<?php

// phpcs:disable WordPress.NamingConventions.ValidVariableName.UsedPropertyNotSnakeCase -- PHPMailer's property names.

namespace RoosterLMS\Notify;

use RoosterLMS\Core\Settings;
use RoosterLMS\Domain\Services;
use RoosterLMS\Orgs\OrgBranding;
use RoosterLMS\Orgs\ProtectedAccounts;

defined( 'ABSPATH' ) || exit;

final class MemberMailWrapper {

	private static bool $registered = false;

	private static int $own = 0;

	public function register(): void {
		if ( self::$registered ) {
			return;
		}
		self::$registered = true;
		add_action( 'phpmailer_init', array( $this, 'wrap' ), 99, 1 );
	}

	public static function own( callable $send ) {
		if ( 0 === self::$own++ ) {
			add_filter( 'wp_mail', array( self::class, 'own_mail' ), 20 );
		}
		try {
			return $send();
		} finally {
			if ( 0 === --self::$own ) {
				remove_filter( 'wp_mail', array( self::class, 'own_mail' ), 20 );
			}
		}
	}

	public static function own_mail( $atts ) {
		return is_array( $atts ) ? apply_filters( 'rooster_lms_own_mail', $atts ) : $atts;
	}

	public function wrap( $phpmailer ): void {
		if ( ! is_object( $phpmailer ) || ! property_exists( $phpmailer, 'Body' ) ) {
			return;
		}
		$body = (string) $phpmailer->Body;
		if ( self::$own > 0 ) {
			if ( false === stripos( (string) $phpmailer->ContentType, 'html' ) ) {
				$phpmailer->ContentType = 'text/html';
				$phpmailer->CharSet     = 'UTF-8';
			}
			return;
		}
		if ( true !== Settings::get( 'brand_member_mail' ) || ! method_exists( $phpmailer, 'getToAddresses' ) || str_contains( $body, BrandedRenderer::MARKER ) ) {
			return;
		}
		$branding = null;
		foreach ( (array) $phpmailer->getToAddresses() as $address ) {
			$user = get_user_by( 'email', (string) ( $address[0] ?? '' ) );
			if ( ! $user instanceof \WP_User || ProtectedAccounts::is_protected( (int) $user->ID ) ) {
				continue;
			}
			$branding = Services::orgs()->branding_for_user( (int) $user->ID );
			if ( null !== $branding ) {
				break;
			}
		}
		if ( ! $branding instanceof OrgBranding ) {
			return;
		}
		$html  = false !== stripos( (string) $phpmailer->ContentType, 'html' ) ? $body : make_clickable( nl2br( esc_html( $body ) ) );
		$plain = '' === trim( (string) $phpmailer->AltBody ) ? trim( wp_strip_all_tags( $body ) ) : (string) $phpmailer->AltBody;

		$phpmailer->Body        = Services::branded_renderer()->render( $branding->org_id, $branding->lang, (string) $phpmailer->Subject, $html );
		$phpmailer->ContentType = 'text/html';
		$phpmailer->CharSet     = 'UTF-8';
		$phpmailer->AltBody     = $plain;
		$phpmailer->FromName    = '' !== $branding->sender_name ? $branding->sender_name : $branding->name;
	}
}