<?php

declare(strict_types=1);

namespace LIT\MCP\Tests\Unit\Integrations\Media;

use Brain\Monkey\Functions;
use LIT\MCP\Integrations\Media\MediaDownloadAbility;
use LIT\MCP\Limits;
use LIT\MCP\Tests\Unit\TestCase;
use WP_Post;

final class MediaDownloadAbilityTest extends TestCase
{
    private string $file = '';

    protected function setUp(): void
    {
        parent::setUp();
        $this->file = (string) tempnam(sys_get_temp_dir(), 'lit-download');
        file_put_contents($this->file, 'PDFDATA');
        Functions\when('get_post')->justReturn(new WP_Post([
            'ID' => 40,
            'post_type' => 'attachment',
            'post_mime_type' => 'application/pdf',
        ]));
        Functions\when('current_user_can')->justReturn(true);
        Functions\when('get_attached_file')->justReturn($this->file);
        Functions\when('wp_get_attachment_url')->justReturn('https://kunde.de/wp-content/uploads/preise.pdf');
        Functions\when('wp_basename')->alias('basename');
        Functions\when('wp_check_filetype')->justReturn(['ext' => 'pdf', 'type' => 'application/pdf']);
        Functions\when('wp_upload_dir')->justReturn(['basedir' => sys_get_temp_dir()]);
    }

    protected function tearDown(): void
    {
        if (is_file($this->file)) {
            unlink($this->file);
        }
        parent::tearDown();
    }

    public function testReturnsTheFileAsEmbeddedBlobResource(): void
    {
        Functions\when('get_option')->justReturn([]);

        $result = (new MediaDownloadAbility(new Limits()))->execute(['id' => 40]);

        self::assertSame('resource', $result['type']);
        self::assertSame('https://kunde.de/wp-content/uploads/preise.pdf', $result['resource']['uri']);
        self::assertSame('application/pdf', $result['resource']['mimeType']);
        self::assertSame(base64_encode('PDFDATA'), $result['resource']['blob']);
    }

    public function testFilesAboveTheLimitAreRefused(): void
    {
        Functions\when('get_option')->justReturn(['upload_mb' => 1]);
        file_put_contents($this->file, str_repeat('x', 1024 * 1024 + 1));

        $result = (new MediaDownloadAbility(new Limits()))->execute(['id' => 40]);

        self::assertSame('lit_unsupported', $result->get_error_code());
    }

    public function testDownloadsAreCappedAtTenMegabytesEvenWithAHigherUploadLimit(): void
    {
        Functions\when('get_option')->justReturn(['upload_mb' => 32]);
        file_put_contents($this->file, str_repeat('x', 10 * 1024 * 1024 + 1));

        $result = (new MediaDownloadAbility(new Limits()))->execute(['id' => 40]);

        self::assertSame('lit_unsupported', $result->get_error_code());
        self::assertStringContainsString('Limit 10 MB', $result->get_error_message());
        self::assertStringContainsString('URL', (string) $result->get_error_data()['hint']);
    }

    public function testUnknownSizeIsNotFound(): void
    {
        Functions\when('get_option')->justReturn([]);
        Functions\when('image_get_intermediate_size')->justReturn(false);

        $result = (new MediaDownloadAbility(new Limits()))->execute(['id' => 40, 'size' => 'huge']);

        self::assertSame('lit_not_found', $result->get_error_code());
        self::assertNull((new MediaDownloadAbility(new Limits()))->outputSchema());
    }

    public function testFilesOutsideTheUploadsDirectoryAreRefused(): void
    {
        Functions\when('get_option')->justReturn([]);
        Functions\when('wp_upload_dir')->justReturn(['basedir' => sys_get_temp_dir() . '/lit-elsewhere']);

        $result = (new MediaDownloadAbility(new Limits()))->execute(['id' => 40]);

        self::assertSame('lit_not_found', $result->get_error_code());
    }
}