<?php

namespace rednaoeasycalculationforms\Parser\Elements;

use rednaoeasycalculationforms\Parser\Core\ParseBase;
use rednaoeasycalculationforms\Parser\Core\ParseFactory;
use rednaoeasycalculationforms\Parser\Core\ParseUtilities;

class ParseFor extends ParseBase
{
    /** @var ParseBase */
    private $Var;
    /** @var ParseBase */
    public $Cond;
    /** @var ParseBase */
    public $Inc;
    public $ShouldBreak = false;
    /** @var ParseBase */
    private $Statement;

    public function __construct($options, $parent)
    {
        parent::__construct($options, $parent);
        $this->Var = ParseFactory::GetParseElement($options->V, $this);
        if(isset($options->C) && $options->C != null)
            $this->Cond = ParseFactory::GetParseElement($options->C, $this);
        if(isset($options->I) && $options->I != null)
            $this->Inc = ParseFactory::GetParseElement($options->I, $this);

        $this->Statement = ParseFactory::GetParseElement($options->S, $this);
    }

    public function Parse($type = null)
    {
        $this->ShouldBreak = false;
        $this->Var->Parse();
        $result = null;
        while($this->Cond == null || $this->Cond->Parse())
        {
            $result = $this->Statement->Parse();
            if($this->ShouldBreak)
                return $result;
            if($this->Inc != null)
                $this->Inc->Parse();
        }
        return $result;
    }

    public function ReturnWasExecuted()
    {
        $this->ShouldBreak = true;
        ParseUtilities::NotifyReturnToParent($this);
    }

    public function BreakWasExecuted()
    {
        $this->ShouldBreak = true;
    }
}