<?php

namespace App\Tests\Service;

use App\Message\MeilisearchMessage;
use App\Service\MeilisearchService;
use PHPUnit\Framework\TestCase;
use Symfony\Component\Cache\Adapter\ArrayAdapter;
use Symfony\Component\Messenger\Envelope;
use Symfony\Component\Messenger\MessageBusInterface;
use Symfony\Contracts\HttpClient\HttpClientInterface;
use Symfony\Contracts\HttpClient\ResponseInterface;

class MeilisearchServiceTest extends TestCase
{
    private HttpClientInterface $httpClient;
    private MessageBusInterface $bus;
    private ArrayAdapter $cache;
    private MeilisearchService $service;

    protected function setUp(): void
    {
        $this->httpClient = $this->createMock(HttpClientInterface::class);
        $this->bus = $this->createMock(MessageBusInterface::class);
        $this->cache = new ArrayAdapter();
        $this->service = new MeilisearchService(
            $this->httpClient,
            $this->bus,
            'http://meilisearch:7700',
            'test-key',
            $this->cache,
        );
    }

    public function testIndexExistsReturnsTrue(): void
    {
        $response = $this->createMock(ResponseInterface::class);
        $response->method('getStatusCode')->willReturn(200);
        $this->httpClient->method('request')->willReturn($response);

        self::assertTrue($this->service->indexExists('events'));
    }

    public function testIndexExistsReturnsFalseOnException(): void
    {
        $this->httpClient->method('request')->willThrowException(new \RuntimeException('fail'));

        self::assertFalse($this->service->indexExists('events'));
    }

    public function testCreateIndexIfNotExistsCreatesWhenMissing(): void
    {
        $this->httpClient->method('request')->willThrowException(new \RuntimeException('not found'));
        $this->bus->expects(self::once())
            ->method('dispatch')
            ->with(self::callback(fn (MeilisearchMessage $m) => 'createIndex' === $m->action))
            ->willReturn(new Envelope(new \stdClass()));

        $this->service->createIndexIfNotExists('events');
    }

    public function testCreateIndexIfNotExistsSkipsWhenExists(): void
    {
        $response = $this->createMock(ResponseInterface::class);
        $response->method('getStatusCode')->willReturn(200);
        $this->httpClient->method('request')->willReturn($response);
        $this->bus->expects(self::never())->method('dispatch');

        $this->service->createIndexIfNotExists('events');
    }

    public function testCreateIndexDispatchesMessage(): void
    {
        $this->bus->expects(self::once())
            ->method('dispatch')
            ->with(self::callback(fn (MeilisearchMessage $m) => 'createIndex' === $m->action && 'events' === $m->index))
            ->willReturn(new Envelope(new \stdClass()));

        $this->service->createIndex('events');
    }

    public function testDeleteIndexDispatchesMessage(): void
    {
        $this->bus->expects(self::once())
            ->method('dispatch')
            ->with(self::callback(fn (MeilisearchMessage $m) => 'deleteIndex' === $m->action))
            ->willReturn(new Envelope(new \stdClass()));

        $this->service->deleteIndex('events');
    }

    public function testAddDocumentsDispatchesMessage(): void
    {
        $docs = [['id' => 1, 'title' => 'Test']];
        $this->bus->expects(self::once())
            ->method('dispatch')
            ->with(self::callback(fn (MeilisearchMessage $m) => 'addDocuments' === $m->action && $m->payload['documents'] === $docs))
            ->willReturn(new Envelope(new \stdClass()));

        $this->service->addDocuments('events', $docs);
    }

    public function testUpdateDocumentsDispatchesMessage(): void
    {
        $docs = [['id' => 1, 'title' => 'Updated']];
        $this->bus->expects(self::once())
            ->method('dispatch')
            ->with(self::callback(fn (MeilisearchMessage $m) => 'updateDocuments' === $m->action && $m->payload['documents'] === $docs))
            ->willReturn(new Envelope(new \stdClass()));

        $this->service->updateDocuments('events', $docs);
    }

    public function testDeleteDocumentDispatchesMessage(): void
    {
        $this->bus->expects(self::once())
            ->method('dispatch')
            ->with(self::callback(fn (MeilisearchMessage $m) => 'deleteDocument' === $m->action && 42 === $m->payload['documentId']))
            ->willReturn(new Envelope(new \stdClass()));

        $this->service->deleteDocument('events', 42);
    }

    public function testDeleteDocumentsDispatchesMessage(): void
    {
        $ids = [1, 2, 3];
        $this->bus->expects(self::once())
            ->method('dispatch')
            ->with(self::callback(fn (MeilisearchMessage $m) => 'deleteDocuments' === $m->action && $m->payload['ids'] === $ids))
            ->willReturn(new Envelope(new \stdClass()));

        $this->service->deleteDocuments('events', $ids);
    }

    public function testUpdateSettingsDispatchesMessage(): void
    {
        $settings = ['filterableAttributes' => ['status']];
        $this->bus->expects(self::once())
            ->method('dispatch')
            ->with(self::callback(fn (MeilisearchMessage $m) => 'updateSettings' === $m->action && $m->payload['settings'] === $settings))
            ->willReturn(new Envelope(new \stdClass()));

        $this->service->updateSettings('events', $settings);
    }

    public function testSearchMakesPostRequest(): void
    {
        $response = $this->createMock(ResponseInterface::class);
        $response->method('getStatusCode')->willReturn(200);
        $response->method('toArray')->willReturn(['hits' => []]);
        $this->httpClient->method('request')->willReturn($response);

        $result = $this->service->search('events', 'test');

        self::assertArrayHasKey('hits', $result);
    }

    public function testGetDocumentReturnsArray(): void
    {
        $response = $this->createMock(ResponseInterface::class);
        $response->method('getStatusCode')->willReturn(200);
        $response->method('toArray')->willReturn(['id' => 1, 'title' => 'Event']);
        $this->httpClient->method('request')->willReturn($response);

        $result = $this->service->getDocument('events', 1);

        self::assertSame(1, $result['id']);
    }

    public function testRequestReturnsEmptyArrayOn204(): void
    {
        $response = $this->createMock(ResponseInterface::class);
        $response->method('getStatusCode')->willReturn(204);
        $this->httpClient->method('request')->willReturn($response);

        $result = $this->service->request('DELETE', '/indexes/events');

        self::assertSame([], $result);
    }

    public function testGetAllDocumentIdsSinglePage(): void
    {
        $response = $this->createMock(ResponseInterface::class);
        $response->method('getStatusCode')->willReturn(200);
        $response->method('toArray')->willReturn([
            'results' => [
                ['id' => 1],
                ['id' => 2],
                ['id' => 3],
            ],
        ]);
        $this->httpClient->method('request')->willReturn($response);

        $ids = $this->service->getAllDocumentIds('events');

        self::assertSame([1, 2, 3], $ids);
    }

    public function testGetAllDocumentIdsMultiplePages(): void
    {
        // First call returns exactly 1000 results (triggers next page)
        $firstPageDocs = array_map(fn (int $i) => ['id' => $i], range(1, 1000));
        $secondPageDocs = [['id' => 1001], ['id' => 1002]];

        $response1 = $this->createMock(ResponseInterface::class);
        $response1->method('getStatusCode')->willReturn(200);
        $response1->method('toArray')->willReturn(['results' => $firstPageDocs]);

        $response2 = $this->createMock(ResponseInterface::class);
        $response2->method('getStatusCode')->willReturn(200);
        $response2->method('toArray')->willReturn(['results' => $secondPageDocs]);

        $this->httpClient->method('request')->willReturnOnConsecutiveCalls($response1, $response2);

        $ids = $this->service->getAllDocumentIds('events');

        self::assertCount(1002, $ids);
        self::assertSame(1, $ids[0]);
        self::assertSame(1002, $ids[1001]);
    }

    public function testGetAllDocumentIdsEmptyIndex(): void
    {
        $response = $this->createMock(ResponseInterface::class);
        $response->method('getStatusCode')->willReturn(200);
        $response->method('toArray')->willReturn(['results' => []]);
        $this->httpClient->method('request')->willReturn($response);

        $ids = $this->service->getAllDocumentIds('events');

        self::assertSame([], $ids);
    }

    public function testListIndexes(): void
    {
        $response = $this->createMock(ResponseInterface::class);
        $response->method('getStatusCode')->willReturn(200);
        $response->method('toArray')->willReturn([
            'results' => [
                ['uid' => 'events'],
                ['uid' => 'users'],
            ],
        ]);
        $this->httpClient->method('request')->willReturn($response);

        $indexes = $this->service->listIndexes();

        self::assertSame(['events', 'users'], $indexes);
    }

    public function testListIndexesEmpty(): void
    {
        $response = $this->createMock(ResponseInterface::class);
        $response->method('getStatusCode')->willReturn(200);
        $response->method('toArray')->willReturn(['results' => []]);
        $this->httpClient->method('request')->willReturn($response);

        $indexes = $this->service->listIndexes();

        self::assertSame([], $indexes);
    }
}