"""Tests for MCP protocol compliance over HTTP transport"""

import asyncio
import json
from typing import Any

import pytest


@pytest.mark.journey_system
class TestMCPProtocolCompliance:
    """Test MCP protocol compliance over HTTP"""

    def test_jsonrpc_request_structure(self) -> None:
        """Test that JSON-RPC 2.0 request structure is correct"""
        # Test basic structure
        request = {
            "jsonrpc": "2.0",
            "method": "initialize",
            "params": {
                "protocolVersion": "2024-11-05",
                "capabilities": {"tools": {}},
                "clientInfo": {"name": "test-client", "version": "1.0.0"},
            },
            "id": 1,
        }

        assert request["jsonrpc"] == "2.0"
        assert "method" in request
        assert "id" in request
        assert isinstance(request["params"], dict)

    def test_tool_call_request_structure(self) -> None:
        """Test tool call request structure"""
        request = {
            "jsonrpc": "2.0",
            "method": "tools/call",
            "params": {"name": "stock_price", "arguments": {"symbol": "AAPL"}},
            "id": 2,
        }

        assert request["method"] == "tools/call"
        params = request["params"]
        assert isinstance(params, dict)
        assert "name" in params
        assert "arguments" in params
        assert isinstance(params["arguments"], dict)

    def test_list_tools_request_structure(self) -> None:
        """Test list tools request structure"""
        request = {"jsonrpc": "2.0", "method": "tools/list", "id": 3}

        assert request["method"] == "tools/list"
        assert "id" in request
        # No params required for list tools

    def test_response_structure(self) -> None:
        """Test JSON-RPC 2.0 response structure"""
        # Success response
        success_response = {
            "jsonrpc": "2.0",
            "result": {"data": "some result"},
            "id": 1,
        }

        assert success_response["jsonrpc"] == "2.0"
        assert "result" in success_response
        assert success_response["id"] == 1
        assert "error" not in success_response

        # Error response
        error_response = {
            "jsonrpc": "2.0",
            "error": {"code": -32601, "message": "Method not found"},
            "id": 1,
        }

        assert error_response["jsonrpc"] == "2.0"
        assert "error" in error_response
        error_obj = error_response["error"]
        assert isinstance(error_obj, dict)
        assert "code" in error_obj
        assert "message" in error_obj
        assert "result" not in error_response


@pytest.mark.integration
@pytest.mark.journey_system
class TestHTTPTransportReliability:
    """Test HTTP transport reliability features"""

    async def test_concurrent_connection_handling(self) -> None:
        """Test handling of concurrent connections"""
        # This would test with a real server instance
        # For now, verify the test structure

        async def make_request(session_id: int) -> dict[str, Any]:
            """Simulate a concurrent request"""
            return {"session_id": session_id, "status": "completed"}

        # Simulate concurrent requests
        tasks = [make_request(i) for i in range(5)]
        results = await asyncio.gather(*tasks)

        assert len(results) == 5
        for i, result in enumerate(results):
            assert result["session_id"] == i
            assert result["status"] == "completed"

    async def test_timeout_handling(self) -> None:
        """Test request timeout handling"""

        # Test timeout behavior
        async def slow_operation() -> str:
            await asyncio.sleep(0.1)  # Simulate slow operation
            return "completed"

        # Test with timeout
        try:
            result = await asyncio.wait_for(slow_operation(), timeout=0.05)
            # If this succeeds, operation was faster than expected
            assert result == "completed"
        except TimeoutError:
            # Expected for timeout scenario
            pass

    def test_session_id_generation(self) -> None:
        """Test session ID generation and uniqueness"""
        import uuid

        # Test session ID format
        session_id = str(uuid.uuid4())
        assert len(session_id) == 36  # Standard UUID length
        assert session_id.count("-") == 4  # Standard UUID format

        # Test uniqueness
        session_ids = [str(uuid.uuid4()) for _ in range(100)]
        assert len(set(session_ids)) == 100  # All unique

    def test_error_code_mapping(self) -> None:
        """Test JSON-RPC error code mapping"""
        error_codes = {
            "parse_error": -32700,
            "invalid_request": -32600,
            "method_not_found": -32601,
            "invalid_params": -32602,
            "internal_error": -32603,
        }

        # Verify standard error codes
        assert error_codes["parse_error"] == -32700
        assert error_codes["method_not_found"] == -32601
        assert error_codes["internal_error"] == -32603


@pytest.mark.journey_system
class TestHTTPTransportFeatures:
    """Test HTTP transport specific features"""

    def test_http_headers_structure(self) -> None:
        """Test proper HTTP headers for MCP communication"""
        headers = {
            "content-type": "application/json",
            "accept": "application/json",
            "user-agent": "test-mcp-client/1.0",
            "x-mcp-session-id": "test-session-123",
        }

        assert headers["content-type"] == "application/json"
        assert headers["accept"] == "application/json"
        assert "x-mcp-session-id" in headers

    def test_sse_event_format(self) -> None:
        """Test Server-Sent Events format"""
        # SSE event format
        event_data = {
            "event": "tool_result",
            "data": json.dumps(
                {
                    "jsonrpc": "2.0",
                    "result": {"status": "completed", "data": "result"},
                    "id": 1,
                }
            ),
            "id": "event-123",
        }

        assert event_data["event"] == "tool_result"
        assert "data" in event_data
        assert "id" in event_data

        # Parse data to verify JSON-RPC structure
        data = json.loads(event_data["data"])
        assert data["jsonrpc"] == "2.0"
        assert "result" in data

    def test_http_status_codes(self) -> None:
        """Test proper HTTP status code usage"""
        status_codes = {
            "success": 200,
            "created": 201,
            "bad_request": 400,
            "unauthorized": 401,
            "forbidden": 403,
            "not_found": 404,
            "method_not_allowed": 405,
            "timeout": 408,
            "internal_error": 500,
            "service_unavailable": 503,
        }

        # Verify standard codes are used correctly
        assert status_codes["success"] == 200
        assert status_codes["unauthorized"] == 401
        assert status_codes["not_found"] == 404
        assert status_codes["internal_error"] == 500


@pytest.mark.integration
@pytest.mark.journey_system
class TestMCPToolIntegration:
    """Test MCP tool integration over HTTP"""

    def test_tool_metadata_structure(self) -> None:
        """Test tool metadata structure"""
        tool_metadata = {
            "name": "stock_price",
            "description": "Get current stock price and basic metrics",
            "inputSchema": {
                "type": "object",
                "properties": {
                    "symbol": {"type": "string", "description": "Stock ticker symbol"}
                },
                "required": ["symbol"],
            },
        }

        assert "name" in tool_metadata
        assert "description" in tool_metadata
        assert "inputSchema" in tool_metadata
        input_schema = tool_metadata["inputSchema"]
        assert isinstance(input_schema, dict)
        assert input_schema["type"] == "object"
        assert "properties" in input_schema

    def test_tool_result_structure(self) -> None:
        """Test tool result structure"""
        tool_result = {
            "result": {
                "symbol": "AAPL",
                "price": 150.00,
                "change": 2.50,
                "status": "success",
            }
        }

        assert "result" in tool_result
        assert isinstance(tool_result["result"], dict)
        assert "status" in tool_result["result"]

    def test_tool_error_structure(self) -> None:
        """Test tool error structure"""
        tool_error = {
            "result": {
                "error": "Invalid symbol provided",
                "status": "error",
                "error_code": "INVALID_SYMBOL",
            }
        }

        assert "result" in tool_error
        assert "error" in tool_error["result"]
        assert tool_error["result"]["status"] == "error"


@pytest.mark.journey_system
class TestHTTPMiddleware:
    """Test HTTP middleware functionality"""

    def test_timeout_middleware_config(self) -> None:
        """Test timeout middleware configuration"""
        timeout_config = {
            "default_timeout": 120.0,
            "max_timeout": 300.0,
            "connection_timeout": 10.0,
        }

        assert timeout_config["default_timeout"] == 120.0
        assert timeout_config["max_timeout"] >= timeout_config["default_timeout"]
        assert timeout_config["connection_timeout"] < timeout_config["default_timeout"]

    def test_security_middleware_config(self) -> None:
        """Test security middleware configuration"""
        security_config = {
            "allowed_origins": ["http://localhost:*", "https://localhost:*"],
            "blocked_origins": ["https://malicious-site.com"],
            "require_origin_validation": True,
        }

        allowed_origins = security_config["allowed_origins"]
        assert isinstance(allowed_origins, list)
        assert len(allowed_origins) > 0
        assert "localhost" in allowed_origins[0]
        assert security_config["require_origin_validation"] is True

    def test_cors_middleware_config(self) -> None:
        """Test CORS middleware configuration"""
        cors_config = {
            "allow_origins": ["http://localhost:*", "https://localhost:*"],
            "allow_credentials": True,
            "allow_methods": ["GET", "POST", "OPTIONS"],
            "allow_headers": ["*"],
        }

        allow_methods = cors_config["allow_methods"]
        assert isinstance(allow_methods, list)
        assert "GET" in allow_methods
        assert "POST" in allow_methods
        assert cors_config["allow_credentials"] is True
