<?php

namespace Tests\e2e\Controllers;

use App\Node\CreateNodeDto;
use App\Node\NodeController;
use App\Node\UseCases\BulkCreateNodes;
use App\Text\CreateTextDto;
use App\User\UseCases\CreateUserDto;
use App\User\User;
use App\ValueObjects\EmailAddress;
use PHPUnit\Framework\TestCase;
use Psr\Http\Message\ServerRequestInterface;
use Slim\Psr7\Factory\ServerRequestFactory;
use Slim\Psr7\Factory\StreamFactory;
use Slim\Psr7\Response;
use Tests\Fakes\FakeNodeRepository;
use Tests\Fakes\FakeTextRepository;
use Tests\Fakes\FakeUserRepository;

class BulkCreateNodesControllerTest extends TestCase
{
    private FakeTextRepository $textRepo;
    private FakeNodeRepository $nodeRepo;
    private BulkCreateNodes $useCase;
    private NodeController $controller;
    private User $user;
    private User $otherUser;
    private User $admin;

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

        $this->nodeRepo = new FakeNodeRepository();
        $this->nodeRepo->create(new CreateNodeDto(
            text: $text,
            title: 'Root Node',
            parentNode: null,
        ));
        $this->useCase = new BulkCreateNodes(
            $this->nodeRepo,
            $this->textRepo
        );
        $this->controller = new NodeController(
            $this->nodeRepo,
            $this->textRepo
        );
    }

    private function makeRequest(
        array $data,
        User $user,
    ): ServerRequestInterface {
        $body = new StreamFactory()->createStream(json_encode($data));
        $request = new ServerRequestFactory()
            ->createServerRequest('POST', 'http://localhost/api/nodes/bulk')
            ->withHeader('Content-Type', 'application/json')
            ->withBody($body);
        return $request->withAttribute('user', $user);
    }

    public function test_bulk_create_nodes_returns_201_with_created_nodes(): void
    {
        $response = $this->controller->bulkCreateNodes(
            $this->makeRequest(
                [
                    'textId' => 0,
                    'parentNodeId' => 0,
                    'titlePrefix' => 'Page',
                    'count' => 3,
                ],
                $this->user,
            ),
            new Response(),
            $this->useCase,
        );

        $this->assertEquals(201, $response->getStatusCode());
        $body = json_decode($response->getBody(), true);
        $this->assertIsArray($body);
    }

    public function test_bulk_create_nodes_returns_correct_count(): void
    {
        $response = $this->controller->bulkCreateNodes(
            $this->makeRequest(
                [
                    'textId' => 0,
                    'parentNodeId' => 0,
                    'titlePrefix' => 'Page',
                    'count' => 10,
                ],
                $this->user,
            ),
            new Response(),
            $this->useCase,
        );

        $body = json_decode($response->getBody(), true);
        $this->assertCount(10, $body);
    }

    public function test_bulk_create_nodes_returns_correct_titles(): void
    {
        $response = $this->controller->bulkCreateNodes(
            $this->makeRequest(
                [
                    'textId' => 0,
                    'parentNodeId' => 0,
                    'titlePrefix' => 'Chapter',
                    'count' => 3,
                ],
                $this->user,
            ),
            new Response(),
            $this->useCase,
        );

        $body = json_decode($response->getBody(), true);
        $this->assertEquals('Chapter 1', $body[0]['title']);
        $this->assertEquals('Chapter 2', $body[1]['title']);
        $this->assertEquals('Chapter 3', $body[2]['title']);
    }

    public function test_bulk_create_nodes_response_includes_id_and_parent_node_id(): void
    {
        $response = $this->controller->bulkCreateNodes(
            $this->makeRequest(
                [
                    'textId' => 0,
                    'parentNodeId' => 0,
                    'titlePrefix' => 'Page',
                    'count' => 2,
                ],
                $this->user,
            ),
            new Response(),
            $this->useCase,
        );

        $body = json_decode($response->getBody(), true);
        $this->assertArrayHasKey('id', $body[0]);
        $this->assertEquals(0, $body[0]['parentNodeId']);
    }

    public function test_bulk_create_nodes_returns_400_when_title_prefix_missing(): void
    {
        $response = $this->controller->bulkCreateNodes(
            $this->makeRequest(
                [
                    'textId' => 0,
                    'parentNodeId' => 0,
                    'count' => 5,
                ],
                $this->user,
            ),
            new Response(),
            $this->useCase,
        );

        $this->assertEquals(400, $response->getStatusCode());
    }

    public function test_bulk_create_nodes_returns_400_when_count_is_zero(): void
    {
        $response = $this->controller->bulkCreateNodes(
            $this->makeRequest(
                [
                    'textId' => 0,
                    'parentNodeId' => 0,
                    'titlePrefix' => 'Page',
                    'count' => 0,
                ],
                $this->user,
            ),
            new Response(),
            $this->useCase,
        );

        $this->assertEquals(400, $response->getStatusCode());
    }

    public function test_bulk_create_nodes_returns_400_when_count_is_missing(): void
    {
        $response = $this->controller->bulkCreateNodes(
            $this->makeRequest(
                [
                    'textId' => 0,
                    'parentNodeId' => 0,
                    'titlePrefix' => 'Page',
                ],
                $this->user,
            ),
            new Response(),
            $this->useCase,
        );

        $this->assertEquals(400, $response->getStatusCode());
    }

    public function test_bulk_create_nodes_returns_400_when_parent_node_id_missing(): void
    {
        $response = $this->controller->bulkCreateNodes(
            $this->makeRequest(
                [
                    'textId' => 0,
                    'titlePrefix' => 'Page',
                    'count' => 5,
                ],
                $this->user,
            ),
            new Response(),
            $this->useCase,
        );

        $this->assertEquals(400, $response->getStatusCode());
    }

    public function test_bulk_create_nodes_returns_404_when_text_not_found(): void
    {
        $response = $this->controller->bulkCreateNodes(
            $this->makeRequest(
                [
                    'textId' => 99,
                    'parentNodeId' => 0,
                    'titlePrefix' => 'Page',
                    'count' => 5,
                ],
                $this->user,
            ),
            new Response(),
            $this->useCase,
        );

        $this->assertEquals(404, $response->getStatusCode());
    }

    public function test_bulk_create_nodes_returns_404_when_parent_node_not_found(): void
    {
        $response = $this->controller->bulkCreateNodes(
            $this->makeRequest(
                [
                    'textId' => 0,
                    'parentNodeId' => 99,
                    'titlePrefix' => 'Page',
                    'count' => 5,
                ],
                $this->user,
            ),
            new Response(),
            $this->useCase,
        );

        $this->assertEquals(404, $response->getStatusCode());
    }

    public function test_bulk_create_nodes_returns_403_when_not_owner(): void
    {
        $response = $this->controller->bulkCreateNodes(
            $this->makeRequest(
                [
                    'textId' => 0,
                    'parentNodeId' => 0,
                    'titlePrefix' => 'Page',
                    'count' => 3,
                ],
                $this->otherUser,
            ),
            new Response(),
            $this->useCase,
        );

        $this->assertEquals(403, $response->getStatusCode());
    }

    public function test_bulk_create_nodes_allows_admin_on_any_text(): void
    {
        $response = $this->controller->bulkCreateNodes(
            $this->makeRequest(
                [
                    'textId' => 0,
                    'parentNodeId' => 0,
                    'titlePrefix' => 'Page',
                    'count' => 2,
                ],
                $this->admin,
            ),
            new Response(),
            $this->useCase,
        );

        $this->assertEquals(201, $response->getStatusCode());
    }
}