<?php

if (!function_exists('get_env_var')) {
    function get_env_var($key, $default = null) {
        if (isset($_ENV[$key])) return $_ENV[$key];
        $val = getenv($key);
        return $val === false ? $default : $val;
    }
}

if (!function_exists('load_dot_env')) {
    function load_dot_env($path) {
        if (!file_exists($path) || !is_readable($path)) return;
        $lines = file($path, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
        foreach ($lines as $line) {
            if (strpos(trim($line), '#') === 0) continue;
            list($key, $val) = explode('=', $line, 2) + [null, null];
            if ($key === null) continue;
            $key = trim($key);
            $val = trim($val);
            if (preg_match('/^"(.*)"$/', $val, $matches)) $val = $matches[1];
            elseif (preg_match("/'(.*)'/ ", $val, $matches)) $val = $matches[1];
            if (!array_key_exists($key, $_SERVER) && !array_key_exists($key, $_ENV)) {
                putenv("$key=$val");
                $_ENV[$key] = $val;
            }
        }
    }
}

$dotenv_path = __DIR__ . '/../.env';
if (file_exists($dotenv_path)) {
    load_dot_env($dotenv_path);
}

return [
    'transport'     => get_env_var('MAIL_TRANSPORT', 'smtp'),
    'smtp_host'     => get_env_var('SMTP_HOST'),
    'smtp_port'     => get_env_var('SMTP_PORT', 587),
    'smtp_secure'   => get_env_var('SMTP_SECURE', 'tls'), // tls or ssl
    'smtp_user'     => get_env_var('SMTP_USER'),
    'smtp_pass'     => get_env_var('SMTP_PASS'),
    'from_email'    => get_env_var('MAIL_FROM'),
    'from_name'     => get_env_var('MAIL_FROM_NAME'),
    'reply_to'      => get_env_var('MAIL_REPLY_TO'),

    // Optional DKIM signing
    'dkim_domain'   => get_env_var('DKIM_DOMAIN', ''),
    'dkim_selector' => get_env_var('DKIM_SELECTOR', 'default'),
    'dkim_private_key_path' => get_env_var('DKIM_PRIVATE_KEY_PATH', ''), // Path to the private key file
];