<?php

declare(strict_types=1);

namespace App\Service;

use App\Exception\ParticipantNotFoundException;
use App\Form\Model\BookingDto;
use App\Form\Model\ParticipantDto;
use App\Form\Model\ParticipantEditDto;
use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;

/**
 * Shared helpers for participant edit forms in create and edit booking flows.
 */
class ParticipantFormSupportService
{
    public function __construct(
        private readonly ParameterBagInterface $parameterBag,
    ) {
    }

    public function ensureParticipantExists(BookingDto $bookingDto, int $index): ParticipantDto
    {
        $participant = $bookingDto->participants[$index] ?? null;

        if (null === $participant) {
            throw new ParticipantNotFoundException($index);
        }

        return $participant;
    }

    public function createParticipantEditDto(BookingDto $bookingDto, int $index): ParticipantEditDto
    {
        return new ParticipantEditDto(
            participant: $this->ensureParticipantExists($bookingDto, $index),
            bookingContext: $bookingDto,
        );
    }

    /**
     * @return array<string, mixed>
     */
    public function getParticipantFormOptions(BookingDto $bookingDto, bool $disableValidation = false): array
    {
        $options = [
            'booking_context' => $bookingDto,
            'height_choices' => $this->parameterBag->get('body_dimensions.height_choices'),
            'weight_choices' => $this->parameterBag->get('body_dimensions.weight_choices'),
            'shoe_size_min' => $this->parameterBag->get('body_dimensions.shoe_size_min'),
            'shoe_size_max' => $this->parameterBag->get('body_dimensions.shoe_size_max'),
        ];

        if (true === $disableValidation) {
            $options['validation_groups'] = false;
        }

        return $options;
    }

    /**
     * Collects participant notifications and clears them from the DTO.
     *
     * @return array<array{type: string, message: string}>
     */
    public function collectAndClearNotifications(BookingDto $bookingDto): array
    {
        $notifications = [];

        foreach ($bookingDto->participants as $participant) {
            if (false === empty($participant->notifications)) {
                $notifications = array_merge($notifications, $participant->notifications);
                $participant->notifications = [];
            }
        }

        return array_values($notifications);
    }
}