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

#define PORT 8080
#define SERVER_IP "127.0.0.1"
#define BUFFER_SIZE 1024

int main() {
    int sock = 0;
    struct sockaddr_in serv_addr;
    const char *hello = "Hello from TCP Client";
    char buffer[BUFFER_SIZE] = {0};

    // 1. Create socket
    if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
        printf("\n Socket creation error \n");
        return -1;
    }

    serv_addr.sin_family = AF_INET;
    serv_addr.sin_port = htons(PORT);

    // Convert IPv4 and IPv6 addresses from text to binary form
    if (inet_pton(AF_INET, SERVER_IP, &serv_addr.sin_addr) <= 0) {
        printf("\nInvalid address/ Address not supported \n");
        return -1;
    }

    // 2. Connect to server
    if (connect(sock, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0) {
        printf("\nConnection Failed \n");
        return -1;
    }

    // 3. Send data
    send(sock, hello, strlen(hello), 0);
    printf("Message sent to server: %s\n", hello);

    // 4. Receive response
    int valread = read(sock, buffer, BUFFER_SIZE);
    if (valread > 0) {
        printf("Server response: %s\n", buffer);
    }

    // 5. Close socket
    close(sock);

    return 0;
}