<?php
/**
 * Keeps the translations table in step with posts: a new post of a
 * translatable type gets the default language, a deleted post loses its row.
 */

declare( strict_types = 1 );

namespace AddBlack\Lang\Translation;

defined( 'ABSPATH' ) || exit;

use AddBlack\Lang\Hookable;
use AddBlack\Lang\Hooks;
use AddBlack\Lang\Settings\SettingsRepository;
use WP_Post;

final class PostLanguageTagger implements Hookable {

	public function __construct(
		private readonly TranslationRepository $translations,
		private readonly SettingsRepository $settings
	) {}

	public function register(): void {
		Hooks::action( 'wp_after_insert_post', array( $this, 'on_insert' ), 10, 2 );
		Hooks::action( 'deleted_post', array( $this, 'on_delete' ) );
	}

	public function on_insert( int $post_id, WP_Post $post ): void {
		if ( wp_is_post_revision( $post_id ) || 'auto-draft' === $post->post_status ) {
			return;
		}
		$settings = $this->settings->get();
		if ( ! $settings->is_translatable_type( $post->post_type ) ) {
			return;
		}
		if ( null === $this->translations->find( $post_id ) ) {
			$this->translations->assign( $post_id, $settings->default_code() );
		}
	}

	public function on_delete( int $post_id ): void {
		$this->translations->delete( $post_id );
	}
}