<?php

namespace App\Support;

use App\Models\EnvironmentAttachment;

class CaddyRouteRenderer
{
    /**
     * @param  array<int, string>  $upstreams
     */
    public function render(EnvironmentAttachment $attachment, array $upstreams): string
    {
        $config = $attachment->serviceSlice?->config ?? [];
        $domain = $config['domain'] ?? $attachment->serviceSlice?->name ?? $attachment->environment->name;
        $pathPrefix = $config['path_prefix'] ?? '/';
        $siteAddress = ($config['tls_enabled'] ?? true) ? $domain : "http://{$domain}";
        $upstreamTargets = $upstreams === [] ? ['web:80'] : $upstreams;

        if ($pathPrefix === '/') {
            return implode("\n", [
                "{$siteAddress} {",
                '    reverse_proxy '.implode(' ', $upstreamTargets),
                '}',
            ]);
        }

        $normalizedPath = rtrim($pathPrefix, '/');

        return implode("\n", [
            "{$siteAddress} {",
            "    handle_path {$normalizedPath}* {",
            '        reverse_proxy '.implode(' ', $upstreamTargets),
            '    }',
            '}',
        ]);
    }
}