<?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:----OTI1NzM1NDk0MDU5MzU4MSAyNzEzNzI0MjEyMzE2NzYgNzMyMTA1NTAyODU0ODI1Nw==