#pragma once
#include <stddef.h>
#include <stdbool.h>
#include <stdlib.h>
#include <unistd.h>
#include <msgba/client_connection_data.h>

/**
 * The possible values for a packet id.
 */
enum {
    PACKET_GET_HELLO, //! Packet id for get hello.
    PACKET_SEND_FRAME, //! Packet id for send frame.
    PACKETS_NUMBER //! The number of recognized packets.
};

/**
 * Struct representing a generic packet.
 */
struct msPacket {
    //! The id of the packet.
    size_t id;
    //! The size of the data contained in the packet.
    size_t size; 
    //! The data as a byte array. (Not null terminated.)
    unsigned char *raw_data; 
};

/**
 * Asks the code to handle a concrete packet comming from a client.
 */
bool
msPacketHandle(struct msPacket *packet, int client_fd, struct msClientConnectionData *const data);

/**
 * Creates a new packet object.
 */
struct msPacket *
msPacketNew(const size_t id, const size_t size, unsigned char *raw_data);

/**
 * Sends the packet to the client.
 */
bool
msPacketSend(const struct msPacket *const packet, struct msClientConnectionData *const data);

/**
 * When done with a packet it must be destroyed using this method.
 */
void
msPacketDestroy(struct msPacket **packet);

/**
 * Tries to retrieve a packet from the client, returns NULL in case of error.
 * Blocks the current thread.
 */
struct msPacket *
msPacketRead(int client_fd);