<?php
// getRideWaiting.php
require_once __DIR__ . '/../../connect.php';

$lat = filterRequest("lat"); 
$lng = filterRequest("lng"); 
$radius = filterRequest("radius"); 

if (empty($lat) || empty($lng)) {
    jsonSuccess([]); 
    exit;
}

if (empty($radius)) {
    $radius = 50; 
}

$finalRides = [];
$rideIds = [];
$redisResultsMap = [];

// 1. محاولة البحث عبر Redis
try {
    $locationServerUrl = getenv('LOCATION_SOCKET_URL'); 
    $INTERNAL_KEY = trim(file_get_contents(getenv('INTERNAL_SOCKET_KEY_PATH')));

    $postData = [
        'action' => 'get_nearby_ride_ids',
        'lat'    => $lat,
        'lng'    => $lng,
        'radius' => $radius
    ];

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $locationServerUrl);
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($postData));
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_TIMEOUT_MS, 500); 
    curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-internal-key: $INTERNAL_KEY"]);

    $response = curl_exec($ch);
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);

    if ($httpCode == 200 && $response) {
        $jsonResults = json_decode($response, true);
        if (is_array($jsonResults) && !empty($jsonResults)) {
            foreach ($jsonResults as $res) {
                $rideIds[] = $res[0];
                $redisResultsMap[$res[0]] = $res[1];
            }
        }
    }
} catch (Exception $e) {
    // نتابع للخطة ب
}

// 2. جلب البيانات (إما عبر IDs أو بحث مباشر)
try {
    if (!empty($rideIds)) {
        // --- الحالة أ: الريدز وجد رحلات ---
        $placeholders = implode(',', array_fill(0, count($rideIds), '?'));
        
        $sql = "
            SELECT 
                wr.id, wr.start_location AS startName, wr.end_location AS endName, 
                wr.date, wr.time, wr.price, wr.passenger_id, wr.status, wr.carType, 
                wr.passengerRate, wr.created_at, wr.price_for_passenger, 
                wr.distance, wr.duration, wr.start_lat, wr.start_lng, 
                wr.end_lat, wr.end_lng, wr.payment_method, wr.passenger_wallet,
                p.email, p.first_name, p.phone, p.id AS passengerId, t.token AS passengerToken
            FROM waitingRides wr
            INNER JOIN passengers p ON p.id = wr.passenger_id
            LEFT JOIN tokens t ON t.passengerID = wr.passenger_id
            LEFT JOIN passengerWallet pw ON pw.passenger_id = wr.passenger_id
            WHERE wr.id IN ($placeholders) AND wr.status IN ('wait', 'waiting')
        ";
        
        $stmt = $con->prepare($sql);
        $stmt->execute($rideIds); 
        $waitingRides = $stmt->fetchAll(PDO::FETCH_ASSOC);

    } else {
        // --- الحالة ب: بحث مباشر MySQL (Fallback) ---
        // 🔥 التصحيح هنا: استخدام أسماء فريدة (:lat1, :lat2) لتجنب خطأ التكرار
        
        $haversine = "( 6371 * acos( cos( radians(:lat1) ) * cos( radians( wr.start_lat ) ) * cos( radians( wr.start_lng ) - radians(:lng) ) + sin( radians(:lat2) ) * sin( radians( wr.start_lat ) ) ) )";

        $sql = "
            SELECT 
                wr.id, wr.start_location AS startName, wr.end_location AS endName, 
                wr.date, wr.time, wr.price, wr.passenger_id, wr.status, wr.carType, 
                wr.passengerRate, wr.created_at, wr.price_for_passenger, 
                wr.distance, wr.duration, wr.start_lat, wr.start_lng, 
                wr.end_lat, wr.end_lng, wr.payment_method, wr.passenger_wallet,
                p.email, p.first_name, p.phone, p.id AS passengerId, t.token AS passengerToken,
                {$haversine} AS driver_distance_km
            FROM waitingRides wr
            INNER JOIN passengers p ON p.id = wr.passenger_id
            LEFT JOIN tokens t ON t.passengerID = wr.passenger_id
            LEFT JOIN passengerWallet pw ON pw.passenger_id = wr.passenger_id
            WHERE 
                wr.status IN ('wait', 'waiting')
                AND wr.created_at >= DATE_SUB(NOW(), INTERVAL 24 HOUR)
                AND wr.start_lat IS NOT NULL
            HAVING driver_distance_km <= :radius
            ORDER BY driver_distance_km ASC
            LIMIT 50
        ";

        $stmt = $con->prepare($sql);
        
        // نمرر القيمة مرتين للمفتاحين المختلفين
        $stmt->execute([
            ':lat1'   => $lat,
            ':lng'    => $lng,
            ':lat2'   => $lat, // تكرار القيمة للمتغير الثاني
            ':radius' => $radius
        ]);
        
        $waitingRides = $stmt->fetchAll(PDO::FETCH_ASSOC);
    }

    // 3. التنسيق
    foreach ($waitingRides as $ride) {
        $ride['phone']      = $encryptionHelper->decryptData($ride['phone'] ?? '');
        $ride['first_name'] = $encryptionHelper->decryptData($ride['first_name'] ?? '');
        $ride['email']      = $encryptionHelper->decryptData($ride['email'] ?? '');

        $ride['start_location'] = $ride['start_lat'] . ',' . $ride['start_lng'];
        $ride['end_location'] = (!empty($ride['end_lat'])) 
            ? $ride['end_lat'] . ',' . $ride['end_lng'] 
            : $ride['endName'];

        $ride['id'] = (string)$ride['id'];

        if (isset($ride['driver_distance_km'])) {
            $ride['driver_distance_km'] = number_format((float)$ride['driver_distance_km'], 1);
        } elseif (isset($redisResultsMap[$ride['id']])) {
            $ride['driver_distance_km'] = number_format((float)$redisResultsMap[$ride['id']], 1);
        } else {
            $ride['driver_distance_km'] = "0.0";
        }

        $finalRides[] = $ride;
    }

    usort($finalRides, function($a, $b) {
        return $a['driver_distance_km'] <=> $b['driver_distance_km'];
    });

    jsonSuccess($finalRides);

} catch (PDOException $e) {
    error_log("DB Error getRideWaiting: " . $e->getMessage());
    jsonError("Database error"); 
}
?>