#ifndef OCT_NETWORKING_H
#define OCT_NETWORKING_H

#include <sys/socket.h>
#include <lua5.3/lualib.h>
#include <netdb.h>

#define BUFFER_SIZE 1024
#define NUM_BUFFERS 10;

#define OCT_DEFAULT_PORT "20000"
// Allowed to receive up to 10 messages per iteration of the main loop
#define OCT_NETWORK_MAX_RECVS 10

// Queue stuff
// Send and recv queues are identical except in the functions that act on them, so we can use the same structure
// for both
struct oct_network_q_message {
	char addr[NI_MAXHOST];
	char port[NI_MAXSERV];
	char buffer[BUFFER_SIZE];
};

struct oct_network_q_entry {
	struct oct_network_q_message message;
	struct oct_network_q_entry* next;
	struct oct_network_q_entry* prev;
};

struct oct_network_q {
	size_t size;
	struct oct_network_q_entry* first;
	struct oct_network_q_entry* last;
};

int oct_network_q_enqueue(struct oct_network_q* q, char* addr, char* port, char* msg);
struct oct_network_q_message oct_network_q_dequeue(struct oct_network_q* q);
void oct_network_q_init(struct oct_network_q* q);
void oct_network_q_deinit(struct oct_network_q* q);

struct oct_network_ab_entry {
	int sfd;
	char addr[NI_MAXHOST];
	char port[NI_MAXSERV];
	struct oct_network_ab_entry* next;
	struct oct_network_ab_entry* prev;
};

int oct_network_node_init(char* port, lua_State* L);
void oct_network_node_deinit();

// These are heavily based off of man 3 getaddrinfo, e.g. at
// https://www.man7.org/linux/man-pages/man3/getaddrinfo.3.html
int oct_network_recv_msgs();
int oct_network_send_msgs();
int oct_network_recv_msg_lua(lua_State* L);
int oct_network_send_msg_lua(lua_State* L);
int oct_network_broadcast_msg_lua(lua_State* L);

void oct_network_ab_init();
struct oct_network_ab_entry* oct_network_ab_insert(char* addr, char* port);
int oct_network_ab_remove(struct oct_network_ab_entry* e);
struct oct_network_ab_entry* oct_network_ab_find(char* addr, char* port);
void oct_network_ab_deinit();


#endif