<?php

namespace Composer\DependencyResolver;

/**
 * @author Nils Adermann <naderman@naderman.de>
 * @implements \Iterator<RuleSet::TYPE_*|-1, 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:----NTMxNTc2MzEyMTgzMjI3OCA4ODE2ODM3MzQwOTM2MjI0IDcwODUwMTE3OTg1MjI2MzM=