<?php

declare(strict_types=1);

namespace App\State;

use ApiPlatform\Metadata\Operation;
use ApiPlatform\State\ProcessorInterface;
use App\ApiResource\EmployeeRttPaymentInput;
use App\Entity\Employee;
use App\Entity\EmployeeRttPayment;
use App\Repository\EmployeeRepository;
use App\Repository\EmployeeRttPaymentRepository;
use DateTimeImmutable;
use Doctrine\ORM\EntityManagerInterface;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
use Symfony\Component\HttpKernel\Exception\UnprocessableEntityHttpException;

final readonly class EmployeeRttPaymentProcessor implements ProcessorInterface
{
    public function __construct(
        private EmployeeRepository $employeeRepository,
        private EmployeeRttPaymentRepository $rttPaymentRepository,
        private EntityManagerInterface $entityManager,
    ) {}

    public function process(mixed $data, Operation $operation, array $uriVariables = [], array $context = []): EmployeeRttPaymentInput
    {
        if (!$data instanceof EmployeeRttPaymentInput) {
            throw new UnprocessableEntityHttpException('Invalid payload.');
        }

        $employeeId = (int) ($uriVariables['id'] ?? 0);
        if ($employeeId <= 0) {
            throw new UnprocessableEntityHttpException('id must be a positive integer.');
        }

        $employee = $this->employeeRepository->find($employeeId);
        if (!$employee instanceof Employee) {
            throw new NotFoundHttpException('Employee not found.');
        }

        if ($data->month < 1 || $data->month > 12) {
            throw new UnprocessableEntityHttpException('month must be between 1 and 12.');
        }

        $year = $data->year ?? $this->resolveCurrentExerciseYear();

        $payment = $this->rttPaymentRepository->findOneByEmployeeYearMonth($employee, $year, $data->month);

        if (null === $payment) {
            $payment = new EmployeeRttPayment();
            $payment->setEmployee($employee);
            $payment->setYear($year);
            $payment->setMonth($data->month);
            $this->entityManager->persist($payment);
        }

        $payment->setBase25Minutes($data->base25Minutes);
        $payment->setBonus25Minutes($data->bonus25Minutes);
        $payment->setBase50Minutes($data->base50Minutes);
        $payment->setBonus50Minutes($data->bonus50Minutes);
        $payment->touch();
        $this->entityManager->flush();

        $data->year = $year;

        return $data;
    }

    private function resolveCurrentExerciseYear(): int
    {
        $today = new DateTimeImmutable('today');
        $year  = (int) $today->format('Y');
        $month = (int) $today->format('n');

        return $month >= 6 ? $year + 1 : $year;
    }
}