<?php

namespace Tests\Feature\Services;

use App\Enums\MediaDiskEnum;
use App\Models\Medium;
use App\Services\FileStorageService;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Http\UploadedFile;
use Illuminate\Support\Facades\Storage;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
use Tests\TestCase;

class FileStorageServiceTest extends TestCase
{
    use RefreshDatabase;

    protected FileStorageService $service;

    protected function setUp(): void
    {
        parent::setUp();

        Storage::fake('public');
        Storage::fake('private');
        $this->service = app(FileStorageService::class);
    }

    protected function storedMedium(string $disk = 'private', string $content = 'hello'): Medium
    {
        $medium = Medium::factory()->create(['disk' => $disk, 'path' => 'files/sample.txt', 'filename' => 'sample.txt', 'mime_type' => 'text/plain']);
        Storage::disk($disk)->put($medium->path, $content);

        return $medium;
    }

    public function test_store_file_saves_public_file_and_medium_with_url(): void
    {
        $file = UploadedFile::fake()->create('My Scan.pdf', 12, 'application/pdf');

        $medium = $this->service->storeFile($file);

        $this->assertSame(MediaDiskEnum::Public, $medium->disk);
        $this->assertMatchesRegularExpression('/^\d+_[A-Za-z0-9]{6}_my-scan\.pdf$/', $medium->filename);
        $this->assertSame('files/' . $medium->filename, $medium->path);
        $this->assertSame(Storage::disk('public')->url($medium->path), $medium->url);
        $this->assertSame(12 * 1024, $medium->size);
        $this->assertSame('application/pdf', $medium->mime_type);
        Storage::disk('public')->assertExists($medium->path);
    }

    public function test_store_file_saves_private_file_without_url_in_custom_directory(): void
    {
        $medium = $this->service->storeFile(UploadedFile::fake()->image('x.png'), 'private', 'reports');

        $this->assertSame(MediaDiskEnum::Private, $medium->disk);
        $this->assertNull($medium->url);
        $this->assertStringStartsWith('reports/', $medium->path);
        Storage::disk('private')->assertExists($medium->path);
        Storage::disk('public')->assertMissing($medium->path);
    }

    public function test_store_file_generates_distinct_filenames_for_same_upload_name(): void
    {
        $first = $this->service->storeFile(UploadedFile::fake()->image('same.png'));
        $second = $this->service->storeFile(UploadedFile::fake()->image('same.png'));

        $this->assertNotSame($first->filename, $second->filename);
    }

    public function test_move_to_disk_moves_file_from_private_to_public_and_sets_url(): void
    {
        $medium = $this->storedMedium('private');

        $this->assertTrue($this->service->moveToDisk($medium, 'public'));

        $medium->refresh();
        $this->assertSame(MediaDiskEnum::Public, $medium->disk);
        $this->assertSame(Storage::disk('public')->url('files/sample.txt'), $medium->url);
        Storage::disk('public')->assertExists('files/sample.txt');
        Storage::disk('private')->assertMissing('files/sample.txt');
        $this->assertSame('hello', Storage::disk('public')->get('files/sample.txt'));
    }

    public function test_move_to_disk_moves_file_to_private_and_clears_url(): void
    {
        $medium = $this->storedMedium('public');
        $medium->update(['url' => 'http://example.test/files/sample.txt']);

        $this->assertTrue($this->service->moveToDisk($medium, 'private'));

        $medium->refresh();
        $this->assertSame(MediaDiskEnum::Private, $medium->disk);
        $this->assertNull($medium->url);
        Storage::disk('private')->assertExists('files/sample.txt');
        Storage::disk('public')->assertMissing('files/sample.txt');
    }

    public function test_move_to_disk_returns_true_without_changes_for_same_disk(): void
    {
        $medium = $this->storedMedium('private');

        $this->assertTrue($this->service->moveToDisk($medium, 'private'));
        Storage::disk('private')->assertExists('files/sample.txt');
    }

    public function test_move_to_disk_returns_false_when_source_file_is_missing(): void
    {
        $medium = Medium::factory()->private()->create(['path' => 'files/missing.txt']);

        $this->assertFalse($this->service->moveToDisk($medium, 'public'));
        $this->assertSame(MediaDiskEnum::Private, $medium->fresh()->disk);
    }

    public function test_delete_medium_removes_file_and_record(): void
    {
        $medium = $this->storedMedium('private');

        $this->service->deleteMedium($medium);

        Storage::disk('private')->assertMissing('files/sample.txt');
        $this->assertDatabaseMissing('media', ['id' => $medium->id]);
    }

    public function test_delete_medium_removes_record_even_when_file_is_missing(): void
    {
        $medium = Medium::factory()->private()->create(['path' => 'files/missing.txt']);

        $this->service->deleteMedium($medium);

        $this->assertDatabaseMissing('media', ['id' => $medium->id]);
    }

    public function test_download_file_returns_attachment_for_private_existing_file(): void
    {
        $medium = $this->storedMedium('private');

        $response = $this->service->downloadFile($medium);

        $this->assertStringContainsString('attachment', $response->headers->get('Content-Disposition'));
        $this->assertStringContainsString('sample.txt', $response->headers->get('Content-Disposition'));
    }

    public function test_download_file_aborts_for_public_medium(): void
    {
        $medium = $this->storedMedium('public');

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

        $this->service->downloadFile($medium);
    }

    public function test_download_file_aborts_when_file_is_missing(): void
    {
        $medium = Medium::factory()->private()->create(['path' => 'files/missing.txt']);

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

        $this->service->downloadFile($medium);
    }

    public function test_serve_file_returns_inline_content_with_mime_type(): void
    {
        $medium = $this->storedMedium('private', 'inline body');

        $response = $this->service->serveFile($medium);

        $this->assertSame(200, $response->getStatusCode());
        $this->assertSame('inline body', $response->getContent());
        $this->assertSame('text/plain', $response->headers->get('Content-Type'));
        $this->assertSame('inline; filename="sample.txt"', $response->headers->get('Content-Disposition'));
    }

    public function test_serve_file_aborts_for_public_medium(): void
    {
        $medium = $this->storedMedium('public');

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

        $this->service->serveFile($medium);
    }
}