<?php

declare(strict_types=1);

namespace Domain\Models\ValueObjects\IncoSheets;

/**
 * Represents a structured and parsed ingredient list.
 *
 * Each entry is either:
 *  - an indexed group (int key)   -> list of ingredient strings without a section label
 *  - a labelled group (string key) -> list of ingredient strings under a section label
 *    (e.g. "Ingrédients", "Traces possibles")
 *
 * @phpstan-type IngredientGroup array<int|string,string[]>
 */
final readonly class Ingredients
{
    /**
     * @param  array<int|string,string[]>  $groups
     */
    public function __construct(
        public readonly array $groups
    ) {
        foreach ($groups as $key => $lines) {
            if (! is_array($lines)) {
                throw new \DomainException(
                    "Invalid ingredient group at key '{$key}': value must be an array of strings"
                );
            }

            foreach ($lines as $i => $line) {
                if (! is_string($line)) {
                    throw new \DomainException(
                        "Invalid ingredient at group '{$key}', index '{$i}': value must be a string"
                    );
                }

                if (empty(trim($line))) {
                    throw new \DomainException(
                        "Invalid ingredient at group '{$key}', index '{$i}': string should not be empty"
                    );
                }
            }
        }
    }
}