/*************************************************************************/
/*  resource.h                                                           */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2020 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.                */
/*************************************************************************/

#ifndef RESOURCE_H
#define RESOURCE_H

#include "object.h"
#include "object_type_db.h"
#include "ref_ptr.h"
#include "reference.h"
#include "safe_refcount.h"

/**
	@author Juan Linietsky <reduzio@gmail.com>
*/

#define RES_BASE_EXTENSION(m_ext)                                                                                       \
public:                                                                                                                 \
	static void register_custom_data_to_otdb() { ObjectTypeDB::add_resource_base_extension(m_ext, get_type_static()); } \
	virtual String get_base_extension() const { return m_ext; }                                                         \
                                                                                                                        \
private:

class ResourceImportMetadata : public Reference {

	OBJ_TYPE(ResourceImportMetadata, Reference);

	struct Source {
		String path;
		String md5;
	};

	Vector<Source> sources;
	String editor;

	Map<String, Variant> options;

	StringArray _get_options() const;

protected:
	virtual bool _use_builtin_script() const { return false; }
	static void _bind_methods();

public:
	void set_editor(const String &p_editor);
	String get_editor() const;

	void add_source(const String &p_path, const String &p_md5 = "");
	String get_source_path(int p_idx) const;
	String get_source_md5(int p_idx) const;
	void set_source_md5(int p_idx, const String &p_md5);
	void remove_source(int p_idx);
	int get_source_count() const;

	void set_option(const String &p_key, const Variant &p_value);
	Variant get_option(const String &p_key) const;
	bool has_option(const String &p_key) const;

	void get_options(List<String> *r_options) const;

	ResourceImportMetadata();
};

class Resource : public Reference {

	OBJ_TYPE(Resource, Reference);
	OBJ_CATEGORY("Resources");
	RES_BASE_EXTENSION("res");

	Set<ObjectID> owners;

	friend class ResBase;
	friend class ResourceCache;

	String name;
	String path_cache;
	int subindex;

	virtual bool _use_builtin_script() const { return true; }

#ifdef TOOLS_ENABLED
	Ref<ResourceImportMetadata> import_metadata;
	uint64_t last_modified_time;
#endif

protected:
	void emit_changed();

	void notify_change_to_owners();

	virtual void _resource_path_changed();
	static void _bind_methods();

	void _set_path(const String &p_path);
	void _take_over_path(const String &p_path);

public:
	virtual bool editor_can_reload_from_file();
	virtual void reload_from_file();

	void register_owner(Object *p_owner);
	void unregister_owner(Object *p_owner);

	void set_name(const String &p_name);
	String get_name() const;

	virtual void set_path(const String &p_path, bool p_take_over = false);
	String get_path() const;

	void set_subindex(int p_sub_index);
	int get_subindex() const;

	Ref<Resource> duplicate(bool p_subresources = false);

	void set_import_metadata(const Ref<ResourceImportMetadata> &p_metadata);
	Ref<ResourceImportMetadata> get_import_metadata() const;

#ifdef TOOLS_ENABLED

	uint32_t hash_edited_version() const;

	virtual void set_last_modified_time(uint64_t p_time) { last_modified_time = p_time; }
	uint64_t get_last_modified_time() const { return last_modified_time; }

#endif

	virtual RID get_rid() const; // some resources may offer conversion to RID

	Resource();
	~Resource();
};

typedef Ref<Resource> RES;

class ResourceCache {
	friend class Resource;
	static HashMap<String, Resource *> resources;
	friend void unregister_core_types();
	static void clear();

public:
	static void reload_externals();
	static bool has(const String &p_path);
	static Resource *get(const String &p_path);
	static void dump(const char *p_file = NULL, bool p_short = false);
	static void get_cached_resources(List<Ref<Resource> > *p_resources);
	static int get_cached_resource_count();
};

#endif