<?php
function db_connect() {
    static $pdo;
    if ($pdo) {
        return $pdo;
    }

    $host = '127.0.0.1';
    $db   = 'app';
    $user = 'app';
    $pass = 'password';
    $charset = 'utf8mb4';

    $dsn = "mysql:host=$host;dbname=$db;charset=$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, $user, $pass, $options);
        return $pdo;
    } catch (\PDOException $e) {
        throw new \PDOException($e->getMessage(), (int)$e->getCode());
    }
}

function init_db() {
    $pdo = db_connect();
    $pdo->exec("CREATE TABLE IF NOT EXISTS projects (
        id INT AUTO_INCREMENT PRIMARY KEY,
        name VARCHAR(255) NOT NULL,
        description TEXT,
        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
    );");
}

init_db();
?>