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

$files = [
    '/opt/wevia-brain/monitor-gguf.php',
    '/opt/wevia-brain/wevia-agent-loop.php',
    '/opt/wevia-brain/wevia-bridge-intents.php',
    '/opt/wevia-brain/wevia-director-agent.php',
    '/opt/wevia-brain/wevia-dispatcher.php',
    '/opt/wevia-brain/wevia-master-router.php',
    '/opt/wevia-brain/wevia-rag-engine.php',
    '/opt/wevia-brain/wv-llm-helper.php',
];

foreach ($files as $f) {
    $info = ['path' => $f, 'exists' => file_exists($f)];
    if (!$info['exists']) { $R['files'][] = $info+['skip'=>'missing']; continue; }
    
    $content = file_get_contents($f);
    $count = substr_count($content, '11435');
    
    if ($count === 0) { $R['files'][] = $info+['skip'=>'no_11435']; continue; }
    
    exec('lsattr '.escapeshellarg($f).' 2>&1', $lsa);
    $immut = isset($lsa[0]) && strpos($lsa[0], '-i-') !== false;
    
    // GOLD
    $gold = "/opt/wevads/vault/" . basename($f) . ".GOLD-pre-11434-{$TS}";
    @copy($f, $gold);
    
    // Validate: is PHP still valid after replace?
    $new = str_replace('11435', '11434', $content);
    $tmp = "/tmp/check-" . basename($f) . "-{$TS}";
    file_put_contents($tmp, $new);
    exec("php8.4 -l $tmp 2>&1", $lo, $lr);
    unlink($tmp);
    
    if ($lr !== 0) {
        $R['files'][] = $info+['skip'=>'LINT_FAIL', 'err'=>$lo];
        $R['ok'] = false;
        continue;
    }
    
    if ($immut) {
        exec('chattr -i '.escapeshellarg($f).' 2>&1', $c1, $rc1);
        $info['chattr_removed'] = ($rc1 === 0);
        if (!$info['chattr_removed']) {
            $R['files'][] = $info+['skip'=>'chattr_blocked'];
            continue;
        }
    }
    
    $w = @file_put_contents($f, $new);
    
    if ($immut) {
        exec('chattr +i '.escapeshellarg($f).' 2>&1');
    }
    
    $remaining = substr_count(@file_get_contents($f), '11435');
    $info += [
        'count_before' => $count,
        'count_after' => $remaining,
        'written' => $w,
        'gold' => $gold,
        'immutable' => $immut,
        'ok' => ($remaining === 0)
    ];
    $R['files'][] = $info;
    if ($remaining === 0) $R['total'] += $count;
}
echo json_encode($R, JSON_PRETTY_PRINT|JSON_UNESCAPED_SLASHES);