<?php

namespace NoccyLabs\Mercureact;

use Monolog\Handler\StreamHandler;
use Monolog\Level;
use Monolog\Logger;
use NoccyLabs\Mercureact\Http\Server;
use Psr\Log\LoggerInterface;
use React\EventLoop\Loop;
use React\EventLoop\LoopInterface;
use React\Socket\SocketServer;

class Daemon
{
    private Configuration $config;

    private LoopInterface $loop;

    private Server $server;

    private LoggerInterface $logger;

    public function __construct(Configuration $config, bool $verbose=false, ?LoopInterface $loop=null)
    {
        $this->config = $config;
        $this->loop = $loop??Loop::get();
        $this->logger = $this->createLogger($verbose);
    }

    private function createLogger(bool $verbose): Logger
    {
        $handlers = [
            new StreamHandler(STDOUT, $verbose?Level::Debug:Level::Info)
        ];
        $logger = new Logger("main", $handlers);
        return $logger;
    }

    public function start(): void
    {
        $this->server = new Server($this->config, $this->logger, $this->loop);

        $this->logger->info("NoccyLabs Mercureact Daemon v".MERCUREACT_VERSION);

        $listenAddress = $this->config->getListenAddress();
        if (!$listenAddress) {
            $this->logger->warning("Empty listening address. You won't make it far.");
            return;
        }
        $socket = new SocketServer("tcp://".$listenAddress);
        $this->server->listen($socket);
    }

    public function stop(): void
    {
        $this->loop->stop();
    }

    public function abort(int $exitcode, ?string $message=null): void
    {
        $bt = debug_backtrace(limit:2);
        $bt = end($bt);
        fprintf(STDERR, "Abort: %s\n  at %s:%d\n  in %s\n", $message??"Unknown reason", $bt['file'], $bt['line'], ($bt['class']??null).($bt['type']??null).$bt['function']);
        $this->loop->stop();
        register_shutdown_function(function () use ($exitcode) {
            exit($exitcode);
        });
    }
}