<?php

declare(strict_types=1);

namespace App\Tests\Form\Service;

use App\BusProNet\Model\Insurance;
use App\BusProNet\Model\Travel;
use App\Form\Model\BookingCreateDto;
use App\Form\Model\ParticipantDto;
use App\Form\Service\ParticipantInsuranceFieldHandler;
use App\Service\InsuranceMatchingService;
use PHPUnit\Framework\TestCase;

class ParticipantInsuranceFieldHandlerTest extends TestCase
{
    private ParticipantInsuranceFieldHandler $handler;
    private InsuranceMatchingService $insuranceMatchingService;

    protected function setUp(): void
    {
        $this->insuranceMatchingService = $this->createMock(InsuranceMatchingService::class);
        $this->handler = new ParticipantInsuranceFieldHandler($this->insuranceMatchingService);
    }

    public function testGetFieldName(): void
    {
        $this->assertEquals('insurance', $this->handler->getFieldName());
    }

    public function testGetDependencies(): void
    {
        $dependencies = $this->handler->getDependencies();

        $this->assertEquals(['dateOfBirth'], $dependencies);
    }

    public function testShouldProcessAlwaysReturnsTrue(): void
    {
        $result = $this->handler->shouldProcess([], 0);

        $this->assertTrue($result);
    }

    public function testProcessFieldSetsInsuranceToNullWhenNoParticipant(): void
    {
        $bookingDto = $this->createMockBookingDto();
        $bookingDto->method('getParticipant')->with(0)->willReturn(null);

        $this->handler->processField(['insurance' => '123'], $bookingDto, 0);

        // No assertions needed - just ensure no exceptions are thrown
        $this->addToAssertionCount(1);
    }

    public function testProcessFieldClearsInsuranceWhenNullSelection(): void
    {
        $participant = new ParticipantDto();
        $participant->insurance = $this->createInsurance('123');

        $bookingDto = $this->createMockBookingDto();
        $bookingDto->method('getParticipant')->with(0)->willReturn($participant);

        $this->handler->processField(['insurance' => null], $bookingDto, 0);

        $this->assertNull($participant->insurance);
    }

    public function testProcessFieldClearsInsuranceWhenEmptyStringSelection(): void
    {
        $participant = new ParticipantDto();
        $participant->insurance = $this->createInsurance('123');

        $bookingDto = $this->createMockBookingDto();
        $bookingDto->method('getParticipant')->with(0)->willReturn($participant);

        $this->handler->processField(['insurance' => ''], $bookingDto, 0);

        $this->assertNull($participant->insurance);
    }

    public function testProcessFieldClearsInsuranceWhenMissingFromData(): void
    {
        $participant = new ParticipantDto();
        $participant->insurance = $this->createInsurance('123');

        $bookingDto = $this->createMockBookingDto();
        $bookingDto->method('getParticipant')->with(0)->willReturn($participant);

        $this->handler->processField([], $bookingDto, 0);

        $this->assertNull($participant->insurance);
    }

    public function testProcessFieldClearsInsuranceWhenNotFoundInAvailableInsurances(): void
    {
        $participant = new ParticipantDto();
        $travel = new Travel();
        $travel->insurances = [$this->createInsurance('456')]; // Different ID

        $bookingDto = $this->createMockBookingDto();
        $bookingDto->method('getParticipant')->with(0)->willReturn($participant);
        $bookingDto->travel = $travel;

        $this->handler->processField(['insurance' => '123'], $bookingDto, 0);

        $this->assertNull($participant->insurance);
    }

    public function testProcessFieldSetsInsuranceWhenEligible(): void
    {
        $insurance = $this->createInsurance('123');
        $participant = new ParticipantDto();
        $travel = new Travel();
        $travel->insurances = [$insurance];

        $bookingDto = $this->createMockBookingDto();
        $bookingDto->method('getParticipant')->with(0)->willReturn($participant);
        $bookingDto->travel = $travel;

        $this->insuranceMatchingService
            ->expects($this->once())
            ->method('getEligibleInsurances')
            ->with([$insurance], $participant, $bookingDto)
            ->willReturn([$insurance]);

        $this->handler->processField(['insurance' => '123'], $bookingDto, 0);

        $this->assertSame($insurance, $participant->insurance);
    }

    public function testProcessFieldClearsInsuranceWhenNotEligible(): void
    {
        $insurance = $this->createInsurance('123');
        $participant = new ParticipantDto();
        $travel = new Travel();
        $travel->insurances = [$insurance];

        $bookingDto = $this->createMockBookingDto();
        $bookingDto->method('getParticipant')->with(0)->willReturn($participant);
        $bookingDto->travel = $travel;

        $this->insuranceMatchingService
            ->expects($this->once())
            ->method('getEligibleInsurances')
            ->with([$insurance], $participant, $bookingDto)
            ->willReturn([]); // Not eligible

        $this->handler->processField(['insurance' => '123'], $bookingDto, 0);

        $this->assertNull($participant->insurance);
    }

    public function testProcessFieldWorksWithStringAndIntegerIds(): void
    {
        $insurance = $this->createInsurance(123); // Integer ID
        $participant = new ParticipantDto();
        $travel = new Travel();
        $travel->insurances = [$insurance];

        $bookingDto = $this->createMockBookingDto();
        $bookingDto->method('getParticipant')->with(0)->willReturn($participant);
        $bookingDto->travel = $travel;

        $this->insuranceMatchingService
            ->expects($this->once())
            ->method('getEligibleInsurances')
            ->willReturn([$insurance]);

        $this->handler->processField(['insurance' => '123'], $bookingDto, 0); // String selection

        $this->assertSame($insurance, $participant->insurance);
    }

    public function testProcessFieldHandlesEmptyInsurancesArray(): void
    {
        $participant = new ParticipantDto();
        $travel = new Travel();
        $travel->insurances = []; // No insurances available

        $bookingDto = $this->createMockBookingDto();
        $bookingDto->method('getParticipant')->with(0)->willReturn($participant);
        $bookingDto->travel = $travel;

        $this->handler->processField(['insurance' => '123'], $bookingDto, 0);

        $this->assertNull($participant->insurance);
    }

    public function testProcessFieldHandlesNullInsurancesProperty(): void
    {
        $participant = new ParticipantDto();
        $travel = new Travel();
        // $travel->insurances not set, defaults to []

        $bookingDto = $this->createMockBookingDto();
        $bookingDto->method('getParticipant')->with(0)->willReturn($participant);
        $bookingDto->travel = $travel;

        $this->handler->processField(['insurance' => '123'], $bookingDto, 0);

        $this->assertNull($participant->insurance);
    }

    public function testGetFieldStateModificationsReturnsEmptyArray(): void
    {
        $bookingDto = $this->createMockBookingDto();

        $result = $this->handler->getFieldStateModifications([], $bookingDto, 0);

        $this->assertIsArray($result);
        $this->assertEmpty($result);
    }

    public function testGetAffectedFieldNamesReturnsEmptyArray(): void
    {
        $result = $this->handler->getAffectedFieldNames();

        $this->assertIsArray($result);
        $this->assertEmpty($result);
    }

    private function createInsurance(string|int $id, string $label = 'Test Insurance'): Insurance
    {
        $insurance = new Insurance();
        $insurance->id = $id;
        $insurance->label = $label;

        return $insurance;
    }

    private function createMockBookingDto(): BookingCreateDto
    {
        return $this->createMock(BookingCreateDto::class);
    }
}