<?php

declare(strict_types=1);

namespace Lightscale\Router;

class Group
{
    use Concerns\HasAncestors;

    public function __construct(
        private Router $router,
        private ?Group $parent,
        private ?string $prefix = null,
        private ?string $name = null,
    ) {
    }

    public function getRouter(): Router
    {
        return $this->router;
    }

    public function getParent(): ?self
    {
        return $this->parent;
    }

    public function prefix(string $value): static
    {
        $this->prefix = $value;

        return $this;
    }

    public function getPrefix(): ?string
    {
        return $this->prefix;
    }

    public function getPath(): string
    {
        $ancestors = $this->getAncestorsAndSelf();

        return '/' . implode('/', array_filter(
            array_map(fn(Group $g): ?string => (
                ($v = $g->getPrefix()) === null ?
                null :
                trim($v, '/')
            ), $ancestors),
            fn (?string $v) => $v !== null
        ));
    }

    public function name(string $value): static
    {
        $this->name = $value;

        return $this;
    }

    public function getName(): ?string
    {
        return $this->name;
    }

    /** @param callable(GroupDefinition): void $cb */
    public function group(callable $cb): void
    {
        ($cb)(new GroupDefinition(
            $this
        ));
    }
}