/*************************************************************************/
/*  resource_format_text.h                                               */
/*************************************************************************/
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
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#ifndef RESOURCE_FORMAT_TEXT_H
#define RESOURCE_FORMAT_TEXT_H

#include "core/io/file_access.h"
#include "core/io/resource_loader.h"
#include "core/io/resource_saver.h"
#include "core/variant/variant_parser.h"
#include "scene/resources/packed_scene.h"

class ResourceLoaderText {
	bool translation_remapped = false;
	String local_path;
	String res_path;
	String error_text;

	FileAccess *f = nullptr;

	VariantParser::StreamFile stream;

	struct ExtResource {
		RES cache;
		String path;
		String type;
	};

	bool is_scene = false;
	String res_type;

	bool ignore_resource_parsing = false;

	Map<String, ExtResource> ext_resources;
	Map<String, RES> int_resources;

	int resources_total = 0;
	int resource_current = 0;
	String resource_type;

	VariantParser::Tag next_tag;

	ResourceFormatLoader::CacheMode cache_mode = ResourceFormatLoader::CACHE_MODE_REUSE;

	bool use_sub_threads = false;
	float *progress = nullptr;

	mutable int lines = 0;

	ResourceUID::ID res_uid = ResourceUID::INVALID_ID;

	Map<String, String> remaps;

	static Error _parse_sub_resources(void *p_self, VariantParser::Stream *p_stream, Ref<Resource> &r_res, int &line, String &r_err_str) { return reinterpret_cast<ResourceLoaderText *>(p_self)->_parse_sub_resource(p_stream, r_res, line, r_err_str); }
	static Error _parse_ext_resources(void *p_self, VariantParser::Stream *p_stream, Ref<Resource> &r_res, int &line, String &r_err_str) { return reinterpret_cast<ResourceLoaderText *>(p_self)->_parse_ext_resource(p_stream, r_res, line, r_err_str); }

	Error _parse_sub_resource(VariantParser::Stream *p_stream, Ref<Resource> &r_res, int &line, String &r_err_str);
	Error _parse_ext_resource(VariantParser::Stream *p_stream, Ref<Resource> &r_res, int &line, String &r_err_str);

	// for converter
	class DummyResource : public Resource {
	public:
	};

	struct DummyReadData {
		Map<RES, int> external_resources;
		Map<String, RES> rev_external_resources;
		Map<RES, int> resource_index_map;
		Map<String, RES> resource_map;
	};

	static Error _parse_sub_resource_dummys(void *p_self, VariantParser::Stream *p_stream, Ref<Resource> &r_res, int &line, String &r_err_str) { return _parse_sub_resource_dummy((DummyReadData *)(p_self), p_stream, r_res, line, r_err_str); }
	static Error _parse_ext_resource_dummys(void *p_self, VariantParser::Stream *p_stream, Ref<Resource> &r_res, int &line, String &r_err_str) { return _parse_ext_resource_dummy((DummyReadData *)(p_self), p_stream, r_res, line, r_err_str); }

	static Error _parse_sub_resource_dummy(DummyReadData *p_data, VariantParser::Stream *p_stream, Ref<Resource> &r_res, int &line, String &r_err_str);
	static Error _parse_ext_resource_dummy(DummyReadData *p_data, VariantParser::Stream *p_stream, Ref<Resource> &r_res, int &line, String &r_err_str);

	VariantParser::ResourceParser rp;

	friend class ResourceFormatLoaderText;

	Error error = OK;

	RES resource;

	Ref<PackedScene> _parse_node_tag(VariantParser::ResourceParser &parser);

public:
	void set_local_path(const String &p_local_path);
	Ref<Resource> get_resource();
	Error load();
	int get_stage() const;
	int get_stage_count() const;
	void set_translation_remapped(bool p_remapped);

	void open(FileAccess *p_f, bool p_skip_first_tag = false);
	String recognize(FileAccess *p_f);
	ResourceUID::ID get_uid(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 save_as_binary(FileAccess *p_f, const String &p_path);
	ResourceLoaderText();
	~ResourceLoaderText();
};

class ResourceFormatLoaderText : public ResourceFormatLoader {
public:
	static ResourceFormatLoaderText *singleton;
	virtual RES load(const String &p_path, const String &p_original_path = "", Error *r_error = nullptr, bool p_use_sub_threads = false, float *r_progress = nullptr, CacheMode p_cache_mode = CACHE_MODE_REUSE);
	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 ResourceUID::ID get_resource_uid(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);

	static Error convert_file_to_binary(const String &p_src_path, const String &p_dst_path);

	ResourceFormatLoaderText() { singleton = this; }
};

class ResourceFormatSaverTextInstance {
	String local_path;

	Ref<PackedScene> packed_scene;

	bool takeover_paths = false;
	bool relative_paths = false;
	bool bundle_resources = false;
	bool skip_editor = false;
	FileAccess *f = nullptr;

	struct NonPersistentKey { //for resource properties generated on the fly
		RES base;
		StringName property;
		bool operator<(const NonPersistentKey &p_key) const { return base == p_key.base ? property < p_key.property : base < p_key.base; }
	};

	Map<NonPersistentKey, RES> non_persistent_map;

	Set<RES> resource_set;
	List<RES> saved_resources;
	Map<RES, String> external_resources;
	Map<RES, String> internal_resources;

	struct ResourceSort {
		RES resource;
		String id;
		bool operator<(const ResourceSort &p_right) const {
			return id.naturalnocasecmp_to(p_right.id) < 0;
		}
	};

	void _find_resources(const Variant &p_variant, bool p_main = false);

	static String _write_resources(void *ud, const RES &p_resource);
	String _write_resource(const RES &res);

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

class ResourceFormatSaverText : public ResourceFormatSaver {
public:
	static ResourceFormatSaverText *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;

	ResourceFormatSaverText();
};

#endif // RESOURCE_FORMAT_TEXT_H