<?php
require_once __DIR__ . '/../config.php';

// Uncaught exceptions in web requests become JSON errors (the SPA surfaces
// them) instead of blank 500 pages; details still go to the PHP error log.
if (PHP_SAPI !== 'cli') {
    set_exception_handler(function (Throwable $e): void {
        error_log($e);
        http_response_code(500);
        if (!headers_sent()) {
            header('Content-Type: application/json');
        }
        echo json_encode(['error' => 'Server error: ' . $e->getMessage()]);
    });
}

function db(): PDO
{
    static $pdo = null;
    if ($pdo === null) {
        $dsn = 'mysql:host=' . DB_HOST . ';port=' . DB_PORT . ';dbname=' . DB_NAME . ';charset=utf8mb4';
        $pdo = new PDO($dsn, DB_USER, DB_PASS, [
            PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
            PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
            PDO::ATTR_EMULATE_PREPARES   => false,
        ]);
    }
    return $pdo;
}