<?php

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

class AIEO_Campaign_I18n {

	
	const DOMAIN = 'AI eShop Optimizer campaigns';

	
	public static function fields() {
		return array( 'subject', 'body', 'variant_subject', 'variant_body' );
	}

	
	public static function string_name( $wf_id, $step_idx, $field ) {
		return 'wf-' . (int) $wf_id . '-step-' . (int) $step_idx . '-' . sanitize_key( (string) $field );
	}

	
	public static function is_active() {
		return defined( 'WPML_ST_VERSION' ) || defined( 'ICL_SITEPRESS_VERSION' ) || function_exists( 'icl_register_string' );
	}

	
	public static function register_workflow( $wf_id, $steps ) {
		if ( ! self::is_active() || ! is_array( $steps ) ) {
			return;
		}
		foreach ( $steps as $i => $step ) {
			if ( ! is_array( $step ) || 'send' !== ( $step['type'] ?? '' ) ) {
				continue;
			}
			foreach ( self::fields() as $f ) {
				$v = trim( (string) ( $step[ $f ] ?? '' ) );
				if ( '' === $v ) {
					continue;
				}
				do_action( 'wpml_register_single_string', self::DOMAIN, self::string_name( $wf_id, $i, $f ), $v );
			}
		}
	}

	
	public static function translate( $wf_id, $step_idx, $field, $value, $lang = '' ) {
		$value = (string) $value;
		if ( '' === $value ) {
			return $value;
		}
		return (string) apply_filters(
			'wpml_translate_single_string',
			$value,
			self::DOMAIN,
			self::string_name( $wf_id, $step_idx, $field ),
			( '' !== (string) $lang ? (string) $lang : null )
		);
	}

	
	public static function recipient_language_code( $user_id, $email = '', $ctx = array() ) {
		$code = (string) apply_filters( 'aieo_wpml_recipient_language', '', (int) $user_id, (string) $email, (array) $ctx );
		if ( '' !== $code ) {
			return $code;
		}
		$locale = class_exists( 'AIEO_I18n' ) ? AIEO_I18n::recipient_locale( $user_id, $email, $ctx ) : get_locale();
		$langs  = apply_filters( 'wpml_active_languages', null );
		if ( is_array( $langs ) ) {
			foreach ( $langs as $c => $l ) {
				if ( isset( $l['default_locale'] ) && $l['default_locale'] === $locale ) {
					return (string) $c;
				}
			}
		}
		return strtolower( substr( (string) $locale, 0, 2 ) ); 
	}
}