/*************************************************************************/
/*  websocket_peer.h                                                     */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
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/*************************************************************************/

#ifndef WEBSOCKET_PEER_H
#define WEBSOCKET_PEER_H

#include "core/crypto/crypto.h"
#include "core/error/error_list.h"
#include "core/io/packet_peer.h"

class WebSocketPeer : public PacketPeer {
	GDCLASS(WebSocketPeer, PacketPeer);

public:
	enum State {
		STATE_CONNECTING,
		STATE_OPEN,
		STATE_CLOSING,
		STATE_CLOSED
	};

	enum WriteMode {
		WRITE_MODE_TEXT,
		WRITE_MODE_BINARY,
	};

	enum {
		DEFAULT_BUFFER_SIZE = 65535,
	};

private:
	virtual Error _send_bind(const PackedByteArray &p_data, WriteMode p_mode = WRITE_MODE_BINARY);

protected:
	static WebSocketPeer *(*_create)();

	static void _bind_methods();

	Vector<String> supported_protocols;
	Vector<String> handshake_headers;

	Vector<String> _get_supported_protocols() const;
	Vector<String> _get_handshake_headers() const;

	int outbound_buffer_size = DEFAULT_BUFFER_SIZE;
	int inbound_buffer_size = DEFAULT_BUFFER_SIZE;
	int max_queued_packets = 2048;

public:
	static WebSocketPeer *create() {
		if (!_create) {
			return nullptr;
		}
		return _create();
	}

	virtual Error connect_to_url(const String &p_url, bool p_verify_tls = true, Ref<X509Certificate> p_cert = Ref<X509Certificate>()) { return ERR_UNAVAILABLE; };
	virtual Error accept_stream(Ref<StreamPeer> p_stream) = 0;

	virtual Error send(const uint8_t *p_buffer, int p_buffer_size, WriteMode p_mode) = 0;
	virtual void close(int p_code = 1000, String p_reason = "") = 0;

	virtual IPAddress get_connected_host() const = 0;
	virtual uint16_t get_connected_port() const = 0;
	virtual bool was_string_packet() const = 0;
	virtual void set_no_delay(bool p_enabled) = 0;
	virtual int get_current_outbound_buffered_amount() const = 0;
	virtual String get_selected_protocol() const = 0;
	virtual String get_requested_url() const = 0;

	virtual void poll() = 0;
	virtual State get_ready_state() const = 0;
	virtual int get_close_code() const = 0;
	virtual String get_close_reason() const = 0;

	Error send_text(const String &p_text);

	void set_supported_protocols(const Vector<String> &p_protocols);
	const Vector<String> get_supported_protocols() const;

	void set_handshake_headers(const Vector<String> &p_headers);
	const Vector<String> get_handshake_headers() const;

	void set_outbound_buffer_size(int p_buffer_size);
	int get_outbound_buffer_size() const;

	void set_inbound_buffer_size(int p_buffer_size);
	int get_inbound_buffer_size() const;

	void set_max_queued_packets(int p_max_queued_packets);
	int get_max_queued_packets() const;

	WebSocketPeer();
	~WebSocketPeer();
};

VARIANT_ENUM_CAST(WebSocketPeer::WriteMode);
VARIANT_ENUM_CAST(WebSocketPeer::State);

#endif // WEBSOCKET_PEER_H