<?php

declare(strict_types=1);

namespace App\Tests\Form\Model;

use App\BusProNet\Model\Insurance;
use App\Form\Model\ParticipantDto;
use PHPUnit\Framework\TestCase;

class ParticipantDtoTest extends TestCase
{
    public function testGetAgeReturnsNullWhenDateOfBirthIsNull(): void
    {
        $participant = new ParticipantDto();
        $participant->dateOfBirth = null;

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

    public function testGetAgeCalculatesCurrentAgeWhenNoReferenceDateProvided(): void
    {
        $participant = new ParticipantDto();
        $participant->dateOfBirth = new \DateTimeImmutable('1990-06-15');

        $expectedAge = (new \DateTimeImmutable())->diff($participant->dateOfBirth)->y;
        $actualAge = $participant->getAge();

        $this->assertEquals($expectedAge, $actualAge);
    }

    public function testGetAgeCalculatesAgeAtSpecificReferenceDate(): void
    {
        $participant = new ParticipantDto();
        $participant->dateOfBirth = new \DateTimeImmutable('1990-06-15');
        $referenceDate = new \DateTimeImmutable('2024-06-14'); // Day before 34th birthday

        $result = $participant->getAge($referenceDate);

        $this->assertEquals(33, $result); // Still 33 years old
    }

    public function testGetAgeCalculatesAgeAtSpecificReferenceDateAfterBirthday(): void
    {
        $participant = new ParticipantDto();
        $participant->dateOfBirth = new \DateTimeImmutable('1990-06-15');
        $referenceDate = new \DateTimeImmutable('2024-06-15'); // Exactly 34th birthday

        $result = $participant->getAge($referenceDate);

        $this->assertEquals(34, $result); // Now 34 years old
    }

    public function testGetAgeCalculatesAgeForInsuranceEligibilityScenario(): void
    {
        // Travel starts on 2024-08-01, participant born 1989-12-25
        $participant = new ParticipantDto();
        $participant->dateOfBirth = new \DateTimeImmutable('1989-12-25');
        $travelStartDate = new \DateTimeImmutable('2024-08-01');

        $result = $participant->getAge($travelStartDate);

        // On 2024-08-01, they are still 34 (birthday not yet reached)
        $this->assertEquals(34, $result);
    }

    public function testGetAgeCalculatesAgeForInsuranceEligibilityScenarioAfterBirthday(): void
    {
        // Travel starts on 2024-12-26, participant born 1989-12-25
        $participant = new ParticipantDto();
        $participant->dateOfBirth = new \DateTimeImmutable('1989-12-25');
        $travelStartDate = new \DateTimeImmutable('2024-12-26');

        $result = $participant->getAge($travelStartDate);

        // On 2024-12-26, they just turned 35
        $this->assertEquals(35, $result);
    }

    public function testGetAgeHandlesLeapYearScenarios(): void
    {
        // Born on Feb 29, 2000 (leap year)
        $participant = new ParticipantDto();
        $participant->dateOfBirth = new \DateTimeImmutable('2000-02-29');
        $referenceDate = new \DateTimeImmutable('2023-02-28'); // Non-leap year

        $result = $participant->getAge($referenceDate);

        $this->assertEquals(22, $result); // Still 22, birthday is technically next day
    }

    public function testGetAgeReturnsNullWithReferenceDateWhenDateOfBirthIsNull(): void
    {
        $participant = new ParticipantDto();
        $participant->dateOfBirth = null;
        $referenceDate = new \DateTimeImmutable('2024-08-01');

        $result = $participant->getAge($referenceDate);

        $this->assertNull($result);
    }

    public function testGetAgeWithYoungParticipant(): void
    {
        // Child born in 2020
        $participant = new ParticipantDto();
        $participant->dateOfBirth = new \DateTimeImmutable('2020-03-15');
        $referenceDate = new \DateTimeImmutable('2024-08-01');

        $result = $participant->getAge($referenceDate);

        $this->assertEquals(4, $result);
    }

    public function testGetAgeWithElderlyParticipant(): void
    {
        // Elderly participant born in 1940
        $participant = new ParticipantDto();
        $participant->dateOfBirth = new \DateTimeImmutable('1940-05-20');
        $referenceDate = new \DateTimeImmutable('2024-08-01');

        $result = $participant->getAge($referenceDate);

        $this->assertEquals(84, $result);
    }

    public function testHasInsuranceReturnsFalseWhenNoInsuranceSelected(): void
    {
        $participant = new ParticipantDto();
        $participant->insurance = null;

        $result = $participant->hasInsuranceSelected();

        $this->assertFalse($result);
    }

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

        $result = $participant->hasInsuranceSelected();

        $this->assertTrue($result);
    }

    public function testGetInsuranceLabelReturnsNullWhenNoInsurance(): void
    {
        $participant = new ParticipantDto();
        $participant->insurance = null;

        $result = $participant->getInsuranceLabel();

        $this->assertNull($result);
    }

    public function testGetInsuranceLabelReturnsLabelWhenInsuranceSelected(): void
    {
        $participant = new ParticipantDto();
        $participant->insurance = $this->createInsurance('Reise-Rücktritt');

        $result = $participant->getInsuranceLabel();

        $this->assertEquals('Reise-Rücktritt', $result);
    }

    public function testGetInsurancePriceReturnsZeroWhenNoInsurance(): void
    {
        $participant = new ParticipantDto();
        $participant->insurance = null;

        $result = $participant->getInsurancePrice();

        $this->assertEquals(0.0, $result);
    }

    public function testGetInsurancePriceReturnsPriceWhenInsuranceSelected(): void
    {
        $participant = new ParticipantDto();
        $participant->insurance = $this->createInsurance('Travel Insurance', 25.50);

        $result = $participant->getInsurancePrice();

        $this->assertEquals(25.50, $result);
    }

    public function testGetInsurancePriceReturnsZeroWhenInsuranceHasNullPrice(): void
    {
        $participant = new ParticipantDto();
        $insurance = $this->createInsurance('Free Insurance');
        $insurance->price = null;
        $participant->insurance = $insurance;

        $result = $participant->getInsurancePrice();

        $this->assertEquals(0.0, $result);
    }

    private function createInsurance(string $label = 'Test Insurance', float $price = 10.0): Insurance
    {
        $insurance = new Insurance();
        $insurance->label = $label;
        $insurance->price = $price;

        return $insurance;
    }
}