<?php

declare(strict_types=1);

namespace App\Tests\State;

use ApiPlatform\Metadata\Delete;
use ApiPlatform\Metadata\Patch;
use ApiPlatform\Metadata\Post;
use ApiPlatform\State\ProcessorInterface;
use App\Entity\Contract;
use App\Entity\Employee;
use App\Entity\EmployeeContractPeriod;
use App\Enum\ContractNature;
use App\Repository\Contract\EmployeeContractPeriodReadRepositoryInterface;
use App\Service\Contracts\EmployeeContractChangeRequestFactory;
use App\Service\Contracts\EmployeeContractPeriodManagerInterface;
use App\State\EmployeeWriteProcessor;
use DateTimeImmutable;
use Doctrine\ORM\EntityManagerInterface;
use Doctrine\ORM\UnitOfWork;
use PHPUnit\Framework\TestCase;
use ReflectionProperty;

/**
 * @internal
 */
final class EmployeeWriteProcessorTest extends TestCase
{
    public function testDelegatesCloseOnlyRequestToPeriodManager(): void
    {
        $employee = $this->buildEmployeeWithId(42);
        $employee->setContractEndDate('2026-03-05');
        $employee->setContractPaidLeaveSettled(true);
        $contract = $employee->getContract();
        self::assertInstanceOf(Contract::class, $contract);

        $todayPeriod = new EmployeeContractPeriod()
            ->setEmployee($employee)
            ->setContract($contract)
            ->setStartDate(new DateTimeImmutable('2026-03-01'))
            ->setEndDate(null)
            ->setContractNature(ContractNature::CDI)
        ;

        $persistProcessor     = $this->createMock(ProcessorInterface::class);
        $removeProcessor      = $this->createStub(ProcessorInterface::class);
        $entityManager        = $this->createStub(EntityManagerInterface::class);
        $periodRepository     = $this->createMock(EmployeeContractPeriodReadRepositoryInterface::class);
        $changeRequestFactory = new EmployeeContractChangeRequestFactory();
        $periodManager        = $this->createMock(EmployeeContractPeriodManagerInterface::class);

        $persistProcessor
            ->expects(self::once())
            ->method('process')
            ->willReturn($employee)
        ;
        $periodRepository
            ->expects(self::once())
            ->method('findOneCoveringDate')
            ->with($employee, self::isInstanceOf(DateTimeImmutable::class))
            ->willReturn($todayPeriod)
        ;
        $periodManager
            ->expects(self::once())
            ->method('closeCurrentPeriod')
            ->with(
                $todayPeriod,
                self::callback(static fn (DateTimeImmutable $value): bool => '2026-03-05' === $value->format('Y-m-d')),
                true
            )
        ;
        $periodManager
            ->expects(self::never())
            ->method('createNextPeriod')
        ;

        $this->mockOriginalContract($entityManager, $employee, $contract);

        $processor = new EmployeeWriteProcessor(
            $persistProcessor,
            $removeProcessor,
            $entityManager,
            $periodRepository,
            $changeRequestFactory,
            $periodManager
        );

        $result = $processor->process($employee, new Patch());

        self::assertSame($employee, $result);
    }

    public function testDelegatesNonCloseRequestToCreateNextPeriod(): void
    {
        $employee = $this->buildEmployeeWithId(43);
        $employee->setContractStartDate('2026-03-06');
        $contract = $employee->getContract();
        self::assertInstanceOf(Contract::class, $contract);

        $todayPeriod = new EmployeeContractPeriod()
            ->setEmployee($employee)
            ->setContract($contract)
            ->setStartDate(new DateTimeImmutable('2026-03-01'))
            ->setEndDate(null)
            ->setContractNature(ContractNature::CDI)
        ;

        $persistProcessor     = $this->createMock(ProcessorInterface::class);
        $removeProcessor      = $this->createStub(ProcessorInterface::class);
        $entityManager        = $this->createStub(EntityManagerInterface::class);
        $periodRepository     = $this->createMock(EmployeeContractPeriodReadRepositoryInterface::class);
        $changeRequestFactory = new EmployeeContractChangeRequestFactory();
        $periodManager        = $this->createMock(EmployeeContractPeriodManagerInterface::class);

        $persistProcessor
            ->expects(self::once())
            ->method('process')
            ->willReturn($employee)
        ;
        $periodRepository
            ->expects(self::once())
            ->method('findOneCoveringDate')
            ->with($employee, self::isInstanceOf(DateTimeImmutable::class))
            ->willReturn($todayPeriod)
        ;
        $periodManager
            ->expects(self::once())
            ->method('createNextPeriod')
            ->with(
                employee: $employee,
                contract: $contract,
                startDate: self::callback(static fn (DateTimeImmutable $value): bool => '2026-03-06' === $value->format('Y-m-d')),
                endDate: null,
                nature: ContractNature::CDI,
                todayPeriod: $todayPeriod
            )
        ;
        $periodManager
            ->expects(self::never())
            ->method('closeCurrentPeriod')
        ;

        $this->mockOriginalContract($entityManager, $employee, $contract);

        $processor = new EmployeeWriteProcessor(
            $persistProcessor,
            $removeProcessor,
            $entityManager,
            $periodRepository,
            $changeRequestFactory,
            $periodManager
        );

        $result = $processor->process($employee, new Patch());

        self::assertSame($employee, $result);
    }

    public function testSkipsPeriodOperationsWhenContractAndPeriodPayloadAreUnchanged(): void
    {
        $employee = $this->buildEmployeeWithId(44);
        $contract = $employee->getContract();
        self::assertInstanceOf(Contract::class, $contract);

        $persistProcessor     = $this->createMock(ProcessorInterface::class);
        $removeProcessor      = $this->createStub(ProcessorInterface::class);
        $entityManager        = $this->createStub(EntityManagerInterface::class);
        $periodRepository     = $this->createMock(EmployeeContractPeriodReadRepositoryInterface::class);
        $changeRequestFactory = new EmployeeContractChangeRequestFactory();
        $periodManager        = $this->createMock(EmployeeContractPeriodManagerInterface::class);

        $persistProcessor
            ->expects(self::once())
            ->method('process')
            ->willReturn($employee)
        ;
        $periodRepository->expects(self::never())->method('findOneCoveringDate');
        $periodManager->expects(self::never())->method('closeCurrentPeriod');
        $periodManager->expects(self::never())->method('createNextPeriod');

        $this->mockOriginalContract($entityManager, $employee, $contract);

        $processor = new EmployeeWriteProcessor(
            $persistProcessor,
            $removeProcessor,
            $entityManager,
            $periodRepository,
            $changeRequestFactory,
            $periodManager
        );

        $result = $processor->process($employee, new Patch());

        self::assertSame($employee, $result);
    }

    public function testSetsEntryDateOnNewEmployee(): void
    {
        $employee = new Employee();
        $employee->setFirstName('Jane');
        $employee->setLastName('Doe');
        $employee->setContractStartDate('2026-04-01');
        $employee->setContractNature('CDI');

        $contract = new Contract()
            ->setName('35h')
            ->setTrackingMode(Contract::TRACKING_TIME)
            ->setWeeklyHours(35)
        ;
        $employee->setContract($contract);

        $persistProcessor     = $this->createMock(ProcessorInterface::class);
        $removeProcessor      = $this->createStub(ProcessorInterface::class);
        $entityManager        = $this->createStub(EntityManagerInterface::class);
        $periodRepository     = $this->createStub(EmployeeContractPeriodReadRepositoryInterface::class);
        $changeRequestFactory = new EmployeeContractChangeRequestFactory();
        $periodManager        = $this->createMock(EmployeeContractPeriodManagerInterface::class);

        $persistProcessor
            ->expects(self::once())
            ->method('process')
            ->willReturn($employee)
        ;

        $periodManager
            ->expects(self::once())
            ->method('ensureContractPeriodExists')
        ;

        $processor = new EmployeeWriteProcessor(
            $persistProcessor,
            $removeProcessor,
            $entityManager,
            $periodRepository,
            $changeRequestFactory,
            $periodManager
        );

        $processor->process($employee, new Post());

        self::assertNotNull($employee->getEntryDate());
        self::assertSame('2026-04-01', $employee->getEntryDate()->format('Y-m-d'));
    }

    public function testDeleteOperationDelegatesToRemoveProcessor(): void
    {
        $employee = $this->buildEmployeeWithId(45);

        $persistProcessor     = $this->createMock(ProcessorInterface::class);
        $removeProcessor      = $this->createMock(ProcessorInterface::class);
        $entityManager        = $this->createStub(EntityManagerInterface::class);
        $periodRepository     = $this->createStub(EmployeeContractPeriodReadRepositoryInterface::class);
        $changeRequestFactory = new EmployeeContractChangeRequestFactory();
        $periodManager        = $this->createStub(EmployeeContractPeriodManagerInterface::class);

        $persistProcessor->expects(self::never())->method('process');
        $removeProcessor
            ->expects(self::once())
            ->method('process')
            ->with($employee, self::isInstanceOf(Delete::class), [], [])
            ->willReturn(null)
        ;

        $processor = new EmployeeWriteProcessor(
            $persistProcessor,
            $removeProcessor,
            $entityManager,
            $periodRepository,
            $changeRequestFactory,
            $periodManager
        );

        $result = $processor->process($employee, new Delete());

        self::assertNull($result);
    }

    private function buildEmployeeWithId(int $id): Employee
    {
        $contract = new Contract()
            ->setName('39h')
            ->setTrackingMode(Contract::TRACKING_TIME)
            ->setWeeklyHours(39)
        ;

        $employee = new Employee()
            ->setFirstName('John')
            ->setLastName('Doe')
            ->setContract($contract)
        ;

        $ref = new ReflectionProperty($employee, 'id');
        $ref->setValue($employee, $id);

        return $employee;
    }

    private function mockOriginalContract(EntityManagerInterface $entityManager, Employee $employee, Contract $contract): void
    {
        $unitOfWork = $this->createStub(UnitOfWork::class);
        $unitOfWork
            ->method('getOriginalEntityData')
            ->with($employee)
            ->willReturn(['contract' => $contract])
        ;

        $entityManager
            ->method('getUnitOfWork')
            ->willReturn($unitOfWork)
        ;
    }
}