<?php

namespace App\Framework\CommandBus;

use ArrayIterator;
use Countable;
use IteratorAggregate;
use Traversable;

final readonly class CommandHandlersCollection implements IteratorAggregate, Countable
{
    private array $handlers;
    public function __construct(
        CommandHandlerDescriptor ...$handlers
        #private array $handlers = []
    ){
        $handlerArray = [];
        foreach ($handlers as $handler) {

            $handlerArray[$handler->command] = $handler;
        }
        $this->handlers = $handlerArray;
    }

    /*private function add(string $messageClass, object $handler): void
    {
        $this->handlers[$messageClass] = $handler;
    }*/

    /**
     * @param class-string $commandClass
     * @return CommandHandlerDescriptor|null
     */
    public function get(string $commandClass): ?CommandHandlerDescriptor
    {
        return $this->handlers[$commandClass] ?? null;
    }

    public function all(): array
    {
        return $this->toArray();
    }

    public function getIterator(): Traversable
    {
        return new ArrayIterator($this->handlers);
    }

    public function count(): int
    {
        return count($this->handlers);
    }

    public function toArray(): array
    {
        return $this->handlers;
    }
}