<?php

namespace NoccyLabs\FreshDocker\Registry;

use GuzzleHttp\Client;

class RegistryV2Client
{
    private Client $client;

    public function __construct(string $registry, ?array $auth)
    {
        $this->createClient($registry, $auth);
    }

    private function createClient(string $registry, ?array $auth)
    {
        $this->client = new Client([
            'base_uri' => 'https://' . $registry . '/v2/',
            'auth' => $auth,
        ]);
    }

    public function getManifest(string $image, string $tag)
    {
        $response = $this->client->get("{$image}/manifests/{$tag}", [
            'headers' => [
                //'Accept' => 'application/vnd.docker.distribution.manifest.v2+json',
            ]
        ]);
        $body = $response->getBody();
        return json_decode($body);
    }

    public function getImageStatus(string $image, string $tag)
    {
        $manifest = $this->getManifest($image, $tag);

        //print_r($manifest);

        $fslayers = (array)(($manifest->fsLayers??$manifest->layers)??[]);
        $fshashes = array_map(fn($layer) => $layer->blobSum??$layer->digest, $fslayers);
        $metahash = hash("sha256", join("|", $fshashes));

        if (isset($manifest->history)) {
            $history = $manifest->history[0];
            $info = json_decode($history->v1Compatibility);
        }

        return [
            'image' => $image,
            'tag' => $tag,
            'hash' => $metahash,
            'created' => $info->created??null,
        ];
    }

}