<?php

declare (strict_types=1);
namespace HelpGent\DI\Definition;

use HelpGent\DI\DependencyException;
use HelpGent\Psr\Container\ContainerInterface;
use HelpGent\Psr\Container\NotFoundExceptionInterface;
/**
 * Definition of a string composed of other strings.
 *
 * @since 5.0
 * @author Matthieu Napoli <matthieu@mnapoli.fr>
 */
class StringDefinition implements Definition, SelfResolvingDefinition
{
    /**
     * Entry name.
     * @var string
     */
    private $name = '';
    /**
     * @var string
     */
    private $expression;
    public function __construct(string $expression)
    {
        $this->expression = $expression;
    }
    public function getName() : string
    {
        return $this->name;
    }
    public function setName(string $name)
    {
        $this->name = $name;
    }
    public function getExpression() : string
    {
        return $this->expression;
    }
    public function resolve(ContainerInterface $container) : string
    {
        return self::resolveExpression($this->name, $this->expression, $container);
    }
    public function isResolvable(ContainerInterface $container) : bool
    {
        return \true;
    }
    public function replaceNestedDefinitions(callable $replacer)
    {
        // no nested definitions
    }
    public function __toString()
    {
        return $this->expression;
    }
    /**
     * Resolve a string expression.
     */
    public static function resolveExpression(string $entryName, string $expression, ContainerInterface $container) : string
    {
        $callback = function (array $matches) use($entryName, $container) {
            try {
                return $container->get($matches[1]);
            } catch (NotFoundExceptionInterface $e) {
                throw new DependencyException(\sprintf("Error while parsing string expression for entry '%s': %s", $entryName, $e->getMessage()), 0, $e);
            }
        };
        $result = \preg_replace_callback('#\\{([^\\{\\}]+)\\}#', $callback, $expression);
        if ($result === null) {
            throw new \RuntimeException(\sprintf('An unknown error occurred while parsing the string definition: \'%s\'', $expression));
        }
        return $result;
    }
}
