#!/usr/bin/env python3
"""
Test cases for MCP Server functionality

Tests the core MCP server implementation including initialization,
tool registration, and basic protocol compliance.
"""

import asyncio

# Mock functionality now provided by pytest-mock
import pytest
import pytest_asyncio

from tree_sitter_analyzer.mcp import MCP_INFO


@pytest_asyncio.fixture(autouse=True)
async def cleanup_event_loop():
    """イベントループクリーンアップフィクスチャ（根本修正版）"""
    yield

    # 明示的にシングルトンインスタンスをクリーンアップ
    try:
        from tree_sitter_analyzer.core.analysis_engine import UnifiedAnalysisEngine
        from tree_sitter_analyzer.core.cache_service import CacheService

        # UnifiedAnalysisEngineのクリーンアップ
        if (
            hasattr(UnifiedAnalysisEngine, "_instance")
            and UnifiedAnalysisEngine._instance
        ):
            engine = UnifiedAnalysisEngine._instance
            if hasattr(engine, "cleanup"):
                engine.cleanup()

        # CacheServiceのクリーンアップ
        if hasattr(CacheService, "_instance") and CacheService._instance:
            cache_service = CacheService._instance
            if hasattr(cache_service, "clear_all_caches"):
                cache_service.clear_all_caches()

    except Exception as e:
        print(f"Warning: Error during explicit cleanup: {e}")

    # テスト後のクリーンアップ
    try:
        loop = asyncio.get_running_loop()
    except RuntimeError:
        loop = None

    if loop and not loop.is_closed():
        # 残っているタスクを調査
        pending = asyncio.all_tasks(loop)
        current_task = asyncio.current_task(loop)

        # 現在のタスクを除外
        pending = {task for task in pending if task is not current_task}

        if pending:
            # タスクをキャンセル
            for task in pending:
                if not task.done():
                    task.cancel()

            # 短時間待機してキャンセルを処理
            try:
                await asyncio.wait_for(
                    asyncio.gather(*pending, return_exceptions=True), timeout=1.0
                )
            except asyncio.TimeoutError:
                print(f"Warning: {len(pending)} tasks did not complete within timeout")
                # 強制的にタスクの状態を確認
                for i, task in enumerate(pending):
                    if not task.done():
                        print(f"  Task {i} is still running: {task}")
                        # 強制終了を試行
                        try:
                            task.cancel()
                        except Exception:
                            pass


class TestMCPServerInitialization:
    """Test MCP server initialization and basic functionality"""

    def test_mcp_info_structure(self) -> None:
        """Test that MCP_INFO contains required fields"""
        assert "name" in MCP_INFO
        assert "version" in MCP_INFO
        assert "description" in MCP_INFO
        assert "protocol_version" in MCP_INFO
        assert "capabilities" in MCP_INFO

        # Test capabilities structure
        capabilities = MCP_INFO["capabilities"]
        assert "tools" in capabilities
        assert "resources" in capabilities
        assert "prompts" in capabilities
        assert "logging" in capabilities

        # Test expected capability values
        assert isinstance(capabilities["tools"], dict)
        assert isinstance(capabilities["resources"], dict)
        assert isinstance(capabilities["logging"], dict)

    def test_mcp_info_values(self) -> None:
        """Test MCP_INFO contains expected values"""
        assert MCP_INFO["name"] == "tree-sitter-analyzer-mcp"
        assert MCP_INFO["protocol_version"] == "2024-11-05"
        assert isinstance(MCP_INFO["version"], str)
        assert isinstance(MCP_INFO["description"], str)


class TestMCPServerCore:
    """Test core MCP server functionality"""

    def setup_method(self) -> None:
        """Set up test fixtures"""
        self.server = None  # Will be initialized when server class is implemented

    def test_server_initialization_placeholder(self) -> None:
        """Placeholder test for server initialization"""
        # This test will be implemented once the server class exists
        assert True, "Placeholder test - server class not yet implemented"

    def test_tool_registration_placeholder(self) -> None:
        """Placeholder test for tool registration"""
        # This test will be implemented once the server class exists
        assert True, "Placeholder test - tool registration not yet implemented"

    def test_resource_registration_placeholder(self) -> None:
        """Placeholder test for resource registration"""
        # This test will be implemented once the server class exists
        assert True, "Placeholder test - resource registration not yet implemented"


class TestMCPProtocolCompliance:
    """Test MCP protocol compliance"""

    def test_protocol_version_format(self) -> None:
        """Test that protocol version follows expected format"""
        import re

        version = MCP_INFO["protocol_version"]
        assert re.match(r"^\d{4}-\d{2}-\d{2}$", version)

    def test_required_capabilities(self) -> None:
        """Test that required capabilities are present"""
        capabilities = MCP_INFO["capabilities"]
        required_caps = ["tools", "resources", "prompts", "logging"]

        for cap in required_caps:
            assert cap in capabilities
            assert isinstance(capabilities[cap], dict)


class TestMCPServerErrorHandling:
    """Test error handling in MCP server"""

    def test_error_handling_placeholder(self) -> None:
        """Placeholder test for error handling"""
        # This test will be implemented once the server class exists
        assert True, "Placeholder test - error handling not yet implemented"


class TestMCPServerIntegration:
    """Test integration with existing analyzer components"""

    def test_analyzer_integration_placeholder(self) -> None:
        """Placeholder test for analyzer integration"""
        # This test will be implemented once integration is complete
        assert True, "Placeholder test - analyzer integration not yet implemented"


if __name__ == "__main__":
    pytest.main([__file__])
