<?php

// ===========
// Email Class
// ===========

use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;

class Email extends Base {

    public function sendPasswordReset(array $user, string $url): bool {
        $xml = new SimpleXMLElement('<users><record/></users>');
        $xml->record->user_name = $user['user_first_name'] ?: $user['user_name'];
        $body = $this->applyXSL($xml, $this->getXSL('emailPasswordResetLink'), ['RESET_URL' => $url]);
        return $this->sendEmail((string) $user['user_email'], self::APPLICATION_NAME . ' - Password reset', $body);
    }

    // Variables.

    private $current_user_name = "";
    private $current_user_email = "";

    // ==================
    // Class Constructor.
    // ==================

    public function __construct() {

        set_error_handler(array($this, "displayError"));

        date_default_timezone_set(self::TIMEZONE);

        $this->current_user_name = $_SESSION[self::USER_NAME] ?? "";
        $this->current_user_email = $_SESSION[self::USER_EMAIL] ?? "";
    }

    // =============================
    // Email a new users credentials
    // =============================

    public function emailNewUserCredentials($user, $password = null) {
        $this->emailUserPasswordResetLink($user);
    }

    public function emailUserPasswordResetLink($user, $password = null) {
        if ($user instanceof SimpleXMLElement) {
            (new AuthService())->requestReset((string) $user->record->user_email);
        }
    }

    // =======================================
    // Send an email with optional attachments
    // =======================================

    public function sendEmail($to = "", $subject = "", $message = "", $attachments = "", $attachment_names = "unknown") {

        if (empty($to) or empty($subject) or empty($message)) {

            return false;
        }

        $settings = $this->getSettings();

        $SmtpHost = $settings->SmtpServer;
        $SmtpUsername = $settings->SmtpUserName;
        $SmtpPassword = $settings->SmtpPassword;
        $SmtpPort = $settings->SmtpPort;

        $email = new PHPMailer(true);

        // Only for development

        $message = "<span style='font-family: Calibri, Arial, sans-serif;'>" . $message . "</span>";

        try {

            //Server settings
            $email->isSMTP();
            $email->Host = (string) $SmtpHost;
            $email->SMTPAuth = true;
            $email->Username = (string) $SmtpUsername;
            $email->Password = (string) $SmtpPassword;
            $email->Port = (int) $SmtpPort;
            $email->SMTPSecure = $email->Port === 465 ? PHPMailer::ENCRYPTION_SMTPS : PHPMailer::ENCRYPTION_STARTTLS;
            $email->Timeout = 15;
            $email->CharSet = 'UTF-8';

            $email->isHTML(true);
            $email->setFrom((string) ($settings->SmtpFromEmail ?? $settings->SmtpUserName), self::APPLICATION_NAME);

            if (is_array($to)) {
                foreach ($to as $address) {
                    $address = trim(str_replace(" ", "", $address));
                    if (empty($address)) {
                        continue;
                    }
                    $email->addAddress($address);
                }
            } else {
                $email->addAddress($to);
            }

            $email->Subject = $subject;
            $email->Body = $message;
            $email->AltBody = html_entity_decode(strip_tags(preg_replace('/<a\s+href="([^"]*)"[^>]*>(.*?)<\/a>/is', '$2 ($1)', $message)), ENT_QUOTES | ENT_HTML5, 'UTF-8');

            if (is_array($attachments)) {
                foreach ($attachments as $index => $item) {
                    if (!empty($item)) {
                        $email->addStringAttachment($item, ($attachment_names[$index] ?? "unknown"));
                    }
                }
            } else {
                if (!empty($attachments)) {
                    $email->addStringAttachment($attachments, $attachment_names);
                }
            }

            $success = $email->Send();
        } catch (\Throwable $e) {

            error_log('Email delivery failed: ' . $e->getMessage());
            $success = false;
        }

        return $success;
    }

    // ==============================
    // Send an Error Email to Support
    // ==============================

    public function sendErrorEmail($error_message = "", $error_file = "", $error_line = "") {

        $settings = $this->getSettings();

        $Environment = (string) $settings->Environment;
        $SupportEmail = (string) $settings->SupportEmail;

        if ($Environment == "Development") {
            return;
        }

        $application_name = self::APPLICATION_NAME;

        $message = "";

        $message .= "<p>An application error has occurred in the {$application_name} application.<br/><br/></p>";
        $message .= "<p>File:  {$error_file}</p>";
        $message .= "<p>Line:  {$error_line}</p>";
        $message .= "<p>Error: {$error_message}</p>";

        $to = $SupportEmail;
        $subject = "{$application_name} Application Error";

        $this->sendEmail($to, $subject, $message);
    }
}

?>