// client.c (debug version)
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <netinet/tcp.h>

#define PORT 5000

int main() {
    int sock;
    struct sockaddr_in serv_addr;
    int opt = 1;
    char buffer[1024];

    sock = socket(AF_INET, SOCK_STREAM, 0);
    if (sock < 0) { perror("socket creation failed"); return -1; }

    if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof(opt)) < 0)
        perror("setsockopt TCP_NODELAY failed");

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

    // 👉 Change this IP if server is in another VM
    if (inet_pton(AF_INET, "192.168.2.1", &serv_addr.sin_addr) <= 0) {
        perror("invalid address");
        return -1;
    }

    if (connect(sock, (struct sockaddr*)&serv_addr, sizeof(serv_addr)) < 0) {
        perror("connection failed");
        return -1;
    }
    printf("✅ Connected to server.\n");

    for (int i = 0; i < 5; i++) {
        char msg[32];
        sprintf(msg, "Msg%d", i);

        if (send(sock, msg, strlen(msg), 0) < 0) {
            perror("send failed");
            break;
        }
        printf("Sent: %s\n", msg);
        fflush(stdout);

        int valread = read(sock, buffer, sizeof(buffer) - 1);
        if (valread > 0) {
            buffer[valread] = '\0';
            printf("Server reply: %s\n", buffer);
        } else if (valread == 0) {
            printf("Server closed connection.\n");
            break;
        } else {
            perror("read failed");
            break;
        }

        sleep(1);
    }

    close(sock);
    return 0;
}