#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <unistd.h>

#include <err.h>
#include <errno.h>

#include <pthread.h>

void * next_customer(int new_socket)
{
  char *hello = "Hello from server";
  char buffer[1024] = {0};
  int valread = read(new_socket, buffer, 1024);
  printf("%s %d\n", buffer, valread);

  send(new_socket, hello, strlen(hello), 0);

  printf("Hello message sent\n");
  return NULL;
}

void serve(int server_fd)
{
  struct sockaddr_in address;
  int addrlen = sizeof(address);
  warn("waiting for connections on %d", server_fd);

  for(int new_socket = 0
      ; 1 ; new_socket=accept(server_fd, (struct sockaddr*) &address, (socklen_t*) &addrlen))
  {
    warn("next: %d", new_socket);
    // next_customer(new_socket);
    pthread_t thread_id;
    pthread_create(&thread_id, NULL, next_customer, new_socket);
    pthread_join(thread_id, NULL);
  }
}

#define PORT 8080
int main(int argc, char const *argv[]) 
{
  int server_fd;
  int opt = 1;

  struct sockaddr_in address;
  address.sin_family = AF_INET;
  address.sin_addr.s_addr = INADDR_ANY;
  address.sin_port = htons(PORT);

  0 == (server_fd = socket(AF_INET, SOCK_STREAM, 0))
    ? err(EXIT_FAILURE, NULL)
  : setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT, &opt, sizeof(opt))
    ? err(EXIT_FAILURE, "setsockopt failed on socket with fileno %d", server_fd)
  : bind(server_fd, (struct sockaddr*) &address, sizeof(address))
    ? err(EXIT_FAILURE, NULL)
  : listen(server_fd, 3)
    ? err(EXIT_FAILURE, NULL)
  : serve(server_fd);


  return 0;
}

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