"""Tests for RuntimeConnectionHandler helper functions.

Tests handler helper methods that don't require full handler setup.
"""

from __future__ import annotations

from types import SimpleNamespace
from unittest.mock import AsyncMock, MagicMock, Mock
import pytest

from langbot_plugin.entities.io.actions.enums import PluginToRuntimeAction


def make_handler(app):
    """Create a RuntimeConnectionHandler with mocked external connection."""
    from langbot.pkg.plugin.handler import RuntimeConnectionHandler

    return RuntimeConnectionHandler(Mock(), AsyncMock(return_value=True), app)


class TestHandlerQueryVariables:
    """Tests for handler query variable logic."""

    @pytest.fixture
    def mock_app(self):
        """Create mock app with query pool."""
        app = SimpleNamespace()

        app.query_pool = SimpleNamespace()
        app.query_pool.cached_queries = {}

        app.logger = SimpleNamespace()
        app.logger.debug = MagicMock()
        app.logger.warning = MagicMock()

        return app

    @pytest.mark.asyncio
    async def test_set_query_var_query_not_found(self, mock_app):
        """Test set_query_var returns error when query not found."""
        runtime_handler = make_handler(mock_app)

        response = await runtime_handler.actions[PluginToRuntimeAction.SET_QUERY_VAR.value](
            {
                'query_id': 'nonexistent-query',
                'key': 'test_var',
                'value': 'test_value',
            }
        )

        assert response.code != 0
        assert 'nonexistent-query' in response.message

    @pytest.mark.asyncio
    async def test_set_query_var_success(self, mock_app):
        """Test set_query_var sets variable on existing query."""
        runtime_handler = make_handler(mock_app)
        mock_query = SimpleNamespace()
        mock_query.variables = {}

        mock_app.query_pool.cached_queries['test-query'] = mock_query

        response = await runtime_handler.actions[PluginToRuntimeAction.SET_QUERY_VAR.value](
            {
                'query_id': 'test-query',
                'key': 'test_var',
                'value': 'test_value',
            }
        )

        assert response.code == 0
        assert mock_query.variables['test_var'] == 'test_value'

    @pytest.mark.asyncio
    @pytest.mark.parametrize(
        'key',
        [
            '_host_box_scope',
            '_host_tool_source_refs',
            '_pipeline_bound_plugins',
            '_pipeline_bound_mcp_servers',
            '_pipeline_bound_skills',
            '_pipeline_mcp_resource_attachments',
            '_pipeline_mcp_resource_agent_read_enabled',
            '_activated_skills',
            '_fallback_model_uuids',
            '_monitoring_message_id',
            '_sandbox_outbound_collected',
            '_authorized_models',
            '_permission_tools',
            '_routed_by_rule',
        ],
    )
    async def test_set_query_var_rejects_host_reserved_keys(self, mock_app, key):
        runtime_handler = make_handler(mock_app)
        original_variables = {key: 'host-owned'}
        mock_query = SimpleNamespace(variables=original_variables.copy())
        mock_app.query_pool.cached_queries['test-query'] = mock_query

        response = await runtime_handler.actions[PluginToRuntimeAction.SET_QUERY_VAR.value](
            {
                'query_id': 'test-query',
                'key': key,
                'value': 'plugin-overwrite',
            }
        )

        assert response.code != 0
        assert response.message == f'Query variable {key!r} is reserved for LangBot Host'
        assert mock_query.variables == original_variables
        mock_app.logger.warning.assert_called_once()

    @pytest.mark.asyncio
    @pytest.mark.parametrize(
        'key',
        [
            'business_context',
            '_ltm_context',
            '_knowledge_base_uuids',
            '_skill_authoring_post_response_candidate',
        ],
    )
    async def test_set_query_var_keeps_plugin_business_variables_writable(self, mock_app, key):
        runtime_handler = make_handler(mock_app)
        mock_query = SimpleNamespace(variables={})
        mock_app.query_pool.cached_queries['test-query'] = mock_query

        response = await runtime_handler.actions[PluginToRuntimeAction.SET_QUERY_VAR.value](
            {
                'query_id': 'test-query',
                'key': key,
                'value': {'plugin': 'value'},
            }
        )

        assert response.code == 0
        assert mock_query.variables[key] == {'plugin': 'value'}

    @pytest.mark.asyncio
    @pytest.mark.parametrize('key', ['', None, 7])
    async def test_set_query_var_rejects_invalid_key_shapes(self, mock_app, key):
        runtime_handler = make_handler(mock_app)
        mock_query = SimpleNamespace(variables={})
        mock_app.query_pool.cached_queries['test-query'] = mock_query

        response = await runtime_handler.actions[PluginToRuntimeAction.SET_QUERY_VAR.value](
            {
                'query_id': 'test-query',
                'key': key,
                'value': 'value',
            }
        )

        assert response.code != 0
        assert response.message == 'Query variable key must be a non-empty string'
        assert mock_query.variables == {}

    @pytest.mark.asyncio
    async def test_get_query_var_success(self, mock_app):
        """Test get_query_var retrieves variable from query."""
        runtime_handler = make_handler(mock_app)
        mock_query = SimpleNamespace()
        mock_query.variables = {'existing_var': 'existing_value'}

        mock_app.query_pool.cached_queries['test-query'] = mock_query

        response = await runtime_handler.actions[PluginToRuntimeAction.GET_QUERY_VAR.value](
            {
                'query_id': 'test-query',
                'key': 'existing_var',
            }
        )

        assert response.code == 0
        assert response.data == {'value': 'existing_value'}

    @pytest.mark.asyncio
    async def test_get_query_vars_multiple(self, mock_app):
        """Test get_query_vars returns the query's variable mapping."""
        runtime_handler = make_handler(mock_app)
        mock_query = SimpleNamespace()
        mock_query.variables = {'var1': 'val1', 'var2': 'val2', 'var3': 'val3'}

        mock_app.query_pool.cached_queries['test-query'] = mock_query

        response = await runtime_handler.actions[PluginToRuntimeAction.GET_QUERY_VARS.value](
            {
                'query_id': 'test-query',
            }
        )

        assert response.code == 0
        assert response.data == {'vars': mock_query.variables}


class TestHandlerRagErrorResponse:
    """Tests for _make_rag_error_response helper."""

    def test_make_rag_error_response_basic(self):
        """Test basic error response creation."""
        from langbot.pkg.plugin.handler import _make_rag_error_response

        error = Exception('test error')
        response = _make_rag_error_response(error, 'TestError')

        # ActionResponse is a pydantic model, check message field
        assert 'TestError' in response.message
        assert 'test error' in response.message
        assert 'Exception' in response.message

    def test_make_rag_error_response_with_context(self):
        """Test error response with extra context."""
        from langbot.pkg.plugin.handler import _make_rag_error_response

        error = ValueError('invalid input')
        response = _make_rag_error_response(error, 'ValidationError', field='name', value='test')

        assert 'ValidationError' in response.message
        assert 'field=name' in response.message
        assert 'value=test' in response.message
        assert 'ValueError' in response.message

    def test_make_rag_error_response_exception_type(self):
        """Test error response includes exception type."""
        from langbot.pkg.plugin.handler import _make_rag_error_response

        error = RuntimeError('connection failed')
        response = _make_rag_error_response(error, 'ConnectionError')

        assert 'RuntimeError' in response.message
        assert 'ConnectionError' in response.message
        assert 'connection failed' in response.message

    def test_make_rag_error_response_empty_context(self):
        """Test error response with no extra context."""
        from langbot.pkg.plugin.handler import _make_rag_error_response

        error = KeyError('missing_key')
        response = _make_rag_error_response(error, 'LookupError')

        # No context parts means no brackets
        assert '[' in response.message  # Still has error type bracket
        assert 'KeyError' in response.message


class TestHandlerPluginDiagnostic:
    @pytest.mark.asyncio
    async def test_notify_plugin_diagnostic_falls_back_to_raw_protocol_action(self):
        """Diagnostic forwarding works before the SDK enum exists."""
        app = SimpleNamespace()
        app.logger = SimpleNamespace(debug=MagicMock())
        runtime_handler = make_handler(app)
        runtime_handler.call_action = AsyncMock(return_value={})

        payload = {'code': 'response_delivery_failed'}
        await runtime_handler.notify_plugin_diagnostic(payload)

        action = runtime_handler.call_action.await_args.args[0]
        assert action.value == 'plugin_diagnostic'
        assert runtime_handler.call_action.await_args.args[1] is payload
        assert runtime_handler.call_action.await_args.kwargs['timeout'] == 5

    def test_langbot_to_runtime_action_uses_enum_when_available(self):
        """The compatibility helper should prefer SDK enums once available."""
        from langbot.pkg.plugin import handler as plugin_handler

        sentinel = object()
        original = plugin_handler.LangBotToRuntimeAction
        plugin_handler.LangBotToRuntimeAction = SimpleNamespace(PLUGIN_DIAGNOSTIC=sentinel)
        try:
            assert plugin_handler._langbot_to_runtime_action('PLUGIN_DIAGNOSTIC', 'plugin_diagnostic') is sentinel
        finally:
            plugin_handler.LangBotToRuntimeAction = original


class TestConstantsSemanticVersion:
    """Tests for version constant access."""

    def test_semantic_version_exists(self):
        """Test semantic_version is defined."""
        from langbot.pkg.utils import constants

        assert hasattr(constants, 'semantic_version')
        assert constants.semantic_version.startswith('v')

    def test_edition_exists(self):
        """Test edition constant is defined."""
        from langbot.pkg.utils import constants

        assert hasattr(constants, 'edition')
        assert constants.edition == 'community'