<?php
/**
 * sync_location.php
 * Unified endpoint for receiving passenger location updates from:
 * - App Usage (Primary)
 * - Geofencing Events (Secondary)
 * - Silent Push Wakeups (Tertiary)
 */

require_once __DIR__ . '/../../connect.php';
// require_once __DIR__ . '/../../functions.php';
require_once __DIR__ . '/../../core/Services/LocationIntelligenceEngine.php';

// Validate JWT or traditional auth if needed. For now, rely on standard filterRequest if used.
$passengerId = filterRequest('passenger_id');
$lat = filterRequest('lat', 'float');
$lng = filterRequest('lng', 'float');
$source = filterRequest('source') ?? 'app_usage'; // 'app_usage', 'geofence', 'silent_push'
$batteryLevel = filterRequest('battery_level', 'int');

if (!$passengerId || !$lat || !$lng) {
    http_response_code(400);
    echo json_encode(['status' => 'failure', 'message' => 'Missing required parameters (passenger_id, lat, lng).']);
    exit;
}

try {
    $engine = new LocationIntelligenceEngine($con);
    $newGeofences = $engine->processLocationUpdate($passengerId, $lat, $lng, $source, $batteryLevel);
    
    // Respond with success and optionally new geofences
    echo json_encode([
        'status' => 'success',
        'message' => 'Location synced successfully',
        'update_geofences' => $newGeofences // App can use this array to update device geofencing regions
    ]);
} catch (Exception $e) {
    error_log("[sync_location.php] Error: " . $e->getMessage());
    http_response_code(500);
    echo json_encode(['status' => 'failure', 'message' => 'Internal server error.']);
}
?>