<?php
declare(strict_types=1);

function db(): PDO
{
    static $pdo = null;
    if ($pdo !== null) {
        return $pdo;
    }

    $host = env('DB_HOST', '127.0.0.1');
    $port = env('DB_PORT', '3306');
    $name = env('DB_NAME', 'palmas360');
    $user = env('DB_USER', 'root');
    $pass = env('DB_PASS', '');

    try {
        $pdo = new PDO(
            "mysql:host=$host;port=$port;dbname=$name;charset=utf8mb4",
            $user,
            $pass,
            [
                PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
                PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
                PDO::ATTR_EMULATE_PREPARES   => false,
            ]
        );
    } catch (\PDOException $e) {
        http_response_code(503);
        header('Content-Type: application/json; charset=utf-8');
        echo json_encode(['error' => 'Error de conexión a la base de datos.'], JSON_UNESCAPED_UNICODE);
        exit;
    }

    return $pdo;
}