<?php

namespace Tests\Feature\Element;

use App\Element\CreateElementDto;
use App\Element\ElementRepository;
use App\Set\CreateSetDto;
use App\Set\CreateSetLevelDto;
use App\Set\Set;
use App\Set\SetLevel;
use App\Set\SetLevelRepository;
use App\Set\SetRepository;
use App\Shared\ValueObject\EmailAddress;
use App\User\CreateUserDto;
use App\User\UserRepository;
use DomainException;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Tests\TestCase;

class EloquentElementRepositoryTest extends TestCase
{
    use RefreshDatabase;

    public function testItPersistsNestedElementsInSiblingOrder(): void
    {
        $set = $this->createSet('Bible');
        $repository = app(ElementRepository::class);
        $bookLevel = $this->createLevel($set, 'book');
        $portionLevel = $this->createLevel($set, 'portion');
        $genesisBook = $repository->create(new CreateElementDto(
            name: 'Genesis',
            level: $bookLevel,
            parentElement: null,
        ));
        $exodusBook = $repository->create(new CreateElementDto(
            name: 'Exodus',
            level: $bookLevel,
            parentElement: null,
        ));
        $genesisPortion = $repository->create(new CreateElementDto(
            name: 'Genesis',
            level: $portionLevel,
            parentElement: $genesisBook,
        ));
        $noahPortion = $repository->create(new CreateElementDto(
            name: 'Noah',
            level: $portionLevel,
            parentElement: $genesisBook,
        ));

        $this->assertSame(1, $genesisBook->getPosition());
        $this->assertSame(2, $exodusBook->getPosition());
        $this->assertSame(1, $genesisPortion->getPosition());
        $this->assertSame(2, $noahPortion->getPosition());
        $this->assertDatabaseHas('elements', [
            'id' => $genesisPortion->getId(),
            'set_level_id' => $portionLevel->getId(),
            'name' => 'Genesis',
            'parent_element_id' => $genesisBook->getId(),
            'position' => 1,
        ]);

        $foundElement = $repository->find($noahPortion->getId());

        $this->assertNotNull($foundElement);
        $this->assertSame('Noah', $foundElement->getName());
        $this->assertSame('portion', $foundElement->getKind());
        $this->assertSame(
            $portionLevel->getId(),
            $foundElement->getLevel()->getId(),
        );
        $this->assertSame($set->getId(), $foundElement->getSet()->getId());
        $this->assertSame(
            $genesisBook->getId(),
            $foundElement->getParentElement()?->getId(),
        );
    }

    public function testItRejectsAParentFromAnotherSet(): void
    {
        $bible = $this->createSet('Bible');
        $course = $this->createSet('Course');
        $repository = app(ElementRepository::class);
        $bookLevel = $this->createLevel($bible, 'book');
        $moduleLevel = $this->createLevel($course, 'module');
        $book = $repository->create(new CreateElementDto(
            name: 'Genesis',
            level: $bookLevel,
            parentElement: null,
        ));

        $this->expectException(DomainException::class);
        $this->expectExceptionMessage(
            'parent element must belong to the same set',
        );

        $repository->create(new CreateElementDto(
            name: 'Invalid lesson',
            level: $moduleLevel,
            parentElement: $book,
        ));
    }

    public function testItRejectsARootOutsideTheFirstLevel(): void
    {
        $set = $this->createSet('Bible');
        $this->createLevel($set, 'book');
        $portionLevel = $this->createLevel($set, 'portion');

        $this->expectException(DomainException::class);
        $this->expectExceptionMessage(
            'root element must use the first set level',
        );

        app(ElementRepository::class)->create(new CreateElementDto(
            name: 'Creation',
            level: $portionLevel,
            parentElement: null,
        ));
    }

    public function testItRejectsAChildOutsideTheNextLevel(): void
    {
        $set = $this->createSet('Bible');
        $bookLevel = $this->createLevel($set, 'book');
        $this->createLevel($set, 'portion');
        $chapterLevel = $this->createLevel($set, 'chapter');
        $repository = app(ElementRepository::class);
        $book = $repository->create(new CreateElementDto(
            name: 'Genesis',
            level: $bookLevel,
            parentElement: null,
        ));

        $this->expectException(DomainException::class);
        $this->expectExceptionMessage(
            'child element must use the next set level',
        );

        $repository->create(new CreateElementDto(
            name: 'Chapter 1',
            level: $chapterLevel,
            parentElement: $book,
        ));
    }

    public function testItListsOrderedElementsWithinTheirTreeScope(): void
    {
        $bible = $this->createSet('Bible');
        $course = $this->createSet('Course');
        $repository = app(ElementRepository::class);
        $bookLevel = $this->createLevel($bible, 'book');
        $portionLevel = $this->createLevel($bible, 'portion');
        $moduleLevel = $this->createLevel($course, 'module');
        $genesisBook = $repository->create(new CreateElementDto(
            name: 'Genesis',
            level: $bookLevel,
            parentElement: null,
        ));
        $exodusBook = $repository->create(new CreateElementDto(
            name: 'Exodus',
            level: $bookLevel,
            parentElement: null,
        ));
        $repository->create(new CreateElementDto(
            name: 'Module 1',
            level: $moduleLevel,
            parentElement: null,
        ));
        $repository->create(new CreateElementDto(
            name: 'Genesis',
            level: $portionLevel,
            parentElement: $genesisBook,
        ));
        $repository->create(new CreateElementDto(
            name: 'Noah',
            level: $portionLevel,
            parentElement: $genesisBook,
        ));
        $repository->create(new CreateElementDto(
            name: 'Shemot',
            level: $portionLevel,
            parentElement: $exodusBook,
        ));

        $topLevelElements = $repository->findTopLevelBySet($bible);
        $childElements = $repository->findByParentElement($genesisBook);

        $this->assertSame(
            ['Genesis', 'Exodus'],
            array_map(function ($element): string {
                return $element->getName();
            }, $topLevelElements),
        );
        $this->assertSame(
            ['Genesis', 'Noah'],
            array_map(function ($element): string {
                return $element->getName();
            }, $childElements),
        );
    }

    public function testItListsEveryElementForASet(): void
    {
        $bible = $this->createSet('Bible');
        $course = $this->createSet('Course');
        $repository = app(ElementRepository::class);
        $bookLevel = $this->createLevel($bible, 'book');
        $portionLevel = $this->createLevel($bible, 'portion');
        $moduleLevel = $this->createLevel($course, 'module');
        $genesis = $repository->create(new CreateElementDto(
            name: 'Genesis',
            level: $bookLevel,
            parentElement: null,
        ));
        $repository->create(new CreateElementDto(
            name: 'Creation',
            level: $portionLevel,
            parentElement: $genesis,
        ));
        $repository->create(new CreateElementDto(
            name: 'Foundations',
            level: $moduleLevel,
            parentElement: null,
        ));

        $elements = $repository->findBySet($bible);

        $this->assertSame(
            ['Genesis', 'Creation'],
            array_map(function ($element): string {
                return $element->getName();
            }, $elements),
        );
        $this->assertNull($elements[0]->getParentElement());
        $this->assertSame(
            $genesis->getId(),
            $elements[1]->getParentElement()?->getId(),
        );
    }

    private function createSet(string $name): Set
    {
        $creator = app(UserRepository::class)->create(new CreateUserDto(
            email: new EmailAddress(strtolower($name) . '@example.com'),
            passwordHash: 'hashed-password',
        ));

        return app(SetRepository::class)->create(new CreateSetDto(
            name: $name,
            creator: $creator,
        ));
    }

    private function createLevel(Set $set, string $kind): SetLevel
    {
        return app(SetLevelRepository::class)->create(new CreateSetLevelDto(
            set: $set,
            kind: $kind,
        ));
    }
}