#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <stddef.h>

#include "mjson.h"
#include "unix_sockets.h"
#include "melon_vpn_sock.h"

#define JBUF_SIZE 5000
#define NAME_MAX 25
#define IP_MAX 15
#define DEV_MAX 25

struct dev_t {
  char name[NAME_MAX];
  char ip[IP_MAX];
};

struct devlist_t {
    int ndevices;
    struct dev_t list[DEV_MAX];
};

static struct devlist_t devicelist;

static int json_devicelist_read(const char *buf) {
  const struct json_attr_t json_attrs_subdevice[] = {
    {"Name",t_string,STRUCTOBJECT(struct dev_t,name),.len=NAME_MAX},
    {"IP",t_string,STRUCTOBJECT(struct dev_t,ip),.len=IP_MAX},
    {NULL},
  };
  const struct json_attr_t json_attrs_devices[] = {
    {"devices", t_array, STRUCTARRAY(devicelist.list,json_attrs_subdevice,&devicelist.ndevices)},
    {NULL},
  };

  int status;

  memset(&devicelist, '\0', sizeof(devicelist));
  status = json_read_object(buf, json_attrs_devices, NULL);
  if (status != 0) return status;
  return 0;
}

void send_to_daemon(char*, ssize_t);

int main(int argc, char *argv[]) {
  char jbuf[JBUF_SIZE];
  char ibuf[JBUF_SIZE];

  strcpy(jbuf, "{\"devices\":");
  read(STDIN_FILENO, ibuf, JBUF_SIZE);
  strcat(jbuf, ibuf);
  strcat(jbuf, "}");

  int status = json_devicelist_read(jbuf);
  if (status != 0) {
	  puts(json_error_string(status));
  } else {
    ssize_t l=0;
    char obuf[JBUF_SIZE];
    obuf[JBUF_SIZE-1]=0;
    strcpy(obuf, "");

    for (int i = 0; i < devicelist.ndevices; i++) {
      l += strlen(devicelist.list[i].name)+strlen(devicelist.list[i].ip)+2;
      strcat(obuf, devicelist.list[i].name);
      strcat(obuf, "\t");
      strcat(obuf, devicelist.list[i].ip);
      strcat(obuf, "\n");
      obuf[l]=0;
      fprintf(stderr, "l: %d\nobuf: %d\n",l,strlen(obuf));
    }

    send_to_daemon(obuf,l);
  }
}

void send_to_daemon(char *buf, ssize_t n) {
  int sfd = unix_socket_client_start(SV_RPEERS_SOCK_PATH);
  if(sfd==-1) {
    return;
  }

  write(sfd, buf, n);
  close(sfd);

  fprintf(stderr, "Closed connection to socket");
}