#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Test cases for MCP Server functionality

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

import json
import tempfile
from typing import Any, Dict, List, Optional
# 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__])