<?php

use App\Livewire\ShareDownload;
use App\Models\Share;
use App\Models\ShareFile;
use App\Services\FileEncryptionService;
use App\Services\ShareService;
use Illuminate\Http\UploadedFile;
use Illuminate\Support\Facades\Storage;
use Livewire\Livewire;

test('share download page renders for valid share', function () {
    Storage::fake('shares');

    $share = createShareWithFile();

    $response = $this->get(route('share.download', $share));

    $response->assertOk();
});

test('share download page returns 404 for expired share', function () {
    $share = Share::factory()->expired()->create();

    $response = $this->get(route('share.download', $share));

    $response->assertNotFound();
});

test('share download page returns 404 when download limit reached', function () {
    $share = Share::factory()->withMaxDownloads(1)->create(['download_count' => 1]);

    $response = $this->get(route('share.download', $share));

    $response->assertNotFound();
});

test('share download page shows password form for password-protected share', function () {
    Storage::fake('shares');

    $share = createShareWithFile('secret-pass');

    $response = $this->get(route('share.download', $share));

    $response->assertOk();
    $response->assertSee('password');
});

test('password verification works for protected share', function () {
    Storage::fake('shares');

    $share = createShareWithFile('my-password');

    Livewire::test(ShareDownload::class, ['share' => $share])
        ->assertSet('authenticated', false)
        ->set('password', 'my-password')
        ->call('verifyPassword')
        ->assertSet('authenticated', true)
        ->assertHasNoErrors();
});

test('wrong password is rejected', function () {
    Storage::fake('shares');

    $share = createShareWithFile('my-password');

    Livewire::test(ShareDownload::class, ['share' => $share])
        ->set('password', 'wrong-password')
        ->call('verifyPassword')
        ->assertSet('authenticated', false)
        ->assertHasErrors(['password']);
});

test('non-password share shows files directly', function () {
    Storage::fake('shares');

    $share = createShareWithFile();

    Livewire::test(ShareDownload::class, ['share' => $share])
        ->assertSet('authenticated', true);
});

test('download counter increments on zip download', function () {
    Storage::fake('shares');
    $share = createShareWithFile();

    $response = $this->get(route('share.download.all', $share));
    $response->streamedContent();

    $response->assertDownload('share-'.$share->token.'.zip');
    expect($share->fresh()->download_count)->toBe(1);
});

test('zip download streams a valid archive with every file\'s original content', function () {
    Storage::fake('shares');
    config(['uploads.chunk_size' => 1000]);
    $binary = random_bytes(2500);
    $share = app(ShareService::class)->createShare([
        ['file' => UploadedFile::fake()->createWithContent('notes.txt', 'hello zip content'), 'relativePath' => null],
        ['file' => UploadedFile::fake()->createWithContent('photo.bin', $binary), 'relativePath' => 'holiday/photo.bin'],
    ]);
    $zipPath = tempnam(sys_get_temp_dir(), 'zip');

    file_put_contents($zipPath, $this->get(route('share.download.all', $share))->streamedContent());

    $zip = new ZipArchive;
    expect($zip->open($zipPath))->toBeTrue();
    expect($zip->numFiles)->toBe(2);
    expect($zip->getFromName('notes.txt'))->toBe('hello zip content');
    expect($zip->getFromName('holiday/photo.bin'))->toBe($binary);
    $zip->close();
    unlink($zipPath);
});

test('the last download streams and the share stays for the cleanup, with the time of that download', function () {
    Storage::fake('shares');
    $this->freezeSecond();
    $share = createShareWithFile();
    $share->update(['max_downloads' => 1]);

    $content = $this->get(route('share.download.all', $share))->streamedContent();

    expect($content)->toStartWith("PK\x03\x04");
    expect($share->fresh()->last_downloaded_at)->toEqual(now());
});

test('a recipient downloads every file and the zip of a share limited to one download, which counts once', function () {
    Storage::fake('shares');
    $share = createShareWithFiles(maxDownloads: 1);
    [$first, $second, $third] = $share->files->all();

    $files = [
        $this->get(route('share.download.file', [$share, $first]))->streamedContent(),
        $this->get(route('share.download.file', [$share, $second]))->streamedContent(),
        $this->get(route('share.download.file', [$share, $third]))->streamedContent(),
    ];
    $zip = $this->get(route('share.download.all', $share))->streamedContent();

    expect($files)->toBe(['first file', 'second file', 'third file']);
    expect($zip)->toStartWith("PK\x03\x04");
    expect($share->fresh()->download_count)->toBe(1);
});

test('another recipient cannot open a share whose last download was taken', function (string $route) {
    Storage::fake('shares');
    $share = createShareWithFiles(maxDownloads: 1);
    $this->get(route('share.download.file', [$share, $share->files->first()]));
    $this->flushSession();

    $response = $this->get(route($route, ['share' => $share, 'shareFile' => $share->files->last()]));

    $response->assertNotFound();
})->with([
    'download page' => 'share.download',
    'download all' => 'share.download.all',
    'download one file' => 'share.download.file',
]);

test('the recipient who took the last download can no longer open the share an hour later', function (string $route) {
    Storage::fake('shares');
    $share = createShareWithFiles(maxDownloads: 1);
    $this->get(route('share.download.file', [$share, $share->files->first()]));
    $this->travel(61)->minutes();

    $response = $this->get(route($route, ['share' => $share, 'shareFile' => $share->files->last()]));

    $response->assertNotFound();
})->with([
    'download page' => 'share.download',
    'download all' => 'share.download.all',
    'download one file' => 'share.download.file',
]);

test('a recipient whose window has ended uses another download when one is left', function () {
    Storage::fake('shares');
    $share = createShareWithFiles(maxDownloads: 2);
    $this->get(route('share.download.file', [$share, $share->files->first()]));
    $this->travel(61)->minutes();

    $response = $this->get(route('share.download.file', [$share, $share->files->last()]));

    $response->assertOk();
    expect($share->fresh()->download_count)->toBe(2);
});

test('a recipient is refused the last download once another recipient has taken it', function () {
    Storage::fake('shares');
    $share = createShareWithFiles(maxDownloads: 2);
    $share->update(['download_count' => 1]);
    $this->get(route('share.download.file', [$share, $share->files->first()]));
    $this->flushSession();

    $response = $this->get(route('share.download.file', [$share, $share->files->first()]));

    $response->assertNotFound();
    expect($share->fresh()->download_count)->toBe(2);
});

test('a download refused before it starts uses no download', function (?string $password, Closure $file, string $assertion) {
    Storage::fake('shares');
    $share = createShareWithFiles(maxDownloads: 1, password: $password);
    $otherShare = createShareWithFiles();

    $response = $this->get(route('share.download.file', [$share, $file($share, $otherShare)]));

    $response->{$assertion}();
    expect($share->fresh()->download_count)->toBe(0);
})->with([
    'password share without its key' => ['secret-pass', fn (Share $share) => $share->files->first(), 'assertForbidden'],
    'file of another share' => [null, fn (Share $share, Share $otherShare) => $otherShare->files->first(), 'assertNotFound'],
]);

test('a share without a limit counts each recipient once', function () {
    Storage::fake('shares');
    $share = createShareWithFiles();
    $this->get(route('share.download.file', [$share, $share->files->first()]));
    $this->get(route('share.download.file', [$share, $share->files->last()]));
    $this->flushSession();

    $this->get(route('share.download.file', [$share, $share->files->first()]));

    expect($share->fresh()->download_count)->toBe(2);
});

test('the download page tells a recipient how many downloads are left', function (int $maxDownloads, string $note) {
    Storage::fake('shares');
    $share = createShareWithFiles(maxDownloads: $maxDownloads);

    $response = $this->get(route('share.download', $share));

    $response->assertSee($note);
})->with([
    'several left' => [3, 'Downloading uses 1 of 3 remaining downloads. You then have 1 hour to download the files.'],
    'one left' => [1, 'Downloading uses the last remaining download. You then have 1 hour to download the files.'],
]);

test('the download page tells the recipient who took the last download how long they have left', function () {
    Storage::fake('shares');
    $this->freezeSecond();
    $share = createShareWithFiles(maxDownloads: 1);
    $this->get(route('share.download.file', [$share, $share->files->first()]));
    $this->travel(2)->minutes();

    $response = $this->get(route('share.download', $share));

    $response->assertSee('You can download these files for another 58 minutes.');
    $response->assertDontSee('remaining download');
});

test('the download page says nothing about downloads on a share without a limit', function () {
    Storage::fake('shares');
    $share = createShareWithFiles();

    $response = $this->get(route('share.download', $share));

    $response->assertDontSee('to download the files');
    $response->assertDontSee('You can download these files');
});

test('a share whose files are still uploading is not found anywhere a recipient or uploader could open it', function (string $route) {
    Storage::fake('shares');
    $share = Share::factory()->pending()->create();
    $file = ShareFile::factory()->for($share)->uploading()->create();

    $response = $this->get(route($route, ['share' => $share, 'shareFile' => $file]));

    $response->assertNotFound();
})->with([
    'download page' => 'share.download',
    'download all' => 'share.download.all',
    'download one file' => 'share.download.file',
    'share created page' => 'share.created',
]);

test('a password share created before key wrapping still unlocks and downloads', function () {
    Storage::fake('shares');
    $salt = str_repeat('cd', 32);
    $share = Share::factory()->withPassword('old-password')->create(['encryption_salt' => $salt]);
    $file = ShareFile::factory()->for($share)->create(['stored_path' => 'shares/'.$share->token.'/old.enc', 'file_size' => 11]);
    $source = tempnam(sys_get_temp_dir(), 'old');
    file_put_contents($source, 'old content');
    Storage::disk('shares')->makeDirectory($share->token);
    app(FileEncryptionService::class)->encryptFile($source, Storage::disk('shares')->path($share->token.'/old.enc'), bin2hex(hash_pbkdf2('sha256', 'old-password', hex2bin($salt), 100000, 32, true)), 1024);
    unlink($source);

    Livewire::test(ShareDownload::class, ['share' => $share])
        ->set('password', 'old-password')
        ->call('verifyPassword')
        ->assertSet('authenticated', true);

    expect($this->get(route('share.download.file', [$share, $file]))->streamedContent())->toBe('old content');
});

/**
 * Helper to create a share with an actual encrypted file.
 */
function createShareWithFile(?string $password = null, string $content = 'test content'): Share
{
    return app(ShareService::class)->createShare([
        ['file' => UploadedFile::fake()->createWithContent('testfile.txt', $content), 'relativePath' => null],
    ], [
        'password' => $password,
    ]);
}

/**
 * Helper to create a share with three encrypted files: "first file", "second file" and "third file".
 */
function createShareWithFiles(?int $maxDownloads = null, ?string $password = null): Share
{
    return app(ShareService::class)->createShare([
        ['file' => UploadedFile::fake()->createWithContent('first.txt', 'first file'), 'relativePath' => null],
        ['file' => UploadedFile::fake()->createWithContent('second.txt', 'second file'), 'relativePath' => null],
        ['file' => UploadedFile::fake()->createWithContent('third.txt', 'third file'), 'relativePath' => null],
    ], [
        'password' => $password,
        'max_downloads' => $maxDownloads,
    ]);
}