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<?php

declare(strict_types=1);

namespace Laminas\View\Helper;

use Laminas\Mvc\ModuleRouteListener;
use Laminas\Router\RouteMatch;
use Laminas\Router\RouteStackInterface;
use Laminas\View\Exception;
use Traversable;

use function array_merge;
use function func_num_args;
use function get_debug_type;
use function is_array;
use function is_bool;
use function iterator_to_array;
use function sprintf;

/**
 * Helper for making easy links and getting urls that depend on the routes and router.
 */
class Url extends AbstractHelper
{
    /**
     * Router instance.
     *
     * @var RouteStackInterface|null
     */
    protected $router;

    /**
     * Route matches returned by the router.
     *
     * @var RouteMatch|null
     */
    protected $routeMatch;

    /**
     * Generates an url given the name of a route.
     *
     * @see \Laminas\Router\RouteInterface::assemble()
     *
     * @param  string|null $name Name of the route
     * @param  array $params Parameters for the link
     * @param  array|Traversable $options Options for the route
     * @param  bool $reuseMatchedParams Whether to reuse matched parameters
     * @return string Url For the link href attribute
     * @throws Exception\RuntimeException If no RouteStackInterface was provided.
     * @throws Exception\RuntimeException If no RouteMatch was provided.
     * @throws Exception\RuntimeException If RouteMatch didn't contain a matched route name.
     * @throws Exception\InvalidArgumentException If the params object was not an array or Traversable object.
     */
    public function __invoke($name = null, $params = [], $options = [], $reuseMatchedParams = false)
    {
        if (null === $this->router) {
            throw new Exception\RuntimeException('No RouteStackInterface instance provided');
        }

        if (3 === func_num_args() && is_bool($options)) {
            $reuseMatchedParams = $options;
            $options            = [];
        }

        if ($name === null) {
            if ($this->routeMatch === null) {
                throw new Exception\RuntimeException('No RouteMatch instance provided');
            }

            /** @psalm-suppress RedundantCastGivenDocblockType */
            $name = (string) $this->routeMatch->getMatchedRouteName();

            if ($name === '') {
                throw new Exception\RuntimeException('RouteMatch does not contain a matched route name');
            }
        }

        if (! is_array($params)) {
            if (! $params instanceof Traversable) {
                throw new Exception\InvalidArgumentException(
                    'Params is expected to be an array or a Traversable object'
                );
            }
            $params = iterator_to_array($params);
        }

        if ($reuseMatchedParams && $this->routeMatch !== null) {
            $routeMatchParams = $this->routeMatch->getParams();

            if (isset($routeMatchParams[ModuleRouteListener::ORIGINAL_CONTROLLER])) {
                $routeMatchParams['controller'] = $routeMatchParams[ModuleRouteListener::ORIGINAL_CONTROLLER];
                unset($routeMatchParams[ModuleRouteListener::ORIGINAL_CONTROLLER]);
            }

            if (isset($routeMatchParams[ModuleRouteListener::MODULE_NAMESPACE])) {
                unset($routeMatchParams[ModuleRouteListener::MODULE_NAMESPACE]);
            }

            $params = array_merge($routeMatchParams, $params);
        }

        $options['name'] = $name;

        return (string) $this->router->assemble($params, $options);
    }

    /**
     * Set the router to use for assembling.
     *
     * @param RouteStackInterface $router
     * @return Url
     * @throws Exception\InvalidArgumentException For invalid router types.
     * @psalm-suppress DocblockTypeContradiction
     */
    public function setRouter($router)
    {
        if (! $router instanceof RouteStackInterface) {
            throw new Exception\InvalidArgumentException(sprintf(
                '%s expects a %s instance; received %s',
                __METHOD__,
                RouteStackInterface::class,
                get_debug_type($router),
            ));
        }

        $this->router = $router;
        return $this;
    }

    /**
     * Set route match returned by the router.
     *
     * @param  RouteMatch $routeMatch
     * @return Url
     */
    public function setRouteMatch($routeMatch)
    {
        if (! $routeMatch instanceof RouteMatch) {
            throw new Exception\InvalidArgumentException(sprintf(
                '%s expects a %s instance; received %s',
                __METHOD__,
                RouteMatch::class,
                get_debug_type($routeMatch),
            ));
        }

        $this->routeMatch = $routeMatch;
        return $this;
    }
}