fix: Avoid re-login when set mode to interactive

.changes/unreleased/fixed-20251203-155412.yaml

@@ -0,0 +1,3 @@
+kind: fixed
+body: Avoid re‑authentication when switching from command‑line to interactive mode.
+time: 2025-12-03T15:54:12.961104889Z

src/fabric_cli/commands/config/fab_config_set.py

@@ -76,13 +76,64 @@ def _set_config(args: Namespace, key: str, value: Any, verbose: bool = True) ->
 
         Context().cleanup_context_files(cleanup_all_stale=True, cleanup_current=True)
 
-    if (
-        key == fab_constant.FAB_MODE
-        and current_mode == fab_constant.FAB_MODE_COMMANDLINE
-        and previous_mode == fab_constant.FAB_MODE_INTERACTIVE
-    ):
-        utils_ui.print("Exiting interactive mode. Goodbye!")
-        os._exit(0)
+    # Enhanced mode transition handling
+    if key == fab_constant.FAB_MODE:
+        if (current_mode == fab_constant.FAB_MODE_INTERACTIVE
+            and previous_mode == fab_constant.FAB_MODE_COMMANDLINE):
+            # Handle command_line → interactive transition
+            if _is_user_authenticated():
+                utils_ui.print("Switching to interactive mode...")
+                _start_interactive_mode(args)
+            else:
+                utils_ui.print("Please login first to use interactive mode")
+
+        elif (current_mode == fab_constant.FAB_MODE_COMMANDLINE
+              and previous_mode == fab_constant.FAB_MODE_INTERACTIVE):
+            # Handle interactive → command_line transition
+            utils_ui.print("Exiting interactive mode. Goodbye!")
+            os._exit(0)
+
+
+def _is_user_authenticated() -> bool:
+    """Check if user has valid authentication tokens"""
+    try:
+        from fabric_cli.core.fab_auth import FabAuth
+        auth = FabAuth()
+        # Try to get a token without interactive renewal
+        token = auth.get_access_token(
+            fab_constant.SCOPE_FABRIC_DEFAULT,
+            interactive_renew=False
+        )
+        return token is not None
+    except FabricCLIError as e:
+        # Handle specific authentication errors
+        if e.status_code in [
+            fab_constant.ERROR_UNAUTHORIZED,
+            fab_constant.ERROR_AUTHENTICATION_FAILED,
+        ]:
+            return False
+        raise e
+    except Exception:
+        return False
+
+
+def _start_interactive_mode(args: Namespace) -> None:
+    """Launch interactive mode with current parser context"""
+    try:
+        # Import parser setup from main module
+        from fabric_cli.main import _create_parser_and_subparsers
+
+        parser, subparsers = _create_parser_and_subparsers()
+
+        from fabric_cli.core.fab_interactive import InteractiveCLI
+        interactive_cli = InteractiveCLI(parser, subparsers)
+        interactive_cli.start_interactive()
+
+    except (KeyboardInterrupt, EOFError):
+        utils_ui.print("Interactive mode cancelled.")
+    except Exception as e:
+        utils_ui.print(f"Failed to start interactive mode: {str(e)}")
+        utils_ui.print("Please restart the CLI to use interactive mode.")
 
 
 def _set_capacity(args: Namespace, value: str) -> None:

src/fabric_cli/main.py

@@ -168,7 +168,8 @@ def error(self, message):
             sys.exit(2)
 
 
-def main():
+def _create_parser_and_subparsers():
+    """Create parser and subparsers for reuse in interactive mode transition"""
     parser = CustomArgumentParser(description="Fabric CLI")
 
     # -c option for command line execution
@@ -224,6 +225,12 @@ def main():
     )
     version_parser.set_defaults(func=fab_ui.print_version)
 
+    return parser, subparsers
+
+
+def main():
+    parser, subparsers = _create_parser_and_subparsers()
+
     argcomplete.autocomplete(parser, default_completer=None)
 
     args = parser.parse_args()

tests/test_commands/test_config.py

@@ -1,9 +1,11 @@
 # Copyright (c) Microsoft Corporation.
 # Licensed under the MIT License.
 
-from unittest.mock import patch
+from unittest.mock import patch, MagicMock
+import pytest
 
 import fabric_cli.core.fab_constant as constant
+from fabric_cli.core.fab_exceptions import FabricCLIError
 from fabric_cli.errors import ErrorMessages
 from tests.test_commands.commands_parser import CLIExecutor
 from tests.test_commands.data.static_test_data import StaticTestData
@@ -171,3 +173,183 @@ def test_config_clear_cache_success(
             mock_print_done.assert_called_once()
 
     # endregion
+
+    # region config MODE SWITCHING
+    def test_success_config_set_mode_interactive_authenticated_success(
+        self, mock_questionary_print, mock_fab_set_state_config, cli_executor: CLIExecutor
+    ):
+        """Test successful transition from command_line to interactive mode when authenticated"""
+        with patch("fabric_cli.commands.config.fab_config_set._is_user_authenticated", return_value=True), \
+             patch("fabric_cli.commands.config.fab_config_set._start_interactive_mode") as mock_start_interactive:
+
+            mock_fab_set_state_config(constant.FAB_MODE, constant.FAB_MODE_COMMANDLINE)
+
+            # Execute command
+            cli_executor.exec_command(f"config set mode {constant.FAB_MODE_INTERACTIVE}")
+
+            # Assert
+            mock_questionary_print.assert_called()
+            mock_start_interactive.assert_called_once()
+            assert mock_questionary_print.call_args[0][0] == 'Switching to interactive mode...'
+
+
+    def test_config_set_mode_interactive_user_not_authenticated_failure(
+        self, mock_fab_set_state_config, mock_questionary_print, cli_executor: CLIExecutor
+    ):
+        """Test transition from command_line to interactive mode when not authenticated"""
+        with patch("fabric_cli.commands.config.fab_config_set._is_user_authenticated", return_value=False), \
+             patch("fabric_cli.commands.config.fab_config_set._start_interactive_mode") as mock_start_interactive:
+
+            mock_fab_set_state_config(constant.FAB_MODE, constant.FAB_MODE_COMMANDLINE)
+
+            # Execute command
+            cli_executor.exec_command(f"config set mode {constant.FAB_MODE_INTERACTIVE}")
+
+            # Assert
+            mock_questionary_print.assert_called()
+            assert mock_questionary_print.call_args[0][0] == "Please login first to use interactive mode"
+            mock_start_interactive.assert_not_called()
+
+    def test_config_set_mode_command_line_from_interactive_success(
+        self, mock_fab_set_state_config, mock_questionary_print, cli_executor: CLIExecutor
+    ):
+        """Test transition from interactive to command_line mode"""
+        with patch("os._exit") as mock_exit:
+
+            mock_fab_set_state_config(constant.FAB_MODE, constant.FAB_MODE_INTERACTIVE)
+            # Execute command
+            cli_executor.exec_command(f"config set mode {constant.FAB_MODE_COMMANDLINE}")
+
+            # Assert
+            mock_questionary_print.assert_called()
+            assert mock_questionary_print.call_args[0][0] == "Exiting interactive mode. Goodbye!"
+            mock_exit.assert_called_once_with(0)
+
+    def test_is_user_authenticated_with_valid_token_success(self):
+        """Test _is_user_authenticated returns True when user has valid token"""
+        from fabric_cli.commands.config.fab_config_set import _is_user_authenticated
+
+        with patch("fabric_cli.core.fab_auth.FabAuth") as mock_fab_auth:
+            mock_auth_instance = MagicMock()
+            mock_auth_instance.get_access_token.return_value = "valid_token"
+            mock_fab_auth.return_value = mock_auth_instance
+
+            result = _is_user_authenticated()
+
+            assert result is True
+            mock_auth_instance.get_access_token.assert_called_once_with(
+                constant.SCOPE_FABRIC_DEFAULT, interactive_renew=False
+            )
+
+    def test_is_user_authenticated_with_no_token_failure(self):
+        """Test _is_user_authenticated returns False when user has no token"""
+        from fabric_cli.commands.config.fab_config_set import _is_user_authenticated
+
+        with patch("fabric_cli.core.fab_auth.FabAuth") as mock_fab_auth:
+            mock_auth_instance = MagicMock()
+            mock_auth_instance.get_access_token.return_value = None
+            mock_fab_auth.return_value = mock_auth_instance
+
+            result = _is_user_authenticated()
+
+            assert result is False
+
+    def test_is_user_authenticated_with_authentication_error_failure(self):
+        """Test _is_user_authenticated returns False when authentication fails"""
+        from fabric_cli.commands.config.fab_config_set import _is_user_authenticated
+
+        with patch("fabric_cli.core.fab_auth.FabAuth") as mock_fab_auth:
+            mock_auth_instance = MagicMock()
+            mock_auth_instance.get_access_token.side_effect = FabricCLIError(
+                "Authentication failed", constant.ERROR_AUTHENTICATION_FAILED
+            )
+            mock_fab_auth.return_value = mock_auth_instance
+
+            result = _is_user_authenticated()
+
+            assert result is False
+
+    def test_is_user_authenticated_with_unexpected_error_failure(self):
+        """Test _is_user_authenticated returns False on unexpected error"""
+        from fabric_cli.commands.config.fab_config_set import _is_user_authenticated
+
+        with patch("fabric_cli.core.fab_auth.FabAuth") as mock_fab_auth:
+            mock_auth_instance = MagicMock()
+            mock_auth_instance.get_access_token.side_effect = Exception("Unexpected error")
+            mock_fab_auth.return_value = mock_auth_instance
+
+            result = _is_user_authenticated()
+
+            assert result is False
+
+    def test_start_interactive_mode_success(self):
+        """Test _start_interactive_mode successfully launches interactive CLI"""
+        from fabric_cli.commands.config.fab_config_set import _start_interactive_mode
+        from argparse import Namespace
+
+        args = Namespace()
+
+        with patch("fabric_cli.main._create_parser_and_subparsers") as mock_create_parser, \
+             patch("fabric_cli.core.fab_interactive.InteractiveCLI") as mock_interactive_cli:
+
+            mock_parser = MagicMock()
+            mock_subparsers = MagicMock()
+            mock_create_parser.return_value = (mock_parser, mock_subparsers)
+
+            mock_cli_instance = MagicMock()
+            mock_interactive_cli.return_value = mock_cli_instance
+
+            _start_interactive_mode(args)
+
+            # Assert
+            mock_create_parser.assert_called_once()
+            mock_interactive_cli.assert_called_once_with(mock_parser, mock_subparsers)
+            mock_cli_instance.start_interactive.assert_called_once()
+
+    def test_start_interactive_mode_keyboard_interrupt_success(self, mock_questionary_print):
+        """Test _start_interactive_mode handles KeyboardInterrupt gracefully"""
+        from fabric_cli.commands.config.fab_config_set import _start_interactive_mode
+        from argparse import Namespace
+
+        args = Namespace()
+
+        with patch("fabric_cli.main._create_parser_and_subparsers") as mock_create_parser, \
+             patch("fabric_cli.core.fab_interactive.InteractiveCLI") as mock_interactive_cli:
+
+            mock_parser = MagicMock()
+            mock_subparsers = MagicMock()
+            mock_create_parser.return_value = (mock_parser, mock_subparsers)
+
+            mock_cli_instance = MagicMock()
+            mock_cli_instance.start_interactive.side_effect = KeyboardInterrupt()
+            mock_interactive_cli.return_value = mock_cli_instance
+
+            _start_interactive_mode(args)
+
+            # Assert
+            mock_questionary_print.call_args[0][0] == "Interactive mode cancelled."
+
+    def test_start_interactive_mode_exception_handling_failure(self, mock_questionary_print):
+        """Test _start_interactive_mode handles general exceptions"""
+        from fabric_cli.commands.config.fab_config_set import _start_interactive_mode
+        from argparse import Namespace
+
+        args = Namespace()
+
+        with patch("fabric_cli.main._create_parser_and_subparsers") as mock_create_parser, \
+             patch("fabric_cli.core.fab_interactive.InteractiveCLI") as mock_interactive_cli:
+
+            mock_parser = MagicMock()
+            mock_subparsers = MagicMock()
+            mock_create_parser.return_value = (mock_parser, mock_subparsers)
+
+            mock_cli_instance = MagicMock()
+            mock_cli_instance.start_interactive.side_effect = Exception("Test error")
+            mock_interactive_cli.return_value = mock_cli_instance
+
+            _start_interactive_mode(args)
+
+            # Assert
+            mock_questionary_print.call_args[0][0] == "Please restart the CLI to use interactive mode."
+
+    # endregion