<?php

declare(strict_types=1);

namespace App\Framework\Http\Session;

/**
 * This class provides functionality to store, retrieve, and manage form data
 * in a session-based storage.
 */
final readonly class FormDataStorage
{
    public function __construct(
        private Session $session
    ){
        // Sicherstellen, dass Formulardatenbereich existiert
        if (!$this->session->has(SessionKey::FORM_DATA->value)) {
            $this->session->set(SessionKey::FORM_DATA->value, []);
        }
    }

    public function store(string $formId, array $data): void
    {
        $formData = $this->session->get(SessionKey::FORM_DATA->value, []);
        $formData[$formId] = $data;
        $this->session->set(SessionKey::FORM_DATA->value, $formData);
    }

    public function get(string $formId): array
    {
        $formData = $this->session->get(SessionKey::FORM_DATA->value, []);
        return $formData[$formId] ?? [];
    }

    public function getField(string $formId, string $field, $default = null)
    {
        $data = $this->get($formId);
        return $data[$field] ?? $default;
    }

    public function has(string $formId): bool
    {
        $formData = $this->session->get(SessionKey::FORM_DATA->value, []);
        return !empty($formData[$formId]);
    }

    public function clear(string $formId): void
    {
        $formData = $this->session->get(SessionKey::FORM_DATA->value, []);

        if (isset($formData[$formId])) {
            unset($formData[$formId]);
            $this->session->set(SessionKey::FORM_DATA->value, $formData);
        }
    }

    public function clearAll(): void
    {
        $this->session->set(SessionKey::FORM_DATA->value, []);
    }
}