<?php
declare(strict_types=1);

namespace Kiri;

use Swoole\Coroutine;
use Swoole\Coroutine\Channel;

class Coordinator
{

	const string WORKER_START = 'worker:start';

	private bool $wait = false;

	private ?Channel $channel = null;


	/**
	 * @return void
	 */
	public function yield(): void
	{
		if (Coroutine::getCid() > 0) {
			if ($this->channel instanceof Channel) {
				$this->channel->pop();
			}
			return;
		}

		if ($this->wait === false) {
			return;
		}
		while ($this->wait === true) {
			usleep(1000);
		}
	}


	/**
	 * @return void
	 */
	public function wait(): void
	{
		Coroutine::getCid() > 0 ? $this->channel = new Channel(1) : $this->wait = true;
	}


	/**
	 * @return void
	 */
	public function done(): void
	{
		if (Coroutine::getCid() > 0) {
			$this->channel?->push(true);
			$this->channel->close();
			$this->channel = null;
		} else {
			$this->wait = false;
		}
	}

}