#include "sky_box.h"
#include "io/image_loader.h"


void SkyBox::set_radiance_size(RadianceSize p_size) {
	ERR_FAIL_INDEX(p_size,RADIANCE_SIZE_MAX);

	radiance_size=p_size;
	_radiance_changed();
}

SkyBox::RadianceSize SkyBox::get_radiance_size() const {

	return radiance_size;
}

void SkyBox::_bind_methods() {

	ClassDB::bind_method(D_METHOD("set_radiance_size","size"),&SkyBox::set_radiance_size);
	ClassDB::bind_method(D_METHOD("get_radiance_size"),&SkyBox::get_radiance_size);

	ADD_PROPERTY(PropertyInfo(Variant::INT,"radiance_size",PROPERTY_HINT_ENUM,"256,512,1024,2048"),"set_radiance_size","get_radiance_size");


	BIND_CONSTANT( RADIANCE_SIZE_256 );
	BIND_CONSTANT( RADIANCE_SIZE_512 );
	BIND_CONSTANT( RADIANCE_SIZE_1024 );
	BIND_CONSTANT( RADIANCE_SIZE_2048 );
	BIND_CONSTANT( RADIANCE_SIZE_MAX );
}

SkyBox::SkyBox()
{
	radiance_size=RADIANCE_SIZE_512;
}

/////////////////////////////////////////



void ImageSkyBox::_radiance_changed() {

	if (cube_map_valid) {
		static const int size[RADIANCE_SIZE_MAX]={
			256,512,1024,2048
		};
		VS::get_singleton()->skybox_set_texture(sky_box,cube_map,size[get_radiance_size()]);
	}
}

void ImageSkyBox::set_image_path(ImagePath p_image,const String &p_path) {

	ERR_FAIL_INDEX(p_image,IMAGE_PATH_MAX);
	image_path[p_image]=p_path;

	bool all_ok=true;
	for(int i=0;i<IMAGE_PATH_MAX;i++) {
		if (image_path[i]==String()) {
			all_ok=false;
		}
	}

	cube_map_valid=false;

	if (all_ok) {

		Image images[IMAGE_PATH_MAX];
		int w=0,h=0;
		Image::Format format;

		for(int i=0;i<IMAGE_PATH_MAX;i++) {
			Error err = ImageLoader::load_image(image_path[i],&images[i]);
			if (err) {
				ERR_PRINTS("Error loading image for skybox: "+image_path[i]);
				return;
			}

			if (i==0) {
				w=images[0].get_width();
				h=images[0].get_height();
				format=images[0].get_format();
			} else {
				if (images[i].get_width()!=w || images[i].get_height()!=h || images[i].get_format()!=format) {
					ERR_PRINTS("Image size mismatch ("+itos(images[i].get_width())+","+itos(images[i].get_height())+":"+Image::get_format_name(images[i].get_format())+" when it should be "+itos(w)+","+itos(h)+":"+Image::get_format_name(format)+"): "+image_path[i]);
					return;
				}
			}
		}

		VS::get_singleton()->texture_allocate(cube_map,w,h,format,VS::TEXTURE_FLAG_FILTER|VS::TEXTURE_FLAG_CUBEMAP|VS::TEXTURE_FLAG_MIPMAPS);
		for(int i=0;i<IMAGE_PATH_MAX;i++) {
			VS::get_singleton()->texture_set_data(cube_map,images[i],VS::CubeMapSide(i));
		}

		cube_map_valid=true;
		_radiance_changed();
	}


}

String ImageSkyBox::get_image_path(ImagePath p_image) const {

	ERR_FAIL_INDEX_V(p_image,IMAGE_PATH_MAX,String());
	return image_path[p_image];

}

RID ImageSkyBox::get_rid() const {

	return sky_box;
}

void ImageSkyBox::_bind_methods() {

	ClassDB::bind_method(D_METHOD("set_image_path","image","path"),&ImageSkyBox::set_image_path);
	ClassDB::bind_method(D_METHOD("get_image_path","image"),&ImageSkyBox::get_image_path);

	List<String> extensions;
	ImageLoader::get_recognized_extensions(&extensions);
	String hints;
	for(List<String>::Element *E=extensions.front();E;E=E->next()) {
		if (hints!=String()) {
			hints+=",";
		}
		hints+="*."+E->get();
	}

	ADD_GROUP("Image Path","image_path_");
	ADD_PROPERTYI(PropertyInfo(Variant::STRING,"image_path_negative_x",PROPERTY_HINT_FILE,hints),"set_image_path","get_image_path",IMAGE_PATH_NEGATIVE_X);
	ADD_PROPERTYI(PropertyInfo(Variant::STRING,"image_path_positive_x",PROPERTY_HINT_FILE,hints),"set_image_path","get_image_path",IMAGE_PATH_POSITIVE_X);
	ADD_PROPERTYI(PropertyInfo(Variant::STRING,"image_path_negative_y",PROPERTY_HINT_FILE,hints),"set_image_path","get_image_path",IMAGE_PATH_NEGATIVE_Y);
	ADD_PROPERTYI(PropertyInfo(Variant::STRING,"image_path_positive_y",PROPERTY_HINT_FILE,hints),"set_image_path","get_image_path",IMAGE_PATH_POSITIVE_Y);
	ADD_PROPERTYI(PropertyInfo(Variant::STRING,"image_path_negative_z",PROPERTY_HINT_FILE,hints),"set_image_path","get_image_path",IMAGE_PATH_NEGATIVE_Z);
	ADD_PROPERTYI(PropertyInfo(Variant::STRING,"image_path_positive_z",PROPERTY_HINT_FILE,hints),"set_image_path","get_image_path",IMAGE_PATH_POSITIVE_Z);

	BIND_CONSTANT( IMAGE_PATH_NEGATIVE_X );
	BIND_CONSTANT( IMAGE_PATH_POSITIVE_X );
	BIND_CONSTANT( IMAGE_PATH_NEGATIVE_Y );
	BIND_CONSTANT( IMAGE_PATH_POSITIVE_Y );
	BIND_CONSTANT( IMAGE_PATH_NEGATIVE_Z );
	BIND_CONSTANT( IMAGE_PATH_POSITIVE_Z );
	BIND_CONSTANT( IMAGE_PATH_MAX );

}

ImageSkyBox::ImageSkyBox() {

	cube_map=VS::get_singleton()->texture_create();
	sky_box=VS::get_singleton()->skybox_create();
	cube_map_valid=false;
}

ImageSkyBox::~ImageSkyBox() {

	VS::get_singleton()->free(cube_map);
	VS::get_singleton()->free(sky_box);
}