/*************************************************************************/
/*  resource_importer.h                                                  */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md)    */
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/*************************************************************************/

#ifndef RESOURCE_IMPORTER_H
#define RESOURCE_IMPORTER_H

#include "core/io/resource_loader.h"

class ResourceImporter;

class ResourceFormatImporter : public ResourceFormatLoader {

	GDCLASS(ResourceFormatImporter, ResourceFormatLoader)

	struct PathAndType {
		String path;
		String type;
		String importer;
	};

	Error _get_path_and_type(const String &p_path, PathAndType &r_path_and_type, bool *r_valid = NULL) const;

	static ResourceFormatImporter *singleton;

	Vector<Ref<ResourceImporter> > importers;

public:
	static ResourceFormatImporter *get_singleton() { return singleton; }
	virtual RES load(const String &p_path, const String &p_original_path = "", Error *r_error = NULL);
	virtual void get_recognized_extensions(List<String> *p_extensions) const;
	virtual void get_recognized_extensions_for_type(const String &p_type, List<String> *p_extensions) const;
	virtual bool recognize_path(const String &p_path, const String &p_for_type = String()) const;
	virtual bool handles_type(const String &p_type) const;
	virtual String get_resource_type(const String &p_path) const;
	virtual bool is_import_valid(const String &p_path) const;
	virtual void get_dependencies(const String &p_path, List<String> *p_dependencies, bool p_add_types = false);

	virtual bool can_be_imported(const String &p_path) const;
	virtual int get_import_order(const String &p_path) const;

	String get_internal_resource_path(const String &p_path) const;
	void get_internal_resource_path_list(const String &p_path, List<String> *r_paths);

	void add_importer(const Ref<ResourceImporter> &p_importer) { importers.push_back(p_importer); }
	void remove_importer(const Ref<ResourceImporter> &p_importer) { importers.erase(p_importer); }
	Ref<ResourceImporter> get_importer_by_name(const String &p_name) const;
	Ref<ResourceImporter> get_importer_by_extension(const String &p_extension) const;
	void get_importers_for_extension(const String &p_extension, List<Ref<ResourceImporter> > *r_importers);

	String get_import_base_path(const String &p_for_file) const;
	ResourceFormatImporter();
};

class ResourceImporter : public Reference {

	GDCLASS(ResourceImporter, Reference)
public:
	virtual String get_importer_name() const = 0;
	virtual String get_visible_name() const = 0;
	virtual void get_recognized_extensions(List<String> *p_extensions) const = 0;
	virtual String get_save_extension() const = 0;
	virtual String get_resource_type() const = 0;
	virtual float get_priority() const { return 1.0; }
	virtual int get_import_order() const { return 0; }

	struct ImportOption {
		PropertyInfo option;
		Variant default_value;

		ImportOption(const PropertyInfo &p_info, const Variant &p_default) :
				option(p_info),
				default_value(p_default) {
		}
		ImportOption() {}
	};

	virtual int get_preset_count() const { return 0; }
	virtual String get_preset_name(int p_idx) const { return String(); }

	virtual void get_import_options(List<ImportOption> *r_options, int p_preset = 0) const = 0;
	virtual bool get_option_visibility(const String &p_option, const Map<StringName, Variant> &p_options) const = 0;

	virtual Error import(const String &p_source_file, const String &p_save_path, const Map<StringName, Variant> &p_options, List<String> *r_platform_variants, List<String> *r_gen_files = NULL) = 0;
};

#endif // RESOURCE_IMPORTER_H