<?php
// api_get_nearby.php (Updated)
require_once __DIR__ . '/vendor/autoload.php';
use Predis\Client;

header('Content-Type: application/json');

$INTERNAL_KEY = trim(file_get_contents('/home/location/.internal_socket_key'));
$PASS_REDIS   = trim(file_get_contents('/home/location/.reds_pass_key'));

$headers = getallheaders();
$receivedKey = $headers['x-internal-key'] ?? $_SERVER['HTTP_X_INTERNAL_KEY'] ?? '';

if ($receivedKey !== $INTERNAL_KEY) {
    http_response_code(403);
    echo json_encode(['status' => false, 'msg' => 'Unauthorized']);
    exit;
}

$lat = $_REQUEST['lat'] ?? null;
$lng = $_REQUEST['lng'] ?? null;
$radius = $_REQUEST['radius'] ?? 5;
$limit = $_REQUEST['limit'] ?? 100;

if (!$lat || !$lng) {
    echo json_encode(['status' => false, 'msg' => 'Invalid Coordinates']); exit;
}

try {
    $redis = new Client(['scheme'=>'tcp',
                         'host'=>'127.0.0.1',
                         'password' => $PASS_REDIS,
                         'port'=>6379,
   						 'database' => 0]
                       );
    $redis->connect();

    // 🔥 التعديل هنا: إضافة WITHCOORD لجلب الإحداثيات من الريدز مباشرة
    $geoResults = $redis->georadius(
        'geo:drivers:available', 
        $lng, $lat, $radius, 'km', 
        ['WITHDIST' => true, 'WITHCOORD' => true, 'COUNT' => $limit * 2, 'SORT' => 'ASC']
    );

    $validDrivers = [];
    $currentTime = time();
    $max_silence = 180;

    foreach ($geoResults as $res) {
        // هيكل النتيجة مع WITHCOORD يختلف قليلاً
        $d_id   = $res[0]; // ID
        $d_dist = $res[1]; // Distance
        $d_coord= $res[2]; // [0=>lng, 1=>lat] 🔥 الإحداثيات هنا

        $profile = $redis->hgetall("driver:profile:$d_id");
        $lastUpdate = isset($profile['updated_at']) ? (int)$profile['updated_at'] : 0;

        if (empty($profile) || ($currentTime - $lastUpdate) > $max_silence) {
            $redis->zrem('geo:drivers:available', $d_id);
            $redis->zrem('geo:drivers:busy', $d_id);
            continue;
        }

        $validDrivers[] = [
            'id'       => $d_id,
            'distance' => $d_dist,
            'heading'  => $profile['heading'] ?? 0,
            'speed'    => $profile['speed'] ?? 0,
            'lat'      => $d_coord[1], // Latitude من الريدز (أدق)
            'lng'      => $d_coord[0]  // Longitude من الريدز
        ];

        if (count($validDrivers) >= $limit) break;
    }

    echo json_encode(['status' => true, 'data' => $validDrivers]);

} catch (Exception $e) {
    echo json_encode(['status' => false, 'msg' => $e->getMessage()]);
}
?>