/*************************************************************************/
/*  resource.cpp                                                         */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2019 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 "resource.h"
#include "core_string_names.h"
#include "io/resource_loader.h"
#include "os/file_access.h"
#include <stdio.h>

void ResourceImportMetadata::set_editor(const String &p_editor) {

	editor = p_editor;
}

String ResourceImportMetadata::get_editor() const {

	return editor;
}

void ResourceImportMetadata::add_source(const String &p_path, const String &p_md5) {

	Source s;
	s.md5 = p_md5;
	s.path = p_path;
	sources.push_back(s);
}

String ResourceImportMetadata::get_source_path(int p_idx) const {
	ERR_FAIL_INDEX_V(p_idx, sources.size(), String());
	return sources[p_idx].path;
}
String ResourceImportMetadata::get_source_md5(int p_idx) const {
	ERR_FAIL_INDEX_V(p_idx, sources.size(), String());
	return sources[p_idx].md5;
}

void ResourceImportMetadata::set_source_md5(int p_idx, const String &p_md5) {

	ERR_FAIL_INDEX(p_idx, sources.size());
	sources[p_idx].md5 = p_md5;
}

void ResourceImportMetadata::remove_source(int p_idx) {

	ERR_FAIL_INDEX(p_idx, sources.size());
	sources.remove(p_idx);
}

int ResourceImportMetadata::get_source_count() const {

	return sources.size();
}
void ResourceImportMetadata::set_option(const String &p_key, const Variant &p_value) {

	if (p_value.get_type() == Variant::NIL) {
		options.erase(p_key);
		return;
	}

	ERR_FAIL_COND(p_value.get_type() == Variant::OBJECT);
	ERR_FAIL_COND(p_value.get_type() == Variant::_RID);

	options[p_key] = p_value;
}

bool ResourceImportMetadata::has_option(const String &p_key) const {

	return options.has(p_key);
}

Variant ResourceImportMetadata::get_option(const String &p_key) const {

	ERR_FAIL_COND_V(!options.has(p_key), Variant());

	return options[p_key];
}

void ResourceImportMetadata::get_options(List<String> *r_options) const {

	for (Map<String, Variant>::Element *E = options.front(); E; E = E->next()) {

		r_options->push_back(E->key());
	}
}

StringArray ResourceImportMetadata::_get_options() const {

	StringArray option_names;
	option_names.resize(options.size());
	int i = 0;
	for (Map<String, Variant>::Element *E = options.front(); E; E = E->next()) {

		option_names.set(i++, E->key());
	}

	return option_names;
}

void ResourceImportMetadata::_bind_methods() {

	ObjectTypeDB::bind_method(_MD("set_editor", "name"), &ResourceImportMetadata::set_editor);
	ObjectTypeDB::bind_method(_MD("get_editor"), &ResourceImportMetadata::get_editor);
	ObjectTypeDB::bind_method(_MD("add_source", "path", "md5"), &ResourceImportMetadata::add_source, "");
	ObjectTypeDB::bind_method(_MD("get_source_path", "idx"), &ResourceImportMetadata::get_source_path);
	ObjectTypeDB::bind_method(_MD("get_source_md5", "idx"), &ResourceImportMetadata::get_source_md5);
	ObjectTypeDB::bind_method(_MD("set_source_md5", "idx", "md5"), &ResourceImportMetadata::set_source_md5);
	ObjectTypeDB::bind_method(_MD("remove_source", "idx"), &ResourceImportMetadata::remove_source);
	ObjectTypeDB::bind_method(_MD("get_source_count"), &ResourceImportMetadata::get_source_count);
	ObjectTypeDB::bind_method(_MD("set_option", "key", "value"), &ResourceImportMetadata::set_option);
	ObjectTypeDB::bind_method(_MD("get_option", "key"), &ResourceImportMetadata::get_option);
	ObjectTypeDB::bind_method(_MD("get_options"), &ResourceImportMetadata::_get_options);
}

ResourceImportMetadata::ResourceImportMetadata() {
}

void Resource::emit_changed() {

	emit_signal(CoreStringNames::get_singleton()->changed);
}

void Resource::_resource_path_changed() {
}

void Resource::set_path(const String &p_path, bool p_take_over) {

	if (path_cache == p_path)
		return;

	if (path_cache != "") {

		ResourceCache::resources.erase(path_cache);
	}

	path_cache = "";
	if (ResourceCache::resources.has(p_path)) {
		if (p_take_over) {

			ResourceCache::resources.get(p_path)->set_name("");
		} else {
			ERR_EXPLAIN("Another resource is loaded from path: " + p_path);
			ERR_FAIL_COND(ResourceCache::resources.has(p_path));
		}
	}
	path_cache = p_path;

	if (path_cache != "") {

		ResourceCache::resources[path_cache] = this;
	}

	_change_notify("resource/path");
	_resource_path_changed();
}

String Resource::get_path() const {

	return path_cache;
}

void Resource::set_subindex(int p_sub_index) {

	subindex = p_sub_index;
}

int Resource::get_subindex() const {

	return subindex;
}

void Resource::set_name(const String &p_name) {

	name = p_name;
	_change_notify("resource/name");
}
String Resource::get_name() const {

	return name;
}

bool Resource::editor_can_reload_from_file() {

	return true; //by default yes
}

void Resource::reload_from_file() {

	String path = get_path();
	if (!path.is_resource_file())
		return;

	Ref<Resource> s = ResourceLoader::load(path, get_type(), true);

	if (!s.is_valid())
		return;

	List<PropertyInfo> pi;
	s->get_property_list(&pi);

	for (List<PropertyInfo>::Element *E = pi.front(); E; E = E->next()) {

		if (!(E->get().usage & PROPERTY_USAGE_STORAGE))
			continue;
		if (E->get().name == "resource/path")
			continue; //do not change path

		set(E->get().name, s->get(E->get().name));
	}
}

Ref<Resource> Resource::duplicate(bool p_subresources) {

	List<PropertyInfo> plist;
	get_property_list(&plist);

	Resource *r = (Resource *)ObjectTypeDB::instance(get_type());
	ERR_FAIL_COND_V(!r, Ref<Resource>());

	for (List<PropertyInfo>::Element *E = plist.front(); E; E = E->next()) {

		if (!(E->get().usage & PROPERTY_USAGE_STORAGE))
			continue;
		Variant p = get(E->get().name);
		if (p.get_type() == Variant::OBJECT && p_subresources) {

			RES sr = p;
			if (sr.is_valid())
				p = sr->duplicate(true);
		}

		r->set(E->get().name, p);
	}

	return Ref<Resource>(r);
}

void Resource::_set_path(const String &p_path) {

	set_path(p_path, false);
}

void Resource::_take_over_path(const String &p_path) {

	set_path(p_path, true);
}

void Resource::_bind_methods() {

	ObjectTypeDB::bind_method(_MD("set_path", "path"), &Resource::_set_path);
	ObjectTypeDB::bind_method(_MD("take_over_path", "path"), &Resource::_take_over_path);
	ObjectTypeDB::bind_method(_MD("get_path"), &Resource::get_path);
	ObjectTypeDB::bind_method(_MD("set_name", "name"), &Resource::set_name);
	ObjectTypeDB::bind_method(_MD("get_name"), &Resource::get_name);
	ObjectTypeDB::bind_method(_MD("get_rid"), &Resource::get_rid);
	ObjectTypeDB::bind_method(_MD("set_import_metadata", "metadata"), &Resource::set_import_metadata);
	ObjectTypeDB::bind_method(_MD("get_import_metadata"), &Resource::get_import_metadata);

	ObjectTypeDB::bind_method(_MD("duplicate", "subresources"), &Resource::duplicate, DEFVAL(false));
	ADD_SIGNAL(MethodInfo("changed"));
	ADD_PROPERTY(PropertyInfo(Variant::STRING, "resource/path", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_EDITOR), _SCS("set_path"), _SCS("get_path"));
	ADD_PROPERTYNZ(PropertyInfo(Variant::STRING, "resource/name"), _SCS("set_name"), _SCS("get_name"));
}

RID Resource::get_rid() const {

	return RID();
}

void Resource::register_owner(Object *p_owner) {

	owners.insert(p_owner->get_instance_ID());
}

void Resource::unregister_owner(Object *p_owner) {

	owners.erase(p_owner->get_instance_ID());
}

void Resource::notify_change_to_owners() {

	for (Set<ObjectID>::Element *E = owners.front(); E; E = E->next()) {

		Object *obj = ObjectDB::get_instance(E->get());
		ERR_EXPLAIN("Object was deleted, while still owning a resource");
		ERR_CONTINUE(!obj); //wtf
		//TODO store string
		obj->call("resource_changed", RES(this));
	}
}

void Resource::set_import_metadata(const Ref<ResourceImportMetadata> &p_metadata) {
#ifdef TOOLS_ENABLED
	import_metadata = p_metadata;
#endif
}

Ref<ResourceImportMetadata> Resource::get_import_metadata() const {

#ifdef TOOLS_ENABLED
	return import_metadata;
#else
	return Ref<ResourceImportMetadata>();
#endif
}

#ifdef TOOLS_ENABLED

uint32_t Resource::hash_edited_version() const {

	uint32_t hash = hash_djb2_one_32(get_edited_version());

	List<PropertyInfo> plist;
	get_property_list(&plist);

	for (List<PropertyInfo>::Element *E = plist.front(); E; E = E->next()) {

		if (E->get().type == Variant::OBJECT && E->get().hint == PROPERTY_HINT_RESOURCE_TYPE) {
			RES res = get(E->get().name);
			if (res.is_valid()) {
				hash = hash_djb2_one_32(res->hash_edited_version(), hash);
			}
		}
	}

	return hash;
}

#endif

Resource::Resource() {

#ifdef TOOLS_ENABLED
	last_modified_time = 0;
#endif

	subindex = 0;
}

Resource::~Resource() {

	if (path_cache != "")
		ResourceCache::resources.erase(path_cache);
	if (owners.size()) {
		WARN_PRINT("Resource is still owned");
	}
}

HashMap<String, Resource *> ResourceCache::resources;

void ResourceCache::clear() {
	if (resources.size())
		ERR_PRINT("Resources Still in use at Exit!");

	resources.clear();
}

void ResourceCache::reload_externals() {

	GLOBAL_LOCK_FUNCTION

	//const String *K=NULL;
	//while ((K=resources.next(K))) {
	//		resources[*K]->reload_external_data();
	//	}
}

bool ResourceCache::has(const String &p_path) {

	GLOBAL_LOCK_FUNCTION

	return resources.has(p_path);
}
Resource *ResourceCache::get(const String &p_path) {

	GLOBAL_LOCK_FUNCTION

	Resource **res = resources.getptr(p_path);
	if (!res) {
		return NULL;
	}

	return *res;
}

void ResourceCache::get_cached_resources(List<Ref<Resource> > *p_resources) {

	const String *K = NULL;
	while ((K = resources.next(K))) {

		Resource *r = resources[*K];
		p_resources->push_back(Ref<Resource>(r));
	}
}

int ResourceCache::get_cached_resource_count() {

	return resources.size();
}

void ResourceCache::dump(const char *p_file, bool p_short) {
#ifdef DEBUG_ENABLED
	GLOBAL_LOCK_FUNCTION

	Map<String, int> type_count;

	FileAccess *f = NULL;
	if (p_file) {
		f = FileAccess::open(p_file, FileAccess::WRITE);
		ERR_FAIL_COND(!f);
	}

	const String *K = NULL;
	while ((K = resources.next(K))) {

		Resource *r = resources[*K];

		if (!type_count.has(r->get_type())) {
			type_count[r->get_type()] = 0;
		}

		type_count[r->get_type()]++;

		if (!p_short) {
			if (f)
				f->store_line(r->get_type() + ": " + r->get_path());
		}
	}

	for (Map<String, int>::Element *E = type_count.front(); E; E = E->next()) {

		if (f)
			f->store_line(E->key() + " count: " + itos(E->get()));
	}
	if (f) {
		f->close();
		memdelete(f);
	}

#endif
}