<?php
/**
 * cron_silent_push_inactive.php
 * Cron job to send a Silent Push Notification to inactive users,
 * forcing their app to wake up in the background and report their current location.
 * Run this periodically (e.g., every few hours or once a day).
 */

require_once __DIR__ . '/../connect.php';
require_once __DIR__ . '/../core/Services/FcmService.php';

// Target users who haven't updated their location in the last 24 hours
// but have a valid FCM token.
// Adjust the timeframe based on your strategy.
$sql = "
    SELECT p.id as passenger_id, t.token
    FROM passengers p
    JOIN tokens t ON p.id = t.passengerID
    LEFT JOIN passenger_opening_locations pol ON p.id = pol.passenger_id
    WHERE (pol.created_at IS NULL OR pol.created_at < DATE_SUB(NOW(), INTERVAL 24 HOUR))
    GROUP BY p.id, t.token
    LIMIT 500 -- Batch size to avoid overloading the server or getting rate-limited
";

$stmt = $con->prepare($sql);
$stmt->execute();
$inactiveUsers = $stmt->fetchAll(PDO::FETCH_ASSOC);

$sentCount = 0;
$fcmService = new FcmService(); // Assuming we have an FcmService or we can use sendFcmNotification directly if it's in functions.php

// In Siro, encryptionHelper is typically used for tokens. Assuming it's required here:
require_once __DIR__ . '/../core/Security/EncryptionHelper.php';
$encryptionHelper = new EncryptionHelper();

foreach ($inactiveUsers as $user) {
    $passengerId = $user['passenger_id'];
    $encryptedToken = $user['token'];
    
    $decryptedToken = $encryptionHelper->decryptData($encryptedToken);
    
    if ($decryptedToken) {
        // Send a silent push notification.
        // A silent push doesn't have a 'notification' payload (title/body), 
        // it only has a 'data' payload with 'content-available' => 1 for iOS.
        
        $dataPayload = [
            'type' => 'location_sync_request',
            'action' => 'wake_up'
        ];
        
        // This is a pseudo implementation relying on your existing push notification setup.
        // Ensure that your FCM implementation correctly maps 'content-available' for iOS.
        sendSilentFcmNotification($decryptedToken, $dataPayload);
        $sentCount++;
    }
}

echo "Silent Push triggered for $sentCount inactive users.\n";

/**
 * Helper to send Silent FCM
 */
function sendSilentFcmNotification($token, $data) {
    if (function_exists('sendFCM_Internal')) {
        return sendFCM_Internal($token, '', '', $data, 'SilentPush', false, 'silent');
    }
    if (!class_exists('FcmService')) {
        require_once __DIR__ . '/../core/Services/FcmService.php';
    }
    $fcm = new FcmService();
    return $fcm->send($token, '', '', $data, 'SilentPush', 'silent');
}
?>