<?php
declare(strict_types=1);

/**
 * Configuration de la base de données WampServer (MySQL / phpMyAdmin)
 */
define('DB_HOST', '127.0.0.1');
define('DB_PORT', '3306');
define('DB_NAME', 'voituresapi');
define('DB_USER', 'root');
define('DB_PASS', '');
define('DB_CHARSET', 'utf8mb4');

/**
 * Retourne une instance PDO connectée à la base de données
 */
function getDB(): PDO
{
    static $pdo = null;

    if ($pdo === null) {
        $dsn = sprintf('mysql:host=%s;port=%s;dbname=%s;charset=%s', DB_HOST, DB_PORT, DB_NAME, DB_CHARSET);
        $options = [
            PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
            PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
            PDO::ATTR_EMULATE_PREPARES   => false,
        ];

        try {
            $pdo = new PDO($dsn, DB_USER, DB_PASS, $options);
        } catch (PDOException $e) {
            http_response_code(500);
            header('Content-Type: application/json; charset=UTF-8');
            echo json_encode([
                'success' => false,
                'error'   => 'Erreur de connexion à la base de données: ' . $e->getMessage()
            ], JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT);
            exit;
        }
    }

    return $pdo;
}