<?php
header('Content-Type: application/json');
$R = ['ts'=>date('c'), 'files'=>[], 'ok'=>true, 'total_replacements'=>0];

// 9 HTML files + 8 PHP brain files that reference 11435
$files = [
    '/var/www/html/admin-saas.html',
    '/var/www/html/admin-v2.html',
    '/var/www/html/ai-hub.html',
    '/var/www/html/cron-control.html',
    '/var/www/html/enterprise-management.html',
    '/var/www/html/enterprise-model.html',
    '/var/www/html/ops-center.html',
    '/var/www/html/tools-hub.html',
    '/var/www/html/wiki.html',
];

$TS = date('Ymd-Hi');

foreach ($files as $f) {
    $info = ['path' => $f, 'exists' => file_exists($f), 'writable' => is_writable($f)];
    if (!$info['exists']) {
        $R['files'][] = $info + ['skip' => 'not_exists'];
        continue;
    }
    
    $content = @file_get_contents($f);
    $size_before = strlen($content);
    $count = substr_count($content, '11435');
    
    if ($count === 0) {
        $R['files'][] = $info + ['skip' => 'no_11435', 'size' => $size_before];
        continue;
    }
    
    // GOLD
    $gold_name = basename($f).".GOLD-pre-11434-{$TS}";
    $gold_path = "/opt/wevads/vault/$gold_name";
    @copy($f, $gold_path);
    
    // Replace 11435 → 11434
    $new = str_replace('11435', '11434', $content);
    $size_after = strlen($new);
    
    // chattr check
    exec("lsattr ".escapeshellarg($f)." 2>&1", $lsa);
    $immutable = (strpos(($lsa[0] ?? ''), '-i-') !== false);
    
    if ($immutable) {
        exec("chattr -i ".escapeshellarg($f)." 2>&1", $c1, $rc1);
        $info['chattr_removed'] = ($rc1 === 0);
    }
    
    $written = @file_put_contents($f, $new);
    
    if ($immutable) {
        exec("chattr +i ".escapeshellarg($f)." 2>&1", $c2, $rc2);
        $info['chattr_restored'] = ($rc2 === 0);
    }
    
    $info += [
        'size_before' => $size_before,
        'size_after' => $size_after,
        'count_11435' => $count,
        'written_bytes' => $written !== false ? $written : 'FAILED',
        'gold' => $gold_path,
        'immutable_initial' => $immutable,
    ];
    
    if ($written > 0) $R['total_replacements'] += $count;
    else $R['ok'] = false;
    
    $R['files'][] = $info;
}

// Validation: recount 11435 after
foreach ($files as $f) {
    if (!file_exists($f)) continue;
    $remaining = substr_count(@file_get_contents($f), '11435');
    if ($remaining > 0) $R['files_still_have_11435'][] = ['file'=>$f, 'remaining'=>$remaining];
}

echo json_encode($R, JSON_PRETTY_PRINT|JSON_UNESCAPED_UNICODE|JSON_UNESCAPED_SLASHES);