<?php
declare(strict_types=1);
namespace App\Modules\Admin;

use App\Core\{Request, Response, Database};

final class AdminController
{
    public function listTenants(Request $request): void
    {
        if ($request->user->role !== 'super_admin') {
            Response::error('غير مصرح لك بالوصول لهذه البيانات', 'FORBIDDEN', 403);
            return;
        }

        $db = Database::getInstance();
        $stmt = $db->prepare("SELECT t.*, (SELECT COUNT(*) FROM invoices WHERE tenant_id = t.id) as invoice_count FROM tenants t");
        $stmt->execute();
        $tenants = $stmt->fetchAll();

        Response::json(['success' => true, 'data' => $tenants]);
    }

    public function getSystemStats(Request $request): void
    {
        if ($request->user->role !== 'super_admin') {
            Response::error('Forbidden', 'FORBIDDEN', 403);
            return;
        }

        $db = Database::getInstance();
        
        $stats = [
            'total_tenants' => (int)$db->query("SELECT COUNT(*) FROM tenants")->fetchColumn(),
            'total_invoices' => (int)$db->query("SELECT COUNT(*) FROM invoices")->fetchColumn(),
            'total_users' => (int)$db->query("SELECT COUNT(*) FROM users")->fetchColumn(),
            'active_subscriptions' => (int)$db->query("SELECT COUNT(*) FROM subscriptions WHERE status = 'active'")->fetchColumn()
        ];

        Response::json(['success' => true, 'data' => $stats]);
    }

    public function getQueueStatus(Request $request): void
    {
        if ($request->user->role !== 'super_admin') {
            Response::error('Forbidden', 'FORBIDDEN', 403);
            return;
        }

        $db = Database::getInstance();
        $stmt = $db->prepare("SELECT status, COUNT(*) as count FROM queue_jobs GROUP BY status");
        $stmt->execute();
        $counts = $stmt->fetchAll();

        Response::json(['success' => true, 'data' => $counts]);
    }

    public function health(Request $request): void
    {
        $dbStatus = 'ok';
        try { Database::getInstance()->query("SELECT 1"); } catch (\Throwable $e) { $dbStatus = 'error'; }

        $redisStatus = 'ok';
        try { \App\Core\Redis::getInstance()->ping(); } catch (\Throwable $e) { $redisStatus = 'error'; }

        Response::json([
            'success' => true,
            'data' => [
                'database' => $dbStatus,
                'redis' => $redisStatus,
                'php_version' => PHP_VERSION,
                'server_time' => date('Y-m-d H:i:s')
            ]
        ]);
    }
}