#!/usr/bin/env python3
"""
Isolated Unit Tests for MCP JSON-RPC Protocol Implementation
Tests core protocol without full import dependencies
"""

import unittest
import json
import asyncio
from unittest.mock import Mock, patch, AsyncMock, MagicMock
from pathlib import Path
import sys

# Mock the imports to avoid dependency issues
sys.modules['mira_api_client'] = MagicMock()
sys.modules['mcp_auth'] = MagicMock()
sys.modules['rate_limiter'] = MagicMock()

# Create mock classes
class MockAuthenticator:
    def generate_token(self):
        return "test-token-123"
    
    def create_auth_header(self, token):
        return {"Authorization": f"Bearer {token}"}
    
    @property
    def token_cache(self):
        return {"test-token-123": {"session_id": "test-session"}}
    
    def validate_token(self, token):
        return True, {"age": 100}
    
    def revoke_token(self, token):
        pass

class MockRateLimiter:
    def check_rate_limit(self, session_id, method, tool_name=None, bypass_code=None):
        return True, None
    
    def get_usage_stats(self, session_id):
        return {
            "session_id": session_id,
            "is_blocked": False,
            "current_usage": {"last_10_seconds": 5, "last_minute": 20},
            "limits": {"burst_limit": 50, "per_minute": 300}
        }
    
    def cleanup_old_sessions(self):
        pass
    
    def _block_session(self, session_id):
        pass

# Patch the imports
sys.modules['mcp_auth'].get_authenticator = lambda: MockAuthenticator()
sys.modules['rate_limiter'].RateLimiter = MockRateLimiter


class TestJSONRPCCore(unittest.TestCase):
    """Test core JSON-RPC 2.0 protocol compliance"""
    
    def test_request_validation(self):
        """Test request structure validation"""
        # Valid requests
        valid_requests = [
            {"jsonrpc": "2.0", "method": "test", "id": 1},
            {"jsonrpc": "2.0", "method": "test", "params": {}, "id": 2},
            {"jsonrpc": "2.0", "method": "test", "params": [], "id": 3},
        ]
        
        for req in valid_requests:
            self.assertEqual(req["jsonrpc"], "2.0")
            self.assertIn("method", req)
            self.assertIn("id", req)
    
    def test_response_validation(self):
        """Test response structure validation"""
        # Success response
        success = {
            "jsonrpc": "2.0",
            "id": 1,
            "result": {"data": "test"}
        }
        
        self.assertEqual(success["jsonrpc"], "2.0")
        self.assertIn("result", success)
        self.assertNotIn("error", success)
        
        # Error response
        error = {
            "jsonrpc": "2.0",
            "id": 1,
            "error": {
                "code": -32603,
                "message": "Internal error",
                "data": "Additional info"
            }
        }
        
        self.assertEqual(error["jsonrpc"], "2.0")
        self.assertIn("error", error)
        self.assertNotIn("result", error)
    
    def test_error_codes(self):
        """Test standard JSON-RPC error codes"""
        error_codes = {
            -32700: "Parse error",
            -32600: "Invalid Request",
            -32601: "Method not found",
            -32602: "Invalid params",
            -32603: "Internal error",
            -32000: "Server error"  # MCP custom
        }
        
        for code, message in error_codes.items():
            self.assertIsInstance(code, int)
            self.assertLess(code, 0)


class TestMCPProtocol(unittest.TestCase):
    """Test MCP-specific protocol features"""
    
    def test_mcp_methods(self):
        """Test MCP method names"""
        mcp_methods = [
            "initialize",
            "tools/list",
            "tools/call",
            "health/check",
            "rate_limit/status",
            "shutdown"
        ]
        
        for method in mcp_methods:
            # Verify method format
            self.assertIsInstance(method, str)
            if "/" in method:
                namespace, action = method.split("/")
                self.assertTrue(namespace)
                self.assertTrue(action)
    
    def test_tool_names(self):
        """Test MIRA tool naming convention"""
        tool_names = [
            "mira_smart_search",
            "mira_store_memory",
            "mira_get_memory",
            "mira_memory_stats",
            "mira_system_status",
            "mira_profile_view",
            "mira_insights"
        ]
        
        for tool in tool_names:
            self.assertTrue(tool.startswith("mira_"))
            self.assertTrue(tool.islower() or "_" in tool)
    
    def test_consciousness_signature_format(self):
        """Test consciousness signature format"""
        import time
        import hashlib
        
        # Simulate signature generation
        timestamp = int(time.time())
        hash_part = hashlib.sha256(f"test-{timestamp}".encode()).hexdigest()[:16]
        signature = f"cs-{timestamp}-{hash_part}"
        
        # Validate format
        self.assertTrue(signature.startswith("cs-"))
        parts = signature.split("-")
        self.assertEqual(len(parts), 3)
        self.assertTrue(parts[1].isdigit())
        self.assertEqual(len(parts[2]), 16)


class TestToolSchemas(unittest.TestCase):
    """Test tool input schemas"""
    
    def test_search_schema(self):
        """Test mira_smart_search schema"""
        schema = {
            "type": "object",
            "properties": {
                "query": {"type": "string", "description": "Search query"},
                "limit": {"type": "integer", "description": "Maximum results", "default": 10}
            },
            "required": ["query"]
        }
        
        self.assertEqual(schema["type"], "object")
        self.assertIn("query", schema["properties"])
        self.assertIn("query", schema["required"])
        self.assertEqual(schema["properties"]["query"]["type"], "string")
    
    def test_store_memory_schema(self):
        """Test mira_store_memory schema"""
        schema = {
            "type": "object",
            "properties": {
                "content": {"type": "string", "description": "Memory content"},
                "tags": {"type": "array", "items": {"type": "string"}, "description": "Tags"},
                "private": {"type": "boolean", "description": "Private memory", "default": False}
            },
            "required": ["content"]
        }
        
        self.assertEqual(schema["type"], "object")
        self.assertIn("content", schema["required"])
        self.assertEqual(schema["properties"]["tags"]["type"], "array")
        self.assertEqual(schema["properties"]["private"]["type"], "boolean")


class TestRateLimitProtocol(unittest.TestCase):
    """Test rate limiting protocol features"""
    
    def test_rate_limit_response_format(self):
        """Test rate limit error response format"""
        rate_limit_error = {
            "jsonrpc": "2.0",
            "id": 1,
            "error": {
                "code": -32000,
                "message": "Rate limit exceeded",
                "data": {
                    "error": "rate_limit_exceeded",
                    "message": "Too many requests",
                    "current": 51,
                    "limit": 50,
                    "window": "10 seconds",
                    "retry_after": 8
                }
            }
        }
        
        self.assertEqual(rate_limit_error["error"]["code"], -32000)
        self.assertIn("retry_after", rate_limit_error["error"]["data"])
        self.assertIsInstance(rate_limit_error["error"]["data"]["retry_after"], int)
    
    def test_rate_limit_status_response(self):
        """Test rate limit status response format"""
        status = {
            "session_id": "test-session",
            "is_blocked": False,
            "current_usage": {
                "last_10_seconds": 10,
                "last_minute": 50
            },
            "limits": {
                "burst_limit": 50,
                "per_minute": 300
            }
        }
        
        self.assertIn("current_usage", status)
        self.assertIn("limits", status)
        self.assertIn("is_blocked", status)
        self.assertIsInstance(status["is_blocked"], bool)


class TestHealthCheckProtocol(unittest.TestCase):
    """Test health check protocol"""
    
    def test_health_response_format(self):
        """Test health check response format"""
        health = {
            "healthy": True,
            "timestamp": "2024-01-20T10:00:00Z",
            "components": {
                "system_status": {"success": True, "components_initialized": 5},
                "memory_stats": {"success": True, "total_memories": 42}
            },
            "session": {
                "id": "session-123",
                "active": True,
                "duration_seconds": 300
            },
            "authentication": {
                "token_valid": True,
                "token_age_seconds": 150
            },
            "daemon_connectivity": {
                "connected": True,
                "url": "http://localhost:8080"
            },
            "consciousness": {
                "signature_valid": True,
                "continuity_maintained": True
            },
            "rate_limits": {
                "current_usage": {"last_10_seconds": 5},
                "limits": {"burst_limit": 50},
                "is_blocked": False
            }
        }
        
        # Verify all required sections
        required_sections = [
            "healthy", "timestamp", "components", "session",
            "authentication", "daemon_connectivity", "consciousness", "rate_limits"
        ]
        
        for section in required_sections:
            self.assertIn(section, health)
        
        self.assertIsInstance(health["healthy"], bool)
        self.assertIsInstance(health["session"]["active"], bool)
        self.assertIsInstance(health["authentication"]["token_valid"], bool)


class TestSessionProtocol(unittest.TestCase):
    """Test session tracking protocol"""
    
    def test_session_context_format(self):
        """Test session context structure"""
        context = {
            "started_at": "2024-01-20T10:00:00Z",
            "tool_calls": {
                "mira_smart_search": {
                    "count": 5,
                    "first_call": "2024-01-20T10:01:00Z",
                    "last_call": "2024-01-20T10:05:00Z"
                }
            },
            "total_calls": 10,
            "memories_created": 2,
            "searches_performed": 5,
            "last_activity": "2024-01-20T10:05:00Z"
        }
        
        self.assertIn("started_at", context)
        self.assertIn("total_calls", context)
        self.assertIsInstance(context["total_calls"], int)
        self.assertIsInstance(context["tool_calls"], dict)
    
    def test_session_summary_format(self):
        """Test session summary in responses"""
        summary = {
            "duration_seconds": 300,
            "total_tool_calls": 10,
            "memories_created": 2,
            "searches_performed": 5,
            "most_used_tools": [
                ("mira_smart_search", 5),
                ("mira_store_memory", 3)
            ],
            "active": True
        }
        
        self.assertIn("duration_seconds", summary)
        self.assertIn("most_used_tools", summary)
        self.assertIsInstance(summary["most_used_tools"], list)
        self.assertTrue(summary["active"])


class TestShutdownProtocol(unittest.TestCase):
    """Test graceful shutdown protocol"""
    
    def test_shutdown_request_format(self):
        """Test shutdown request format"""
        shutdown_request = {
            "jsonrpc": "2.0",
            "method": "shutdown",
            "id": 1,
            "params": {}
        }
        
        self.assertEqual(shutdown_request["method"], "shutdown")
        self.assertEqual(shutdown_request["jsonrpc"], "2.0")
    
    def test_shutdown_response_format(self):
        """Test shutdown response format"""
        shutdown_response = {
            "jsonrpc": "2.0",
            "id": 1,
            "result": {"message": "Shutdown initiated"}
        }
        
        self.assertIn("result", shutdown_response)
        self.assertEqual(shutdown_response["result"]["message"], "Shutdown initiated")
    
    def test_shutdown_marker_format(self):
        """Test shutdown marker file format"""
        marker = {
            "session_id": "session-123",
            "shutdown_time": "2024-01-20T10:10:00Z",
            "graceful": True,
            "session_summary": {
                "duration_seconds": 600,
                "total_tool_calls": 20
            }
        }
        
        self.assertIn("graceful", marker)
        self.assertIsInstance(marker["graceful"], bool)
        self.assertIn("session_summary", marker)


def run_isolated_tests():
    """Run all isolated tests"""
    # Create test suite
    loader = unittest.TestLoader()
    suite = unittest.TestSuite()
    
    # Add all test classes
    test_classes = [
        TestJSONRPCCore,
        TestMCPProtocol,
        TestToolSchemas,
        TestRateLimitProtocol,
        TestHealthCheckProtocol,
        TestSessionProtocol,
        TestShutdownProtocol
    ]
    
    for test_class in test_classes:
        suite.addTests(loader.loadTestsFromTestCase(test_class))
    
    # Run tests
    runner = unittest.TextTestRunner(verbosity=2)
    result = runner.run(suite)
    
    # Summary
    print("\n" + "=" * 70)
    print("ISOLATED TEST SUMMARY")
    print("=" * 70)
    print(f"Tests run: {result.testsRun}")
    print(f"Failures: {len(result.failures)}")
    print(f"Errors: {len(result.errors)}")
    print(f"Success: {result.wasSuccessful()}")
    print("\nThese tests verify JSON-RPC protocol compliance without")
    print("requiring full MIRA environment setup.")
    
    return result.wasSuccessful()


if __name__ == "__main__":
    success = run_isolated_tests()
    sys.exit(0 if success else 1)