<?php
class Pinger extends MY_Controller
{
  /*

  create table pinger(
pingerID int not null auto_increment primary key,
pingerHost varchar(100),
pingerDescription varchar(300),
pingerLastPong datetime,
pingerRttMs int,
pingerIsActive varchar(1) default 'Y',
key(pingerIsActive),
key(pingerHost)
);
  */
  function __construct()
  {
    parent::__construct();
    $this->db->query("use x_logs");
  }
  function do($status = false)
  {
    $sql = "select * from pinger where pingerIsActive = 'Y'";
    $qry = $this->db->query($sql);
    if (!$qry) {
      echo "Err : " . $this->db->last_query();
      exit;
    }
    $rows = $qry->result_array();
    foreach ($rows as $r) {
      $dt =  "[" . date("Y-m-d h:i:s") . "] ";
      echo "$dt Ping " . $r["pingerHost"] . " " . $r["pingerDescription"] . " => ";
      $this->do_ping($r["pingerID"], $r["pingerHost"], $r["pingerDescription"], $status);
      sleep(1);
    }
  }
  function status()
  {
    $this->do(true);
  }
  function do_ping($id, $host, $name, $status = false)
  {
    $rtt = $this->ping($host, 5);
    if ($rtt == -1) {
      $sql_u = "update pinger set pingerRttMs=? where pingerID = ?";
    } else {
      $sql_u = "update pinger set pingerLastPong=now(),pingerRttMs=? where pingerID = ?";
    }
    $qry = $this->db->query($sql_u, [$rtt, $id]);
    $dt =  "[" . date("Y-m-d h:i:s") . "] ";
    if (!$qry) {
      echo "$dt Err : " . $this->db->last_query();
      exit;
    }
    $this->load->library("Wa_sas");
    if ($rtt == -1) {
      //sasone
      //6282113702602-1584412485
      $hp = "6282113702602-1584412485@g.us";
	// hore
	$hp = "120363280846797029@g.us";
      $msg = "$name [$host] unreacheable";
      $resp = $this->wa_sas->send_message($hp, $msg, true);
      echo "$dt OK : unreachable. " . print_r($resp, true);
    } else {
      if ($status) {
        $hp = "6282113702602-1584412485@g.us";
	// hore
	$hp = "120363280846797029@g.us";
        $msg = "$name [$host] : ping avg $rtt ms";
        $resp = $this->wa_sas->send_message($hp, $msg, true);
        echo "$dt OK : unreacheable. " . print_r($resp, true);
      } else {
        echo "$dt OK : avg $rtt ms";
      }
    }
  }
  function ping($host, $count = 5)
  {
    $rtts = [];

    for ($i = 0; $i < $count; $i++) {
      // Use exec to ping the host and capture the output
      $output = [];
      exec("ping -c 1 -W 1 " . escapeshellarg($host), $output, $status);

      // Check if ping was successful (status 0 means success)
      if ($status === 0) {
        // Extract the round-trip time from the output
        if (preg_match('/time=([0-9.]+) ms/', implode("\n", $output), $matches)) {
          $rtts[] = (float)$matches[1];
        }
      }
    }

    // If there are successful pings, calculate the average RTT; otherwise, return -1
    if (count($rtts) > 0) {
      return array_sum($rtts) / count($rtts);
    } else {
      return -1; // Host unreachable in all attempts
    }
  }
}