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

$query = isset($_GET['q']) ? trim($_GET['q']) : '';

if (empty($query)) {
    echo json_encode(['error' => 'Query parameter is missing.']);
    exit;
}

$url = 'https://api.duckduckgo.com/?q=' . urlencode($query) . '&format=json';

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_USERAGENT, 'ArtickleSearch/1.0'); 
$output = curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);

if ($http_code !== 200) {
    http_response_code(500);
    echo json_encode(['error' => 'Failed to fetch data from the external API.']);
    exit;
}

echo $output;