/*
   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 the Quake3 misc_model entity.
///
/// This entity displays the model specified in its "model" key.
/// The "origin", "angles" and "modelscale*" keys directly control the entity's local-to-parent transform.

#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 "eclasslib.h"
#include "render.h"
#include "pivot.h"

#include "targetable.h"
#include "origin.h"
#include "angles.h"
#include "scale.h"
#include "model.h"
#include "filters.h"
#include "namedentity.h"
#include "keyobservers.h"
#include "namekeys.h"

#include "entity.h"

#include "modelskinkey.h"

#include "modelskin.h"
class RemapKeysObserver : public Entity::Observer, public ModelSkin
{
	class RemapKey
	{
		const Callback& m_skinChangedCallback;
		public:
		CopiedString m_from;
		CopiedString m_to;
		RemapKey( const Callback& skinChangedCallback ) : m_skinChangedCallback( skinChangedCallback ){
		}
		void remapKeyChanged( const char* value ){
			const char* split = strchr( value, ';' );
			if( split != nullptr ){
				m_from = { value, split };
				StringOutputStream stream( 64 );
				stream << PathCleaned( split + 1 );
				m_to = stream.c_str();
			}
			else{
				m_from = "";
				m_to = "";
			}
			m_skinChangedCallback();
		}
		typedef MemberCaller1<RemapKey, const char*, &RemapKey::remapKeyChanged> remapKeyChangedCaller;
	};
	typedef std::multimap<CopiedString, RemapKey> RemapKeys;
	RemapKeys m_remapKeys;
	const Callback m_skinChangedCallback;

public:
	RemapKeysObserver() = delete;
	RemapKeysObserver( const RemapKeysObserver& ) = delete;
	RemapKeysObserver operator=( const RemapKeysObserver& ) = delete;
	RemapKeysObserver( const Callback& skinChangedCallback ) : m_skinChangedCallback( skinChangedCallback ){
	}

void insert( const char* key, EntityKeyValue& value ) override {
	if( string_equal_prefix( key, "_remap" ) ){
		value.attach( RemapKey::remapKeyChangedCaller( m_remapKeys.emplace( key, m_skinChangedCallback )->second ) );
	}
}
void erase( const char* key, EntityKeyValue& value ) override {
	if( string_equal_prefix( key, "_remap" ) ){
		for( RemapKeys::iterator i = m_remapKeys.find( key ); i != m_remapKeys.end() && string_equal( ( *i ).first.c_str(), key ); ){
			value.detach( RemapKey::remapKeyChangedCaller( i->second ) );
			i = m_remapKeys.erase( i );
		}
	}
}

void attach( ModuleObserver& observer ) override {
}
void detach( ModuleObserver& observer ) override {
}
bool realised() const override {
	return true;
}
const char* getRemap( const char* name ) const override { // this logic is supposed to respect one in q3map2
	const char* to = "";
	std::size_t fromlen = 0;
	for( const auto& pair : m_remapKeys ){
		const RemapKey& remapKey = pair.second;
		if( remapKey.m_from == "*" && fromlen == 0 ){ // only globbing, if no respective match
			to = remapKey.m_to.c_str();
		}
		else if( string_equal_suffix_nocase( name, remapKey.m_from.c_str() ) && strlen( remapKey.m_from.c_str() ) > fromlen ){ // longer match has priority
			to = remapKey.m_to.c_str();
			fromlen = strlen( remapKey.m_from.c_str() );
		}
	}
	return to;
}
void forEachRemap( const SkinRemapCallback& callback ) const override {
}
};


const char EXCLUDE_NAME[] = "misc_model";

class MiscModel :
	public Snappable
{
EntityKeyValues m_entity;
KeyObserverMap m_keyObservers;
RemapKeysObserver m_remapKeysObserver;
MatrixTransform m_transform;

OriginKey m_originKey;
Vector3 m_origin;
AnglesKey m_anglesKey;
Vector3 m_angles;
ScaleKey m_scaleKey;
Vector3 m_scale;

SingletonModel m_model;

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

Callback m_transformChanged;
Callback m_evaluateTransform;

void construct(){
	m_keyObservers.insert( "classname", ClassnameFilter::ClassnameChangedCaller( m_filter ) );
	m_keyObservers.insert( Static<KeyIsName>::instance().m_nameKey, NamedEntity::IdentifierChangedCaller( m_named ) );
	m_keyObservers.insert( m_entity.getEntityClass().miscmodel_key(), SingletonModel::ModelChangedCaller( m_model ) );
	m_keyObservers.insert( "origin", OriginKey::OriginChangedCaller( m_originKey ) );
	m_keyObservers.insert( "angle", AnglesKey::AngleChangedCaller( m_anglesKey ) );
	m_keyObservers.insert( "angles", AnglesKey::AnglesChangedCaller( m_anglesKey ) );
	m_keyObservers.insert( "modelscale", ScaleKey::UniformScaleChangedCaller( m_scaleKey ) );
	m_keyObservers.insert( "modelscale_vec", ScaleKey::ScaleChangedCaller( m_scaleKey ) );
}

void updateTransform(){
	m_transform.localToParent() = g_matrix4_identity;
	matrix4_transform_by_euler_xyz_degrees( m_transform.localToParent(), m_origin, m_angles, m_scale );
	m_transformChanged();
}

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

void originChanged(){
	m_origin = m_originKey.m_origin;
	updateTransform();
}
typedef MemberCaller<MiscModel, &MiscModel::originChanged> OriginChangedCaller;
void anglesChanged(){
	m_angles = m_anglesKey.m_angles;
	updateTransform();
}
typedef MemberCaller<MiscModel, &MiscModel::anglesChanged> AnglesChangedCaller;
void scaleChanged(){
	m_scale = m_scaleKey.m_scale;
	updateTransform();
}
typedef MemberCaller<MiscModel, &MiscModel::scaleChanged> ScaleChangedCaller;

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

public:

MiscModel( EntityClass* eclass, scene::Node& node, const Callback& transformChanged, const Callback& evaluateTransform ) :
	m_entity( eclass ),
	m_remapKeysObserver( SkinChangedCaller( *this ) ),
	m_originKey( OriginChangedCaller( *this ) ),
	m_origin( ORIGINKEY_IDENTITY ),
	m_anglesKey( AnglesChangedCaller( *this ) ),
	m_angles( ANGLESKEY_IDENTITY ),
	m_scaleKey( ScaleChangedCaller( *this ) ),
	m_scale( SCALEKEY_IDENTITY ),
	m_filter( m_entity, node ),
	m_named( m_entity ),
	m_nameKeys( m_entity ),
	m_renderName( m_named, g_vector3_identity, EXCLUDE_NAME ),
	m_transformChanged( transformChanged ),
	m_evaluateTransform( evaluateTransform ){
	construct();
}
MiscModel( const MiscModel& other, scene::Node& node, const Callback& transformChanged, const Callback& evaluateTransform ) :
	m_entity( other.m_entity ),
	m_remapKeysObserver( SkinChangedCaller( *this ) ),
	m_originKey( OriginChangedCaller( *this ) ),
	m_origin( ORIGINKEY_IDENTITY ),
	m_anglesKey( AnglesChangedCaller( *this ) ),
	m_angles( ANGLESKEY_IDENTITY ),
	m_scaleKey( ScaleChangedCaller( *this ) ),
	m_scale( SCALEKEY_IDENTITY ),
	m_filter( m_entity, node ),
	m_named( m_entity ),
	m_nameKeys( m_entity ),
	m_renderName( m_named, g_vector3_identity, EXCLUDE_NAME ),
	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_entity.attach( m_remapKeysObserver );
	}
}
void instanceDetach( const scene::Path& path ){
	if ( --m_instanceCounter.m_count == 0 ) {
		m_entity.detach( m_remapKeysObserver );
		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_remapKeysObserver;
}

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 );
	if ( m_renderName.excluded_not()
		&& ( selected || ( g_showNames && ( volume.fill() || aabb_fits_view( AABB( Vector3( 0, 0, 0 ), Vector3( 32, 32, 32 ) ), volume.GetModelview(), volume.GetViewport(), g_showNamesRatio ) ) ) ) ) {
		m_renderName.render( renderer, volume, localToWorld, selected );
	}
}
void renderWireframe( Renderer& renderer, const VolumeTest& volume, const Matrix4& localToWorld, bool selected ) const {
	renderSolid( renderer, volume, localToWorld, selected );
}

void translate( const Vector3& translation ){
	m_origin = origin_translated( m_origin, translation );
}
void rotate( const Quaternion& rotation ){
	//m_angles = angles_rotated_for_rotated_pivot( m_angles, rotation );
	m_angles = angles_rotated( m_angles, rotation );
}
void scale( const Vector3& scaling ){
	//m_scale = scale_scaled( m_scale, scaling );

	Matrix4 mat( matrix4_scale_for_vec3( scaling ) );
	matrix4_multiply_by_matrix4( mat, matrix4_rotation_for_euler_xyz_degrees( m_anglesKey.m_angles ) );
	matrix4_scale_by_vec3( mat, m_scale );

	m_scale = matrix4_get_scale_vec3( mat );
	//m_angles = angles_snapped_to_zero( matrix4_get_rotation_euler_xyz_degrees( mat ) );
}
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;
	m_angles = m_anglesKey.m_angles;
	m_scale = m_scaleKey.m_scale;
}
void freezeTransform(){
	m_originKey.m_origin = m_origin;
	m_originKey.write( &m_entity );
	if( m_anglesKey.m_angles != m_angles ){
		m_anglesKey.m_angles = m_angles;
		m_anglesKey.write( &m_entity );
	}
	m_scaleKey.m_scale = m_scale;
	m_scaleKey.write( &m_entity );
}
void transformChanged(){
	revertTransform();
	m_evaluateTransform();
	updateTransform();
}
typedef MemberCaller<MiscModel, &MiscModel::transformChanged> TransformChangedCaller;
};

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

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

STRING_CONSTANT( Name, "MiscModelInstance" );

MiscModelInstance( const scene::Path& path, scene::Instance* parent, MiscModel& miscmodel ) :
	TargetableInstance( path, parent, this, StaticTypeCasts::instance().get(), miscmodel.getEntity(), *this ),
	TransformModifier( MiscModel::TransformChangedCaller( miscmodel ), ApplyTransformCaller( *this ) ),
	m_contained( miscmodel ){
	m_contained.instanceAttach( Instance::path() );
	StaticRenderableConnectionLines::instance().attach( *this );
}
~MiscModelInstance(){
	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() );
		if( getRotation() != c_quaternion_identity ){
			m_contained.rotate( getRotation() );
		}
		if( getScale() != c_scale_identity ){
			m_contained.scale( getScale() );
		}
	}
}
void applyTransform(){
	m_contained.revertTransform();
	evaluateTransform();
	m_contained.freezeTransform();
}
typedef MemberCaller<MiscModelInstance, &MiscModelInstance::applyTransform> ApplyTransformCaller;
};

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


scene::Node m_node;
InstanceSet m_instances;
MiscModel 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();
}

MiscModelNode( EntityClass* eclass ) :
	m_node( this, this, StaticTypeCasts::instance().get() ),
	m_contained( eclass, m_node, InstanceSet::TransformChangedCaller( m_instances ), InstanceSetEvaluateTransform<MiscModelInstance>::Caller( m_instances ) ){
	construct();
}
MiscModelNode( const MiscModelNode& 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<MiscModelInstance>::Caller( m_instances ) ){
	construct();
}
~MiscModelNode(){
	destroy();
}

void release(){
	delete this;
}
scene::Node& node(){
	return m_node;
}

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

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

scene::Instance* create( const scene::Path& path, scene::Instance* parent ){
	return new MiscModelInstance( 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_MiscModel( EntityClass* eclass ){
	return ( new MiscModelNode( eclass ) )->node();
}

void MiscModel_construct(){
}
void MiscModel_destroy(){
}