<?php

namespace NoccyLabs\FreshDocker;


class ImageReference
{
    private $image;

    private $tag;

    private $registry;

    private $scheme;

    public function __construct(string $image)
    {
        // if (!preg_match('/^http[s]:\/\//i', $image)) {
        $parts = explode("/", $image);
        if (count($parts) < 3) {
            $image = "https://registry.hub.docker.com/{$image}";
        } else {
            $image = "https://{$image}";
        }
        
        $parts = parse_url($image);
        $image = ltrim($parts['path'],'/');
        if (str_contains($image,':')) {
            [$image, $tag] = explode(":", $image, 2);
        } else {
            $tag = 'latest';
        }
        if (!str_contains($image,'/')) {
            $image = "library/{$image}";
        }
        $this->image = $image;
        $this->tag = $tag;
        $this->registry = $parts['host'];
        $this->scheme = $parts['scheme'];
    }

    public function getRegistry(): string
    {
        return $this->registry;
    }

    public function getImage(): string
    {
        return $this->image;
    }

    public function getTag(): string
    {
        return $this->tag;
    }

    public function __toString()
    {
        return sprintf("%s/%s:%s", $this->registry, $this->image, $this->tag);
    }
}