<?php

declare(strict_types=1);

namespace App\Controller;

use App\Booking\BoardPresenter;
use App\Booking\DateParam;
use App\Booking\TimeRange;
use App\Entity\ResourceType;
use App\Htmx\HxTrait;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Attribute\Route;

/**
 * One booking board per resource kind: a month calendar next to that kind's floor plan.
 *
 * The kind is a route parameter rather than a separate controller per kind, so a new
 * ResourceType case gets a working board without touching this file.
 */
final class BoardController extends AbstractController
{
    use CurrentUserTrait;
    use HxTrait;

    public function __construct(private readonly BoardPresenter $board)
    {
    }

    #[Route('/buchen/{type}', name: 'app_board', requirements: ['type' => '[a-z]+'], methods: ['GET'])]
    public function index(Request $request, string $type): Response
    {
        $resourceType = $this->resourceType($type);
        $date = DateParam::parseOrToday($request->query->getString('tag'));

        return $this->render('board/index.html.twig', $this->board->context(
            $resourceType,
            $date,
            self::timeOf($request),
            $this->currentUser(),
        ));
    }

    /**
     * Picking a day -- or narrowing the span -- swaps the calendar and the floor plan in one
     * response.
     *
     * This is the whole reason htmxOobResponse exists: two regions, one round trip, no
     * client-side event choreography. Requests without the htmx header get a plain redirect
     * rather than a bare pair of fragments, so the URL stays shareable.
     */
    #[Route('/buchen/{type}/tag/{date}', name: 'app_board_day', requirements: ['type' => '[a-z]+', 'date' => DateParam::PATTERN], methods: ['GET'])]
    public function day(Request $request, string $type, string $date): Response
    {
        $resourceType = $this->resourceType($type);
        $selected = DateParam::parseOrToday($date);
        $time = self::timeOf($request);

        if (!$request->headers->has('HX-Request')) {
            return $this->redirectToRoute('app_board', BoardPresenter::urlParameters($resourceType, $selected, $time));
        }

        return $this->htmxOobResponse(
            'board/index.html.twig',
            ['calendar', 'floorplan'],
            $this->board->context($resourceType, $selected, $time, $this->currentUser()),
            $this->generateUrl('app_board', BoardPresenter::urlParameters($resourceType, $selected, $time)),
        );
    }

    /**
     * A malformed or missing span falls back to the whole day rather than erroring: these are
     * hand-editable query parameters, not route requirements.
     */
    public static function timeOf(Request $request): TimeRange
    {
        return TimeRange::parse($request->query->getString('von'), $request->query->getString('bis'))
            ?? TimeRange::wholeDay();
    }

    /**
     * Route requirements cannot call a method, so the slug is matched loosely and resolved here.
     */
    private function resourceType(string $slug): ResourceType
    {
        try {
            return ResourceType::fromSlug($slug);
        } catch (\ValueError $e) {
            throw $this->createNotFoundException($e->getMessage(), $e);
        }
    }
}