<?php

declare(strict_types=1);

/*
 * Chill is a software for social workers
 *
 * For the full copyright and license information, please view
 * the LICENSE file that was distributed with this source code.
 */

namespace Chill\DocStoreBundle\Tests\Service;

use Chill\DocStoreBundle\AsyncUpload\SignedUrl;
use Chill\DocStoreBundle\AsyncUpload\TempUrlGeneratorInterface;
use Chill\DocStoreBundle\Entity\StoredObject;
use Chill\DocStoreBundle\Exception\StoredObjectManagerException;
use Chill\DocStoreBundle\Service\StoredObjectManager;
use Chill\DocStoreBundle\Service\StoredObjectManagerInterface;
use PHPUnit\Framework\TestCase;
use Symfony\Component\HttpClient\Exception\TransportException;
use Symfony\Component\HttpClient\MockHttpClient;
use Symfony\Component\HttpClient\Response\MockResponse;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Contracts\HttpClient\HttpClientInterface;

/**
 * @internal
 *
 * @covers \Chill\DocStoreBundle\Service\StoredObjectManager
 */
final class StoredObjectManagerTest extends TestCase
{
    public static function getDataProvider(): \Generator
    {
        /* HAPPY SCENARIO */

        // Encrypted object
        yield [
            (new StoredObject())
                ->setFilename('encrypted.txt')
                ->setKeyInfos(['k' => base64_encode('S9NIHMaFHOWzLPez3jZOIHBaNfBrMQUR5zvqBz6kme8')])
                ->setIv(unpack('C*', 'abcdefghijklmnop')),
            hex2bin('741237d255fd4f7eddaaa9058912a84caae28a41b10b34d4e3e3abe41d3b9b47cb0dd8f22c3c883d4f0e9defa75ff662'), // Binary encoded string
            'The quick brown fox jumps over the lazy dog', // clear
        ];

        // Non-encrypted object
        yield [
            (new StoredObject())->setFilename('non-encrypted.txt'), // The StoredObject
            'The quick brown fox jumps over the lazy dog', // Encrypted
            'The quick brown fox jumps over the lazy dog', // Clear
        ];

        /* UNHAPPY SCENARIO */

        // Encrypted object with issue during HTTP communication
        yield [
            (new StoredObject())
                ->setFilename('error_during_http_request.txt')
                ->setKeyInfos(['k' => base64_encode('S9NIHMaFHOWzLPez3jZOIHBaNfBrMQUR5zvqBz6kme8')])
                ->setIv(unpack('C*', 'abcdefghijklmnop')),
            hex2bin('741237d255fd4f7eddaaa9058912a84caae28a41b10b34d4e3e3abe41d3b9b47cb0dd8f22c3c883d4f0e9defa75ff662'), // Binary encoded string
            'The quick brown fox jumps over the lazy dog', // clear
            StoredObjectManagerException::class,
        ];

        // Encrypted object with issue during HTTP communication: Invalid status code
        yield [
            (new StoredObject())
                ->setFilename('invalid_statuscode.txt')
                ->setKeyInfos(['k' => base64_encode('S9NIHMaFHOWzLPez3jZOIHBaNfBrMQUR5zvqBz6kme8')])
                ->setIv(unpack('C*', 'abcdefghijklmnop')),
            hex2bin('741237d255fd4f7eddaaa9058912a84caae28a41b10b34d4e3e3abe41d3b9b47cb0dd8f22c3c883d4f0e9defa75ff662'), // Binary encoded string
            'The quick brown fox jumps over the lazy dog', // clear
            StoredObjectManagerException::class,
        ];

        // Erroneous encrypted: Unable to decrypt exception.
        yield [
            (new StoredObject())
                ->setFilename('unable_to_decrypt.txt')
                ->setKeyInfos(['k' => base64_encode('WRONG_PASS_PHRASE')])
                ->setIv(unpack('C*', 'abcdefghijklmnop')),
            'WRONG_ENCODED_VALUE', // Binary encoded string
            'The quick brown fox jumps over the lazy dog', // clear
            StoredObjectManagerException::class,
        ];
    }

    /**
     * @dataProvider getDataProvider
     */
    public function testRead(StoredObject $storedObject, string $encodedContent, string $clearContent, ?string $exceptionClass = null)
    {
        if (null !== $exceptionClass) {
            $this->expectException($exceptionClass);
        }

        $storedObjectManager = $this->getSubject($storedObject, $encodedContent);

        self::assertEquals($clearContent, $storedObjectManager->read($storedObject));
    }

    /**
     * @dataProvider getDataProvider
     */
    public function testWrite(StoredObject $storedObject, string $encodedContent, string $clearContent, ?string $exceptionClass = null)
    {
        if (null !== $exceptionClass) {
            $this->expectException($exceptionClass);
        }

        $storedObjectManager = $this->getSubject($storedObject, $encodedContent);

        $storedObjectManager->write($storedObject, $clearContent);

        self::assertEquals($clearContent, $storedObjectManager->read($storedObject));
    }

    public function testWriteWithDeleteAt()
    {
        $storedObject = new StoredObject();

        $expectedRequests = [
            function ($method, $url, $options): MockResponse {
                self::assertEquals('PUT', $method);
                self::assertArrayHasKey('headers', $options);
                self::assertIsArray($options['headers']);
                self::assertCount(0, array_filter($options['headers'], fn (string $header) => str_contains($header, 'X-Delete-At')));

                return new MockResponse('', ['http_code' => 201]);
            },

            function ($method, $url, $options): MockResponse {
                self::assertEquals('PUT', $method);
                self::assertArrayHasKey('headers', $options);
                self::assertIsArray($options['headers']);
                self::assertCount(1, array_filter($options['headers'], fn (string $header) => str_contains($header, 'X-Delete-At')));
                self::assertContains('X-Delete-At: 1711014260', $options['headers']);

                return new MockResponse('', ['http_code' => 201]);
            },
        ];
        $client = new MockHttpClient($expectedRequests);

        $manager = new StoredObjectManager($client, $this->getTempUrlGenerator($storedObject));

        $manager->write($storedObject, 'ok');

        // with a deletedAt date
        $storedObject->setDeleteAt(\DateTimeImmutable::createFromFormat('U', '1711014260'));
        $manager->write($storedObject, 'ok');
    }

    private function getHttpClient(string $encodedContent): HttpClientInterface
    {
        $callback = static function ($method, $url, $options) use ($encodedContent) {
            if (Request::METHOD_GET === $method) {
                switch ($url) {
                    case 'https://example.com/non-encrypted.txt':
                    case 'https://example.com/encrypted.txt':
                        return new MockResponse($encodedContent, ['http_code' => 200]);

                    case 'https://example.com/error_during_http_request.txt':
                        return new TransportException('error_during_http_request.txt');

                    case 'https://example.com/invalid_statuscode.txt':
                        return new MockResponse($encodedContent, ['http_code' => 404]);
                }
            }

            if (Request::METHOD_PUT === $method) {
                switch ($url) {
                    case 'https://example.com/non-encrypted.txt':
                    case 'https://example.com/encrypted.txt':
                        return new MockResponse($encodedContent, ['http_code' => 201]);

                    case 'https://example.com/error_during_http_request.txt':
                        throw new TransportException('error_during_http_request.txt');
                    case 'https://example.com/invalid_statuscode.txt':
                        return new MockResponse($encodedContent, ['http_code' => 404]);
                }
            }

            return new MockResponse('Not found');
        };

        return new MockHttpClient($callback);
    }

    private function getSubject(StoredObject $storedObject, string $encodedContent): StoredObjectManagerInterface
    {
        return new StoredObjectManager(
            $this->getHttpClient($encodedContent),
            $this->getTempUrlGenerator($storedObject)
        );
    }

    private function getTempUrlGenerator(StoredObject $storedObject): TempUrlGeneratorInterface
    {
        $response = new SignedUrl(
            'PUT',
            'https://example.com/'.$storedObject->getFilename(),
            new \DateTimeImmutable('1 hours'),
            $storedObject->getFilename()
        );

        $tempUrlGenerator = $this->createMock(TempUrlGeneratorInterface::class);

        $tempUrlGenerator
            ->method('generate')
            ->withAnyParameters()
            ->willReturn($response);

        return $tempUrlGenerator;
    }
}