<?php

use App\Livewire\FileUploader;
use App\Livewire\SystemPasswordPrompt;
use App\Models\Setting;
use App\Models\Share;
use App\Models\ShareFile;
use App\Services\ShareService;
use Illuminate\Support\Facades\Crypt;
use Illuminate\Support\Facades\Storage;
use Livewire\Features\SupportTesting\Testable;
use Livewire\Livewire;

/**
 * Upload files through the page as the browser does: register them in one batch, then store each
 * one's encrypted content (the chunk endpoint itself is covered by UploadChunkTest).
 *
 * @param  array<string, string>  $files  name => content
 * @return array<int, array<string, mixed>|null> what the page handed the browser
 */
function uploadThroughPage(Testable $component, array $files): array
{
    $targets = [];

    $component->call('registerFiles', collect($files)->map(fn (string $content, string $name): array => ['name' => $name, 'size' => strlen($content), 'path' => null])->values()->all())
        ->assertReturned(function (array $returned) use (&$targets): bool {
            $targets = $returned;

            return true;
        });

    foreach (array_values($files) as $position => $content) {
        if ($targets[$position] !== null) {
            $file = ShareFile::query()->findOrFail($targets[$position]['id']);
            app(ShareService::class)->storeChunk($file, 0, encryptedChunk($file, $content, 0, true));
        }
    }

    return $targets;
}

test('upload page can be rendered', function () {
    $response = $this->get(route('upload'));

    $response->assertOk();
});

test('upload page requires system password when configured', function () {
    Setting::set('system_password', bcrypt('system-secret'));

    $response = $this->get(route('upload'));

    $response->assertRedirect(route('system-password'));
});

test('upload page accessible after system password verified', function () {
    Setting::set('system_password', bcrypt('system-secret'));

    $response = $this->withSession(['system_password_verified' => true])
        ->get(route('upload'));

    $response->assertOk();
});

test('file upload creates share', function () {
    Storage::fake('shares');
    $component = Livewire::test(FileUploader::class);
    uploadThroughPage($component, ['document.pdf' => 'the document']);

    $component->call('createShare')
        ->assertRedirectContains('/share/');

    $share = Share::query()->sole();
    expect($share->isCompleted())->toBeTrue();
    expect($share->files->pluck('original_name')->all())->toBe(['document.pdf']);
    expect(session('pending_shares'))->not->toContain($share->token);
});

test('registering files hands the browser each file\'s chunk URL, the share key and the file\'s nonce prefix', function () {
    Storage::fake('shares');
    config(['uploads.chunk_size' => 4]);
    $component = Livewire::test(FileUploader::class);

    $targets = uploadThroughPage($component, ['a.txt' => 'abc']);

    $file = ShareFile::query()->sole();
    expect($targets[0])->toMatchArray([
        'id' => $file->id,
        'url' => url('upload/files/'.$file->id.'/chunks'),
        'key' => $file->share->encryption_key,
        'chunkSize' => 4,
        'chunkCount' => 1,
    ]);
    expect($targets[0]['noncePrefix'])->toBe(bin2hex(substr(file_get_contents(app(ShareService::class)->storedFilePath($file)), 12, 7)));
    expect(session('pending_shares'))->toBe([$file->share->token]);
    $component->assertSet('pendingToken', $file->share->token)
        ->assertSeeHtml('data-test="selected-file"');
});

test('each upload page gets its own pending share', function () {
    Storage::fake('shares');
    $first = Livewire::test(FileUploader::class);
    $second = Livewire::test(FileUploader::class);

    uploadThroughPage($first, ['one.txt' => 'one']);
    uploadThroughPage($second, ['two.txt' => 'two']);

    expect($first->get('pendingToken'))->not->toBe($second->get('pendingToken'));
    expect(Share::query()->pluck('total_size')->all())->toBe([3, 3]);
});

test('a file an admin limit refuses gets no target and shows why, while the rest of the batch is registered', function () {
    Storage::fake('shares');
    Setting::set('max_file_size', 1024 * 1024);
    $component = Livewire::test(FileUploader::class);

    $component->call('registerFiles', [
        ['name' => 'small.txt', 'size' => 3, 'path' => null],
        ['name' => 'large.txt', 'size' => 2 * 1024 * 1024, 'path' => null],
    ]);

    $component->assertReturned(fn (array $targets): bool => $targets[0] !== null && $targets[1] === null);
    expect($component->errors()->first('files'))->toBe('"large.txt" is too large (2 MB). Maximum file size is 1 MB.');
    expect(ShareFile::query()->pluck('original_name')->all())->toBe(['small.txt']);
});

test('removing files takes them out of the pending share', function () {
    Storage::fake('shares');
    $component = Livewire::test(FileUploader::class);
    $targets = uploadThroughPage($component, ['keep.txt' => 'keep', 'remove.txt' => 'remove']);

    $component->call('removeFiles', [$targets[1]['id']]);

    expect(ShareFile::query()->pluck('original_name')->all())->toBe(['keep.txt']);
    expect(Share::query()->sole()->total_size)->toBe(4);
});

test('a share cannot be created while a file is still uploading', function () {
    Storage::fake('shares');
    $component = Livewire::test(FileUploader::class)
        ->call('registerFiles', [['name' => 'unfinished.txt', 'size' => 10, 'path' => null]]);

    $component->call('createShare');

    expect($component->errors()->first('files'))->toBe('Wait until every file has finished uploading, or remove the ones that failed.');
    expect(Share::query()->sole()->isCompleted())->toBeFalse();
});

test('the page offers a warning for browsers without a secure context', function () {
    Livewire::test(FileUploader::class)
        ->assertSeeHtml('data-test="insecure-context"')
        ->assertSee('Uploads need a secure connection (HTTPS).');
});

test('file upload with password creates password-protected share', function () {
    Storage::fake('shares');
    $component = Livewire::test(FileUploader::class);
    uploadThroughPage($component, ['secret.txt' => 'secret']);

    $component
        ->set('usePassword', true)
        ->set('password', 'my-password')
        ->call('createShare')
        ->assertRedirectContains('/share/');

    $share = Share::query()->first();
    expect($share->isPasswordProtected())->toBeTrue();
});

test('switching password protection on leaves the field empty and offers a Generate button by default', function () {
    $component = Livewire::test(FileUploader::class)
        ->set('usePassword', true);

    $component->assertSet('password', '')
        ->assertSeeHtml('data-test="generate-password"')
        ->assertSeeHtml('data-test="copy-password"');
});

test('a generated password protects the share and is flashed, encrypted, for the page the upload leads to', function () {
    Storage::fake('shares');

    $component = Livewire::test(FileUploader::class);
    uploadThroughPage($component, ['secret.txt' => 'secret']);
    $component->set('usePassword', true)
        ->call('generatePassword');
    $password = $component->get('password');
    $component->call('createShare');

    $share = Share::query()->first();
    expect($password)->toMatch('/^[A-Za-z0-9]{20}$/');
    expect(app(ShareService::class)->verifyPassword($share, $password))->toBeTrue();
    expect(session('share_password.token'))->toBe($share->token);
    expect(Crypt::decryptString(session('share_password.password')))->toBe($password);
});

test('a share without a password flashes no password', function () {
    Storage::fake('shares');

    $component = Livewire::test(FileUploader::class);
    uploadThroughPage($component, ['document.pdf' => 'the document']);

    $component->call('createShare')
        ->assertRedirectContains('/share/');

    expect(session()->has('share_password'))->toBeFalse();
});

test('a prefilling generator fills in a password as protection is switched on', function () {
    Setting::set('password_generator_mode', 'prefill');

    $component = Livewire::test(FileUploader::class)
        ->set('usePassword', true);

    expect($component->get('password'))->toMatch('/^[A-Za-z0-9]{20}$/');
});

test('a prefilling generator keeps a password the uploader already typed', function () {
    Setting::set('password_generator_mode', 'prefill');

    Livewire::test(FileUploader::class)
        ->set('password', 'my-own-password')
        ->set('usePassword', true)
        ->assertSet('password', 'my-own-password');
});

test('a generator switched off offers no Generate button and generates nothing', function () {
    Setting::set('password_generator_mode', 'off');

    Livewire::test(FileUploader::class)
        ->set('usePassword', true)
        ->assertDontSeeHtml('data-test="generate-password"')
        ->assertSeeHtml('data-test="copy-password"')
        ->call('generatePassword')
        ->assertSet('password', '');
});

test('file upload with expiration sets expires_at', function () {
    Storage::fake('shares');

    $component = Livewire::test(FileUploader::class);
    uploadThroughPage($component, ['file.txt' => 'content']);

    $component
        ->set('expiration', '24h')
        ->call('createShare')
        ->assertRedirectContains('/share/');

    $share = Share::query()->first();
    expect($share->expires_at)->not->toBeNull();
});

test('file upload with max downloads sets limit', function () {
    Storage::fake('shares');

    $component = Livewire::test(FileUploader::class);
    uploadThroughPage($component, ['file.txt' => 'content']);

    $component
        ->set('maxDownloads', 5)
        ->call('createShare')
        ->assertRedirectContains('/share/');

    $share = Share::query()->first();
    expect($share->max_downloads)->toBe(5);
});

test('a file of 6 GB is accepted when the admin limits allow it', function () {
    Storage::fake('shares');
    Setting::set('max_file_size', 15000 * 1024 * 1024);
    Setting::set('max_size_per_share', 20 * 1024 * 1024 * 1024);
    Setting::set('max_storage_quota', 50 * 1024 * 1024 * 1024);

    $component = Livewire::test(FileUploader::class)
        ->call('registerFiles', [['name' => 'backup.dump', 'size' => 6 * 1024 * 1024 * 1024, 'path' => null]]);

    $component->assertHasNoErrors('files');
    expect(Share::query()->sole()->total_size)->toBe(6 * 1024 * 1024 * 1024);
    expect(ShareFile::query()->sole()->file_size)->toBe(6 * 1024 * 1024 * 1024);
});

test('file upload requires at least one file', function () {
    $component = Livewire::test(FileUploader::class)
        ->call('createShare');

    expect($component->errors()->first('files'))->toBe('Please select at least one file to upload.');
    expect(Share::query()->count())->toBe(0);
});

test('file upload blocks when storage is full', function () {
    Storage::fake('shares');
    Setting::set('max_storage_quota', 100);
    Share::factory()->create(['total_size' => 100]);

    $component = Livewire::test(FileUploader::class)
        ->call('registerFiles', [['name' => 'file.txt', 'size' => 1, 'path' => null]]);

    expect($component->errors()->first('files'))->toBe('Storage is full. Please contact the administrator.');
    expect(ShareFile::query()->count())->toBe(0);
});

test('system password prompt verifies correct password', function () {
    Setting::set('system_password', bcrypt('system-secret'));

    Livewire::test(SystemPasswordPrompt::class)
        ->set('password', 'system-secret')
        ->call('verify')
        ->assertRedirect(route('upload'));
});

test('system password prompt rejects incorrect password', function () {
    Setting::set('system_password', bcrypt('system-secret'));

    Livewire::test(SystemPasswordPrompt::class)
        ->set('password', 'wrong')
        ->call('verify')
        ->assertHasErrors(['password']);
});