<?php

// Lädt die .env Datei einen Ordner über dieser Datei
function loadEnv(): void
{
    $envPath = dirname(__DIR__, 1) . '/.env';

    if (!file_exists($envPath)) {
        throw new RuntimeException('.env file not found at: ' . $envPath);
    }

    $lines = file($envPath, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);

    foreach ($lines as $line) {
        $line = trim($line);

        if ($line === '' || str_starts_with($line, '#')) {
            continue;
        }

        [$key, $value] = array_pad(explode('=', $line, 2), 2, '');

        $key = trim($key);
        $value = trim($value);

        $_ENV[$key] = $value;
        putenv("$key=$value");
    }
}

// .env einmal laden
loadEnv();

function env(string $key, $default = null)
{
    return $_ENV[$key] ?? getenv($key) ?? $default;
}

function getDatabaseConnection(): mysqli
{
    $databaseAddress  = env('DB_HOST', '127.0.0.1');
    $databasePort     = env('DB_PORT', '3306');
    $databaseName     = env('DB_NAME');
    $databaseUser     = env('DB_USER');
    $databasePassword = env('DB_PASS');

    $mysqli = new mysqli(
        $databaseAddress,
        $databaseUser,
        $databasePassword,
        $databaseName,
        (int) $databasePort
    );

    if ($mysqli->connect_error) {
        throw new RuntimeException(
            'Database connection failed: ' . $mysqli->connect_error
        );
    }

    return $mysqli;
}