/*************************************************************************/
/*  stream_peer.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 STREAM_PEER_H
#define STREAM_PEER_H

#include "core/object/ref_counted.h"

#include "core/extension/ext_wrappers.gen.inc"
#include "core/object/gdvirtual.gen.inc"
#include "core/object/script_language.h"
#include "core/variant/native_ptr.h"

class StreamPeer : public RefCounted {
	GDCLASS(StreamPeer, RefCounted);

protected:
	static void _bind_methods();

	//bind helpers
	Error _put_data(const Vector<uint8_t> &p_data);
	Array _put_partial_data(const Vector<uint8_t> &p_data);

	Array _get_data(int p_bytes);
	Array _get_partial_data(int p_bytes);

	bool big_endian = false;

public:
	virtual Error put_data(const uint8_t *p_data, int p_bytes) = 0; ///< put a whole chunk of data, blocking until it sent
	virtual Error put_partial_data(const uint8_t *p_data, int p_bytes, int &r_sent) = 0; ///< put as much data as possible, without blocking.

	virtual Error get_data(uint8_t *p_buffer, int p_bytes) = 0; ///< read p_bytes of data, if p_bytes > available, it will block
	virtual Error get_partial_data(uint8_t *p_buffer, int p_bytes, int &r_received) = 0; ///< read as much data as p_bytes into buffer, if less was read, return in r_received

	virtual int get_available_bytes() const = 0;

	/* helpers */
	void set_big_endian(bool p_big_endian);
	bool is_big_endian_enabled() const;

	void put_8(int8_t p_val);
	void put_u8(uint8_t p_val);
	void put_16(int16_t p_val);
	void put_u16(uint16_t p_val);
	void put_32(int32_t p_val);
	void put_u32(uint32_t p_val);
	void put_64(int64_t p_val);
	void put_u64(uint64_t p_val);
	void put_float(float p_val);
	void put_double(double p_val);
	void put_string(const String &p_string);
	void put_utf8_string(const String &p_string);
	void put_var(const Variant &p_variant, bool p_full_objects = false);

	uint8_t get_u8();
	int8_t get_8();
	uint16_t get_u16();
	int16_t get_16();
	uint32_t get_u32();
	int32_t get_32();
	uint64_t get_u64();
	int64_t get_64();
	float get_float();
	double get_double();
	String get_string(int p_bytes = -1);
	String get_utf8_string(int p_bytes = -1);
	Variant get_var(bool p_allow_objects = false);

	StreamPeer() {}
};

class StreamPeerExtension : public StreamPeer {
	GDCLASS(StreamPeerExtension, StreamPeer);

protected:
	static void _bind_methods();

public:
	virtual Error put_data(const uint8_t *p_data, int p_bytes) override;
	GDVIRTUAL3R(Error, _put_data, GDExtensionConstPtr<const uint8_t>, int, GDExtensionPtr<int>);

	virtual Error put_partial_data(const uint8_t *p_data, int p_bytes, int &r_sent) override;
	GDVIRTUAL3R(Error, _put_partial_data, GDExtensionConstPtr<const uint8_t>, int, GDExtensionPtr<int>);

	virtual Error get_data(uint8_t *p_buffer, int p_bytes) override;
	GDVIRTUAL3R(Error, _get_data, GDExtensionPtr<uint8_t>, int, GDExtensionPtr<int>);

	virtual Error get_partial_data(uint8_t *p_buffer, int p_bytes, int &r_received) override;
	GDVIRTUAL3R(Error, _get_partial_data, GDExtensionPtr<uint8_t>, int, GDExtensionPtr<int>);

	EXBIND0RC(int, get_available_bytes);
};

class StreamPeerBuffer : public StreamPeer {
	GDCLASS(StreamPeerBuffer, StreamPeer);

	Vector<uint8_t> data;
	int pointer = 0;

protected:
	static void _bind_methods();

public:
	Error put_data(const uint8_t *p_data, int p_bytes) override;
	Error put_partial_data(const uint8_t *p_data, int p_bytes, int &r_sent) override;

	Error get_data(uint8_t *p_buffer, int p_bytes) override;
	Error get_partial_data(uint8_t *p_buffer, int p_bytes, int &r_received) override;

	virtual int get_available_bytes() const override;

	void seek(int p_pos);
	int get_size() const;
	int get_position() const;
	void resize(int p_size);

	void set_data_array(const Vector<uint8_t> &p_data);
	Vector<uint8_t> get_data_array() const;

	void clear();

	Ref<StreamPeerBuffer> duplicate() const;

	StreamPeerBuffer() {}
};

#endif // STREAM_PEER_H