"""
Tests for Subprocess Sandbox Interface Placeholder

Tests the placeholder implementation to ensure the architecture is ready
for future subprocess isolation while currently delegating to in-process implementation.
"""

from unittest.mock import Mock, patch

import pytest

from dana.integrations.python.to_dana.core.subprocess_sandbox import (
    SUBPROCESS_ISOLATION_CONFIG,
    DanaSubprocessWorker,
    SubprocessSandboxInterface,
)

# Table-driven test parameters for initialization
initialization_params = [
    {
        "name": "default_initialization",
        "init_kwargs": {"debug": True},
        "expected_debug": True,
        "expected_timeout": 30.0,
        "expected_restart_on_failure": True,
    },
    {
        "name": "custom_initialization",
        "init_kwargs": {"debug": False, "timeout": 60.0, "restart_on_failure": False},
        "expected_debug": False,
        "expected_timeout": 60.0,
        "expected_restart_on_failure": False,
    },
    {
        "name": "advanced_configuration",
        "init_kwargs": {"debug": True, "timeout": 45.0, "restart_on_failure": False},
        "expected_debug": True,
        "expected_timeout": 45.0,
        "expected_restart_on_failure": False,
    },
]

# Table-driven test parameters for configuration validation
config_validation_params = [
    {
        "name": "enabled_key",
        "config_key": "enabled",
        "expected_type": bool,
        "expected_value": False,
    },
    {
        "name": "default_timeout_key",
        "config_key": "default_timeout",
        "expected_type": (int, float),
        "should_be_positive": True,
    },
    {
        "name": "restart_on_failure_key",
        "config_key": "restart_on_failure",
        "expected_type": bool,
    },
    {
        "name": "max_restart_attempts_key",
        "config_key": "max_restart_attempts",
        "expected_type": int,
        "should_be_positive": True,
    },
    {
        "name": "subprocess_startup_timeout_key",
        "config_key": "subprocess_startup_timeout",
        "expected_type": (int, float),
        "should_be_positive": True,
    },
    {
        "name": "communication_protocol_key",
        "config_key": "communication_protocol",
        "expected_type": str,
        "expected_value": "json-rpc",
    },
    {
        "name": "max_memory_mb_key",
        "config_key": "max_memory_mb",
        "expected_type": int,
        "should_be_positive": True,
    },
]

# Table-driven test parameters for interface properties
interface_property_params = [
    {
        "name": "is_subprocess_isolated_property",
        "property_name": "is_subprocess_isolated",
        "expected_value": False,
    },
    {
        "name": "subprocess_pid_property",
        "property_name": "subprocess_pid",
        "expected_value": None,
    },
]

# Table-driven test parameters for interface methods
interface_method_params = [
    {
        "name": "reason_method",
        "method_name": "reason",
        "should_be_callable": True,
    },
    {
        "name": "close_method",
        "method_name": "close",
        "should_be_callable": True,
    },
    {
        "name": "restart_subprocess_method",
        "method_name": "restart_subprocess",
        "should_be_callable": True,
    },
]

# Table-driven test parameters for Dana module integration
dana_integration_params = [
    {
        "name": "subprocess_isolation_enabled",
        "init_kwargs": {"use_subprocess_isolation": True, "debug": True},
        "expected_subprocess_isolated": False,  # Fallback to in-process
        "expected_use_subprocess_isolation": True,  # Internal flag
    },
    {
        "name": "subprocess_isolation_with_flag",
        "init_kwargs": {"use_subprocess_isolation": True},
        "expected_subprocess_isolated": False,
        "expected_use_subprocess_isolation": True,
    },
]


class TestSubprocessSandboxInterface:
    """Test the SubprocessSandboxInterface placeholder."""

    @pytest.mark.parametrize("test_case", initialization_params, ids=lambda x: x["name"])
    def test_initialization(self, test_case):
        """Test that SubprocessSandboxInterface initializes correctly."""
        sandbox = SubprocessSandboxInterface(**test_case["init_kwargs"])

        assert sandbox._debug is test_case["expected_debug"]
        assert sandbox._timeout == test_case["expected_timeout"]
        assert sandbox._restart_on_failure is test_case["expected_restart_on_failure"]
        assert sandbox._delegate is not None

    @patch("dana.integrations.python.to_dana.core.subprocess_sandbox.InProcessSandboxInterface")
    def test_reason_delegates_to_inprocess_sandbox(self, mock_inprocess_sandbox):
        """Test that reason() calls delegate to InProcessSandboxInterface."""
        # Setup mock
        mock_instance = Mock()
        mock_inprocess_sandbox.return_value = mock_instance
        mock_instance.reason.return_value = "test response"

        # Test
        sandbox = SubprocessSandboxInterface(debug=True)
        result = sandbox.reason("test prompt", {"temperature": 0.5})

        # Verify
        assert result == "test response"
        mock_instance.reason.assert_called_once_with("test prompt", {"temperature": 0.5})

    def test_reason_basic_functionality(self):
        """Test that reason() works with actual delegate."""
        sandbox = SubprocessSandboxInterface(debug=True)

        # This should work since it delegates to InProcessSandboxInterface
        # We can't test the actual LLM call without mocking deeper
        # So we test the interface structure
        assert hasattr(sandbox, "reason")
        assert callable(sandbox.reason)

    @pytest.mark.parametrize("test_case", interface_property_params, ids=lambda x: x["name"])
    def test_interface_properties(self, test_case):
        """Test interface properties return expected values."""
        sandbox = SubprocessSandboxInterface()
        property_value = getattr(sandbox, test_case["property_name"])
        assert property_value == test_case["expected_value"]

    def test_restart_subprocess_recreates_delegate(self):
        """Test that restart_subprocess recreates the delegate."""
        sandbox = SubprocessSandboxInterface(debug=True)
        original_delegate = sandbox._delegate

        sandbox.restart_subprocess()

        # Should have created a new delegate instance
        assert sandbox._delegate is not original_delegate
        assert sandbox._delegate is not None

    def test_close_does_not_error(self):
        """Test that close() method works without errors."""
        sandbox = SubprocessSandboxInterface()
        sandbox.close()  # Should not raise any exceptions


class TestSubprocessIsolationConfig:
    """Test the subprocess isolation configuration."""

    @pytest.mark.parametrize("test_case", config_validation_params, ids=lambda x: x["name"])
    def test_config_structure_and_types(self, test_case):
        """Test that config contains required keys with correct types."""
        assert test_case["config_key"] in SUBPROCESS_ISOLATION_CONFIG

        config_value = SUBPROCESS_ISOLATION_CONFIG[test_case["config_key"]]

        # Check type
        if isinstance(test_case["expected_type"], tuple):
            assert isinstance(config_value, test_case["expected_type"])
        else:
            assert isinstance(config_value, test_case["expected_type"])

        # Check positive values if required
        if test_case.get("should_be_positive", False):
            assert config_value > 0

        # Check specific expected values
        if "expected_value" in test_case:
            assert config_value == test_case["expected_value"]


class TestDanaSubprocessWorker:
    """Test the DanaSubprocessWorker placeholder."""

    def test_worker_initialization(self):
        """Test worker can be initialized."""
        worker = DanaSubprocessWorker(debug=True)
        assert worker.debug is True

    def test_worker_run_method_exists(self):
        """Test worker has run method."""
        worker = DanaSubprocessWorker()
        assert hasattr(worker, "run")
        assert callable(worker.run)


class TestArchitecturalReadiness:
    """Test that the architecture is ready for subprocess isolation."""

    @pytest.mark.parametrize("test_case", interface_method_params, ids=lambda x: x["name"])
    def test_interface_compatibility(self, test_case):
        """Test that SubprocessSandboxInterface follows the expected interface."""
        sandbox = SubprocessSandboxInterface()

        # Should have the expected method
        assert hasattr(sandbox, test_case["method_name"])
        method = getattr(sandbox, test_case["method_name"])

        if test_case["should_be_callable"]:
            assert callable(method)

    def test_configuration_flexibility(self):
        """Test that the interface supports various configurations."""
        # Should accept all configuration parameters that will be needed
        sandbox = SubprocessSandboxInterface(debug=True, timeout=120.0, restart_on_failure=True)

        assert sandbox._debug is True
        assert sandbox._timeout == 120.0
        assert sandbox._restart_on_failure is True

    def test_error_handling_ready(self):
        """Test that error handling is ready for subprocess scenarios."""
        sandbox = SubprocessSandboxInterface()

        # Should handle errors gracefully even in placeholder mode
        try:
            sandbox.close()
            sandbox.restart_subprocess()
        except Exception as e:
            pytest.fail(f"Error handling not ready for subprocess isolation: {e}")


@pytest.mark.integration
class TestIntegrationWithDanaModule:
    """Test integration with the main Dana module."""

    @pytest.mark.parametrize("test_case", dana_integration_params, ids=lambda x: x["name"])
    def test_dana_module_can_use_subprocess_sandbox(self, test_case):
        """Test that Dana module can be configured to use subprocess sandbox."""
        from dana.integrations.python.to_dana.dana_module import Dana

        # Should be able to request subprocess isolation
        dana = Dana(**test_case["init_kwargs"])

        # Should fall back to in-process for now
        assert dana.is_subprocess_isolated is test_case["expected_subprocess_isolated"]

        # But should have the interface ready
        assert hasattr(dana, "restart_subprocess")
        assert hasattr(dana, "close")

        # Check internal flag
        assert dana._use_subprocess_isolation is test_case["expected_use_subprocess_isolation"]

    def test_configuration_system_integration(self):
        """Test that configuration system integrates properly."""
        # Configuration should be accessible
        config = SUBPROCESS_ISOLATION_CONFIG
        assert isinstance(config, dict)
        assert "enabled" in config

        # Should affect Dana module behavior
        from dana.integrations.python.to_dana.dana_module import Dana

        dana = Dana(use_subprocess_isolation=True, debug=True)

        # Should use configuration for fallback behavior
        assert dana._use_subprocess_isolation is True
