<?php

/**
 * This file is part of the Nette Framework (https://nette.org)
 * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
 */
declare (strict_types=1);
namespace RectorPrefix202604\Nette\Iterators;

use RectorPrefix202604\Nette;
/**
 * Enhanced caching iterator with first/last/counter tracking.
 *
 * @template TKey
 * @template TValue
 * @extends \CachingIterator<TKey, TValue, \Iterator<TKey, TValue>>
 * @property-read bool $first
 * @property-read bool $last
 * @property-read bool $empty
 * @property-read bool $odd
 * @property-read bool $even
 * @property-read int $counter
 * @property-read TKey $nextKey
 * @property-read TValue $nextValue
 */
class CachingIterator extends \CachingIterator implements \Countable
{
    use Nette\SmartObject;
    private int $counter = 0;
    /** @param  iterable<TKey, TValue>|\stdClass  $iterable */
    public function __construct($iterable)
    {
        $iterable = $iterable instanceof \stdClass ? new \ArrayIterator((array) $iterable) : Nette\Utils\Iterables::toIterator($iterable);
        parent::__construct($iterable, 0);
    }
    /**
     * Is the current element the first one?
     */
    public function isFirst(?int $gridWidth = null): bool
    {
        return $this->counter === 1 || $gridWidth && $this->counter !== 0 && ($this->counter - 1) % $gridWidth === 0;
    }
    /**
     * Is the current element the last one?
     */
    public function isLast(?int $gridWidth = null): bool
    {
        return !$this->hasNext() || $gridWidth && $this->counter % $gridWidth === 0;
    }
    public function isEmpty(): bool
    {
        return $this->counter === 0;
    }
    public function isOdd(): bool
    {
        return $this->counter % 2 === 1;
    }
    public function isEven(): bool
    {
        return $this->counter % 2 === 0;
    }
    public function getCounter(): int
    {
        return $this->counter;
    }
    public function count(): int
    {
        $inner = $this->getInnerIterator();
        if ($inner instanceof \Countable) {
            return $inner->count();
        } else {
            throw new Nette\NotSupportedException('Iterator is not countable.');
        }
    }
    /**
     * Forwards to the next element.
     */
    public function next(): void
    {
        parent::next();
        if (parent::valid()) {
            $this->counter++;
        }
    }
    /**
     * Rewinds the Iterator.
     */
    public function rewind(): void
    {
        parent::rewind();
        $this->counter = parent::valid() ? 1 : 0;
    }
    /** @return TKey */
    public function getNextKey()
    {
        return $this->getInnerIterator()->key();
    }
    /** @return TValue */
    public function getNextValue()
    {
        return $this->getInnerIterator()->current();
    }
}
