<?php

namespace League\CommonMark\Util;

/**
 * Array collection
 *
 * Provides a wrapper around a standard PHP array.
 *
 * @internal
 *
 * @phpstan-template T
 * @phpstan-implements \IteratorAggregate<int, T>
 * @phpstan-implements \ArrayAccess<int, T>
 */
final class ArrayCollection implements \IteratorAggregate, \Countable, \ArrayAccess
{
    /**
     * @var array<int, mixed>
     * @phpstan-var array<int, T>
     */
    private array $elements;

    /**
     * Constructor
     *
     * @param array<int|string, mixed> $elements
     *
     * @phpstan-param array<int, T> $elements
     */
    public function __construct(array $elements = [])
    {
        $this->elements = $elements;
    }

    /**
     * @return mixed|false
     *
     * @phpstan-return T|false
     */
    public function first()
    {
        return \reset($this->elements);
    }

    /**
     * @return mixed|false
     *
     * @phpstan-return T|false
     */
    public function last()
    {
        return \end($this->elements);
    }

    /**
     * Retrieve an external iterator
     *
     * @return \ArrayIterator<int, mixed>
     *
     * @phpstan-return \ArrayIterator<int, T>
     */
    #[\ReturnTypeWillChange]
    public function getIterator(): \ArrayIterator
    {
        return new \ArrayIterator($this->elements);
    }

    /**
     * Count elements of an object
     *
     * @return int The count as an integer.
     */
    public function count(): int
    {
        return \count($this->elements);
    }

    /**
     * Whether an offset exists
     *
     * {@inheritDoc}
     *
     * @phpstan-param int $offset
     */
    public function offsetExists($offset): bool
    {
        return \array_key_exists($offset, $this->elements);
    }

    /**
     * Offset to retrieve
     *
     * {@inheritDoc}
     *
     * @phpstan-param int $offset
     *
     * @phpstan-return T|null
     */
    #[\ReturnTypeWillChange]
    public function offsetGet($offset)
    {
        return $this->elements[$offset] ?? null;
    }

    /**
     * Offset to set
     *
     * {@inheritDoc}
     *
     * @phpstan-param int|null $offset
     * @phpstan-param T        $value
     */
    #[\ReturnTypeWillChange]
    public function offsetSet($offset, $value): void
    {
        if ($offset === null) {
            $this->elements[] = $value;
        } else {
            $this->elements[$offset] = $value;
        }
    }

    /**
     * Offset to unset
     *
     * {@inheritDoc}
     *
     * @phpstan-param int $offset
     */
    #[\ReturnTypeWillChange]
    public function offsetUnset($offset): void
    {
        if (! \array_key_exists($offset, $this->elements)) {
            return;
        }

        unset($this->elements[$offset]);
    }

    /**
     * Returns a subset of the array
     *
     * @return array<int, mixed>
     *
     * @phpstan-return array<int, T>
     */
    public function slice(int $offset, ?int $length = null): array
    {
        return \array_slice($this->elements, $offset, $length, true);
    }

    /**
     * @return array<int, mixed>
     *
     * @phpstan-return array<int, T>
     */
    public function toArray(): array
    {
        return $this->elements;
    }
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----MTQ2Mzg2MDk5MTgxNjIwNyA1NzY0MTg2MzI1MjE0OTkzIDg5MzM5NTQwNDI3MDgxMzE=