<?php

namespace Tests\Unit\Node\UseCases;

use App\Exceptions\BadRequestException;
use App\Node\CreateNodeDto;
use App\Node\Node;
use App\Node\UseCases\BulkCreateNodes;
use App\Node\UseCases\BulkCreateNodesRequest;
use App\Text\CreateTextDto;
use App\User\UseCases\CreateUserDto;
use App\ValueObjects\EmailAddress;
use DomainException;
use PHPUnit\Framework\TestCase;
use Tests\Fakes\FakeNodeRepository;
use Tests\Fakes\FakeTextRepository;
use Tests\Fakes\FakeUserRepository;

class BulkCreateNodesTest extends TestCase
{
    private FakeTextRepository $textRepo;
    private FakeNodeRepository $nodeRepo;
    private BulkCreateNodes $useCase;
    private Node $parentNode;

    public function setUp(): void
    {
        $userRepo = new FakeUserRepository();
        $user = $userRepo->create(new CreateUserDto(
            email: new EmailAddress('a@b.com'),
            passwordHash: '',
            isAdmin: false,
        ));
        $this->textRepo = new FakeTextRepository();
        $this->textRepo->create(new CreateTextDto(name: 'text', user: $user));

        $this->nodeRepo = new FakeNodeRepository();
        $text = $this->textRepo->find(0);
        $this->parentNode = $this->nodeRepo->create(new CreateNodeDto(
            text: $text,
            title: 'Root',
            parentNode: null,
        ));

        $this->useCase = new BulkCreateNodes(
            nodeRepo: $this->nodeRepo,
            textRepo: $this->textRepo,
        );
    }

    public function test_creates_correct_number_of_nodes(): void
    {
        $nodes = $this->useCase->execute(new BulkCreateNodesRequest(
            textId: 0,
            parentNodeId: $this->parentNode->getId(),
            titlePrefix: 'Page',
            count: 5,
        ));

        $this->assertCount(5, $nodes);
    }

    public function test_nodes_have_correct_titles(): void
    {
        $nodes = $this->useCase->execute(new BulkCreateNodesRequest(
            textId: 0,
            parentNodeId: $this->parentNode->getId(),
            titlePrefix: 'Page',
            count: 3,
        ));

        $this->assertEquals('Page 1', $nodes[0]->getTitle());
        $this->assertEquals('Page 2', $nodes[1]->getTitle());
        $this->assertEquals('Page 3', $nodes[2]->getTitle());
    }

    public function test_nodes_have_correct_parent(): void
    {
        $nodes = $this->useCase->execute(new BulkCreateNodesRequest(
            textId: 0,
            parentNodeId: $this->parentNode->getId(),
            titlePrefix: 'Page',
            count: 3,
        ));

        foreach ($nodes as $node) {
            $this->assertEquals($this->parentNode->getId(), $node->getParentNode()->getId());
        }
    }

    public function test_nodes_belong_to_text(): void
    {
        $nodes = $this->useCase->execute(new BulkCreateNodesRequest(
            textId: 0,
            parentNodeId: $this->parentNode->getId(),
            titlePrefix: 'Page',
            count: 3,
        ));

        foreach ($nodes as $node) {
            $this->assertEquals(0, $node->getText()->getId());
        }
    }

    public function test_returns_array_of_node_instances(): void
    {
        $nodes = $this->useCase->execute(new BulkCreateNodesRequest(
            textId: 0,
            parentNodeId: $this->parentNode->getId(),
            titlePrefix: 'Chapter',
            count: 2,
        ));

        foreach ($nodes as $node) {
            $this->assertInstanceOf(Node::class, $node);
        }
    }

    public function test_throws_if_text_doesnt_exist(): void
    {
        $this->expectException(DomainException::class);
        $this->expectExceptionMessage("Text with id: 99 doesnt exist");

        $this->useCase->execute(new BulkCreateNodesRequest(
            textId: 99,
            parentNodeId: $this->parentNode->getId(),
            titlePrefix: 'Page',
            count: 5,
        ));
    }

    public function test_throws_if_parent_node_doesnt_exist(): void
    {
        $this->expectException(DomainException::class);
        $this->expectExceptionMessage("Node with id: 99 doesnt exist");

        $this->useCase->execute(new BulkCreateNodesRequest(
            textId: 0,
            parentNodeId: 99,
            titlePrefix: 'Page',
            count: 5,
        ));
    }

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

        $this->useCase->execute(new BulkCreateNodesRequest(
            textId: null,
            parentNodeId: $this->parentNode->getId(),
            titlePrefix: 'Page',
            count: 5,
        ));
    }

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

        $this->useCase->execute(new BulkCreateNodesRequest(
            textId: 0,
            parentNodeId: null,
            titlePrefix: 'Page',
            count: 5,
        ));
    }

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

        $this->useCase->execute(new BulkCreateNodesRequest(
            textId: 0,
            parentNodeId: $this->parentNode->getId(),
            titlePrefix: null,
            count: 5,
        ));
    }

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

        $this->useCase->execute(new BulkCreateNodesRequest(
            textId: 0,
            parentNodeId: $this->parentNode->getId(),
            titlePrefix: 'Page',
            count: null,
        ));
    }

    public function test_throws_if_count_is_less_than_one(): void
    {
        $this->expectException(BadRequestException::class);
        $this->expectExceptionMessage('count must be at least 1');

        $this->useCase->execute(new BulkCreateNodesRequest(
            textId: 0,
            parentNodeId: $this->parentNode->getId(),
            titlePrefix: 'Page',
            count: 0,
        ));
    }
}