/*************************************************************************/
/*  visual_instance.cpp                                                  */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md)    */
/*                                                                       */
/* 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 "visual_instance.h"

#include "baked_light_instance.h"
#include "room_instance.h"
#include "scene/scene_string_names.h"
#include "servers/visual_server.h"
#include "skeleton.h"

AABB VisualInstance::get_transformed_aabb() const {

	return get_global_transform().xform(get_aabb());
}

void VisualInstance::_notification(int p_what) {

	switch (p_what) {

		case NOTIFICATION_ENTER_WORLD: {

			// CHECK ROOM
			Spatial *parent = get_parent_spatial();
			Room *room = NULL;
			bool is_geom = cast_to<GeometryInstance>();

			while (parent) {

				room = parent->cast_to<Room>();
				if (room)
					break;

				if (is_geom && parent->cast_to<BakedLightSampler>()) {
					VS::get_singleton()->instance_geometry_set_baked_light_sampler(get_instance(), parent->cast_to<BakedLightSampler>()->get_instance());
					break;
				}

				parent = parent->get_parent_spatial();
			}

			if (room) {

				VisualServer::get_singleton()->instance_set_room(instance, room->get_instance());
			}
			// CHECK SKELETON => moving skeleton attaching logic to MeshInstance
			/*
			Skeleton *skeleton=get_parent()?get_parent()->cast_to<Skeleton>():NULL;
			if (skeleton)
				VisualServer::get_singleton()->instance_attach_skeleton( instance, skeleton->get_skeleton() );
			*/

			VisualServer::get_singleton()->instance_set_scenario(instance, get_world()->get_scenario());

		} break;
		case NOTIFICATION_TRANSFORM_CHANGED: {

			Transform gt = get_global_transform();
			VisualServer::get_singleton()->instance_set_transform(instance, gt);
		} break;
		case NOTIFICATION_EXIT_WORLD: {

			VisualServer::get_singleton()->instance_set_scenario(instance, RID());
			VisualServer::get_singleton()->instance_set_room(instance, RID());
			VisualServer::get_singleton()->instance_attach_skeleton(instance, RID());
			VS::get_singleton()->instance_geometry_set_baked_light_sampler(instance, RID());

		} break;
	}
}

RID VisualInstance::get_instance() const {

	return instance;
}

RID VisualInstance::_get_visual_instance_rid() const {

	return instance;
}

void VisualInstance::set_layer_mask(uint32_t p_mask) {

	layers = p_mask;
	VisualServer::get_singleton()->instance_set_layer_mask(instance, p_mask);
}

uint32_t VisualInstance::get_layer_mask() const {

	return layers;
}

void VisualInstance::_bind_methods() {

	ObjectTypeDB::bind_method(_MD("_get_visual_instance_rid"), &VisualInstance::_get_visual_instance_rid);
	ObjectTypeDB::bind_method(_MD("set_base", "base"), &VisualInstance::set_base);
	ObjectTypeDB::bind_method(_MD("set_layer_mask", "mask"), &VisualInstance::set_layer_mask);
	ObjectTypeDB::bind_method(_MD("get_layer_mask"), &VisualInstance::get_layer_mask);

	ObjectTypeDB::bind_method(_MD("get_transformed_aabb"), &VisualInstance::get_transformed_aabb);

	ADD_PROPERTY(PropertyInfo(Variant::INT, "layers", PROPERTY_HINT_ALL_FLAGS), _SCS("set_layer_mask"), _SCS("get_layer_mask"));
}

void VisualInstance::set_base(const RID &p_base) {

	VisualServer::get_singleton()->instance_set_base(instance, p_base);
}

VisualInstance::VisualInstance() {

	instance = VisualServer::get_singleton()->instance_create();
	VisualServer::get_singleton()->instance_attach_object_instance_ID(instance, get_instance_ID());
	layers = 1;
}

VisualInstance::~VisualInstance() {

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

void GeometryInstance::set_material_override(const Ref<Material> &p_material) {

	material_override = p_material;
	VS::get_singleton()->instance_geometry_set_material_override(get_instance(), p_material.is_valid() ? p_material->get_rid() : RID());
}

Ref<Material> GeometryInstance::get_material_override() const {

	return material_override;
}

void GeometryInstance::set_draw_range_begin(float p_dist) {

	draw_begin = p_dist;
	VS::get_singleton()->instance_geometry_set_draw_range(get_instance(), draw_begin, draw_end);
}

float GeometryInstance::get_draw_range_begin() const {

	return draw_begin;
}

void GeometryInstance::set_draw_range_end(float p_dist) {

	draw_end = p_dist;
	VS::get_singleton()->instance_geometry_set_draw_range(get_instance(), draw_begin, draw_end);
}

float GeometryInstance::get_draw_range_end() const {

	return draw_end;
}

void GeometryInstance::_notification(int p_what) {

	if (p_what == NOTIFICATION_ENTER_WORLD) {

		if (flags[FLAG_USE_BAKED_LIGHT]) {

			_find_baked_light();
		}

		_update_visibility();

	} else if (p_what == NOTIFICATION_EXIT_WORLD) {

		if (flags[FLAG_USE_BAKED_LIGHT]) {

			if (baked_light_instance) {
				baked_light_instance->disconnect(SceneStringNames::get_singleton()->baked_light_changed, this, SceneStringNames::get_singleton()->_baked_light_changed);
				baked_light_instance = NULL;
			}
			_baked_light_changed();
		}
	}
	if (p_what == NOTIFICATION_VISIBILITY_CHANGED) {

		_update_visibility();
	}
}

void GeometryInstance::_baked_light_changed() {

	if (!baked_light_instance)
		VS::get_singleton()->instance_geometry_set_baked_light(get_instance(), RID());
	else
		VS::get_singleton()->instance_geometry_set_baked_light(get_instance(), baked_light_instance->get_baked_light_instance());
}

void GeometryInstance::_find_baked_light() {

	Node *n = get_parent();
	while (n) {

		BakedLightInstance *bl = n->cast_to<BakedLightInstance>();
		if (bl) {

			baked_light_instance = bl;
			baked_light_instance->connect(SceneStringNames::get_singleton()->baked_light_changed, this, SceneStringNames::get_singleton()->_baked_light_changed);
			_baked_light_changed();

			return;
		}

		n = n->get_parent();
	}

	_baked_light_changed();
}

void GeometryInstance::_update_visibility() {

	if (!is_inside_tree())
		return;

	_change_notify("geometry/visible");
	VS::get_singleton()->instance_geometry_set_flag(get_instance(), VS::INSTANCE_FLAG_VISIBLE, is_visible() && flags[FLAG_VISIBLE]);
}

void GeometryInstance::set_flag(Flags p_flag, bool p_value) {

	ERR_FAIL_INDEX(p_flag, FLAG_MAX);
	if (p_flag == FLAG_CAST_SHADOW) {
		if (p_value == true) {
			set_cast_shadows_setting(SHADOW_CASTING_SETTING_ON);
		} else {
			set_cast_shadows_setting(SHADOW_CASTING_SETTING_OFF);
		}
	}

	if (flags[p_flag] == p_value)
		return;

	flags[p_flag] = p_value;
	VS::get_singleton()->instance_geometry_set_flag(get_instance(), (VS::InstanceFlags)p_flag, p_value);
	if (p_flag == FLAG_VISIBLE) {
		_update_visibility();
	}
	if (p_flag == FLAG_USE_BAKED_LIGHT) {

		if (is_inside_world()) {
			if (!p_value) {
				if (baked_light_instance) {
					baked_light_instance->disconnect(SceneStringNames::get_singleton()->baked_light_changed, this, SceneStringNames::get_singleton()->_baked_light_changed);
					baked_light_instance = NULL;
				}
				_baked_light_changed();
			} else {
				_find_baked_light();
			}
		}
	}
}

bool GeometryInstance::get_flag(Flags p_flag) const {

	ERR_FAIL_INDEX_V(p_flag, FLAG_MAX, false);

	if (p_flag == FLAG_CAST_SHADOW) {
		if (shadow_casting_setting == SHADOW_CASTING_SETTING_OFF) {
			return false;
		} else {
			return true;
		}
	}

	return flags[p_flag];
}

void GeometryInstance::set_cast_shadows_setting(ShadowCastingSetting p_shadow_casting_setting) {

	shadow_casting_setting = p_shadow_casting_setting;

	VS::get_singleton()->instance_geometry_set_cast_shadows_setting(get_instance(), (VS::ShadowCastingSetting)p_shadow_casting_setting);
}

GeometryInstance::ShadowCastingSetting GeometryInstance::get_cast_shadows_setting() const {

	return shadow_casting_setting;
}

void GeometryInstance::set_baked_light_texture_id(int p_id) {

	baked_light_texture_id = p_id;
	VS::get_singleton()->instance_geometry_set_baked_light_texture_index(get_instance(), baked_light_texture_id);
}

int GeometryInstance::get_baked_light_texture_id() const {

	return baked_light_texture_id;
}

void GeometryInstance::set_extra_cull_margin(float p_margin) {

	ERR_FAIL_COND(p_margin < 0);
	extra_cull_margin = p_margin;
	VS::get_singleton()->instance_set_extra_visibility_margin(get_instance(), extra_cull_margin);
}

float GeometryInstance::get_extra_cull_margin() const {

	return extra_cull_margin;
}

void GeometryInstance::_bind_methods() {

	ObjectTypeDB::bind_method(_MD("set_material_override", "material"), &GeometryInstance::set_material_override);
	ObjectTypeDB::bind_method(_MD("get_material_override"), &GeometryInstance::get_material_override);

	ObjectTypeDB::bind_method(_MD("set_flag", "flag", "value"), &GeometryInstance::set_flag);
	ObjectTypeDB::bind_method(_MD("get_flag", "flag"), &GeometryInstance::get_flag);

	ObjectTypeDB::bind_method(_MD("set_cast_shadows_setting", "shadow_casting_setting"), &GeometryInstance::set_cast_shadows_setting);
	ObjectTypeDB::bind_method(_MD("get_cast_shadows_setting"), &GeometryInstance::get_cast_shadows_setting);

	ObjectTypeDB::bind_method(_MD("set_draw_range_begin", "mode"), &GeometryInstance::set_draw_range_begin);
	ObjectTypeDB::bind_method(_MD("get_draw_range_begin"), &GeometryInstance::get_draw_range_begin);

	ObjectTypeDB::bind_method(_MD("set_draw_range_end", "mode"), &GeometryInstance::set_draw_range_end);
	ObjectTypeDB::bind_method(_MD("get_draw_range_end"), &GeometryInstance::get_draw_range_end);

	ObjectTypeDB::bind_method(_MD("set_baked_light_texture_id", "id"), &GeometryInstance::set_baked_light_texture_id);
	ObjectTypeDB::bind_method(_MD("get_baked_light_texture_id"), &GeometryInstance::get_baked_light_texture_id);

	ObjectTypeDB::bind_method(_MD("set_extra_cull_margin", "margin"), &GeometryInstance::set_extra_cull_margin);
	ObjectTypeDB::bind_method(_MD("get_extra_cull_margin"), &GeometryInstance::get_extra_cull_margin);

	ObjectTypeDB::bind_method(_MD("get_aabb"), &GeometryInstance::get_aabb);

	ObjectTypeDB::bind_method(_MD("_baked_light_changed"), &GeometryInstance::_baked_light_changed);

	ADD_PROPERTYI(PropertyInfo(Variant::BOOL, "geometry/visible"), _SCS("set_flag"), _SCS("get_flag"), FLAG_VISIBLE);
	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "geometry/material_override", PROPERTY_HINT_RESOURCE_TYPE, "Material"), _SCS("set_material_override"), _SCS("get_material_override"));
	ADD_PROPERTY(PropertyInfo(Variant::INT, "geometry/cast_shadow", PROPERTY_HINT_ENUM, "Off,On,Double-Sided,Shadows Only"), _SCS("set_cast_shadows_setting"), _SCS("get_cast_shadows_setting"));
	ADD_PROPERTYI(PropertyInfo(Variant::BOOL, "geometry/receive_shadows"), _SCS("set_flag"), _SCS("get_flag"), FLAG_RECEIVE_SHADOWS);
	ADD_PROPERTY(PropertyInfo(Variant::INT, "geometry/range_begin", PROPERTY_HINT_RANGE, "0,32768,0.01"), _SCS("set_draw_range_begin"), _SCS("get_draw_range_begin"));
	ADD_PROPERTY(PropertyInfo(Variant::INT, "geometry/range_end", PROPERTY_HINT_RANGE, "0,32768,0.01"), _SCS("set_draw_range_end"), _SCS("get_draw_range_end"));
	ADD_PROPERTY(PropertyInfo(Variant::REAL, "geometry/extra_cull_margin", PROPERTY_HINT_RANGE, "0,16384,0"), _SCS("set_extra_cull_margin"), _SCS("get_extra_cull_margin"));
	ADD_PROPERTYI(PropertyInfo(Variant::BOOL, "geometry/billboard"), _SCS("set_flag"), _SCS("get_flag"), FLAG_BILLBOARD);
	ADD_PROPERTYI(PropertyInfo(Variant::BOOL, "geometry/billboard_y"), _SCS("set_flag"), _SCS("get_flag"), FLAG_BILLBOARD_FIX_Y);
	ADD_PROPERTYI(PropertyInfo(Variant::BOOL, "geometry/depth_scale"), _SCS("set_flag"), _SCS("get_flag"), FLAG_DEPH_SCALE);
	ADD_PROPERTYI(PropertyInfo(Variant::BOOL, "geometry/visible_in_all_rooms"), _SCS("set_flag"), _SCS("get_flag"), FLAG_VISIBLE_IN_ALL_ROOMS);
	ADD_PROPERTYI(PropertyInfo(Variant::BOOL, "geometry/use_baked_light"), _SCS("set_flag"), _SCS("get_flag"), FLAG_USE_BAKED_LIGHT);
	ADD_PROPERTY(PropertyInfo(Variant::INT, "geometry/baked_light_tex_id"), _SCS("set_baked_light_texture_id"), _SCS("get_baked_light_texture_id"));

	//	ADD_SIGNAL( MethodInfo("visibility_changed"));

	BIND_CONSTANT(FLAG_VISIBLE);
	BIND_CONSTANT(FLAG_CAST_SHADOW);
	BIND_CONSTANT(FLAG_RECEIVE_SHADOWS);
	BIND_CONSTANT(FLAG_BILLBOARD);
	BIND_CONSTANT(FLAG_BILLBOARD_FIX_Y);
	BIND_CONSTANT(FLAG_DEPH_SCALE);
	BIND_CONSTANT(FLAG_VISIBLE_IN_ALL_ROOMS);
	BIND_CONSTANT(FLAG_MAX);

	BIND_CONSTANT(SHADOW_CASTING_SETTING_OFF);
	BIND_CONSTANT(SHADOW_CASTING_SETTING_ON);
	BIND_CONSTANT(SHADOW_CASTING_SETTING_DOUBLE_SIDED);
	BIND_CONSTANT(SHADOW_CASTING_SETTING_SHADOWS_ONLY);
}

GeometryInstance::GeometryInstance() {
	draw_begin = 0;
	draw_end = 0;
	for (int i = 0; i < FLAG_MAX; i++) {
		flags[i] = false;
	}

	flags[FLAG_VISIBLE] = true;
	flags[FLAG_CAST_SHADOW] = true;
	flags[FLAG_RECEIVE_SHADOWS] = true;
	shadow_casting_setting = SHADOW_CASTING_SETTING_ON;
	baked_light_instance = NULL;
	baked_light_texture_id = 0;
	extra_cull_margin = 0;
	VS::get_singleton()->instance_geometry_set_baked_light_texture_index(get_instance(), 0);
}