<?php

declare(strict_types=1);

namespace LinkCheckup\Shared\Posts;

use function is_string;

final class PageBuilders {

	private const SWITCHES     = array(
		'Brizy'            => array( 'brizy_enabled', '1' ),
		'Elementor'        => array( '_elementor_edit_mode', 'builder' ),
		'Beaver Builder'   => array( '_fl_builder_enabled', '1' ),
		'Bricks'           => array( '_bricks_editor_mode', 'bricks' ),
		'Thrive Architect' => array( 'tcb_editor_enabled', '1' ),
	);
	private const DATA_FIELDS  = array(
		'Oxygen'                  => 'ct_builder_shortcodes',
		'Breakdance'              => '_breakdance_data',
		'SiteOrigin Page Builder' => 'panels_data',
		'Visual Composer'         => 'vcv-pageContent',
		'Themify Builder'         => '_themify_builder_settings_json',
		'Cornerstone'             => '_cornerstone_data',
		'Live Composer'           => 'dslc_code',
	);
	private const POST_OBJECTS = 'post';

	public function name_of( int $post_id ): string|null {
		$name = apply_filters(
			'link_checkup_page_builder',
			$this->known_builder_of( $post_id ),
			$post_id
		);

		return is_string( $name ) && '' !== $name ? $name : null;
	}

	private function known_builder_of( int $post_id ): string|null {
		foreach ( self::SWITCHES as $name => list( $field, $switched_on ) ) {
			$stored = get_post_meta( $post_id, $field, true );

			if ( $stored === $switched_on ) {
				return $name;
			}
		}

		foreach ( self::DATA_FIELDS as $name => $field ) {
			if ( metadata_exists( self::POST_OBJECTS, $post_id, $field ) ) {
				return $name;
			}
		}

		return null;
	}
}