#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <cairo.h>
#include <gtk/gtk.h>
#include <time.h>


#define M_PI 3.1415
#define MYPORT "4950"    // the port users will be connecting to
#define MAX_EST 70 
#define MAXBUFLEN 100

double radius1 = 100.0;

static char buffer[256];

static gboolean on_expose_event(GtkWidget *widget, GdkEventExpose *event, gpointer data)
{
	double xc1 = 300.0;
	double yc1 = 225.0;


	double angle1 = 0.0  * (M_PI/180.0);  /* angles are specified */
	double angle2 = 360.0 * (M_PI/180.0);  /* in radians           */

	cairo_surface_t *surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 500, 500);
	//cairo_t *cr = cairo_create (surface);

	cairo_t *cr;
	cr = gdk_cairo_create(widget->window);
			
	//circ 1 
	cairo_set_line_width (cr, 10.0);
	cairo_arc (cr, xc1, yc1, radius1, angle1, angle2);
	cairo_stroke (cr);
		
	cairo_destroy(cr);

  return FALSE;
}


static gboolean time_handler(GtkWidget *widget)
{
  if (widget->window == NULL) return FALSE;

  time_t curtime;
  struct tm *loctime;

  curtime = time(NULL);
  loctime = localtime(&curtime);
  strftime(buffer, 256, "%T", loctime);
  
	//printf("\n %f", radius1);
  gtk_widget_queue_draw(widget);
  return TRUE;
}

// get sockaddr, IPv4 or IPv6:
void *get_in_addr(struct sockaddr *sa)
{
    if (sa->sa_family == AF_INET) {
        return &(((struct sockaddr_in*)sa)->sin_addr);
    }
 
    return &(((struct sockaddr_in6*)sa)->sin6_addr);
}

int main (int argc, char *argv[])
{
	
	int sockfd;
    struct addrinfo hints, *servinfo, *p;
    int rv;
    int numbytes;
    struct sockaddr_storage their_addr;
    char buf[MAXBUFLEN];
    socklen_t addr_len;
    char s[INET6_ADDRSTRLEN];
    
    memset(&hints, 0, sizeof hints);
    hints.ai_family = AF_UNSPEC; // set to AF_INET to force IPv4
    hints.ai_socktype = SOCK_DGRAM;
    hints.ai_flags = AI_PASSIVE; // use my IP
 
    if ((rv = getaddrinfo(NULL, MYPORT, &hints, &servinfo)) != 0) {
        fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rv));
        return 1;
    }
 
    // loop through all the results and bind to the first we can
    for(p = servinfo; p != NULL; p = p->ai_next) {
        if ((sockfd = socket(p->ai_family, p->ai_socktype,
                p->ai_protocol)) == -1) {
            perror("listener: socket");
            continue;
        }
 
        if (bind(sockfd, p->ai_addr, p->ai_addrlen) == -1) {
            close(sockfd);
            perror("listener: bind");
            continue;
        }
 
        break;
    }
    
    if (p == NULL) {
        fprintf(stderr, "listener: failed to bind socket\n");
        return 2;
    }
 
    freeaddrinfo(servinfo);

  GtkWidget *window;
  GtkWidget *darea;

  gtk_init(&argc, &argv);

  window = gtk_window_new(GTK_WINDOW_TOPLEVEL);

  darea = gtk_drawing_area_new();
  gtk_container_add(GTK_CONTAINER (window), darea);

  g_signal_connect(darea, "expose-event",
      G_CALLBACK(on_expose_event), NULL);
  g_signal_connect(window, "destroy",
      G_CALLBACK(gtk_main_quit), NULL);

  gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
  gtk_window_set_default_size(GTK_WINDOW(window), 600, 600);

  gtk_window_set_title(GTK_WINDOW(window), "timer");
  g_timeout_add(1000, (GSourceFunc) time_handler, (gpointer) window);
  gtk_widget_show_all(window);
  time_handler(window);

  gtk_main();
  
  //codigo socket
  
   printf("listener: waiting to recvfrom...\n");
	
	while (1) {	
		printf("dentro do while\n");
		addr_len = sizeof their_addr;
		if ((numbytes = recvfrom(sockfd, buf, MAXBUFLEN-1 , 0, (struct sockaddr *) &their_addr, &addr_len)) == -1) {
			perror("recvfrom");
			exit(1);
		}
	 
	 
		printf("listener: got packet from %s\n", inet_ntop(their_addr.ss_family, get_in_addr((struct sockaddr *) &their_addr), s, sizeof s));

		printf("listener: packet is %d bytes long\n", numbytes);
		buf[numbytes] = '\0';
		printf("RECEBIDO: \"%s\"\n", buf);

		radius1 = atoi(buf);
	
		printf("\n %f", radius1);
	
	}
  
  //fim do codigo socket

  return 0;
}