/*************************************************************************/
/*  light_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 "light_2d.h"
#include "servers/visual_server.h"

void Light2D::edit_set_pivot(const Point2& p_pivot) {

	set_texture_offset(p_pivot);

}

Point2 Light2D::edit_get_pivot() const {

	return get_texture_offset();
}
bool Light2D::edit_has_pivot() const {

	return true;
}

Rect2 Light2D::get_item_rect() const {

	if (texture.is_null())
		return Rect2(0,0,1,1);

	Size2i s;

	s = texture->get_size()*_scale;
	Point2i ofs=texture_offset;
	ofs-=s/2;

	if (s==Size2(0,0))
		s=Size2(1,1);

	return Rect2(ofs,s);
}


void Light2D::_update_light_visibility() {

	if (!is_inside_tree())
		return;

	bool editor_ok=true;

#ifdef TOOLS_ENABLED
	if (editor_only) {
		if (!get_tree()->is_editor_hint()) {
			editor_ok=false;
		} else {
			editor_ok = (get_tree()->get_edited_scene_root() && (this==get_tree()->get_edited_scene_root() || get_owner()==get_tree()->get_edited_scene_root()));
		}
	}
#else
	if (editor_only) {
		editor_ok=false;
	}
#endif

	VS::get_singleton()->canvas_light_set_enabled(canvas_light,enabled && is_visible_in_tree() && editor_ok);
}

void Light2D::set_enabled( bool p_enabled) {


	enabled=p_enabled;
	_update_light_visibility();
}

bool Light2D::is_enabled() const {

	return enabled;
}

void Light2D::set_editor_only(bool p_editor_only) {

	editor_only=p_editor_only;
	_update_light_visibility();
}

bool Light2D::is_editor_only() const{

	return editor_only;
}

void Light2D::set_texture( const Ref<Texture>& p_texture) {

	texture=p_texture;
	if (texture.is_valid())
		VS::get_singleton()->canvas_light_set_texture(canvas_light,texture->get_rid());
	else
		VS::get_singleton()->canvas_light_set_texture(canvas_light,RID());

	update_configuration_warning();
}

Ref<Texture> Light2D::get_texture() const {

	return texture;
}

void Light2D::set_texture_offset( const Vector2& p_offset) {

	texture_offset=p_offset;
	VS::get_singleton()->canvas_light_set_texture_offset(canvas_light,texture_offset);
	item_rect_changed();

}

Vector2 Light2D::get_texture_offset() const {

	return texture_offset;
}

void Light2D::set_color( const Color& p_color) {

	color=p_color;
	VS::get_singleton()->canvas_light_set_color(canvas_light,color);

}
Color Light2D::get_color() const {

	return color;
}

void Light2D::set_height( float p_height) {

	height=p_height;
	VS::get_singleton()->canvas_light_set_height(canvas_light,height);

}


float Light2D::get_height() const {

	return height;
}

void Light2D::set_energy( float p_energy) {

	energy=p_energy;
	VS::get_singleton()->canvas_light_set_energy(canvas_light,energy);

}


float Light2D::get_energy() const {

	return energy;
}



void Light2D::set_texture_scale( float p_scale) {

	_scale=p_scale;
	VS::get_singleton()->canvas_light_set_scale(canvas_light,_scale);
	item_rect_changed();

}


float Light2D::get_texture_scale() const {

	return _scale;
}

void Light2D::set_z_range_min( int p_min_z) {

	z_min=p_min_z;
	VS::get_singleton()->canvas_light_set_z_range(canvas_light,z_min,z_max);

}
int Light2D::get_z_range_min() const {

	return z_min;
}

void Light2D::set_z_range_max( int p_max_z) {

	z_max=p_max_z;
	VS::get_singleton()->canvas_light_set_z_range(canvas_light,z_min,z_max);

}
int Light2D::get_z_range_max() const {

	return z_max;
}

void Light2D::set_layer_range_min( int p_min_layer) {

	layer_min=p_min_layer;
	VS::get_singleton()->canvas_light_set_layer_range(canvas_light,layer_min,layer_max);

}
int Light2D::get_layer_range_min() const {

	return layer_min;
}

void Light2D::set_layer_range_max( int p_max_layer) {

	layer_max=p_max_layer;
	VS::get_singleton()->canvas_light_set_layer_range(canvas_light,layer_min,layer_max);

}
int Light2D::get_layer_range_max() const {

	return layer_max;
}

void Light2D::set_item_cull_mask( int p_mask) {

	item_mask=p_mask;
	VS::get_singleton()->canvas_light_set_item_cull_mask(canvas_light,item_mask);

}

int Light2D::get_item_cull_mask() const {

	return item_mask;
}

void Light2D::set_item_shadow_cull_mask( int p_mask) {

	item_shadow_mask=p_mask;
	VS::get_singleton()->canvas_light_set_item_shadow_cull_mask(canvas_light,item_shadow_mask);

}

int Light2D::get_item_shadow_cull_mask() const {

	return item_shadow_mask;
}

void Light2D::set_mode( Mode p_mode ) {

	mode=p_mode;
	VS::get_singleton()->canvas_light_set_mode(canvas_light,VS::CanvasLightMode(p_mode));
}

Light2D::Mode Light2D::get_mode() const {

	return mode;
}

void Light2D::set_shadow_enabled( bool p_enabled) {

	shadow=p_enabled;
	VS::get_singleton()->canvas_light_set_shadow_enabled(canvas_light,shadow);

}
bool Light2D::is_shadow_enabled() const {

	return shadow;
}

void Light2D::set_shadow_buffer_size( int p_size ) {

	shadow_buffer_size=p_size;
	VS::get_singleton()->canvas_light_set_shadow_buffer_size(canvas_light,shadow_buffer_size);
}

int Light2D::get_shadow_buffer_size() const {

	return shadow_buffer_size;
}

void Light2D::set_shadow_gradient_length( float p_multiplier) {

	shadow_gradient_length=p_multiplier;
	VS::get_singleton()->canvas_light_set_shadow_gradient_length(canvas_light,p_multiplier);
}

float Light2D::get_shadow_gradient_length() const{

	return shadow_gradient_length;
}


void Light2D::set_shadow_filter( ShadowFilter p_filter) {
	shadow_filter=p_filter;
	VS::get_singleton()->canvas_light_set_shadow_filter(canvas_light,VS::CanvasLightShadowFilter(p_filter ));
}

Light2D::ShadowFilter Light2D::get_shadow_filter() const {

	return shadow_filter;
}



void Light2D::set_shadow_color( const Color& p_shadow_color) {
	shadow_color=p_shadow_color;
	VS::get_singleton()->canvas_light_set_shadow_color(canvas_light,shadow_color);
}

Color Light2D::get_shadow_color() const {
	return shadow_color;
}



void Light2D::_notification(int p_what) {

	if (p_what==NOTIFICATION_ENTER_TREE) {

		VS::get_singleton()->canvas_light_attach_to_canvas( canvas_light, get_canvas() );
		_update_light_visibility();
	}

	if (p_what==NOTIFICATION_TRANSFORM_CHANGED) {

		VS::get_singleton()->canvas_light_set_transform( canvas_light, get_global_transform());
	}
	if (p_what==NOTIFICATION_VISIBILITY_CHANGED) {

		_update_light_visibility();
	}

	if (p_what==NOTIFICATION_EXIT_TREE) {

		VS::get_singleton()->canvas_light_attach_to_canvas( canvas_light, RID() );
		_update_light_visibility();
	}

}

String Light2D::get_configuration_warning() const {

	if (!texture.is_valid()) {
		return TTR("A texture with the shape of the light must be supplied to the 'texture' property.");
	}

	return String();
}


void Light2D::_bind_methods() {


	ClassDB::bind_method(D_METHOD("set_enabled","enabled"),&Light2D::set_enabled);
	ClassDB::bind_method(D_METHOD("is_enabled"),&Light2D::is_enabled);

	ClassDB::bind_method(D_METHOD("set_editor_only","editor_only"), &Light2D::set_editor_only );
	ClassDB::bind_method(D_METHOD("is_editor_only"), &Light2D::is_editor_only );

	ClassDB::bind_method(D_METHOD("set_texture","texture"),&Light2D::set_texture);
	ClassDB::bind_method(D_METHOD("get_texture"),&Light2D::get_texture);

	ClassDB::bind_method(D_METHOD("set_texture_offset","texture_offset"),&Light2D::set_texture_offset);
	ClassDB::bind_method(D_METHOD("get_texture_offset"),&Light2D::get_texture_offset);

	ClassDB::bind_method(D_METHOD("set_color","color"),&Light2D::set_color);
	ClassDB::bind_method(D_METHOD("get_color"),&Light2D::get_color);

	ClassDB::bind_method(D_METHOD("set_height","height"),&Light2D::set_height);
	ClassDB::bind_method(D_METHOD("get_height"),&Light2D::get_height);

	ClassDB::bind_method(D_METHOD("set_energy","energy"),&Light2D::set_energy);
	ClassDB::bind_method(D_METHOD("get_energy"),&Light2D::get_energy);

	ClassDB::bind_method(D_METHOD("set_texture_scale","texture_scale"),&Light2D::set_texture_scale);
	ClassDB::bind_method(D_METHOD("get_texture_scale"),&Light2D::get_texture_scale);


	ClassDB::bind_method(D_METHOD("set_z_range_min","z"),&Light2D::set_z_range_min);
	ClassDB::bind_method(D_METHOD("get_z_range_min"),&Light2D::get_z_range_min);

	ClassDB::bind_method(D_METHOD("set_z_range_max","z"),&Light2D::set_z_range_max);
	ClassDB::bind_method(D_METHOD("get_z_range_max"),&Light2D::get_z_range_max);

	ClassDB::bind_method(D_METHOD("set_layer_range_min","layer"),&Light2D::set_layer_range_min);
	ClassDB::bind_method(D_METHOD("get_layer_range_min"),&Light2D::get_layer_range_min);

	ClassDB::bind_method(D_METHOD("set_layer_range_max","layer"),&Light2D::set_layer_range_max);
	ClassDB::bind_method(D_METHOD("get_layer_range_max"),&Light2D::get_layer_range_max);


	ClassDB::bind_method(D_METHOD("set_item_cull_mask","item_cull_mask"),&Light2D::set_item_cull_mask);
	ClassDB::bind_method(D_METHOD("get_item_cull_mask"),&Light2D::get_item_cull_mask);

	ClassDB::bind_method(D_METHOD("set_item_shadow_cull_mask","item_shadow_cull_mask"),&Light2D::set_item_shadow_cull_mask);
	ClassDB::bind_method(D_METHOD("get_item_shadow_cull_mask"),&Light2D::get_item_shadow_cull_mask);

	ClassDB::bind_method(D_METHOD("set_mode","mode"),&Light2D::set_mode);
	ClassDB::bind_method(D_METHOD("get_mode"),&Light2D::get_mode);

	ClassDB::bind_method(D_METHOD("set_shadow_enabled","enabled"),&Light2D::set_shadow_enabled);
	ClassDB::bind_method(D_METHOD("is_shadow_enabled"),&Light2D::is_shadow_enabled);

	ClassDB::bind_method(D_METHOD("set_shadow_buffer_size","size"),&Light2D::set_shadow_buffer_size);
	ClassDB::bind_method(D_METHOD("get_shadow_buffer_size"),&Light2D::get_shadow_buffer_size);

	ClassDB::bind_method(D_METHOD("set_shadow_gradient_length","multiplier"),&Light2D::set_shadow_gradient_length);
	ClassDB::bind_method(D_METHOD("get_shadow_gradient_length"),&Light2D::get_shadow_gradient_length);

	ClassDB::bind_method(D_METHOD("set_shadow_filter","filter"),&Light2D::set_shadow_filter);
	ClassDB::bind_method(D_METHOD("get_shadow_filter"),&Light2D::get_shadow_filter);

	ClassDB::bind_method(D_METHOD("set_shadow_color","shadow_color"),&Light2D::set_shadow_color);
	ClassDB::bind_method(D_METHOD("get_shadow_color"),&Light2D::get_shadow_color);


	ADD_PROPERTY( PropertyInfo(Variant::BOOL,"enabled"),"set_enabled","is_enabled");
	ADD_PROPERTY( PropertyInfo(Variant::BOOL, "editor_only"),"set_editor_only","is_editor_only");
	ADD_PROPERTY( PropertyInfo(Variant::OBJECT,"texture",PROPERTY_HINT_RESOURCE_TYPE,"Texture"),"set_texture","get_texture");
	ADD_PROPERTY( PropertyInfo(Variant::VECTOR2,"offset"),"set_texture_offset","get_texture_offset");
	ADD_PROPERTY( PropertyInfo(Variant::REAL,"scale",PROPERTY_HINT_RANGE,"0.01,50,0.01"),"set_texture_scale","get_texture_scale");
	ADD_PROPERTY( PropertyInfo(Variant::COLOR,"color"),"set_color","get_color");
	ADD_PROPERTY( PropertyInfo(Variant::REAL,"energy",PROPERTY_HINT_RANGE,"0.01,100,0.01"),"set_energy","get_energy");
	ADD_PROPERTY( PropertyInfo(Variant::INT,"mode",PROPERTY_HINT_ENUM,"Add,Sub,Mix,Mask"),"set_mode","get_mode");
	ADD_GROUP("Range","range_");
	ADD_PROPERTY( PropertyInfo(Variant::REAL,"range_height",PROPERTY_HINT_RANGE,"-100,100,0.1"),"set_height","get_height");
	ADD_PROPERTY( PropertyInfo(Variant::INT,"range_z_min",PROPERTY_HINT_RANGE,itos(VS::CANVAS_ITEM_Z_MIN)+","+itos(VS::CANVAS_ITEM_Z_MAX)+",1"),"set_z_range_min","get_z_range_min");
	ADD_PROPERTY( PropertyInfo(Variant::INT,"range_z_max",PROPERTY_HINT_RANGE,itos(VS::CANVAS_ITEM_Z_MIN)+","+itos(VS::CANVAS_ITEM_Z_MAX)+",1"),"set_z_range_max","get_z_range_max");
	ADD_PROPERTY( PropertyInfo(Variant::INT,"range_layer_min",PROPERTY_HINT_RANGE,"-512,512,1"),"set_layer_range_min","get_layer_range_min");
	ADD_PROPERTY( PropertyInfo(Variant::INT,"range_layer_max",PROPERTY_HINT_RANGE,"-512,512,1"),"set_layer_range_max","get_layer_range_max");
	ADD_PROPERTY( PropertyInfo(Variant::INT,"range_item_cull_mask",PROPERTY_HINT_LAYERS_2D_RENDER),"set_item_cull_mask","get_item_cull_mask");

	ADD_GROUP("Shadow","shadow_");
	ADD_PROPERTY( PropertyInfo(Variant::BOOL,"shadow_enabled"),"set_shadow_enabled","is_shadow_enabled");
	ADD_PROPERTY( PropertyInfo(Variant::COLOR,"shadow_color"),"set_shadow_color","get_shadow_color");
	ADD_PROPERTY( PropertyInfo(Variant::INT,"shadow_buffer_size",PROPERTY_HINT_RANGE,"32,16384,1"),"set_shadow_buffer_size","get_shadow_buffer_size");
	ADD_PROPERTY( PropertyInfo(Variant::REAL,"shadow_gradient_length",PROPERTY_HINT_RANGE,"1,4096,0.1"),"set_shadow_gradient_length","get_shadow_gradient_length");
	ADD_PROPERTY( PropertyInfo(Variant::REAL,"shadow_filter",PROPERTY_HINT_ENUM,"None,PCF3,PCF5,PCF9,PCF13"),"set_shadow_filter","get_shadow_filter");
	ADD_PROPERTY( PropertyInfo(Variant::INT,"shadow_item_cull_mask",PROPERTY_HINT_LAYERS_2D_RENDER),"set_item_shadow_cull_mask","get_item_shadow_cull_mask");

	BIND_CONSTANT( MODE_ADD );
	BIND_CONSTANT( MODE_SUB );
	BIND_CONSTANT( MODE_MIX );
	BIND_CONSTANT( MODE_MASK );


}

Light2D::Light2D() {

	canvas_light=VisualServer::get_singleton()->canvas_light_create();
	enabled=true;
	editor_only=false;
	shadow=false;
	color=Color(1,1,1);
	height=0;
	_scale=1.0;
	z_min=-1024;
	z_max=1024;
	layer_min=0;
	layer_max=0;
	item_mask=1;
	item_shadow_mask=1;
	mode=MODE_ADD;
	shadow_buffer_size=2048;
	shadow_gradient_length=0;
	energy=1.0;
	shadow_color=Color(0,0,0,0);
	shadow_filter=SHADOW_FILTER_NONE;

	set_notify_transform(true);
}

Light2D::~Light2D() {

	VisualServer::get_singleton()->free(canvas_light);
}