sfp_api_laravel_serprati/app/Rules/ExactAdvanceDays.php

<?php

namespace App\Rules;

use Carbon\Carbon;
use Closure;
use Illuminate\Contracts\Validation\ValidationRule;

/**
 * Regra oficial da consulta: a data precisa estar exatamente N dias à frente de hoje.
 * A comparação ignora horas — só a data conta.
 */
class ExactAdvanceDays implements ValidationRule
{
    public function __construct(private int $days) {}

    public function validate(string $attribute, mixed $value, Closure $fail): void
    {
        try {
            $date = Carbon::parse($value)->startOfDay();
        } catch (\Throwable) {
            $fail(__('validation.date', ['attribute' => $attribute]));
            return;
        }

        $expected = Carbon::today()->addDays($this->days);

        if (!$date->equalTo($expected)) {
            $fail(__('validation.exact_advance_days', [
                'days' => $this->days,
                'date' => $expected->format('d/m/Y'),
            ]));
        }
    }
}