/*************************************************************************/
/*  resource_format_xml.h                                                */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
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/*************************************************************************/

#ifndef RESOURCE_FORMAT_XML_H
#define RESOURCE_FORMAT_XML_H

#include "io/resource_loader.h"
#include "io/resource_saver.h"
#include "os/file_access.h"

class ResourceInteractiveLoaderXML : public ResourceInteractiveLoader {

	String local_path;
	String res_path;

	FileAccess *f;

	struct Tag {

		String name;
		HashMap<String, String> args;
	};

	_FORCE_INLINE_ Error _parse_array_element(Vector<char> &buff, bool p_number_only, FileAccess *f, bool *end);

	struct ExtResource {
		String path;
		String type;
	};

	Map<String, String> remaps;

	Map<int, ExtResource> ext_resources;

	int resources_total;
	int resource_current;
	String resource_type;

	mutable int lines;
	uint8_t get_char() const;
	int get_current_line() const;

	friend class ResourceFormatLoaderXML;
	List<Tag> tag_stack;

	List<RES> resource_cache;
	Tag *parse_tag(bool *r_exit = NULL, bool p_printerr = true, List<String> *r_order = NULL);
	Error close_tag(const String &p_name);
	_FORCE_INLINE_ void unquote(String &p_str);
	Error goto_end_of_tag();
	Error parse_property_data(String &r_data);
	Error parse_property(Variant &r_v, String &r_name, bool p_for_export_data = false);

	Error error;

	RES resource;

public:
	virtual void set_local_path(const String &p_local_path);
	virtual Ref<Resource> get_resource();
	virtual Error poll();
	virtual int get_stage() const;
	virtual int get_stage_count() const;

	void open(FileAccess *p_f);
	String recognize(FileAccess *p_f);
	void get_dependencies(FileAccess *p_f, List<String> *p_dependencies, bool p_add_types);
	Error rename_dependencies(FileAccess *p_f, const String &p_path, const Map<String, String> &p_map);

	Error get_export_data(FileAccess *p_f, ExportData &r_export_data);

	~ResourceInteractiveLoaderXML();
};

class ResourceFormatLoaderXML : public ResourceFormatLoader {
public:
	static ResourceFormatLoaderXML *singleton;
	virtual Ref<ResourceInteractiveLoader> load_interactive(const String &p_path, Error *r_error = NULL);
	virtual void get_recognized_extensions_for_type(const String &p_type, List<String> *p_extensions) const;
	virtual void get_recognized_extensions(List<String> *p_extensions) const;
	virtual bool handles_type(const String &p_type) const;
	virtual String get_resource_type(const String &p_path) const;
	virtual void get_dependencies(const String &p_path, List<String> *p_dependencies, bool p_add_types = false);
	virtual Error rename_dependencies(const String &p_path, const Map<String, String> &p_map);
	virtual Error get_export_data(const String &p_path, ExportData &r_export_data);

	ResourceFormatLoaderXML() { singleton = this; }
};

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

class ResourceFormatSaverXMLInstance {

	String local_path;

	bool takeover_paths;
	bool relative_paths;
	bool bundle_resources;
	bool skip_editor;
	FileAccess *f;
	int depth;
	Set<RES> resource_set;
	List<RES> saved_resources;
	Map<RES, int> external_resources;

	void enter_tag(const char *p_tag, const String &p_args = String());
	void exit_tag(const char *p_tag);

	void _find_resources(const Variant &p_variant, bool p_main = false);
	void write_property(const String &p_name, const Variant &p_property, bool *r_ok = NULL);

	void escape(String &p_str);
	void write_tabs(int p_diff = 0);
	void write_string(String p_str, bool p_escape = true);

public:
	Error save(const String &p_path, const RES &p_resource, uint32_t p_flags = 0);
};

class ResourceFormatSaverXML : public ResourceFormatSaver {
public:
	static ResourceFormatSaverXML *singleton;
	virtual Error save(const String &p_path, const RES &p_resource, uint32_t p_flags = 0);
	virtual bool recognize(const RES &p_resource) const;
	virtual void get_recognized_extensions(const RES &p_resource, List<String> *p_extensions) const;

	ResourceFormatSaverXML();
};

#endif // RESOURCE_FORMAT_XML_H