<?php

namespace App\Controllers\Api;

use Psr\Http\Message\ResponseInterface as Response;
use Psr\Http\Message\ServerRequestInterface as Request;
use App\Controllers\Controller;

class BaseApiController extends Controller
{
    protected function getPdo(): \PDO
    {
        // Get PDO from the container - this assumes PDO is registered in the DI container
        global $container;
        if ($container && $container->has('pdo')) {
            return $container->get('pdo');
        }
        
        // Fallback to creating a new PDO connection
        $host = $_ENV['DB_HOST'] ?? 'localhost';
        $dbname = $_ENV['DB_NAME'] ?? 'medialib';
        $username = $_ENV['DB_USER'] ?? 'root';
        $password = $_ENV['DB_PASS'] ?? '';
        
        try {
            return new \PDO(
                "mysql:host=$host;dbname=$dbname;charset=utf8mb4",
                $username,
                $password,
                [
                    \PDO::ATTR_ERRMODE => \PDO::ERRMODE_EXCEPTION,
                    \PDO::ATTR_DEFAULT_FETCH_MODE => \PDO::FETCH_ASSOC,
                    \PDO::ATTR_EMULATE_PREPARES => false,
                ]
            );
        } catch (\PDOException $e) {
            throw new \Exception('Database connection failed: ' . $e->getMessage());
        }
    }
    protected function success(Response $response, $data = null, int $status = 200): Response
    {
        $responseData = ['success' => true];
        
        if ($data !== null) {
            $responseData['data'] = $data;
        }
        
        return $this->json($response, $responseData, $status);
    }

    protected function error(Response $response, string $message, int $status = 400, array $errors = []): Response
    {
        $responseData = [
            'success' => false,
            'error' => [
                'message' => $message,
                'code' => $status
            ]
        ];
        
        if (!empty($errors)) {
            $responseData['error']['details'] = $errors;
        }
        
        return $this->json($response, $responseData, $status);
    }

    protected function getPaginationParams(Request $request): array
    {
        $params = $request->getQueryParams();
        $page = max(1, (int)($params['page'] ?? 1));
        $perPage = min(50, max(1, (int)($params['per_page'] ?? 20)));
        
        return [
            'page' => $page,
            'per_page' => $perPage,
            'offset' => ($page - 1) * $perPage
        ];
    }

    protected function getAuthUser(Request $request): ?array
    {
        return $request->getAttribute('user');
    }

    protected function isAdmin(Request $request): bool
    {
        $user = $this->getAuthUser($request);
        return $user && ($user['is_admin'] ?? false);
    }
}