<?php

namespace App\Services\Labs;

use Illuminate\Support\Facades\File;
use RuntimeException;
use Symfony\Component\Yaml\Yaml;

/**
 * Lit le lab.yaml d'un lab (voir paillasse-contenus/README.md pour le
 * format), pour que GenerateurTemplateHeat puisse en faire une stack.
 */
class DefinitionLab
{
    public readonly string $identifiant;

    /** @var array<int, array{nom: string, cidr: string}> */
    public readonly array $reseaux;

    /** @var array<int, array{nom: string, image: string, flavor: string, reseaux: array<int, string>, preparation: ?string}> */
    public readonly array $machines;

    public static function depuis(string $identifiantLab): self
    {
        $chemin = config('labs.dossier')."/{$identifiantLab}/lab.yaml";

        if (! File::exists($chemin)) {
            throw new RuntimeException("Lab introuvable : {$chemin}");
        }

        $donnees = Yaml::parseFile($chemin);

        return new self($donnees);
    }

    private function __construct(array $donnees)
    {
        $this->identifiant = $donnees['id'];
        $this->reseaux = $donnees['reseaux'];
        $this->machines = array_map(
            fn (array $m) => [
                'nom' => $m['nom'],
                'image' => $m['image'],
                'flavor' => $m['flavor'],
                'reseaux' => $m['reseaux'],
                'preparation' => $m['preparation'] ?? null,
            ],
            $donnees['machines'],
        );
    }
}