#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <unistd.h>

int main(void) {
    // Get TCP protocol entry
    struct protoent *pent = getprotobyname("tcp");
    if (!pent) {
        perror("getprotobyname failed");
        return EXIT_FAILURE;
    }

    // Create socket
    int server_fd = socket(AF_INET, SOCK_STREAM, pent->p_proto);
    if (server_fd < 0) {
        perror("socket failed");
        return EXIT_FAILURE;
    }

    // Set up server address structure
    struct sockaddr_in server_addr = {
        .sin_family = AF_INET,
        .sin_addr.s_addr = htonl(INADDR_ANY), // Bind to any available address
        .sin_port = htons(8080)               // Port 8080
    };

    // Bind socket
    if (bind(server_fd, (struct sockaddr *)&server_addr, sizeof(server_addr)) <
        0) {
        perror("bind failed");
        close(server_fd);
        return EXIT_FAILURE;
    }

    // Listen for incoming connections
    if (listen(server_fd, 5) < 0) {
        perror("listen failed");
        close(server_fd);
        return EXIT_FAILURE;
    }

    printf("Server listening on port 8080...\n");

    // Accept one client connection
    struct sockaddr_in client_addr;
    socklen_t client_len = sizeof(client_addr);
    int client_fd =
        accept(server_fd, (struct sockaddr *)&client_addr, &client_len);
    if (client_fd < 0) {
        perror("accept failed");
        close(server_fd);
        return EXIT_FAILURE;
    }

    printf("Client connected!\n");

    // Send a message to the client
    const char *message = "Hello from server!\n";
    send(client_fd, message, strlen(message), 0);

    // Cleanup
    close(client_fd);
    close(server_fd);

    printf("Exit\n");
    return EXIT_SUCCESS;
}