<?php

namespace Composer\DependencyResolver;

/**
 * @author Nils Adermann <naderman@naderman.de>
 * @implements \Iterator<RuleSet::TYPE_*, Rule>
 */
class RuleSetIterator implements \Iterator
{
	/** @var array<RuleSet::TYPE_*, Rule[]> */
	protected $rules;

	/** @var array<RuleSet::TYPE_*> */
	protected $types;

	/** @var int */
	protected $currentOffset;

	/** @var RuleSet::TYPE_*|-1 */
	protected $currentType;

	/** @var int */
	protected $currentTypeOffset;


	/**
	 * @param array<RuleSet::TYPE_*, Rule[]> $rules
	 */
	public function __construct(array $rules)
	{
		$this->rules = $rules;
		$this->types = array_keys($rules);
		sort($this->types);

		$this->rewind();
	}


	public function current(): Rule
	{
		return $this->rules[$this->currentType][$this->currentOffset];
	}


	/**
	 * @return RuleSet::TYPE_*|-1
	 */
	public function key(): int
	{
		return $this->currentType;
	}


	public function next(): void
	{
		$this->currentOffset++;

		if (!isset($this->rules[$this->currentType])) {
		    return;
		}

		if ($this->currentOffset >= \count($this->rules[$this->currentType])) {
		    $this->currentOffset = 0;

		    do {
		        $this->currentTypeOffset++;

		        if (!isset($this->types[$this->currentTypeOffset])) {
		            $this->currentType = -1;
		            break;
		        }

		        $this->currentType = $this->types[$this->currentTypeOffset];
		    } while (0 === \count($this->rules[$this->currentType]));
		}
	}


	public function rewind(): void
	{
		$this->currentOffset = 0;

		$this->currentTypeOffset = -1;
		$this->currentType = -1;

		do {
		    $this->currentTypeOffset++;

		    if (!isset($this->types[$this->currentTypeOffset])) {
		        $this->currentType = -1;
		        break;
		    }

		    $this->currentType = $this->types[$this->currentTypeOffset];
		} while (0 === \count($this->rules[$this->currentType]));
	}


	public function valid(): bool
	{
		return isset($this->rules[$this->currentType], $this->rules[$this->currentType][$this->currentOffset]);
	}
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----ODIzMjY0MDg5MDc2Njc0OSAzOTcxODcxNjY0MDE4MDUyIDg0OTk4ODUyNDE5Njg3ODg=