#include "server.h"

#include "util.h"

#include <arpa/inet.h>
#include <netinet/in.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <unistd.h>

struct _Server {
    int socket;
};

Server* make_server(const char* text_addr, uint32_t port)
{
    struct sockaddr_in addr = {
        .sin_family = AF_INET,
        .sin_port = htons(port),
    };
    if (inet_pton(AF_INET, text_addr, &addr.sin_addr) != 1) {
        log_error("bad IPv4 address: \"%s\"", text_addr);
        return NULL;
    }
    Server* server = malloc_safe(sizeof(Server));
    server->socket = socket(AF_INET, SOCK_STREAM, 0);
    if (server->socket < 0) {
        log_errno("socket");
        free(server);
        return NULL;
    }
    int on = 1;
    if (setsockopt(server->socket, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on))
        < 0) {
        log_errno("setsockopt SO_REUSEADDR");
        close(server->socket);
        free(server);
        return NULL;
    }
    if (bind(server->socket, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
        log_errno("bind");
        close(server->socket);
        free(server);
        return NULL;
    }
    if (listen(server->socket, SERVER_BACKLOG) < 0) {
        log_errno("listen");
        close(server->socket);
        free(server);
        return NULL;
    }
    return server;
}

void destroy_server(Server* server)
{
    close(server->socket);
    free(server);
}

int server_accept(Server* server)
{
    return accept(server->socket, NULL, NULL);
}