/* copyright (c) 2020 Mathieu Kerjouan <contact@steepath.eu>
 *
 */
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <ei.h>
#include <string.h>
#include <strings.h>
#include <unistd.h>
#include <uv.h>
#include <uv/unix.h>
#include <uv/bsd.h>
#include "erluv.h"

/* global variables */
short creation = 0;
int id = 1;
char cookie[COOKIE_SIZE];
char node_name[NODE_NAME_SIZE];
char node_target[NODE_NAME_SIZE];

/* set the node cookie from environment */
int
init_cookie() {
  if (getenv("COOKIE") == NULL)
    return 1;
  
  /* the last char must be set to 0. */
  strncpy(cookie, getenv("COOKIE"), COOKIE_SIZE-1);
  return 0;
}

/* set the node name from environment 
 * todo: ensure the node name is valid
 */
int
init_node_name() {
  
  if (getenv("NODE_NAME") == NULL) {
    return 1;
  }
  
  fprintf(stdout, "set node_name ");
  /* the last char must be set to 0. */
  strncpy(node_name, getenv("NODE_NAME"), NODE_NAME_SIZE-1);
  fprintf(stdout, "%s\n", node_name);
  return 0;
}

int
init_node_target() {
  
  if (getenv("NODE_TARGET") == NULL) {
    return 1;
  }
  
  fprintf(stdout, "set node_target");
  /* the last char must be set to 0. */
  strncpy(node_target, getenv("NODE_TARGET"), NODE_NAME_SIZE-1);
  fprintf(stdout, "%s\n", node_target);
  return 0;
}

/* set the node id from environment
 */
int
init_id() {
  int tmpid = 1;
  const char *errstr;
  
  if (getenv("ID") == NULL) {
    return 1;
  }
  
  tmpid = (int)strtonum(getenv("ID"), 1, 0xffff, &errstr);
  if (errstr != NULL) {
    fprintf(stderr, "id is %s\n", errstr);
    return 1;
  }
  
  id = tmpid;
  return 0;
}

/* set the creation time
 */
int
init_creation() {
  fprintf(stdout, "init creation...\n");
  creation = time(NULL)+1;
  return 0;
}

/* sanitize global variables and configure them with
 * environment variable
 */
void
init() {
  bzero(&creation, sizeof(short));
  bzero(&id, sizeof(int));
  bzero(&cookie, sizeof(char)*COOKIE_SIZE);
  bzero(&node_name, sizeof(char)*NODE_NAME_SIZE);
  
  init_cookie();
  init_node_name();
  init_node_target();
  init_id();
  init_creation();

  ei_init();
}

/* process_create
 *
 */
void
process_create() {
  
}