// sane_opts.h : include file for options of SANE

#pragma once


#include <string>
#include <vector>
#include <map>
#include <sane/sane_ex.h>

#define FIXED_ID_BASE	0x8000


class gb_json;

// For:		option json to SANE_Option_Descriptor*, and depends logic
//
// NOTE:	re-call method 'from_json_text' if language was changed
class sane_opt
{
	int			fix_id_;
	int			sn_;
	bool		enabled_;

	SANE_Option_Descriptor opt_desc_;

	void clear();
	void set_opt_desc_string_value(char** buf, const char* val);
	void init_cap(gb_json* jsn);
	void init_range(gb_json* jsn);

public:
	sane_opt();
	~sane_opt();

public:
	int get_fix_id(void);
	int get_sn(void);
	SANE_Option_Descriptor* get_descriptor(void);
	const char* name(void);
	bool is_enabled(void);

	bool from_json_text(int sn, const char* key, const char* json, void(*err_msg)(const char*) = nullptr);
};


class device_opts
{
	std::map<int, sane_opt*>	opts_;
	int							opt_cnt_;
	SANE_Option_Descriptor		opt_0_;


	void clear(void);
	bool add_or_replace_opt(int sn, const char* name, const char* jsn_text, void(*err_msg)(const char*));

public:
	device_opts();
	~device_opts();

public:
	bool init_from(const char* jsn_text/*all options*/, void(*err_msg)(const char*));
	SANE_Option_Descriptor* get_opt_descriptor(const void* opt, int* fix_id = nullptr);
	int get_option_count(void);
};