<?php

namespace Coroutine\Server;

class Transport
{

	/**
	 * @var array<Struct>
	 */
	private array $clients = [];


	/**
	 * @param int    $userId
	 * @param Struct $data
	 * @return void
	 */
	public function add(int $userId, Struct $data): void
	{
		if (isset($this->clients[$userId])) {
			$this->clients[$userId]->ws->close();
		}
		$this->clients[$userId] = $data;
	}

	/**
	 * @param int   $userId
	 * @param mixed $data
	 * @return void
	 */
	public function sendUserId(int $userId, mixed $data): void
	{
		if (isset($this->clients[$userId])) {
			$this->clients[$userId]->ws->push($data);
		}
	}

	/**
	 * @param int   $fd
	 * @param mixed $data
	 * @return void
	 */
	public function sendFd(int $fd, mixed $data): void
	{
		$struct = $this->getClientId($fd);
		$struct?->ws->push($data);
	}


	/**
	 * @param int $userId
	 * @return void
	 */
	public function close(int $userId): void
	{
		if (isset($this->clients[$userId])) {
			$this->clients[$userId]->ws->close();
		}
	}


	/**
	 * @param int $userId
	 * @return void
	 */
	public function remove(int $userId): void
	{
		if ($this->has($userId)) {
			$this->clients[$userId]?->ws->close();
		}
		unset($this->clients[$userId]);
	}


	/**
	 * @param int $fd
	 * @return Struct|null
	 */
	public function getClientId(int $fd): ?Struct
	{
		return array_find($this->clients, fn($client) => $client->fd == $fd);
	}


	/**
	 * @param int $userId
	 * @return Struct|null
	 */
	public function getUserId(int $userId): ?Struct
	{
		return $this->clients[$userId] ?? null;
	}


	/**
	 * @param int $userId
	 * @return bool
	 */
	public function has(int $userId): bool
	{
		return isset($this->clients[$userId]);
	}


	/**
	 * @return array
	 */
	public function getLists(): array
	{
		$array = [];
		foreach ($this->clients as $userId => $client) {
			$array[] = [
				'userId'   => $userId,
				'nickname' => $client->user->getNickname(),
			];
		}
		return $array;
	}


	/**
	 * @return int
	 */
	public function size(): int
	{
		return count($this->clients);
	}
}