<?php
header('Content-Type: application/json');
header('User-Agent: worldsphere.ai, contact@worldsphere.ai');

// URL for the SPC RSS feed
$url = 'http://www.spc.noaa.gov/products/spcrss.xml';

// Fetch the RSS feed content
$rss = @file_get_contents($url);

if ($rss === false) {
    echo json_encode(['error' => 'Failed to fetch SPC data.']);
    exit;
}

// Parse the XML
$xml = @simplexml_load_string($rss);

if ($xml === false) {
    echo json_encode(['error' => 'Failed to parse SPC XML.']);
    exit;
}

$alerts = [];
if (isset($xml->channel->item)) {
    foreach ($xml->channel->item as $item) {
        // The title often contains the most succinct information
        $title = (string)$item->title;
        
        // The description can be long, let's create a summary or just use the title
        $description = (string)$item->description;

        $alerts[] = [
            'headline' => $title,
            'description' => strip_tags($description), // Basic sanitization
            'link' => (string)$item->link
        ];
    }
}

// Return the alerts as JSON
echo json_encode($alerts);
?>