<?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}");
        $body = $response->getBody();
        return json_decode($body);
    }

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

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

        $history = $manifest->history[0];
        $info = json_decode($history->v1Compatibility);

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

}