<?php

declare(strict_types=1);

namespace Tests\Unit\Services;

use App\Exceptions\BookProviderException;
use App\Services\OpenLibraryService;
use GuzzleHttp\Client;
use GuzzleHttp\Handler\MockHandler;
use GuzzleHttp\HandlerStack;
use GuzzleHttp\Psr7\Response;
use Tests\TestCase;

class OpenLibraryServiceTest extends TestCase
{
    public function test_search_books_normalizes_docs_payload(): void
    {
        $mock = new MockHandler([
            new Response(200, [], json_encode([
                'docs' => [[
                    'key' => '/works/OL123W',
                    'title' => 'Refactoring',
                    'author_name' => ['Martin Fowler'],
                    'isbn' => ['9780201485677', '0201485672'],
                    'publisher' => ['Addison-Wesley'],
                    'first_publish_year' => 1999,
                    'cover_i' => 54321,
                ]],
            ])),
        ]);

        $service = new OpenLibraryService(
            new Client(['handler' => HandlerStack::create($mock)])
        );

        $books = $service->searchBooks('refactoring');

        $this->assertCount(1, $books);
        $this->assertSame('Refactoring', $books[0]['title']);
        $this->assertSame('Martin Fowler', $books[0]['author']);
        $this->assertSame('9780201485677', $books[0]['isbn']);
        $this->assertSame('0201485672', $books[0]['ean']);
        $this->assertSame('openlibrary:9780201485677', $books[0]['asin']);
    }

    public function test_find_by_isbn_normalizes_payload(): void
    {
        $mock = new MockHandler([
            new Response(200, [], json_encode([
                'title' => 'Clean Architecture',
                'authors' => [['name' => 'Robert C. Martin']],
                'publish_date' => '2017-09-20',
                'publishers' => ['Prentice Hall'],
                'covers' => [12345],
            ])),
        ]);

        $service = new OpenLibraryService(
            new Client(['handler' => HandlerStack::create($mock)])
        );

        $book = $service->findByIsbn('9780134494166');

        $this->assertNotNull($book);
        $this->assertSame('Clean Architecture', $book['title']);
        $this->assertSame('Robert C. Martin', $book['author']);
        $this->assertSame('9780134494166', $book['isbn']);
    }

    public function test_malformed_search_response_is_reported_as_provider_unavailability(): void
    {
        $service = new OpenLibraryService(
            new Client(['handler' => HandlerStack::create(new MockHandler([
                new Response(200, [], '{invalid-json'),
            ]))])
        );

        $this->expectException(BookProviderException::class);

        $service->searchBooks('malformed query');
    }
}