import pytest
from app import create_app
from unittest.mock import patch, MagicMock
import base64

@pytest.fixture
def app():
    """Create application for testing."""
    app = create_app('development')
    app.config['TESTING'] = True
    app.config['SECRET_KEY'] = 'test-secret-key'
    app.config['SESSION_TYPE'] = 'null'
    return app

@pytest.fixture
def client(app):
    """Create test client with authenticated session."""
    with app.test_client() as client:
        # Set up authenticated session
        with client.session_transaction() as sess:
            sess['username'] = 'testuser'
            sess['password'] = base64.b64encode(b'testpass').decode()
            sess['is_admin'] = False
        yield client

def test_list_files_not_authenticated(app):
    """Test list files without authentication."""
    with app.test_client() as client:
        response = client.get('/api/files/list?path=/')
        assert response.status_code == 401

@patch('app.routes.webdav_proxy.NextcloudClient')
def test_list_files_success(mock_nc_client, client):
    """Test successful file listing."""
    mock_instance = MagicMock()
    mock_instance.propfind.return_value = {
        'items': [
            {'name': 'Documents', 'path': '/Documents', 'type': 'directory', 'size': 0},
            {'name': 'photo.jpg', 'path': '/photo.jpg', 'type': 'file', 'size': 12345}
        ],
        'path': '/',
        'count': 2
    }
    mock_nc_client.return_value = mock_instance
    
    response = client.get('/api/files/list?path=/')
    assert response.status_code == 200
    data = response.get_json()
    assert 'items' in data
    assert len(data['items']) == 2
    assert data['items'][0]['name'] == 'Documents'
    assert data['items'][1]['name'] == 'photo.jpg'

@patch('app.routes.webdav_proxy.NextcloudClient')
def test_upload_file_success(mock_nc_client, client):
    """Test successful file upload."""
    mock_instance = MagicMock()
    mock_instance.put_file.return_value = {
        'success': True,
        'url': 'http://nextcloud/remote.php/dav/files/testuser/photo.jpg'
    }
    mock_nc_client.return_value = mock_instance
    
    # Test with form data
    response = client.post(
        '/api/files/upload?path=/uploads',
        data={
            'path': '/uploads',
            'file': (BytesIO(b'fake image data'), 'photo.jpg')
        },
        content_type='multipart/form-data'
    )
    assert response.status_code == 200
    data = response.get_json()
    assert data['success'] is True
    assert 'photo.jpg' in data['path']

def test_upload_file_no_path(client):
    """Test upload without target path."""
    response = client.post('/api/files/upload')
    assert response.status_code == 400
    data = response.get_json()
    assert 'error' in data

@patch('app.routes.webdav_proxy.NextcloudClient')
def test_verify_file_exists(mock_nc_client, client):
    """Test file verification - file exists."""
    mock_instance = MagicMock()
    mock_instance.head.return_value = True
    mock_nc_client.return_value = mock_instance
    
    response = client.get('/api/files/verify?path=/photo.jpg')
    assert response.status_code == 200
    data = response.get_json()
    assert data['exists'] is True

@patch('app.routes.webdav_proxy.NextcloudClient')
def test_verify_file_not_exists(mock_nc_client, client):
    """Test file verification - file does not exist."""
    mock_instance = MagicMock()
    mock_instance.head.return_value = False
    mock_nc_client.return_value = mock_instance
    
    response = client.get('/api/files/verify?path=/nonexistent.jpg')
    assert response.status_code == 404
    data = response.get_json()
    assert data['exists'] is False

def test_verify_file_no_path(client):
    """Test verification without path."""
    response = client.get('/api/files/verify')
    assert response.status_code == 400
    data = response.get_json()
    assert 'error' in data

@patch('app.routes.webdav_proxy.NextcloudClient')
def test_mkdir_success(mock_nc_client, client):
    """Test successful directory creation."""
    mock_instance = MagicMock()
    mock_instance.mkcol.return_value = True
    mock_nc_client.return_value = mock_instance
    
    response = client.post(
        '/api/files/mkdir',
        json={'path': '/NewFolder'}
    )
    assert response.status_code == 201
    data = response.get_json()
    assert data['success'] is True
    assert data['path'] == '/NewFolder'

def test_mkdir_no_path(client):
    """Test mkdir without path."""
    response = client.post('/api/files/mkdir', json={})
    assert response.status_code == 400
    data = response.get_json()
    assert 'error' in data

@patch('app.routes.webdav_proxy.NextcloudClient')
def test_rename_file_success(mock_nc_client, client):
    """Test successful file rename."""
    mock_instance = MagicMock()
    mock_instance.move.return_value = True
    mock_nc_client.return_value = mock_instance
    
    response = client.post(
        '/api/files/rename',
        json={
            'source': '/old_name.jpg',
            'destination': '/new_name.jpg'
        }
    )
    assert response.status_code == 200
    data = response.get_json()
    assert data['success'] is True
    assert data['source'] == '/old_name.jpg'
    assert data['destination'] == '/new_name.jpg'

def test_rename_file_missing_params(client):
    """Test rename without required parameters."""
    response = client.post(
        '/api/files/rename',
        json={'source': '/old_name.jpg'}
    )
    assert response.status_code == 400
    data = response.get_json()
    assert 'error' in data

@patch('app.routes.webdav_proxy.NextcloudClient')
@patch('app.routes.webdav_proxy.Image')
def test_thumbnail_success(mock_image, mock_nc_client, client):
    """Test successful thumbnail generation."""
    # Mock Nextcloud client
    mock_instance = MagicMock()
    mock_instance.get_file.return_value = b'fake image data'
    mock_nc_client.return_value = mock_instance
    
    # Mock PIL Image
    mock_img = MagicMock()
    mock_img.mode = 'RGB'
    mock_image.open.return_value = mock_img
    
    response = client.get('/api/files/thumbnail?path=/photo.jpg&size=256')
    assert response.status_code == 200
    assert response.content_type == 'image/jpeg'

def test_thumbnail_no_path(client):
    """Test thumbnail without path."""
    response = client.get('/api/files/thumbnail')
    assert response.status_code == 400
    data = response.get_json()
    assert 'error' in data

# Import BytesIO for upload test
from io import BytesIO