/*************************************************************************/
/*  fog_volume.cpp                                                       */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
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#include "fog_volume.h"
#include "scene/resources/environment.h"

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

void FogVolume::_bind_methods() {
	ClassDB::bind_method(D_METHOD("set_extents", "extents"), &FogVolume::set_extents);
	ClassDB::bind_method(D_METHOD("get_extents"), &FogVolume::get_extents);
	ClassDB::bind_method(D_METHOD("set_shape", "shape"), &FogVolume::set_shape);
	ClassDB::bind_method(D_METHOD("get_shape"), &FogVolume::get_shape);
	ClassDB::bind_method(D_METHOD("set_material", "material"), &FogVolume::set_material);
	ClassDB::bind_method(D_METHOD("get_material"), &FogVolume::get_material);

	ADD_PROPERTY(PropertyInfo(Variant::VECTOR3, "extents", PROPERTY_HINT_RANGE, "0.01,1024,0.01,or_greater,suffix:m"), "set_extents", "get_extents");
	ADD_PROPERTY(PropertyInfo(Variant::INT, "shape", PROPERTY_HINT_ENUM, "Ellipsoid (Local),Cone (Local),Cylinder (Local),Box (Local),World (Global)"), "set_shape", "get_shape");
	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "material", PROPERTY_HINT_RESOURCE_TYPE, "FogMaterial,ShaderMaterial"), "set_material", "get_material");
}

void FogVolume::_validate_property(PropertyInfo &p_property) const {
	if (p_property.name == "extents" && shape == RS::FOG_VOLUME_SHAPE_WORLD) {
		p_property.usage = PROPERTY_USAGE_NONE;
		return;
	}
}

void FogVolume::set_extents(const Vector3 &p_extents) {
	extents = p_extents;
	extents.x = MAX(0.0, extents.x);
	extents.y = MAX(0.0, extents.y);
	extents.z = MAX(0.0, extents.z);
	RS::get_singleton()->fog_volume_set_extents(_get_volume(), extents);
	update_gizmos();
}

Vector3 FogVolume::get_extents() const {
	return extents;
}

void FogVolume::set_shape(RS::FogVolumeShape p_type) {
	shape = p_type;
	RS::get_singleton()->fog_volume_set_shape(_get_volume(), shape);
	RS::get_singleton()->instance_set_ignore_culling(get_instance(), shape == RS::FOG_VOLUME_SHAPE_WORLD);
	update_gizmos();
	notify_property_list_changed();
}

RS::FogVolumeShape FogVolume::get_shape() const {
	return shape;
}

void FogVolume::set_material(const Ref<Material> &p_material) {
	material = p_material;
	RID material_rid;
	if (material.is_valid()) {
		material_rid = material->get_rid();
	}
	RS::get_singleton()->fog_volume_set_material(_get_volume(), material_rid);
	update_gizmos();
}

Ref<Material> FogVolume::get_material() const {
	return material;
}

AABB FogVolume::get_aabb() const {
	if (shape != RS::FOG_VOLUME_SHAPE_WORLD) {
		return AABB(-extents, extents * 2);
	}
	return AABB();
}

PackedStringArray FogVolume::get_configuration_warnings() const {
	PackedStringArray warnings = Node::get_configuration_warnings();

	Ref<Environment> environment = get_viewport()->find_world_3d()->get_environment();

	if (environment.is_valid() && !environment->is_volumetric_fog_enabled()) {
		warnings.push_back(("Fog Volumes need volumetric fog to be enabled in the scene's Environment in order to be visible."));
	}

	return warnings;
}

FogVolume::FogVolume() {
	volume = RS::get_singleton()->fog_volume_create();
	RS::get_singleton()->fog_volume_set_shape(volume, RS::FOG_VOLUME_SHAPE_BOX);
	set_base(volume);
}

FogVolume::~FogVolume() {
	ERR_FAIL_NULL(RenderingServer::get_singleton());
	RS::get_singleton()->free(volume);
}