<?php

namespace NoccyLabs\FreshDocker\State;

class Lockfile
{
    private string $filename;

    private int $maxLock = 3600;

    private bool $locked = false;

    public function __construct(string $filename)
    {
        $this->filename = $filename;
        register_shutdown_function([$this,"release"]);
    }

    public function lock()
    {
        if (file_exists($this->filename)) {
            if (time() - filemtime($this->filename) < $this->maxLock) {
                throw new \RuntimeException("Lockfile {$this->filename} already exists");
            }
        }
        touch($this->filename);
        $this->locked = true;
    }

    public function release()
    {
        if ($this->locked && file_exists($this->filename)) {
            unlink($this->filename);
        }
        $this->locked = false;
    }


}