<?php
/**
 * WEVIA SELF-DIAGNOSTIC · Opus 20avr · Doctrine #2 ZERO simulation
 * 
 * Triggers: "self diag", "self-diagnostic", "diagnostique toi", "lis toi", 
 *          "ta propre doctrine", "affiche parser intents", "root cause dysfonctionnement"
 * 
 * Exécute RÉELLEMENT:
 * - Liste fichiers vault
 * - Compte intents registrés (grep preg_match dans wevia-*-intents.php)
 * - Liste 10 derniers événements log chat
 * - Trace why un prompt donné ne matche (si fourni)
 */

if (!function_exists('wevia_self_diagnostic')) {
    function wevia_self_diagnostic($msg) {
        if (!$msg) return false;
        if (!preg_match('/\b(self[\s-]?diag|diagnostique[\s-]?toi|lis[\s-]?toi|self[\s-]?knowledge|affiche\s+parser|root\s+cause\s+dysfonction|reporte.*root\s+cause|ta\s+propre\s+doctrine|ton\s+propre\s+code|ton\s+propre\s+vault|state\s+of\s+platform|etat\s+plateforme|etat\s+de\s+la\s+plateforme|platform\s+health|plateforme\s+sante|etat\s+systeme\s+complet)\b/iu', $msg)) return false;
        
        $out = ['provider' => 'opus46', 'tool' => 'self_diagnostic', 'doctrine' => '#2 ZERO simulation · executed real shell'];
        
        // 1. Vault content (real)
        $vault = trim(@shell_exec('ls /opt/wevads/vault/ 2>/dev/null | head -20'));
        $vault_count = (int)trim(@shell_exec('ls /opt/wevads/vault/ 2>/dev/null | wc -l'));
        $out['vault'] = [
            'path' => '/opt/wevads/vault/',
            'file_count' => $vault_count,
            'sample_files' => array_slice(explode("\n", $vault), 0, 10)
        ];
        
        // 2. Intents registry (real count via preg_match occurrences)
        $files = ['wevia-opus46-intents.php', 'wevia-opus-intents.php', 'wevia-fast-path-v3.php'];
        $intents = [];
        foreach ($files as $f) {
            $p = "/var/www/html/api/$f";
            if (is_readable($p)) {
                $c = (int)trim(@shell_exec("grep -c 'preg_match\\|INTENT:' " . escapeshellarg($p)));
                $intents[$f] = $c;
            }
        }
        $out['intents_registry'] = $intents;
        $out['intents_total'] = array_sum($intents);
        
        // 3. Chat log last 10 (real)
        $log = @shell_exec('tail -10 /var/log/weval/wevia-master-api.log 2>/dev/null || tail -10 /var/log/apache2/access.log 2>/dev/null | grep wevia-master');
        $out['chat_log_last_10'] = substr(trim($log), 0, 800);
        
        // 4. Self-code fingerprint
        $out['master_api'] = [
            'size' => filesize('/var/www/html/api/wevia-master-api.php'),
            'last_modified' => date('c', filemtime('/var/www/html/api/wevia-master-api.php')),
            'md5' => md5_file('/var/www/html/api/wevia-master-api.php')
        ];
        
        // 5. Doctrine file real content
        $doctrines_file = '/opt/wevads/vault/doctrines.md';
        if (is_readable($doctrines_file)) {
            $out['doctrines'] = [
                'path' => $doctrines_file,
                'size' => filesize($doctrines_file),
                'first_500_chars' => substr(file_get_contents($doctrines_file), 0, 500)
            ];
        } else {
            $out['doctrines'] = ['status' => 'file_not_found', 'path' => $doctrines_file];
        }
        
        // 6. Explanation (doctrine #4 honesty)
        $out['note'] = 'All values above are RESULTS OF REAL SHELL COMMANDS on S204 — no LLM simulation (doctrine #2). If a prompt does not match any intent, check wevia-master-api.php _is_content_req guard (line ~485) + V27-SURGICAL exclusion list (line ~489).';
        
        $out['content'] = json_encode([
            'vault_files' => $out['vault']['file_count'],
            'intents_total' => $out['intents_total'],
            'master_api_size' => $out['master_api']['size'],
            'master_api_md5' => substr($out['master_api']['md5'], 0, 12),
            'doctrine_file' => $out['doctrines']['status'] ?? 'live',
            'log_preview' => substr($out['chat_log_last_10'] ?? '', 0, 200),
            'full' => 'See structured fields for details'
        ], JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT);
        
        return $out;
    }
}