<?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:----NDE5MTE2OTI2NzgzNTA0MyAxNzQ4Njg0MTk1NzgyMzQwIDg2MDQ0NjE1NTgyNDM4MjU=