<?php

namespace WP_CLI\Bootstrap;

use WP_CLI;
use WP_CLI\Utils;

/**
 * Class LoadRequiredCommand.
 *
 * Loads a command that was passed through the `--require=<command>` option.
 *
 * @package WP_CLI\Bootstrap
 */
final class LoadRequiredCommand implements BootstrapStep {

    /**
     * Process this single bootstrapping step.
     *
     * @param BootstrapState $state Contextual state to pass into the step.
     *
     * @return BootstrapState Modified state to pass to the next step.
     */
    public function process( BootstrapState $state ) {
        if ( $state->getValue( BootstrapState::IS_PROTECTED_COMMAND, false ) ) {
            return $state;
        }

        $runner = new RunnerInstance();
        if ( ! isset( $runner()->config['require'] ) ) {
            return $state;
        }

        foreach ( $runner()->config['require'] as $path ) {
            if ( ! file_exists( $path ) ) {
                $context        = '';
                $required_files = $runner()->get_required_files();
                foreach ( [ 'global', 'project', 'runtime' ] as $scope ) {
                    if ( in_array( $path, $required_files[ $scope ], true ) ) {
                        switch ( $scope ) {
                            case 'global':
                                $context = ' (from global ' . Utils\basename( $runner()->get_global_config_path() ) . ')';
                                break;
                            case 'project':
                                $context = ' (from project\'s ' . Utils\basename( $runner()->get_project_config_path() ) . ')';
                                break;
                            case 'runtime':
                                $context = ' (from runtime argument)';
                                break;
                        }
                        break;
                    }
                }
                WP_CLI::error( sprintf( "Required file '%s' doesn't exist%s.", Utils\basename( $path ), $context ) );
            }
            Utils\load_file( $path );
            WP_CLI::debug( 'Required file from config: ' . $path, 'bootstrap' );
        }

        return $state;
    }
}