<?php

namespace Toolbox;

/**
 * Regla de destino: `src/**` -> ROOT_CORE (sin el prefijo `src/`); el resto ->
 * ROOT_DIR. Admite un mapa explícito por componente.
 */
final class Destination
{
    public static function resolve(
        string $source,
        string $rootDir,
        string $rootCore,
        ?array $explicit = null
    ): string {
        $target = self::relative($source, $rootDir, $rootCore, $explicit);

        return rtrim($rootDir, '/') . '/' . $target;
    }

    public static function relative(
        string $source,
        string $rootDir,
        string $rootCore,
        ?array $explicit = null
    ): string {
        if ($explicit !== null && isset($explicit[$source])) {
            return ltrim($explicit[$source], '/');
        }

        $source = ltrim($source, '/');

        if (str_starts_with($source, 'src/')) {
            $inCore = substr($source, 4);
            $prefix = rtrim(str_replace(rtrim($rootDir, '/') . '/', '', $rootCore), '/');

            return ($prefix === '' ? '' : $prefix . '/') . $inCore;
        }

        return $source;
    }
}