/*************************************************************************/
/*  node_2d.cpp                                                          */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/
#include "node_2d.h"

#include "servers/visual_server.h"
#include "scene/gui/control.h"
#include "scene/main/viewport.h"
#include "message_queue.h"


void Node2D::edit_set_pivot(const Point2& p_pivot) {


}

Point2 Node2D::edit_get_pivot() const {

	return Point2();
}
bool Node2D::edit_has_pivot() const {

	return false;
}

Variant Node2D::edit_get_state() const {

	Array state;
	state.push_back(get_position());
	state.push_back(get_rotation());
	state.push_back(get_scale());

	return state;

}
void Node2D::edit_set_state(const Variant& p_state) {

	Array state = p_state;
	ERR_FAIL_COND( state.size() != 3);

	pos = state[0];
	angle = state[1];
	_scale = state[2];
	_update_transform();
	_change_notify("transform/rot");
	_change_notify("transform/scale");
	_change_notify("transform/pos");

}

void Node2D::edit_set_rect(const Rect2& p_edit_rect) {

	Rect2 r = get_item_rect();

	Vector2 zero_offset;
	if (r.size.x!=0)
		zero_offset.x = -r.pos.x / r.size.x;
	if (r.size.y!=0)
		zero_offset.y = -r.pos.y / r.size.y;

	Size2 new_scale(1,1);

	if (r.size.x!=0)
		new_scale.x = p_edit_rect.size.x / r.size.x;
	if (r.size.y!=0)
		new_scale.y = p_edit_rect.size.y / r.size.y;

	Point2 new_pos = p_edit_rect.pos + p_edit_rect.size*zero_offset;//p_edit_rect.pos - r.pos;

	Transform2D postxf;
	postxf.set_rotation_and_scale(angle,_scale);
	new_pos = postxf.xform(new_pos);

	pos+=new_pos;
	_scale*=new_scale;

	_update_transform();
	_change_notify("transform/scale");
	_change_notify("transform/pos");

}


void Node2D::edit_rotate(float p_rot) {

	angle+=p_rot;
	_update_transform();
	_change_notify("transform/rot");
}


void Node2D::_update_xform_values() {

	pos=_mat.elements[2];
	angle=_mat.get_rotation();
	_scale=_mat.get_scale();
	_xform_dirty=false;
}

void Node2D::_update_transform() {

	Transform2D mat(angle,pos);
	_mat.set_rotation_and_scale(angle,_scale);
	_mat.elements[2]=pos;

	VisualServer::get_singleton()->canvas_item_set_transform(get_canvas_item(),_mat);

	if (!is_inside_tree())
		return;


	_notify_transform();
}

void Node2D::set_position(const Point2& p_pos) {

	if (_xform_dirty)
		((Node2D*)this)->_update_xform_values();
	pos=p_pos;
	_update_transform();
	_change_notify("transform/pos");


}

void Node2D::set_rotation(float p_radians) {

	if (_xform_dirty)
		((Node2D*)this)->_update_xform_values();
	angle=p_radians;
	_update_transform();
	_change_notify("transform/rot");
}

void Node2D::set_rotation_in_degrees(float p_degrees) {

	set_rotation(Math::deg2rad(p_degrees));
}

// Kept for compatibility after rename to set_rotd.
// Could be removed after a couple releases.
void Node2D::_set_rotd(float p_degrees) {

	WARN_PRINT("Deprecated method Node2D._set_rotd(): This method was renamed to set_rotd. Please adapt your code accordingly, as the old method will be obsoleted.");
	set_rotation_in_degrees(p_degrees);
}

void Node2D::set_scale(const Size2& p_scale) {

	if (_xform_dirty)
		((Node2D*)this)->_update_xform_values();
	_scale=p_scale;
	if (_scale.x==0)
		_scale.x=CMP_EPSILON;
	if (_scale.y==0)
		_scale.y=CMP_EPSILON;
	_update_transform();
	_change_notify("transform/scale");

}

Point2 Node2D::get_position() const {

	if (_xform_dirty)
		((Node2D*)this)->_update_xform_values();
	return pos;
}
float Node2D::get_rotation() const {
	if (_xform_dirty)
		((Node2D*)this)->_update_xform_values();

	return angle;
}
float Node2D::get_rotation_in_degrees() const {

	return Math::rad2deg(get_rotation());
}
// Kept for compatibility after rename to get_rotd.
// Could be removed after a couple releases.
float Node2D::_get_rotd() const {

	WARN_PRINT("Deprecated method Node2D._get_rotd(): This method was renamed to get_rotd. Please adapt your code accordingly, as the old method will be obsoleted.");
	return get_rotation_in_degrees();
}
Size2 Node2D::get_scale() const {
	if (_xform_dirty)
		((Node2D*)this)->_update_xform_values();

	return _scale;
}


void Node2D::_notification(int p_what) {

	switch(p_what) {

	}
}

Transform2D Node2D::get_transform() const {

	return _mat;
}

Rect2 Node2D::get_item_rect() const {

	if (get_script_instance()) {
		Variant::CallError err;
		Rect2 r = get_script_instance()->call("_get_item_rect",NULL,0,err);
		if (err.error==Variant::CallError::CALL_OK)
			return r;
	}
	return Rect2(Point2(-32,-32),Size2(64,64));
}

void Node2D::rotate(float p_radians) {

	set_rotation( get_rotation() + p_radians);
}

void Node2D::translate(const Vector2& p_amount) {

	set_position( get_position() + p_amount );
}

void Node2D::global_translate(const Vector2& p_amount) {

	set_global_position( get_global_position() + p_amount );
}

void Node2D::scale(const Size2& p_amount) {

	set_scale( get_scale() * p_amount );
}


void Node2D::move_x(float p_delta,bool p_scaled){

	Transform2D t = get_transform();
	Vector2 m = t[0];
	if (!p_scaled)
		m.normalize();
	set_position(t[2]+m*p_delta);
}

void Node2D::move_y(float p_delta,bool p_scaled){

	Transform2D t = get_transform();
	Vector2 m = t[1];
	if (!p_scaled)
		m.normalize();
	set_position(t[2]+m*p_delta);
}


Point2 Node2D::get_global_position() const {

	return get_global_transform().get_origin();
}

void Node2D::set_global_position(const Point2& p_pos) {

	Transform2D inv;
	CanvasItem *pi = get_parent_item();
	if (pi) {
		inv = pi->get_global_transform().affine_inverse();
		set_position(inv.xform(p_pos));
	} else {
		set_position(p_pos);
	}
}


float Node2D::get_global_rotation() const {

	return get_global_transform().get_rotation();
}

void Node2D::set_global_rotation(float p_radians) {

	CanvasItem *pi = get_parent_item();
	if (pi) {
		const float parent_global_rot = pi->get_global_transform().get_rotation();
		set_rotation(p_radians - parent_global_rot);
	} else {
		set_rotation(p_radians);
	}
}


float Node2D::get_global_rotation_in_degrees() const {

	return Math::rad2deg(get_global_rotation());
}

void Node2D::set_global_rotation_in_degrees(float p_degrees) {

	set_global_rotation(Math::deg2rad(p_degrees));
}


Size2 Node2D::get_global_scale() const {

	return get_global_transform().get_scale();
}

void Node2D::set_global_scale(const Size2& p_scale) {

	CanvasItem *pi = get_parent_item();
	if (pi) {
		const Size2 parent_global_scale = pi->get_global_transform().get_scale();
		set_scale(p_scale - parent_global_scale);
	} else {
		set_scale(p_scale);
	}

}


void Node2D::set_transform(const Transform2D& p_transform) {

	_mat=p_transform;
	_xform_dirty=true;

	VisualServer::get_singleton()->canvas_item_set_transform(get_canvas_item(),_mat);

	if (!is_inside_tree())
		return;

	_notify_transform();
}

void Node2D::set_global_transform(const Transform2D& p_transform) {

	CanvasItem *pi = get_parent_item();
	if (pi)
		set_transform( pi->get_global_transform().affine_inverse() * p_transform);
	else
		set_transform(p_transform);


}

void Node2D::set_z(int p_z) {

	ERR_FAIL_COND(p_z<VS::CANVAS_ITEM_Z_MIN);
	ERR_FAIL_COND(p_z>VS::CANVAS_ITEM_Z_MAX);
	z=p_z;
	VS::get_singleton()->canvas_item_set_z(get_canvas_item(),z);

}

void Node2D::set_z_as_relative(bool p_enabled) {

	if (z_relative==p_enabled)
		return;
	z_relative=p_enabled;
	VS::get_singleton()->canvas_item_set_z_as_relative_to_parent(get_canvas_item(),p_enabled);
}

bool Node2D::is_z_relative() const {

	return z_relative;
}


int Node2D::get_z() const{

	return z;
}

Transform2D Node2D::get_relative_transform_to_parent(const Node *p_parent) const {

	if (p_parent==this)
		return Transform2D();

	Node2D *parent_2d = get_parent()->cast_to<Node2D>();

	ERR_FAIL_COND_V(!parent_2d,Transform2D());
	if (p_parent==parent_2d)
		return get_transform();
	else
		return parent_2d->get_relative_transform_to_parent(p_parent) * get_transform();
}


void Node2D::look_at(const Vector2& p_pos) {

	rotate(get_angle_to(p_pos));
}

float Node2D::get_angle_to(const Vector2& p_pos) const {

	return (get_global_transform().affine_inverse().xform(p_pos)).angle();
}

void Node2D::_bind_methods() {


	// TODO: Obsolete those two methods (old name) properly (GH-4397)
	ClassDB::bind_method(_MD("_get_rotd"),&Node2D::_get_rotd);
	ClassDB::bind_method(_MD("_set_rotd","degrees"),&Node2D::_set_rotd);

	ClassDB::bind_method(_MD("set_position","pos"),&Node2D::set_position);
	ClassDB::bind_method(_MD("set_rotation","radians"),&Node2D::set_rotation);
	ClassDB::bind_method(_MD("set_rotation_in_degrees","degrees"),&Node2D::set_rotation_in_degrees);
	ClassDB::bind_method(_MD("set_scale","scale"),&Node2D::set_scale);

	ClassDB::bind_method(_MD("get_position"),&Node2D::get_position);
	ClassDB::bind_method(_MD("get_rotation"),&Node2D::get_rotation);
	ClassDB::bind_method(_MD("get_rotation_in_degrees"),&Node2D::get_rotation_in_degrees);
	ClassDB::bind_method(_MD("get_scale"),&Node2D::get_scale);

	ClassDB::bind_method(_MD("rotate","radians"),&Node2D::rotate);
	ClassDB::bind_method(_MD("move_local_x","delta","scaled"),&Node2D::move_x,DEFVAL(false));
	ClassDB::bind_method(_MD("move_local_y","delta","scaled"),&Node2D::move_y,DEFVAL(false));
	ClassDB::bind_method(_MD("translate","offset"),&Node2D::translate);
	ClassDB::bind_method(_MD("global_translate","offset"),&Node2D::global_translate);
	ClassDB::bind_method(_MD("scale","ratio"),&Node2D::scale);

	ClassDB::bind_method(_MD("set_global_position","pos"),&Node2D::set_global_position);
	ClassDB::bind_method(_MD("get_global_position"),&Node2D::get_global_position);
	ClassDB::bind_method(_MD("set_global_rotation","radians"),&Node2D::set_global_rotation);
	ClassDB::bind_method(_MD("get_global_rotation"),&Node2D::get_global_rotation);
	ClassDB::bind_method(_MD("set_global_rotation_in_degrees","degrees"),&Node2D::set_global_rotation_in_degrees);
	ClassDB::bind_method(_MD("get_global_rotation_in_degrees"),&Node2D::get_global_rotation_in_degrees);
	ClassDB::bind_method(_MD("set_global_scale","scale"),&Node2D::set_global_scale);
	ClassDB::bind_method(_MD("get_global_scale"),&Node2D::get_global_scale);

	ClassDB::bind_method(_MD("set_transform","xform"),&Node2D::set_transform);
	ClassDB::bind_method(_MD("set_global_transform","xform"),&Node2D::set_global_transform);

	ClassDB::bind_method(_MD("look_at","point"),&Node2D::look_at);
	ClassDB::bind_method(_MD("get_angle_to","point"),&Node2D::get_angle_to);

	ClassDB::bind_method(_MD("set_z","z"),&Node2D::set_z);
	ClassDB::bind_method(_MD("get_z"),&Node2D::get_z);

	ClassDB::bind_method(_MD("set_z_as_relative","enable"),&Node2D::set_z_as_relative);
	ClassDB::bind_method(_MD("is_z_relative"),&Node2D::is_z_relative);

	ClassDB::bind_method(_MD("edit_set_pivot","pivot"),&Node2D::edit_set_pivot);

	ClassDB::bind_method(_MD("get_relative_transform_to_parent","parent"),&Node2D::get_relative_transform_to_parent);

	ADD_GROUP("Transform","");
	ADD_PROPERTYNZ(PropertyInfo(Variant::VECTOR2,"position"),"set_position","get_position");
	ADD_PROPERTYNZ(PropertyInfo(Variant::REAL,"rotation",PROPERTY_HINT_NONE,"",PROPERTY_USAGE_NOEDITOR),"set_rotation","get_rotation");
	ADD_PROPERTYNZ(PropertyInfo(Variant::REAL,"rotation_deg",PROPERTY_HINT_RANGE,"-1440,1440,0.1",PROPERTY_USAGE_EDITOR),"set_rotation_in_degrees","get_rotation_in_degrees");
	ADD_PROPERTYNO(PropertyInfo(Variant::VECTOR2,"scale"),"set_scale","get_scale");
	ADD_PROPERTY(PropertyInfo(Variant::TRANSFORM2D,"transform",PROPERTY_HINT_NONE,"",0),"set_transform","get_transform");

	ADD_PROPERTY(PropertyInfo(Variant::REAL,"global_position",PROPERTY_HINT_NONE,"",0),"set_global_position","get_global_position");
	ADD_PROPERTY(PropertyInfo(Variant::REAL,"global_rotation",PROPERTY_HINT_NONE,"",0),"set_global_rotation","get_global_rotation");
	ADD_PROPERTY(PropertyInfo(Variant::REAL,"global_rotation_deg",PROPERTY_HINT_NONE,"",0),"set_global_rotation_in_degrees","get_global_rotation_in_degrees");
	ADD_PROPERTY(PropertyInfo(Variant::REAL,"global_scale",PROPERTY_HINT_NONE,"",0),"set_global_scale","get_global_scale");
	ADD_PROPERTY(PropertyInfo(Variant::TRANSFORM2D,"global_transform",PROPERTY_HINT_NONE,"",0),"set_global_transform","get_global_transform");

	ADD_GROUP("Z","");
	ADD_PROPERTYNZ(PropertyInfo(Variant::INT,"z",PROPERTY_HINT_RANGE,itos(VS::CANVAS_ITEM_Z_MIN)+","+itos(VS::CANVAS_ITEM_Z_MAX)+",1"),"set_z","get_z");
	ADD_PROPERTYNO(PropertyInfo(Variant::BOOL,"z_as_relative"),"set_z_as_relative","is_z_relative");


}


Node2D::Node2D() {


	angle=0;
	_scale=Vector2(1,1);
	_xform_dirty=false;
	z=0;
	z_relative=true;

}