/*************************************************************************/
/*  ip.h                                                                 */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
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/*************************************************************************/

#ifndef IP_H
#define IP_H

#include "core/io/ip_address.h"
#include "core/os/os.h"

struct _IP_ResolverPrivate;

class IP : public Object {
	GDCLASS(IP, Object);

public:
	enum ResolverStatus {
		RESOLVER_STATUS_NONE,
		RESOLVER_STATUS_WAITING,
		RESOLVER_STATUS_DONE,
		RESOLVER_STATUS_ERROR,
	};

	enum Type {
		TYPE_NONE = 0,
		TYPE_IPV4 = 1,
		TYPE_IPV6 = 2,
		TYPE_ANY = 3,
	};

	enum {
		RESOLVER_MAX_QUERIES = 256,
		RESOLVER_INVALID_ID = -1
	};

	typedef int ResolverID;

private:
	_IP_ResolverPrivate *resolver = nullptr;

protected:
	static IP *singleton;
	static void _bind_methods();

	Array _get_local_addresses() const;
	Array _get_local_interfaces() const;

	static IP *(*_create)();

public:
	struct Interface_Info {
		String name;
		String name_friendly;
		String index;
		List<IPAddress> ip_addresses;
	};

	IPAddress resolve_hostname(const String &p_hostname, Type p_type = TYPE_ANY);
	Array resolve_hostname_addresses(const String &p_hostname, Type p_type = TYPE_ANY);
	// async resolver hostname
	ResolverID resolve_hostname_queue_item(const String &p_hostname, Type p_type = TYPE_ANY);
	ResolverStatus get_resolve_item_status(ResolverID p_id) const;
	IPAddress get_resolve_item_address(ResolverID p_id) const;
	virtual void get_local_addresses(List<IPAddress> *r_addresses) const;

	virtual void _resolve_hostname(List<IPAddress> &r_addresses, const String &p_hostname, Type p_type = TYPE_ANY) const = 0;
	Array get_resolve_item_addresses(ResolverID p_id) const;

	virtual void get_local_interfaces(HashMap<String, Interface_Info> *r_interfaces) const = 0;
	void erase_resolve_item(ResolverID p_id);

	void clear_cache(const String &p_hostname = "");

	static IP *get_singleton();

	static IP *create();

	IP();
	~IP();
};

VARIANT_ENUM_CAST(IP::Type);

#endif // IP_H