<?php
header('Content-Type: application/json');
function distanceMeters($lat1, $lon1, $lat2, $lon2)
{
	$x = deg2rad( $lon1 - $lon2 ) * cos( deg2rad( $lat1 ) );
	$y = deg2rad( $lat1 - $lat2 );
	$dist = 6371000.0 * sqrt( $x*$x + $y*$y );

  return $dist;
}
	$db = file('db.txt');
	$db2 = file('db2.txt');

	$sum_of_lat = 0;
	$sum_of_long = 0;
	$sum_of_time = 0;

	$sum_of_lat2 = 0;
        $sum_of_long2 = 0;
        $sum_of_time2 = 0;

	$array_time = array();
	$array_time2 = array();

	$average = new stdClass;
	$average->latitude = 0;
	$average->longitude = 0;
	$average->inTime = 0;
	$average->parada = '';

	$average2 = new stdClass;
        $average2->latitude = 0;
        $average2->longitude = 0;
        $average2->inTime = 0;
        $average2->parada = '';

	$db_size = count($db);
	$db2_size = count($db2);
	$distances=[];
	$distances2 = [];

	$paradas = array(
	        "Generales" => array(18.404916, -66.044828),
	        "Natu1" => array(18.403663, -66.045529),
	        "Natu2" => array(18.403769, -66.046572),
	        "Centro" => array( 18.403898, -66.048255),
	        "Biblio" => array(18.403994, -66.049781),
	        "Merenderos"  => array(18.406345, -66.050197),
	        "leyes" => array (18.406069, -66.047733),
	        "Complejo" => array(18.406503, -66.046121),
	        "rotc_EntrR" => array(18.406083, -66.043605),
	        "rotc_Est" => array( 18.407121, -66.042053),
		"Museo" => array(18.403917, -66.050996),
		"FacundaB" => array(18.401992, -66.050611),
		"Educacion" => array(18.402077, -66.047800),
		"MultiP" => array(18.402133, -66.045014)
	                );

	for ($i = 0; $i < $db_size; $i++)
	{
		$decoded_location = json_decode($db[$i]);
		$sum_of_lat += $decoded_location->latitude;
		$sum_of_long += $decoded_location->longitude;
		array_push($array_time,$decoded_location->inTime);
		if($i+1 == $db_size)
		{
			$average->latitude = $sum_of_lat/$db_size;
			$average->longitude = $sum_of_long/$db_size;
			$average->inTime = date("h:i:s a",(array_sum(array_map('strtotime',$array_time)))/$db_size);
		}
	}

	for ($i = 0; $i < $db2_size; $i++)
        {
                $decoded_location2 = json_decode($db2[$i]);
                $sum_of_lat2 += $decoded_location2->latitude;
                $sum_of_long2 += $decoded_location2->longitude;
                array_push($array_time2,$decoded_location2->inTime);
                if($i+1 == $db2_size)
                {
                        $average2->latitude = $sum_of_lat2/$db2_size;
                        $average2->longitude = $sum_of_long2/$db2_size;
                        $average2->inTime = date("h:i:s a",(array_sum(array_map('strtotime',$array_time2)))/$db2_size);
                }
        }

	foreach($paradas as &$coso)
	{
		$plo2 = distanceMeters($average2->latitude, $average2->longitude, $coso[0], $coso[1]);
		array_push($distances2,$plo2);
		//echo $distances;

	}


	 foreach($paradas as &$thing)
        {
                $plo = distanceMeters($average->latitude, $average->longitude, $thing[0], $thing[1]);
                array_push($distances,$plo);
                //echo $distances;

        }


	$indice = array_search(min($distances),$distances);
	$indice2 = array_search(min($distances2),$distances2);

	$checking = array_keys($paradas);


	$average->parada = $checking[$indice];
	$average2->parada = $checking[$indice2];

	$encoded_average = json_encode($average);
	$encoded_average2 = json_encode($average2);
//	echo $encoded_average;

	$encoded_average =  json_decode($encoded_average);
        $encoded_average2 =  json_decode($encoded_average2);

	if (!empty($encoded_avarage2)){
	$jsoncito  = lcfirst($encoded_average->parada) . "_" . ucfirst($encoded_average->parada);
	}
	elseif(!empty($encoded_average)){
	$jsoncito  = lcfirst($encoded_average2->parada) . "_" . ucfirst($encoded_average2->parada);
	}
	else{
	$jsoncito  = lcfirst($encoded_average->parada) . "_" . ucfirst($encoded_average2->parada);
	}

	$paquete -> parada = $jsoncito;
	date_default_timezone_set('America/Puerto_Rico');

	$currenttime =   date('h:i:s');

	$paquete -> tiempo = $currenttime;

	$encoded_paquete = json_encode($paquete);

	echo $encoded_paquete;

?>