<?php

declare(strict_types=1);

namespace App\Tests\Controller\Api;

use App\Controller\Api\ExportController;
use App\Controller\Api\TravelController;
use PHPUnit\Framework\Attributes\DataProvider;
use PHPUnit\Framework\TestCase;
use Symfony\Component\Routing\Attribute\Route as RouteAttribute;
use Symfony\Component\Routing\Matcher\UrlMatcher;
use Symfony\Component\Routing\RequestContext;
use Symfony\Component\Routing\Route;
use Symfony\Component\Routing\RouteCollection;

/**
 * Guards the /api/travels namespace against a sibling route being swallowed by byCode().
 *
 * `/api/travels/{dateCode}` accepts an arbitrary string, so anything else placed under
 * `/api/travels/` competes with every date code, and a path falling through to the wrong
 * route answers 404 with a body that reads like an endpoint holding no data. The bulk
 * export lives at `/api/exports/travels` for exactly this reason. The collection is built
 * by reflecting over the real attributes, so this breaks if the declarations change.
 */
class TravelControllerRoutingTest extends TestCase
{
    /**
     * @return array<string, array{string, string}>
     */
    public static function pathProvider(): array
    {
        return [
            'the export lives outside the travels namespace' => ['/api/exports/travels', 'api_exports_travels'],
            // Regression: a dateCode requirement of `.+` instead of the default `[^/]+` widens
            // the segment across slashes, and this four-segment path is then swallowed by byCode().
            'availability is not shadowed by the code lookup' => [
                '/api/travels/12794/225444/2026-12-30/availability',
                'api_travel_hotel_availability',
            ],
            'numeric ids still reach byId' => ['/api/travels/12794/225444', 'api_travel_single_id'],
            'a date code alone reaches byCode' => ['/api/travels/SBW261226', 'api_travel_single_code'],
            'a date and hotel code reach byCode' => ['/api/travels/SBW261226/H1', 'api_travel_single_code'],
            'the mapping index is untouched' => ['/api/travels', 'api_travel_mapping'],
        ];
    }

    #[DataProvider('pathProvider')]
    public function testPathResolvesToTheIntendedRoute(string $path, string $expected): void
    {
        $matcher = new UrlMatcher($this->collection(), new RequestContext('', 'GET'));

        self::assertSame($expected, $matcher->match($path)['_route']);
    }

    public function testDateCodeNeverSpansSlashes(): void
    {
        $route = $this->collection()->get('api_travel_single_code');

        self::assertNotNull($route);
        self::assertStringNotContainsString(
            '.+',
            (string) $route->getRequirement('dateCode'),
            'dateCode must keep the single-segment class, or it shadows the routes below it',
        );
    }

    /**
     * The export must stay out of `/api/travels/`, where it would be one date code away from
     * ambiguity and would need a negative lookahead on byCode() to be reachable at all.
     */
    public function testNothingButTravelLookupsLivesUnderTheTravelsNamespace(): void
    {
        foreach ($this->collection()->all() as $name => $route) {
            self::assertStringNotContainsString(
                '/api/travels/export',
                $route->getPath(),
                $name.' must not sit in the date code namespace',
            );
        }
    }

    /**
     * Reflects the controller's own #[Route] attributes, in declaration order.
     */
    private function collection(): RouteCollection
    {
        $collection = new RouteCollection();

        foreach ([TravelController::class, ExportController::class] as $controller) {
            $this->addRoutes($collection, $controller);
        }

        return $collection;
    }

    /**
     * @param class-string $controller
     */
    private function addRoutes(RouteCollection $collection, string $controller): void
    {
        $class = new \ReflectionClass($controller);

        $prefix = '';
        foreach ($class->getAttributes(RouteAttribute::class) as $attribute) {
            $prefix = (string) $attribute->newInstance()->path;
        }

        foreach ($class->getMethods(\ReflectionMethod::IS_PUBLIC) as $method) {
            foreach ($method->getAttributes(RouteAttribute::class) as $attribute) {
                $route = $attribute->newInstance();

                $collection->add((string) $route->name, new Route(
                    $prefix.$route->path,
                    $route->defaults,
                    $route->requirements,
                    [],
                    '',
                    [],
                    $route->methods,
                ));
            }
        }
    }
}