#pragma once

#include <stdint.h>

//Unless specified otherwise, functions return -1 on error or socket closure.

//If *bufsz==0 || *buf==NULL, allocates buf newly.
//Returns line length; reallocates buf if needed.
i64 tcp_read_line(int sock,char **buf,i64 *bufsz);

i64 tcp_read_data(int sock,char *buf,i64 length);

i64 tcp_send_data(int sock,const char *buf,i64 length);
i64 tcp_send_str(int sock,const char *str);
i64 tcp_send_line(int sock,const char *str);
i64 tcp_send_line_f(int sock,const char *format,...) __attribute__((format (printf,2,3)));

i64 tcp_send_list(int sock,const char *tag,const char *const *list,i64 len);
i64 tcp_send_int(int sock,const char *tag,i64 value);


i64 tcp_read_ok(int sock,const char *tag);

typedef struct TcpList{
	i64 nitems;
	char **items;
} TcpList;

//Returns NULL on error instead of -1.
TcpList* tcp_read_list(int sock,const char *tag);
void tcp_list_destroy(TcpList *list);

typedef enum TcpResponseType{
	TCP_OK,           //-
	TCP_LIST,         //lval
	TCP_INT,          //ival
	TCP_ERROR,        //eval
	TCP_PUSH_JOIN,    //jval
	TCP_PUSH_LEAVE,   //jval
	TCP_PUSH_MESSAGE, //mval
} TcpResponseType;

typedef struct TcpResponse{
	TcpResponseType type;
	union {
		TcpList *lval;
		i64 ival;
		char *eval;
		struct {
			char *gameid,*roomid;
			i64 id;
		} jval;
		struct {
			char *gameid,*roomid;
			i64 id;
			char *message;
		} mval;
	};
} TcpResponse;

//Returns NULL on error instead of -1.
TcpResponse* tcp_read_response(int sock,const char *tag);
void tcp_response_destroy(TcpResponse *res);


//Returns the socket.
int tcp_connect(const char *hostname,int port);