<?php

/**
 * Email Helper
 *
 * Sends emails via PHP mail() function.
 * Configuration via .env variables.
 */

declare(strict_types=1);

class Mailer
{
    /**
     * Send an email
     *
     * @param string $to Recipient email address
     * @param string $subject Email subject (plain text, will be UTF-8 encoded)
     * @param string $htmlBody HTML email body
     * @param string|null $replyTo Optional reply-to address
     * @return bool True if sent successfully
     */
    public static function send(string $to, string $subject, string $htmlBody, ?string $replyTo = null): bool
    {
        $fromEmail = env('SMTP_FROM_EMAIL', env('CONTACT_EMAIL_FROM', 'web@boha-automation.cz'));
        $fromName  = env('SMTP_FROM_NAME', 'System');

        $encodedSubject = '=?UTF-8?B?' . base64_encode($subject) . '?=';

        $headers  = "MIME-Version: 1.0\r\n";
        $headers .= "Content-type: text/html; charset=UTF-8\r\n";
        $headers .= "From: $fromName <$fromEmail>\r\n";
        if ($replyTo) {
            $headers .= "Reply-To: $replyTo\r\n";
        }

        $sent = mail($to, $encodedSubject, $htmlBody, $headers);

        if (!$sent) {
            error_log("Mailer error: mail() failed for recipient $to");
        }

        return $sent;
    }
}