<?php

namespace KupShop\FeedGeneratorBundle\Configuration\Nodes;

use KupShop\FeedGeneratorBundle\Expressions\ExpressionWrapper;

abstract class AbstractNode
{
    /** @var string */
    private $type;

    /** @var string */
    private $value;

    /** @var string */
    protected $valueHash;

    /** @var INode[] */
    private $nodes = [];

    public function getType(): string
    {
        return $this->type;
    }

    public function setType(string $type)
    {
        $this->type = $type;
    }

    public function getValue(): string
    {
        return $this->value;
    }

    public function getValueHash(): string
    {
        if (!isset($this->valueHash)) {
            $this->valueHash = md5(ExpressionWrapper::wrap($this->getValue()));
        }

        return $this->valueHash;
    }

    public function setValue(string $value)
    {
        $this->value = $value;
    }

    /**
     * @return INode[]
     */
    public function getNodes(): array
    {
        return $this->nodes;
    }

    /**
     * @param INode[] $nodes
     */
    public function setNodes(array $nodes)
    {
        $this->nodes = $nodes;
    }

    public function hasNodes(): bool
    {
        return count($this->nodes) > 0;
    }

    public function addNode(INode $node)
    {
        $this->nodes[] = $node;
    }
}