentifierChangedCaller( m_named ) );
	if ( g_gameType == eGameTypeDoom3 ) {
		m_keyObservers.insert( "angle", RotationKey::AngleChangedCaller( m_rotationKey ) );
		m_keyObservers.insert( "rotation", RotationKey::RotationChangedCaller( m_rotationKey ) );
	}
	else
	{
		m_keyObservers.insert( "angle", AngleKey::AngleChangedCaller( m_angleKey ) );
	}
	m_keyObservers.insert( "origin", OriginKey::OriginChangedCaller( m_originKey ) );
}

// vc 2k5 compiler fix
#if _MSC_VER >= 1400
public:
#endif

void updateTransform(){
	m_transform.localToParent() = g_matrix4_identity;
	matrix4_translate_by_vec3( m_transform.localToParent(), m_origin );

	if ( g_gameType == eGameTypeDoom3 ) {
		matrix4_multiply_by_matrix4( m_transform.localToParent(), rotation_toMatrix( m_rotation ) );
	}
	else
	{
		matrix4_multiply_by_matrix4( m_transform.localToParent(), matrix4_rotation_for_z_degrees( m_angle ) );
	}

	m_transformChanged();
}
typedef MemberCaller<EclassModel, void(), &EclassModel::updateTransform> UpdateTransformCaller;

void originChanged(){
	m_origin = m_originKey.m_origin;
	updateTransform();
}
typedef MemberCaller<EclassModel, void(), &EclassModel::originChanged> OriginChangedCaller;
void angleChanged(){
	m_angle = m_angleKey.m_angle;
	updateTransform();
}
typedef MemberCaller<EclassModel, void(), &EclassModel::angleChanged> AngleChangedCaller;
void rotationChanged(){
	rotation_assign( m_rotation, m_rotationKey.m_rotation );
	updateTransform();
}
typedef MemberCaller<EclassModel, void(), &EclassModel::rotationChanged> RotationChangedCaller;

void skinChanged(){
	scene::Node* node = m_model.getNode();
	if ( node != 0 ) {
		Node_modelSkinChanged( *node );
	}
}
typedef MemberCaller<EclassModel, void(), &EclassModel::skinChanged> SkinChangedCaller;

public:

EclassModel( EntityClass* eclass, scene::Node& node, const Callback<void()>& transformChanged, const Callback<void()>& evaluateTransform ) :
	m_entity( eclass ),
	m_originKey( OriginChangedCaller( *this ) ),
	m_origin( ORIGINKEY_IDENTITY ),
	m_angleKey( AngleChangedCaller( *this ) ),
	m_angle( ANGLEKEY_IDENTITY ),
	m_rotationKey( RotationChangedCaller( *this ) ),
	m_filter( m_entity, node ),
	m_named( m_entity ),
	m_nameKeys( m_entity ),
	m_renderName( m_named, g_vector3_identity ),
	m_skin( SkinChangedCaller( *this ) ),
	m_transformChanged( transformChanged ),
	m_evaluateTransform( evaluateTransform ){
	construct();
}
EclassModel( const EclassModel& other, scene::Node& node, const Callback<void()>& transformChanged, const Callback<void()>& evaluateTransform ) :
	m_entity( other.m_entity ),
	m_originKey( OriginChangedCaller( *this ) ),
	m_origin( ORIGINKEY_IDENTITY ),
	m_angleKey( AngleChangedCaller( *this ) ),
	m_angle( ANGLEKEY_IDENTITY ),
	m_rotationKey( RotationChangedCaller( *this ) ),
	m_filter( m_entity, node ),
	m_named( m_entity ),
	m_nameKeys( m_entity ),
	m_renderName( m_named, g_vector3_identity ),
	m_skin( SkinChangedCaller( *this ) ),
	m_transformChanged( transformChanged ),
	m_evaluateTransform( evaluateTransform ){
	construct();
}

InstanceCounter m_instanceCounter;
void instanceAttach( const scene::Path& path ){
	if ( ++m_instanceCounter.m_count == 1 ) {
		m_filter.instanceAttach();
		m_entity.instanceAttach( path_find_mapfile( path.begin(), path.end() ) );
		m_entity.attach( m_keyObservers );
		m_model.modelChanged( m_entity.getEntityClass().modelpath() );
		m_skin.skinChanged( m_entity.getEntityClass().skin() );
	}
}
void instanceDetach( const scene::Path& path ){
	if ( --m_instanceCounter.m_count == 0 ) {
		m_skin.skinChanged( "" );
		m_model.modelChanged( "" );
		m_entity.detach( m_keyObservers );
		m_entity.instanceDetach( path_find_mapfile( path.begin(), path.end() ) );
		m_filter.instanceDetach();
	}
}

EntityKeyValues& getEntity(){
	return m_entity;
}
const EntityKeyValues& getEntity() const {
	return m_entity;
}

scene::Traversable& getTraversable(){
	return m_model.getTraversable();
}
Namespaced& getNamespaced(){
	return m_nameKeys;
}
Nameable& getNameable(){
	return m_named;
}
TransformNode& getTransformNode(){
	return m_transform;
}
ModelSkin& getModelSkin(){
	return m_skin.get();
}

void attach( scene::Traversable::Observer* observer ){
	m_model.attach( observer );
}
void detach( scene::Traversable::Observer* observer ){
	m_model.detach( observer );
}

void renderSolid( Renderer& renderer, const VolumeTest& volume, const Matrix4& localToWorld, bool selected ) const {
	if ( selected ) {
		m_renderOrigin.render( renderer, volume, localToWorld );
	}

	renderer.SetState( m_entity.getEntityClass().m_state_wire, Renderer::eWireframeOnly );
}
void renderWireframe( Renderer& renderer, const VolumeTest& volume, const Matrix4& localToWorld, bool selected ) const {
	renderSolid( renderer, volume, localToWorld, selected );
	if ( g_showNames ) {
		renderer.addRenderable( m_renderName, localToWorld );
	}
}

void translate( const Vector3& translation ){
	m_origin = origin_translated( m_origin, translation );
}
void rotate( const Quaternion& rotation ){
	if ( g_gameType == eGameTypeDoom3 ) {
		rotation_rotate( m_rotation, rotation );
	}
	else
	{
		m_angle = angle_rotated( m_angle, rotation );
	}
}
void snapto( float snap ){
	m_originKey.m_origin = origin_snapped( m_originKey.m_origin, snap );
	m_originKey.write( &m_entity );
}
void revertTransform(){
	m_origin = m_originKey.m_origin;
	if ( g_gameType == eGameTypeDoom3 ) {
		rotation_assign( m_rotation, m_rotationKey.m_rotation );
	}
	else
	{
		m_angle = m_angleKey.m_angle;
	}
}
void freezeTransform(){
	m_originKey.m_origin = m_origin;
	m_originKey.write( &m_entity );
	if ( g_gameType == eGameTypeDoom3 ) {
		rotation_assign( m_rotationKey.m_rotation, m_rotation );
		m_rotationKey.write( &m_entity );
	}
	else
	{
		m_angleKey.m_angle = m_angle;
		m_angleKey.write( &m_entity );
	}
}
void transformChanged(){
	revertTransform();
	m_evaluateTransform();
	updateTransform();
}
typedef MemberCaller<EclassModel, void(), &EclassModel::transformChanged> TransformChangedCaller;
};

class EclassModelInstance : public TargetableInstance, public TransformModifier, public Renderable
{
class TypeCasts
{
InstanceTypeCastTable m_casts;
public:
TypeCasts(){
	m_casts = TargetableInstance::StaticTypeCasts::instance().get();
	InstanceStaticCast<EclassModelInstance, Renderable>::install( m_casts );
	InstanceStaticCast<EclassModelInstance, Transformable>::install( m_casts );
	InstanceIdentityCast<EclassModelInstance>::install( m_casts );
}
InstanceTypeCastTable& get(){
	return m_casts;
}
};

EclassModel& m_contained;
public:
typedef LazyStatic<TypeCasts> StaticTypeCasts;

STRING_CONSTANT( Name, "EclassModelInstance" );

EclassModelInstance( const scene::Path& path, scene::Instance* parent, EclassModel& contained ) :
	TargetableInstance( path, parent, this, StaticTypeCasts::instance().get(), contained.getEntity(), *this ),
	TransformModifier( EclassModel::TransformChangedCaller( contained ), ApplyTransformCaller( *this ) ),
	m_contained( contained ){
	m_contained.instanceAttach( Instance::path() );

	StaticRenderableConnectionLines::instance().attach( *this );
}
~EclassModelInstance(){
	StaticRenderableConnectionLines::instance().detach( *this );

	m_contained.instanceDetach( Instance::path() );
}
void renderSolid( Renderer& renderer, const VolumeTest& volume ) const {
	m_contained.renderSolid( renderer, volume, Instance::localToWorld(), getSelectable().isSelected() );
}
void renderWireframe( Renderer& renderer, const VolumeTest& volume ) const {
	m_contained.renderWireframe( renderer, volume, Instance::localToWorld(), getSelectable().isSelected() );
}

void evaluateTransform(){
	if ( getType() == TRANSFORM_PRIMITIVE ) {
		m_contained.translate( getTranslation() );
		m_contained.rotate( getRotation() );
	}
}
void applyTransform(){
	m_contained.revertTransform();
	evaluateTransform();
	m_contained.freezeTransform();
}
typedef MemberCaller<EclassModelInstance, void(), &EclassModelInstance::applyTransform> ApplyTransformCaller;
};

class EclassModelNode :
	public scene::Node::Symbiot,
	public scene::Instantiable,
	public scene::Cloneable,
	public scene::Traversable::Observer
{
class TypeCasts
{
NodeTypeCastTable m_casts;
public:
TypeCasts(){
	NodeStaticCast<EclassModelNode, scene::Instantiable>::install( m_casts );
	NodeStaticCast<EclassModelNode, scene::Cloneable>::install( m_casts );
	NodeContainedCast<EclassModelNode, scene::Traversable>::install( m_casts );
	NodeContainedCast<EclassModelNode, Snappable>::install( m_casts );
	NodeContainedCast<EclassModelNode, TransformNode>::install( m_casts );
	NodeContainedCast<EclassModelNode, Entity>::install( m_casts );
	NodeContainedCast<EclassModelNode, Nameable>::install( m_casts );
	NodeContainedCast<EclassModelNode, Namespaced>::install( m_casts );
	NodeContainedCast<EclassModelNode, ModelSkin>::install( m_casts );
}
NodeTypeCastTable& get(){
	return m_casts;
}
};


scene::Node m_node;
InstanceSet m_instances;
EclassModel m_contained;

void construct(){
	m_contained.attach( this );
}
void destroy(){
	m_contained.detach( this );
}

public:
typedef LazyStatic<TypeCasts> StaticTypeCasts;

scene::Traversable& get( NullType<scene::Traversable>){
	return m_contained.getTraversable();
}
Snappable& get( NullType<Snappable>){
	return m_contained;
}
TransformNode& get( NullType<TransformNode>){
	return m_contained.getTransformNode();
}
Entity& get( NullType<Entity>){
	return m_contained.getEntity();
}
Nameable& get( NullType<Nameable>){
	return m_contained.getNameable();
}
Namespaced& get( NullType<Namespaced>){
	return m_contained.getNamespaced();
}
ModelSkin& get( NullType<ModelSkin>){
	return m_contained.getModelSkin();
}

EclassModelNode( EntityClass* eclass ) :
	m_node( this, this, StaticTypeCasts::instance().get() ),
	m_contained( eclass, m_node, InstanceSet::TransformChangedCaller( m_instances ), InstanceSetEvaluateTransform<EclassModelInstance>::Caller( m_instances ) ){
	construct();
}
EclassModelNode( const EclassModelNode& other ) :
	scene::Node::Symbiot( other ),
	scene::Instantiable( other ),
	scene::Cloneable( other ),
	scene::Traversable::Observer( other ),
	m_node( this, this, StaticTypeCasts::instance().get() ),
	m_contained( other.m_contained, m_node, InstanceSet::TransformChangedCaller( m_instances ), InstanceSetEvaluateTransform<EclassModelInstance>::Caller( m_instances ) ){
	construct();
}
~EclassModelNode(){
	destroy();
}
void release(){
	delete this;
}
scene::Node& node(){
	return m_node;
}

void insert( scene::Node& child ){
	m_instances.insert( child );
}
void erase( scene::Node& child ){
	m_instances.erase( child );
}

scene::Node& clone() const {
	return ( new EclassModelNode( *this ) )->node();
}

scene::Instance* create( const scene::Path& path, scene::Instance* parent ){
	return new EclassModelInstance( path, parent, m_contained );
}
void forEachInstance( const scene::Instantiable::Visitor& visitor ){
	m_instances.forEachInstance( visitor );
}
void insert( scene::Instantiable::Observer* observer, const scene::Path& path, scene::Instance* instance ){
	m_instances.insert( observer, path, instance );
}
scene::Instance* erase( scene::Instantiable::Observer* observer, const scene::Path& path ){
	return m_instances.erase( observer, path );
}
};

scene::Node& New_EclassModel( EntityClass* eclass ){
	return ( new EclassModelNode( eclass ) )->node();
}
