import * as https from 'https';
import { getBlockedList, getContentKeeperUnblocked } from '../categories';

interface PostFormData {
    [key: string]: string;
}

function postForm(url: string, data: PostFormData, timeoutMs: number): Promise<string> {
    return new Promise((resolve, reject) => {
        const body = new URLSearchParams(data).toString();
        const parsedUrl = new URL(url);

        const options = {
            hostname: parsedUrl.hostname,
            path: parsedUrl.pathname + parsedUrl.search,
            method: 'POST',
            headers: {
                'Content-Type': 'application/x-www-form-urlencoded',
                'User-Agent': 'Mozilla/5.0 Node.js Request',
                'Content-Length': Buffer.byteLength(body)
            }
        };

        const req = https.request(options, (res) => {
            const chunks: Buffer[] = [];
            res.on('data', (chunk) => chunks.push(chunk));
            res.on('end', () => resolve(Buffer.concat(chunks).toString()));
        });

        req.on('error', reject);
        if (timeoutMs) {
            req.setTimeout(timeoutMs, () => {
                try {
                    req.destroy(new Error('timeout'));
                } catch (e) { }
            });
        }
        req.write(body);
        req.end();
    });
}

function mapStatus(cat: string): 'B' | 'U' {
    const L: { [key: string]: 'B' | 'U' } = {
        'Adult Content': 'B', 'News': 'B', 'Job Search': 'U', 'Gambling': 'B', 'Travel/Tourism': 'U',
        'Shopping': 'B', 'Entertainment': 'B', 'Instant Messaging': 'B', 'Dating': 'B', 'Game Sites': 'B',
        'Investment': 'B', 'E-Banking': 'B', 'Crime/Terrorism': 'B', 'Religion/Personal Beliefs': 'U',
        'Politics': 'U', 'Sports': 'U', 'Web Mail': 'B', 'Violence/Undesirable': 'B', 'Malicious': 'B',
        'Search Sites': 'U', 'Health Sites': 'U', 'Clubs and Societies': 'B', 'Video': 'B',
        'Business Oriented': 'B', 'Government Blocking List': 'B', 'Educational': 'U', 'Advertising': 'B',
        'Alcohol': 'B', 'Computing/IT': 'U', 'Swimsuit/Lingerie/Models': 'B', 'Remote Control/Desktops': 'B'
    };

    const C: { [key: string]: 'B' | 'U' } = {
        'Osceola-Block': 'B', 'Osceola-Whitelist': 'U', 'Blacklist-Student': 'B', 'BAE - Malicious': 'B',
        'BAE - Suspicious': 'B', 'CSB - Malicious': 'B', 'CSB - Suspicious': 'B', 'CYL - Malicious': 'B',
        'CYL - Suspicious': 'B', 'SMD - Malicious': 'B', 'Osceola-AI Sites': 'B', 'Abortion': 'B',
        'Human Sexuality': 'B', 'Animals:Pet': 'U', 'Arts:Culture': 'U', 'Auctions': 'B',
        'Backups:Storage': 'B', 'Audio Streaming Services': 'B', 'Botnets': 'B', 'Charities': 'U',
        'Child Entertainment': 'B', 'Child Abuse Material': 'B', 'Dictionary': 'U', 'Drugs:Pharmaceuticals': 'B',
        'Dynamic DNS': 'B', 'Chatrooms': 'B', 'Educational Games': 'U', 'Embedded Threats': 'B',
        'Fashion': 'B', 'Government': 'B', 'Guns & Weapons': 'B', 'Hacking': 'B', 'Hobbies': 'U',
        'Hosted Services': 'B', 'Humor': 'B', 'ISPs': 'B', 'Keyloggers': 'B', 'Media:File Sharing': 'B',
        'Millitary': 'B', 'IT Security': 'U', 'Nudity': 'B', 'Online Meetings & Collaboration': 'B',
        'Pay to Surf': 'B', 'Personal': 'B', 'Proishing:Frauds': 'B', 'Proxies:Filtering-Bypass': 'B',
        'Real Estate': 'B', 'Radio': 'B', 'Restaurants/Dining/Food': 'B', 'Sex Education': 'B',
        'Social Networking': 'B', 'Software Downloading/Sharing': 'B', 'Spam URLs': 'B', 'Special Events': 'U',
        'Spyware': 'B', 'Stock Trading': 'B', 'Surveillance Monitoring Site Cams': 'B', 'Suspicious': 'B',
        'Text Messaging': 'B', 'Tobacco': 'B', 'Unions & Professional Organisations': 'U', 'Vehicles': 'B',
        'Viral Video': 'B', 'Weather': 'U', 'IT Forums:Blogs': 'U', 'Peer to Peer': 'B',
        'ShareWare:FreeWare': 'B', 'TV': 'B', 'Drugs:illicit': 'B', 'Academic Fraud': 'B', 'Cults': 'B',
        'AI Services': 'B'
    };

    if (L[cat]) return L[cat];
    if (C[cat]) return C[cat];
    return 'B';
}

export async function check(domain: string) {
    const start = Date.now();
    try {
        const d = String(domain).replace(/^https?:\/\//, '').replace(/\/.*$/, '');
        const html = await postForm(
            'https://isc-ckf05-mgt.cfisd.net/cgi-bin/ck/re_u.cgi',
            {
                USER: '',
                URL_AREA: d,
                NUM_SUBMIT_URL: '1',
                SEL_1: '29',
                CAT_1: '-1',
                URL_1: d,
                DAT_1: 'n/a',
                SUBMIT_SITE_SECOND_CANCEL: 'Cancel'
            },
            8000
        );

        const match = html.match(/color:\s*#ff0000[^>]*>([^<]+)<\/td>/i);
        const cat = match ? match[1].trim() : 'Unknown';

        const blockedList = getBlockedList('content_keeper');
        const allowList = getContentKeeperUnblocked();

        let blocked = false;
        if (blockedList && blockedList.includes(cat)) {
            blocked = true;
        } else if (allowList && allowList.includes(cat)) {
            blocked = false;
        } else {
            blocked = (mapStatus(cat) === 'B');
        }

        const responseTime = Date.now() - start;
        const status = blocked ? 'BLOCKED' : 'ALLOWED';

        return {
            blocked,
            category: cat,
            status,
            response_time: responseTime,
            provider: 'content_keeper'
        };
    } catch (e) {
        return {
            blocked: false,
            category: 'Error',
            status: 'ERROR',
            error: 'Global Error, Service might be down. Please report it to "road.js" on discord please.',
            response_time: Date.now() - start,
            provider: 'content_keeper'
        };
    }
}

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