<?php

namespace Tests\Unit\Element\UseCases;

use App\Element\CreateElementDto;
use App\Element\Element;
use App\Element\UseCases\GetElement\GetElement;
use App\Element\UseCases\GetElement\GetElementRequest;
use App\Exceptions\BadRequestException;
use App\Exceptions\NotFoundException;
use App\Set\Set as DomainSet;
use Tests\Fakes\FakeElementRepository;
use Tests\TestCase;

class GetElementTest extends TestCase
{
    private FakeElementRepository $elementRepo;

    private GetElement $getElement;

    protected function setUp(): void
    {
        $this->elementRepo = new FakeElementRepository();
        $this->getElement = new GetElement($this->elementRepo);
    }

    public function testReturnsElementWhenFound(): void
    {
        $set = $this->createSet(1, 'Baderech');
        $element = $this->createElement(
            $set,
            'Baderech HaAvodah',
            null,
        );

        $result = $this->getElement->execute(new GetElementRequest(
            id: $element->getId(),
        ));
        $foundElement = $result->getElement();

        $this->assertInstanceOf(Element::class, $foundElement);
        $this->assertSame($element->getId(), $foundElement->getId());
        $this->assertSame('Baderech HaAvodah', $foundElement->getTitle());
    }

    public function testReturnsDirectChildElements(): void
    {
        $set = $this->createSet(1, 'Baderech');
        $parentElement = $this->createElement(
            $set,
            'Baderech HaAvodah',
            null,
        );
        $firstChildElement = $this->createElement(
            $set,
            'Avodah Foundations',
            $parentElement,
        );
        $secondChildElement = $this->createElement(
            $set,
            'Daily Practice',
            $parentElement,
        );
        $this->createElement(
            $set,
            'Nested Practice',
            $firstChildElement,
        );
        $otherSet = $this->createSet(2, 'Daily Learning');
        $otherParentElement = $this->createElement(
            $otherSet,
            'Other Parent',
            null,
        );
        $this->createElement(
            $otherSet,
            'Other Child',
            $otherParentElement,
        );

        $result = $this->getElement->execute(new GetElementRequest(
            id: $parentElement->getId(),
        ));
        $childElements = $result->getChildElements();

        $this->assertCount(2, $childElements);
        $this->assertSame(
            $firstChildElement->getId(),
            $childElements[0]->getId(),
        );
        $this->assertSame('Avodah Foundations', $childElements[0]->getTitle());
        $this->assertSame(
            $secondChildElement->getId(),
            $childElements[1]->getId(),
        );
        $this->assertSame('Daily Practice', $childElements[1]->getTitle());
    }

    public function testThrowsWhenIdMissing(): void
    {
        $this->expectException(BadRequestException::class);
        $this->expectExceptionMessage('id is required');

        $this->getElement->execute(new GetElementRequest(id: null));
    }

    public function testThrowsWhenElementDoesNotExist(): void
    {
        $this->expectException(NotFoundException::class);
        $this->expectExceptionMessage('Element not found');

        $this->getElement->execute(new GetElementRequest(id: 999));
    }

    private function createSet(int $id, string $name): DomainSet
    {
        return new DomainSet(
            id: $id,
            name: $name,
            description: "$name description",
            iconImageUrl: '/assets/baderech-icon.png',
        );
    }

    private function createElement(
        DomainSet $set,
        string $title,
        ?Element $parentElement,
    ): Element {
        return $this->elementRepo->create(new CreateElementDto(
            set: $set,
            title: $title,
            parentElement: $parentElement,
        ));
    }
}