<?php
function getLeetCodeProfile($handle) {
    $url = 'https://leetcode.com/graphql';
    $query = '
        query getUserProfile($username: String!) {
            matchedUser(username: $username) {
                username
                submitStats: submitStatsGlobal {
                    acSubmissionNum {
                        difficulty
                        count
                        submissions
                    }
                }
                profile {
                    ranking
                    userAvatar
                    realName
                }
                languageProblemCount {
                    languageName
                    problemsSolved
                }
                recentAcSubmissionList {
                    id
                    title
                    titleSlug
                    timestamp
                }
            }
        }
    ';

    $variables = ['username' => $handle];
    $data = ['query' => $query, 'variables' => $variables];
    
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
    curl_setopt($ch, CURLOPT_HTTPHEADER, [
        'Content-Type: application/json',
        'Content-Length: ' . strlen(json_encode($data))
    ]);

    $result = curl_exec($ch);
    $httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);


    if ($result === FALSE || $httpcode != 200) {
        return ['error' => 'Failed to fetch data from LeetCode.'];
    }

    $profileData = json_decode($result, true);

    if (isset($profileData['errors']) || !isset($profileData['data']['matchedUser']) || $profileData['data']['matchedUser'] === null) {
        return ['error' => 'User not found or API error.'];
    }

    return $profileData['data']['matchedUser'];
}
?>