<?php
// V67 - WEVIA Agent Factory (auto-create missing ERP agents)
// Doctrine: WEVIA detects gap -> creates stub -> wires intent -> zero manual

header('Content-Type: application/json');
header('Access-Control-Allow-Origin: *');

$action = $_REQUEST['action'] ?? 'list';
$registry_file = '/var/www/html/api/wevia-tool-registry.json';
$avatars_file = '/var/www/html/api/agent-avatars-v2.json';
$depts_kpi = '/var/www/html/api/wevia-v64-departments-kpi.php';

function load_missing_agents() {
    global $depts_kpi;
    if (!is_readable($depts_kpi)) return [];
    $content = file_get_contents($depts_kpi);
    preg_match_all("/'gap_agent'=>'([^']+)'/", $content, $m);
    return array_values(array_unique($m[1] ?? []));
}

function agent_id($name) {
    $id = strtolower($name);
    $id = preg_replace('/[^a-z0-9]+/', '_', $id);
    $id = trim($id, '_');
    return $id;
}

function agent_exists_in_registry($name) {
    global $registry_file;
    if (!is_readable($registry_file)) return false;
    $reg = json_decode(file_get_contents($registry_file), true);
    $tools = $reg['tools'] ?? $reg ?? [];
    $id = 'agent_' . agent_id($name);
    foreach ($tools as $t) {
        if (is_array($t) && ($t['id'] ?? '') === $id) return true;
    }
    return false;
}

function create_agent_stub($name) {
    $id = agent_id($name);
    $stub_path = "/var/www/html/api/agent-stubs/agent_{$id}.php";
    $stub_dir = dirname($stub_path);
    if (!is_dir($stub_dir)) @mkdir($stub_dir, 0755, true);
    
    $stub = "<?php\n";
    $stub .= "// V67 auto-generated stub for: {$name}\n";
    $stub .= "header('Content-Type: application/json');\n";
    $stub .= "echo json_encode([\n";
    $stub .= "  'agent' => '{$name}',\n";
    $stub .= "  'id' => 'agent_{$id}',\n";
    $stub .= "  'status' => 'stub',\n";
    $stub .= "  'version' => 'V67',\n";
    $stub .= "  'note' => 'Auto-created by agent-factory. Enrich with business logic.',\n";
    $stub .= "  'kpis' => [],\n";
    $stub .= "  'generated' => date('c')\n";
    $stub .= "]);\n";
    
    $wrote = @file_put_contents($stub_path, $stub);
    return ['ok' => $wrote !== false, 'path' => $stub_path, 'bytes' => $wrote];
}

if ($action === 'list') {
    $missing = load_missing_agents();
    $result = [];
    foreach ($missing as $name) {
        $result[] = [
            'name' => $name,
            'id' => 'agent_' . agent_id($name),
            'in_registry' => agent_exists_in_registry($name),
            'stub_exists' => file_exists("/var/www/html/api/agent-stubs/agent_" . agent_id($name) . ".php")
        ];
    }
    echo json_encode(['ok' => true, 'total' => count($result), 'agents' => $result], JSON_PRETTY_PRINT);
    exit;
}

if ($action === 'create') {
    $name = $_REQUEST['agent'] ?? '';
    if (!$name) { echo json_encode(['ok' => false, 'error' => 'agent name required']); exit; }
    $result = create_agent_stub($name);
    $result['name'] = $name;
    $result['id'] = 'agent_' . agent_id($name);
    echo json_encode($result, JSON_PRETTY_PRINT);
    exit;
}

if ($action === 'bulk_create') {
    $missing = load_missing_agents();
    $created = 0; $skipped = 0; $errors = 0;
    $log = [];
    foreach ($missing as $name) {
        $id = agent_id($name);
        $stub_path = "/var/www/html/api/agent-stubs/agent_{$id}.php";
        if (file_exists($stub_path)) { $skipped++; continue; }
        $r = create_agent_stub($name);
        if ($r['ok']) { $created++; $log[] = $name; } else { $errors++; }
    }
    echo json_encode(['ok' => true, 'created' => $created, 'skipped' => $skipped, 'errors' => $errors, 'agents_created' => $log], JSON_PRETTY_PRINT);
    exit;
}

if ($action === 'count') {
    $missing = load_missing_agents();
    $created = 0;
    foreach ($missing as $name) {
        $id = agent_id($name);
        if (file_exists("/var/www/html/api/agent-stubs/agent_{$id}.php")) $created++;
    }
    echo json_encode([
        'ok' => true,
        'total_missing' => count($missing),
        'already_created' => $created,
        'remaining' => count($missing) - $created
    ]);
    exit;
}

echo json_encode(['ok' => false, 'error' => 'unknown action', 'valid_actions' => ['list','create','bulk_create','count']]);