<?php

namespace App\Services\Registries;

use App\Enums\RegistryType;
use App\Models\Environment;
use App\Models\Registry;

class ImageReference
{
    public function tagFor(Environment $environment, string $commitSha, ?Registry $registry = null): string
    {
        $tag = substr($commitSha, 0, 12);

        if ($this->registryType($registry) === RegistryType::MANAGED) {
            $namespace = trim((string) config('keystone.managed_registry.namespace', 'keystone'), '/');
            $applicationId = $environment->application->uuid ?: 'app-'.$environment->application_id;
            $environmentId = $environment->uuid ?: 'env-'.$environment->id;
            $path = $namespace.'/'.$applicationId.'/'.$environmentId;

            return $path.':'.$tag;
        }

        return str($environment->application->name)
            ->slug()
            ->append(':'.$tag)
            ->value();
    }

    public function registryReference(Registry $registry, string $imageTag): string
    {
        return rtrim($this->registryHost((string) $registry->url), '/').'/'.ltrim($imageTag, '/');
    }

    private function registryHost(string $url): string
    {
        $host = preg_replace('#^https?://#', '', trim($url));

        return $host === null ? trim($url) : $host;
    }

    private function registryType(?Registry $registry): ?RegistryType
    {
        if (! $registry instanceof Registry) {
            return null;
        }

        if ($registry->type instanceof RegistryType) {
            return $registry->type;
        }

        return RegistryType::tryFrom((string) $registry->type);
    }
}