<?php

namespace WP_CLI\Bootstrap;

use WP_CLI;

/**
 * Class IncludeFallbackAutoloader.
 *
 * Loads the fallback autoloader that is provided through the `composer.json`
 * file.
 *
 * @package WP_CLI\Bootstrap
 */
final class IncludeFallbackAutoloader extends AutoloaderStep {

    /**
     * Get the autoloader paths to scan for an autoloader.
     *
     * @return string[] Array of autoloader paths, or an empty array if none are found.
     */
    protected function get_autoloader_paths() {
        $autoloader_paths = [
            WP_CLI_VENDOR_DIR . '/autoload.php',
        ];

        $custom_vendor = $this->get_custom_vendor_folder();
        if ( false !== $custom_vendor ) {
            array_unshift(
                $autoloader_paths,
                WP_CLI_ROOT . '/../../../' . $custom_vendor . '/autoload.php'
            );
        }

        WP_CLI::debug(
            sprintf(
                'Fallback autoloader paths: %s',
                implode( ', ', $autoloader_paths )
            ),
            'bootstrap'
        );

        return $autoloader_paths;
    }
}