<?php
/**
 * Generic SMTP sending module.
 *
 * @package NoorSMTP
 */

namespace NoorWork\NoorSMTP\Modules\Smtp;

use NoorWork\NoorSMTP\Modules\ModuleInterface;

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Class SmtpModule
 */
class SmtpModule implements ModuleInterface {

	/**
	 * {@inheritDoc}
	 */
	public function slug() {
		return 'smtp';
	}

	/**
	 * {@inheritDoc}
	 */
	public function label() {
		return __( 'SMTP', 'noorsmtp' );
	}

	/**
	 * {@inheritDoc}
	 */
	public function description() {
		return __( 'Connect to any SMTP server using a host, port, and login credentials.', 'noorsmtp' );
	}

	/**
	 * {@inheritDoc}
	 */
	public function icon() {
		return 'dashicons-admin-site-alt3';
	}

	/**
	 * {@inheritDoc}
	 */
	public function is_pro() {
		return false;
	}

	/**
	 * {@inheritDoc}
	 */
	public function boot() {
		// No extra hooks needed beyond phpmailer_init, handled centrally by Mailer.
	}

	/**
	 * {@inheritDoc}
	 */
	public function settings_fields() {
		return array(
			'smtp_host'       => array(
				'label' => __( 'SMTP Host', 'noorsmtp' ),
				'type'  => 'text',
			),
			'smtp_port'       => array(
				'label'   => __( 'SMTP Port', 'noorsmtp' ),
				'type'    => 'number',
				'default' => 587,
			),
			'smtp_encryption' => array(
				'label'   => __( 'Encryption', 'noorsmtp' ),
				'type'    => 'select',
				'options' => array(
					'tls'  => __( 'TLS', 'noorsmtp' ),
					'ssl'  => __( 'SSL', 'noorsmtp' ),
					'none' => __( 'None', 'noorsmtp' ),
				),
				'default' => 'tls',
			),
			'smtp_auth'       => array(
				'label'   => __( 'Requires Authentication', 'noorsmtp' ),
				'type'    => 'checkbox',
				'default' => true,
			),
			'smtp_username'   => array(
				'label' => __( 'SMTP Username', 'noorsmtp' ),
				'type'  => 'text',
			),
			'smtp_password'   => array(
				'label' => __( 'SMTP Password', 'noorsmtp' ),
				'type'  => 'password',
			),
		);
	}

	/**
	 * {@inheritDoc}
	 */
	public function configure_phpmailer( $phpmailer, array $settings ) {
		$phpmailer->isSMTP();

		$host = isset( $settings['smtp_host'] ) ? sanitize_text_field( $settings['smtp_host'] ) : '';
		$host = preg_replace( '#^(https?|ssl|tls)://#i', '', trim( $host ) );

		$phpmailer->Host     = $host;
		$phpmailer->Port     = isset( $settings['smtp_port'] ) ? absint( $settings['smtp_port'] ) : 587;
		$phpmailer->SMTPAuth = ! empty( $settings['smtp_auth'] );
		$phpmailer->Timeout  = 10;

		$encryption = isset( $settings['smtp_encryption'] ) ? $settings['smtp_encryption'] : 'tls';
		if ( 'none' === $encryption ) {
			$phpmailer->SMTPSecure  = '';
			$phpmailer->SMTPAutoTLS = false;
		} else {
			$phpmailer->SMTPSecure = $encryption;
		}

		if ( $phpmailer->SMTPAuth ) {
			$phpmailer->Username = isset( $settings['smtp_username'] ) ? sanitize_text_field( $settings['smtp_username'] ) : '';
			$phpmailer->Password = isset( $settings['smtp_password'] ) ? $settings['smtp_password'] : '';
		}

		// Prevent SSL verification failures on local development servers, Windows, or self-signed certs.
		$default_ssl_options = array(
			'ssl' => array(
				'verify_peer'       => false,
				'verify_peer_name'  => false,
				'allow_self_signed' => true,
			),
		);

		/**
		 * Filter PHPMailer SMTP connection options.
		 *
		 * @since 1.2.0
		 * @param array $options SSL stream context options.
		 */
		$phpmailer->SMTPOptions = apply_filters( 'noorsmtp_smtp_options', $default_ssl_options );
	}
}