<?php


namespace Rpc;


use Exception;
use Snowflake\Abstracts\Component;
use Snowflake\Snowflake;


/**
 * Class Producer
 * @package Rpc
 */
class Producer extends Component
{

    private array $producers = [];


    private array $classAlias = [];


    private array $consumers = [];


    private array $cmds = [];


    /**
     * @param string $name
     * @param array $handler
     * @param array $node
     */
    public function addProducer(string $name, array $handler, array $node)
    {
        $this->classAlias[get_class($handler[0])] = $name;

        $this->consumers[$name] = $handler[0];

        $this->producers[$name] = $node;
    }


	/**
	 * @param string $cmd
	 * @param array $handler
	 */
    public function addConsumer(string $cmd, array $handler)
    {
        $class = get_class($handler[0]);

        if (!isset($this->classAlias[$class])) {
            return;
        }

        $name = $this->classAlias[$class];

        $this->cmds[$name . '.' . $cmd] = $handler;
    }


	/**
	 * @param $cmd
	 * @param mixed ...$params
	 * @return mixed
	 */
    public function dispatch($cmd, mixed ...$params): mixed
    {
        $handler = $this->cmds[$cmd] ?? null;
        if (empty($handler)) {
            return false;
        }
        return call_user_func($handler, ...$params);
    }


    /**
     * @param $name
     * @return mixed
     * @throws Exception
     */
    public function get($name): mixed
    {
        if (!isset($this->consumers[$name])) {
            throw new Exception('Unknown rpc client.');
        }
        return $this->consumers[$name];
    }


    /**
     * @param string $name
     * @return mixed
     * @throws Exception
     */
    public function getClient(string $name): Client
    {
        if (!is_array($producer = $this->producers[$name] ?? null)) {
            throw new Exception('Unknown rpc client config.');
        }
        $producerName = $this->getName($name, $producer);

        $snowflake = Snowflake::app();
        if (!$snowflake->has($producerName)) {
            return $snowflake->set($producerName, ['class' => Client::class, 'config' => $producer]);
        } else {
            return $snowflake->get($producerName);
        }
    }


    /**
     * @param $name
     * @return Client|bool
     * @throws Exception
     */
    public function __get($name): Client|bool
    {
        return $this->get($name); // TODO: Change the autogenerated stub
    }


    /**
     * @param $name
     * @param $rand
     * @return string
     */
    private function getName($name, $rand): string
    {
        return 'rpc.client.' . $name . '.' . $rand['host'];
    }

}