<?php
// API aggregateur logs + tasks live
header("Content-Type: application/json");
header("Access-Control-Allow-Origin: *");

$action = $_GET['action'] ?? 'latest';

if ($action === 'latest') {
    $logs = [];
    $dir = '/var/log/weval/';
    $files = @scandir($dir);
    if ($files) {
        foreach ($files as $f) {
            if ($f === '.' || $f === '..') continue;
            $p = $dir . $f;
            if (!is_file($p)) continue;
            $mtime = @filemtime($p);
            if ($mtime < time() - 86400) continue; // last 24h only
            $size = @filesize($p);
            // Read tail 5 lines
            $tail = @shell_exec("tail -n 3 " . escapeshellarg($p) . " 2>/dev/null");
            $logs[] = [
                'file' => $f,
                'size_bytes' => $size,
                'last_modified' => date('Y-m-d H:i:s', $mtime),
                'age_minutes' => intval((time() - $mtime) / 60),
                'tail' => trim($tail),
            ];
        }
        usort($logs, fn($a, $b) => $b['age_minutes'] > $a['age_minutes'] ? -1 : 1);
    }
    
    // Active crons running
    $procs = [];
    $ps = @shell_exec("ps aux 2>/dev/null | grep -E 'wevia|weval|ethica|trainer' | grep -v grep | head -20");
    if ($ps) {
        foreach (explode("\n", trim($ps)) as $line) {
            if (preg_match('/^\S+\s+(\d+)\s+(\S+)\s+(\S+)\s+\S+\s+\S+\s+\S+\s+\S+\s+\S+\s+(\S+)\s+(.+)/', $line, $m)) {
                $procs[] = ['pid' => $m[1], 'cpu' => $m[2], 'mem' => $m[3], 'time' => $m[4], 'cmd' => substr($m[5], 0, 120)];
            }
        }
    }
    
    // Systemd services status
    $services = [];
    $svc_names = ['wevia-async-worker', 'wevia-llm-worker', 'wevia-webchat', 'sovereign-api', 'paperclip', 'ollama', 'deerflow-web', 'deepseek-web', 'wevads-relay'];
    foreach ($svc_names as $s) {
        $status = trim(@shell_exec("systemctl is-active $s 2>&1"));
        $services[$s] = $status;
    }
    
    echo json_encode([
        'ok' => true,
        'ts' => date('c'),
        'logs_count' => count($logs),
        'logs' => $logs,
        'active_processes' => $procs,
        'process_count' => count($procs),
        'services' => $services,
    ], JSON_PRETTY_PRINT);
    exit;
}

if ($action === 'tail') {
    $f = $_GET['file'] ?? '';
    if (!preg_match('/^[a-zA-Z0-9._-]+$/', $f)) {
        echo json_encode(['error' => 'invalid file']); exit;
    }
    $p = '/var/log/weval/' . $f;
    if (!is_readable($p)) {
        echo json_encode(['error' => 'not readable']); exit;
    }
    $n = max(10, min((int)($_GET['n'] ?? 50), 500));
    $content = @shell_exec("tail -n $n " . escapeshellarg($p));
    echo json_encode(['file' => $f, 'lines' => $n, 'content' => $content]);
    exit;
}

echo json_encode(['ok' => true, 'actions' => ['latest', 'tail']]);