<?php

namespace Phabel\Target\Php70;

use Phabel\Plugin;
use PhpParser\Node;
use PhpParser\Node\Stmt\GroupUse;
use PhpParser\Node\Stmt\Use_;
use PhpParser\Node\Stmt\UseUse;

class GroupUseReplacer extends Plugin
{
    /**
     * Replace group use with multiple use statements
     *
     * @param GroupUse $node Group use statement
     * 
     * @return Use_[]
     */
    public function leave(GroupUse $node): array
    {
        $nodePrefixParts = $node->prefix->parts;

        return \array_map(fn (UseUse $useNode) => $this->createUseNode($nodePrefixParts, $useNode), $node->uses);
    }

    /**
     * Create separate use node.
     *
     * @param string[] $nodePrefixParts Use prefix
     * @param UseUse   $useNode         Current use node
     *
     * @return Use_ New use node
     */
    protected function createUseNode(array $nodePrefixParts, UseUse $useNode): Use_
    {
        $nodePrefixParts []= $useNode->name;

        $nameNode = new Node\Name($nodePrefixParts);

        return new Use_([new UseUse($nameNode, $useNode->alias)], $useNode->type);
    }
}