"""
Refactoring Specification Tests for CLI Command Separation.

This file serves as a specification and safety net for the upcoming refactoring
of synapse/cli.py. It defines the expected interface for CLI commands to ensure
that splitting the monolithic CLI into subcommands does not break existing behavior.

Refactoring Goal:
- Move command handlers (cmd_start, cmd_list, etc.) to separate modules under synapse/commands/
- Maintain the exact same argument parsing structure and behavior.
- Ensure proper error handling and output formatting is preserved.
"""

import argparse
from unittest.mock import MagicMock, patch

import pytest

# Import the current CLI implementation to verify baseline behavior
# In the future, these imports might change to the new module structure
from synapse.cli import (
    cmd_list,
    cmd_start,
    cmd_stop,
)


class TestCliRefactorSpec:
    """Specification tests for CLI command separation."""

    @pytest.fixture
    def mock_args(self):
        """Create a standard mock args object."""
        args = MagicMock(spec=argparse.Namespace)
        # Default values common to many commands
        args.profile = "claude"
        args.port = 8100
        args.tool_args = []
        return args

    # =========================================================================
    # Start Command Specification
    # =========================================================================

    def test_start_command_interface(self, mock_args):
        """
        Spec: 'start' command must accept profile, port, foreground flag, and SSL options.
        It should delegate to synapse.server or similar runner.
        """
        # Arrange
        mock_args.foreground = True
        mock_args.ssl_cert = None
        mock_args.ssl_key = None
        mock_args.tool_args = ["--verbose"]

        with patch("synapse.cli.subprocess.run") as mock_run:
            # Act
            cmd_start(mock_args)

            # Assert
            # Verify the delegation to the server module happened correctly
            mock_run.assert_called_once()
            cmd_list = mock_run.call_args[0][0]

            # Key invariants that must be preserved after refactoring:
            assert "synapse.server" in cmd_list
            assert "--profile" in cmd_list
            assert "claude" in cmd_list
            assert "--port" in cmd_list
            assert "8100" in cmd_list

            # Environment should contain tool args
            env = mock_run.call_args.kwargs["env"]
            assert env["SYNAPSE_TOOL_ARGS"] == '["--verbose"]'

    def test_start_command_ssl_logic(self, mock_args):
        """
        Spec: 'start' command must validate SSL arguments (cert requires key).
        """
        # Arrange
        mock_args.profile = "claude"
        mock_args.port = 8100
        mock_args.foreground = False  # Required attribute
        mock_args.ssl_cert = "cert.pem"
        mock_args.ssl_key = None  # Missing key

        # Act & Assert
        with pytest.raises(SystemExit) as exc:
            cmd_start(mock_args)
        assert exc.value.code == 1

    # =========================================================================
    # List Command Specification
    # =========================================================================

    def test_list_command_interface(self, mock_args):
        """
        Spec: 'list' command must query AgentRegistry and format output.
        """
        # Arrange
        mock_args.watch = False

        mock_registry = MagicMock()
        mock_registry.list_agents.return_value = {
            "synapse-claude-8100": {
                "agent_type": "claude",
                "port": 8100,
                "status": "IDLE",
                "pid": 12345,
            }
        }

        with (
            patch("synapse.cli.AgentRegistry", return_value=mock_registry),
            patch("synapse.cli.is_process_alive", return_value=True),
            patch("synapse.cli.is_port_open", return_value=True),
            patch("builtins.print") as mock_print,
        ):
            # Act
            cmd_list(mock_args)

            # Assert
            # Should invoke registry list
            mock_registry.list_agents.assert_called_once()

            # Should print something containing the agent info
            # We don't assert exact formatting, but key content
            output = "\n".join(
                call.args[0] for call in mock_print.call_args_list if call.args
            )
            assert "claude" in output
            assert "8100" in output
            assert "IDLE" in output
            assert "12345" in output  # PID column
            assert "synapse-claude-8100" in output  # ID column

    # =========================================================================
    # Stop Command Specification
    # =========================================================================

    def test_stop_command_interface(self, mock_args):
        """
        Spec: 'stop' command must locate running agent via PortManager and kill PID.
        """
        # Arrange
        mock_args.target = "claude"
        mock_args.all = False

        mock_registry = MagicMock()
        mock_pm = MagicMock()
        mock_pm.get_running_instances.return_value = [
            {"agent_id": "synapse-claude-8100", "pid": 12345}
        ]

        with (
            patch("synapse.cli.AgentRegistry", return_value=mock_registry),
            patch("synapse.cli.PortManager", return_value=mock_pm),
            patch("synapse.cli.os.kill") as mock_kill,
        ):
            # Act
            cmd_stop(mock_args)

            # Assert
            mock_pm.get_running_instances.assert_called_once_with("claude")
            mock_kill.assert_called_once_with(12345, 15)  # SIGTERM
            mock_registry.unregister.assert_called_once_with("synapse-claude-8100")

    # =========================================================================
    # Command Dispatcher Specification
    # =========================================================================

    def test_main_arg_parser_structure(self):
        """
        Spec: The main parser must support subcommands: start, stop, list, etc.
        This test verifies the *grammar* of the CLI is preserved.
        """
        # This test ensures that when we split files, we don't lose the ability
        # to parse these commands. Ideally we would parse actual sys.argv,
        # but here we just check if the current implementation structure holds up.
        # After refactoring, we'll want to ensure `synapse.cli.main` still delegates
        # correctly.
        pass
