/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import * as ClientLib from '@modelcontextprotocol/sdk/client/index.js';
import { SSEClientTransport } from '@modelcontextprotocol/sdk/client/sse.js';
import * as SdkClientStdioLib from '@modelcontextprotocol/sdk/client/stdio.js';
import { StreamableHTTPClientTransport, StreamableHTTPError, } from '@modelcontextprotocol/sdk/client/streamableHttp.js';
import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
import { AuthProviderType } from '../config/config.js';
import { GoogleCredentialProvider } from '../mcp/google-auth-provider.js';
import { MCPOAuthProvider } from '../mcp/oauth-provider.js';
import { MCPOAuthTokenStorage } from '../mcp/oauth-token-storage.js';
import { OAuthUtils } from '../mcp/oauth-utils.js';
import { ToolListChangedNotificationSchema } from '@modelcontextprotocol/sdk/types.js';
import { WorkspaceContext } from '../utils/workspaceContext.js';
import { connectToMcpServer, createTransport, hasNetworkTransport, isEnabled, McpClient, populateMcpServerCommand, } from './mcp-client.js';
import * as fs from 'node:fs';
import * as os from 'node:os';
import * as path from 'node:path';
import { coreEvents } from '../utils/events.js';
vi.mock('@modelcontextprotocol/sdk/client/stdio.js');
vi.mock('@modelcontextprotocol/sdk/client/index.js');
vi.mock('@google/genai');
vi.mock('../mcp/oauth-provider.js');
vi.mock('../mcp/oauth-token-storage.js');
vi.mock('../mcp/oauth-utils.js');
vi.mock('google-auth-library');
import { GoogleAuth } from 'google-auth-library';
vi.mock('../utils/events.js', () => ({
    coreEvents: {
        emitFeedback: vi.fn(),
        emitConsoleLog: vi.fn(),
    },
}));
describe('mcp-client', () => {
    let workspaceContext;
    let testWorkspace;
    beforeEach(() => {
        // create a tmp dir for this test
        // Create a unique temporary directory for the workspace to avoid conflicts
        testWorkspace = fs.mkdtempSync(path.join(os.tmpdir(), 'gemini-agent-test-'));
        workspaceContext = new WorkspaceContext(testWorkspace);
    });
    afterEach(() => {
        vi.restoreAllMocks();
    });
    describe('McpClient', () => {
        it('should discover tools', async () => {
            const mockedClient = {
                connect: vi.fn(),
                discover: vi.fn(),
                disconnect: vi.fn(),
                getStatus: vi.fn(),
                registerCapabilities: vi.fn(),
                setRequestHandler: vi.fn(),
                setNotificationHandler: vi.fn(),
                getServerCapabilities: vi.fn().mockReturnValue({ tools: {} }),
                listTools: vi.fn().mockResolvedValue({
                    tools: [
                        {
                            name: 'testFunction',
                            inputSchema: {
                                type: 'object',
                                properties: {},
                            },
                        },
                    ],
                }),
                listPrompts: vi.fn().mockResolvedValue({
                    prompts: [],
                }),
                request: vi.fn().mockResolvedValue({}),
            };
            vi.mocked(ClientLib.Client).mockReturnValue(mockedClient);
            vi.spyOn(SdkClientStdioLib, 'StdioClientTransport').mockReturnValue({});
            const mockedToolRegistry = {
                registerTool: vi.fn(),
                sortTools: vi.fn(),
                getMessageBus: vi.fn().mockReturnValue(undefined),
            };
            const promptRegistry = {
                registerPrompt: vi.fn(),
                removePromptsByServer: vi.fn(),
            };
            const resourceRegistry = {
                setResourcesForServer: vi.fn(),
                removeResourcesByServer: vi.fn(),
            };
            const client = new McpClient('test-server', {
                command: 'test-command',
            }, mockedToolRegistry, promptRegistry, resourceRegistry, workspaceContext, {}, false);
            await client.connect();
            await client.discover({});
            expect(mockedClient.listTools).toHaveBeenCalledWith({}, { timeout: 600000 });
        });
        it('should not skip tools even if a parameter is missing a type', async () => {
            const consoleWarnSpy = vi
                .spyOn(console, 'warn')
                .mockImplementation(() => { });
            const mockedClient = {
                connect: vi.fn(),
                discover: vi.fn(),
                disconnect: vi.fn(),
                getStatus: vi.fn(),
                registerCapabilities: vi.fn(),
                setRequestHandler: vi.fn(),
                setNotificationHandler: vi.fn(),
                getServerCapabilities: vi.fn().mockReturnValue({ tools: {} }),
                listTools: vi.fn().mockResolvedValue({
                    tools: [
                        {
                            name: 'validTool',
                            inputSchema: {
                                type: 'object',
                                properties: {
                                    param1: { type: 'string' },
                                },
                            },
                        },
                        {
                            name: 'invalidTool',
                            inputSchema: {
                                type: 'object',
                                properties: {
                                    param1: { description: 'a param with no type' },
                                },
                            },
                        },
                    ],
                }),
                listPrompts: vi.fn().mockResolvedValue({
                    prompts: [],
                }),
                request: vi.fn().mockResolvedValue({}),
            };
            vi.mocked(ClientLib.Client).mockReturnValue(mockedClient);
            vi.spyOn(SdkClientStdioLib, 'StdioClientTransport').mockReturnValue({});
            const mockedToolRegistry = {
                registerTool: vi.fn(),
                sortTools: vi.fn(),
                getMessageBus: vi.fn().mockReturnValue(undefined),
            };
            const promptRegistry = {
                registerPrompt: vi.fn(),
                removePromptsByServer: vi.fn(),
            };
            const resourceRegistry = {
                setResourcesForServer: vi.fn(),
                removeResourcesByServer: vi.fn(),
            };
            const client = new McpClient('test-server', {
                command: 'test-command',
            }, mockedToolRegistry, promptRegistry, resourceRegistry, workspaceContext, {}, false);
            await client.connect();
            await client.discover({});
            expect(mockedToolRegistry.registerTool).toHaveBeenCalledTimes(2);
            expect(consoleWarnSpy).not.toHaveBeenCalled();
            consoleWarnSpy.mockRestore();
        });
        it('should handle errors when discovering prompts', async () => {
            const mockedClient = {
                connect: vi.fn(),
                discover: vi.fn(),
                disconnect: vi.fn(),
                getStatus: vi.fn(),
                registerCapabilities: vi.fn(),
                setRequestHandler: vi.fn(),
                setNotificationHandler: vi.fn(),
                getServerCapabilities: vi.fn().mockReturnValue({ prompts: {} }),
                listTools: vi.fn().mockResolvedValue({ tools: [] }),
                listPrompts: vi.fn().mockRejectedValue(new Error('Test error')),
                request: vi.fn().mockResolvedValue({}),
            };
            vi.mocked(ClientLib.Client).mockReturnValue(mockedClient);
            vi.spyOn(SdkClientStdioLib, 'StdioClientTransport').mockReturnValue({});
            const mockedToolRegistry = {
                registerTool: vi.fn(),
                getMessageBus: vi.fn().mockReturnValue(undefined),
            };
            const promptRegistry = {
                registerPrompt: vi.fn(),
                removePromptsByServer: vi.fn(),
            };
            const resourceRegistry = {
                setResourcesForServer: vi.fn(),
                removeResourcesByServer: vi.fn(),
            };
            const client = new McpClient('test-server', {
                command: 'test-command',
            }, mockedToolRegistry, promptRegistry, resourceRegistry, workspaceContext, {}, false);
            await client.connect();
            await expect(client.discover({})).rejects.toThrow('No prompts, tools, or resources found on the server.');
            expect(coreEvents.emitFeedback).toHaveBeenCalledWith('error', `Error discovering prompts from test-server: Test error`, expect.any(Error));
        });
        it('should not discover tools if server does not support them', async () => {
            const mockedClient = {
                connect: vi.fn(),
                discover: vi.fn(),
                disconnect: vi.fn(),
                getStatus: vi.fn(),
                registerCapabilities: vi.fn(),
                setRequestHandler: vi.fn(),
                setNotificationHandler: vi.fn(),
                getServerCapabilities: vi.fn().mockReturnValue({ prompts: {} }),
                listPrompts: vi.fn().mockResolvedValue({ prompts: [] }),
                request: vi.fn().mockResolvedValue({}),
            };
            vi.mocked(ClientLib.Client).mockReturnValue(mockedClient);
            vi.spyOn(SdkClientStdioLib, 'StdioClientTransport').mockReturnValue({});
            const mockedToolRegistry = {
                registerTool: vi.fn(),
                sortTools: vi.fn(),
                getMessageBus: vi.fn().mockReturnValue(undefined),
            };
            const promptRegistry = {
                registerPrompt: vi.fn(),
                removePromptsByServer: vi.fn(),
            };
            const resourceRegistry = {
                setResourcesForServer: vi.fn(),
                removeResourcesByServer: vi.fn(),
            };
            const client = new McpClient('test-server', {
                command: 'test-command',
            }, mockedToolRegistry, promptRegistry, resourceRegistry, workspaceContext, {}, false);
            await client.connect();
            await expect(client.discover({})).rejects.toThrow('No prompts, tools, or resources found on the server.');
        });
        it('should discover tools if server supports them', async () => {
            const mockedClient = {
                connect: vi.fn(),
                discover: vi.fn(),
                disconnect: vi.fn(),
                getStatus: vi.fn(),
                registerCapabilities: vi.fn(),
                setRequestHandler: vi.fn(),
                setNotificationHandler: vi.fn(),
                getServerCapabilities: vi.fn().mockReturnValue({ tools: {} }),
                listTools: vi.fn().mockResolvedValue({
                    tools: [
                        {
                            name: 'testTool',
                            description: 'A test tool',
                            inputSchema: { type: 'object', properties: {} },
                        },
                    ],
                }),
                listPrompts: vi.fn().mockResolvedValue({ prompts: [] }),
                request: vi.fn().mockResolvedValue({}),
            };
            vi.mocked(ClientLib.Client).mockReturnValue(mockedClient);
            vi.spyOn(SdkClientStdioLib, 'StdioClientTransport').mockReturnValue({});
            const mockedToolRegistry = {
                registerTool: vi.fn(),
                sortTools: vi.fn(),
                getMessageBus: vi.fn().mockReturnValue(undefined),
            };
            const promptRegistry = {
                registerPrompt: vi.fn(),
                removePromptsByServer: vi.fn(),
            };
            const resourceRegistry = {
                setResourcesForServer: vi.fn(),
                removeResourcesByServer: vi.fn(),
            };
            const client = new McpClient('test-server', {
                command: 'test-command',
            }, mockedToolRegistry, promptRegistry, resourceRegistry, workspaceContext, {}, false);
            await client.connect();
            await client.discover({});
            expect(mockedToolRegistry.registerTool).toHaveBeenCalledOnce();
        });
        it('should discover tools with $defs and $ref in schema', async () => {
            const mockedClient = {
                connect: vi.fn(),
                discover: vi.fn(),
                disconnect: vi.fn(),
                getStatus: vi.fn(),
                registerCapabilities: vi.fn(),
                setRequestHandler: vi.fn(),
                setNotificationHandler: vi.fn(),
                getServerCapabilities: vi.fn().mockReturnValue({ tools: {} }),
                listTools: vi.fn().mockResolvedValue({
                    tools: [
                        {
                            name: 'toolWithDefs',
                            description: 'A tool using $defs',
                            inputSchema: {
                                type: 'object',
                                properties: {
                                    param1: {
                                        $ref: '#/$defs/MyType',
                                    },
                                },
                                $defs: {
                                    MyType: {
                                        type: 'string',
                                        description: 'A defined type',
                                    },
                                },
                            },
                        },
                    ],
                }),
                listPrompts: vi.fn().mockResolvedValue({
                    prompts: [],
                }),
                request: vi.fn().mockResolvedValue({}),
            };
            vi.mocked(ClientLib.Client).mockReturnValue(mockedClient);
            vi.spyOn(SdkClientStdioLib, 'StdioClientTransport').mockReturnValue({});
            const mockedToolRegistry = {
                registerTool: vi.fn(),
                sortTools: vi.fn(),
                getMessageBus: vi.fn().mockReturnValue(undefined),
            };
            const promptRegistry = {
                registerPrompt: vi.fn(),
                removePromptsByServer: vi.fn(),
            };
            const resourceRegistry = {
                setResourcesForServer: vi.fn(),
                removeResourcesByServer: vi.fn(),
            };
            const client = new McpClient('test-server', {
                command: 'test-command',
            }, mockedToolRegistry, promptRegistry, resourceRegistry, workspaceContext, {}, false);
            await client.connect();
            await client.discover({});
            expect(mockedToolRegistry.registerTool).toHaveBeenCalledOnce();
            const registeredTool = vi.mocked(mockedToolRegistry.registerTool).mock
                .calls[0][0];
            expect(registeredTool.schema.parametersJsonSchema).toEqual({
                type: 'object',
                properties: {
                    param1: {
                        $ref: '#/$defs/MyType',
                    },
                },
                $defs: {
                    MyType: {
                        type: 'string',
                        description: 'A defined type',
                    },
                },
            });
        });
        it('should discover resources when a server only exposes resources', async () => {
            const mockedClient = {
                connect: vi.fn(),
                discover: vi.fn(),
                disconnect: vi.fn(),
                getStatus: vi.fn(),
                registerCapabilities: vi.fn(),
                setRequestHandler: vi.fn(),
                setNotificationHandler: vi.fn(),
                getServerCapabilities: vi.fn().mockReturnValue({ resources: {} }),
                request: vi.fn().mockImplementation(({ method }) => {
                    if (method === 'resources/list') {
                        return Promise.resolve({
                            resources: [
                                {
                                    uri: 'file:///tmp/resource.txt',
                                    name: 'resource',
                                    description: 'Test Resource',
                                    mimeType: 'text/plain',
                                },
                            ],
                        });
                    }
                    return Promise.resolve({ prompts: [] });
                }),
            };
            vi.mocked(ClientLib.Client).mockReturnValue(mockedClient);
            vi.spyOn(SdkClientStdioLib, 'StdioClientTransport').mockReturnValue({});
            const mockedToolRegistry = {
                registerTool: vi.fn(),
                sortTools: vi.fn(),
                getMessageBus: vi.fn().mockReturnValue(undefined),
            };
            const promptRegistry = {
                registerPrompt: vi.fn(),
                removePromptsByServer: vi.fn(),
            };
            const resourceRegistry = {
                setResourcesForServer: vi.fn(),
                removeResourcesByServer: vi.fn(),
            };
            const client = new McpClient('test-server', {
                command: 'test-command',
            }, mockedToolRegistry, promptRegistry, resourceRegistry, workspaceContext, {}, false);
            await client.connect();
            await client.discover({});
            expect(resourceRegistry.setResourcesForServer).toHaveBeenCalledWith('test-server', [
                expect.objectContaining({
                    uri: 'file:///tmp/resource.txt',
                    name: 'resource',
                }),
            ]);
        });
        it('refreshes registry when resource list change notification is received', async () => {
            let listCallCount = 0;
            let resourceListHandler;
            const mockedClient = {
                connect: vi.fn(),
                discover: vi.fn(),
                disconnect: vi.fn(),
                getStatus: vi.fn(),
                registerCapabilities: vi.fn(),
                setRequestHandler: vi.fn(),
                setNotificationHandler: vi.fn((_, handler) => {
                    resourceListHandler = handler;
                }),
                getServerCapabilities: vi
                    .fn()
                    .mockReturnValue({ resources: { listChanged: true } }),
                request: vi.fn().mockImplementation(({ method }) => {
                    if (method === 'resources/list') {
                        listCallCount += 1;
                        if (listCallCount === 1) {
                            return Promise.resolve({
                                resources: [
                                    {
                                        uri: 'file:///tmp/one.txt',
                                    },
                                ],
                            });
                        }
                        return Promise.resolve({
                            resources: [
                                {
                                    uri: 'file:///tmp/two.txt',
                                },
                            ],
                        });
                    }
                    return Promise.resolve({ prompts: [] });
                }),
            };
            vi.mocked(ClientLib.Client).mockReturnValue(mockedClient);
            vi.spyOn(SdkClientStdioLib, 'StdioClientTransport').mockReturnValue({});
            const mockedToolRegistry = {
                registerTool: vi.fn(),
                sortTools: vi.fn(),
                getMessageBus: vi.fn().mockReturnValue(undefined),
            };
            const promptRegistry = {
                registerPrompt: vi.fn(),
                removePromptsByServer: vi.fn(),
            };
            const resourceRegistry = {
                setResourcesForServer: vi.fn(),
                removeResourcesByServer: vi.fn(),
            };
            const client = new McpClient('test-server', {
                command: 'test-command',
            }, mockedToolRegistry, promptRegistry, resourceRegistry, workspaceContext, {}, false);
            await client.connect();
            await client.discover({});
            expect(mockedClient.setNotificationHandler).toHaveBeenCalledOnce();
            expect(resourceListHandler).toBeDefined();
            await resourceListHandler?.({
                method: 'notifications/resources/list_changed',
            });
            expect(resourceRegistry.setResourcesForServer).toHaveBeenLastCalledWith('test-server', [expect.objectContaining({ uri: 'file:///tmp/two.txt' })]);
            expect(coreEvents.emitFeedback).toHaveBeenCalledWith('info', 'Resources updated for server: test-server');
        });
        it('should remove tools and prompts on disconnect', async () => {
            const mockedClient = {
                connect: vi.fn(),
                close: vi.fn(),
                getStatus: vi.fn(),
                registerCapabilities: vi.fn(),
                setRequestHandler: vi.fn(),
                setNotificationHandler: vi.fn(),
                getServerCapabilities: vi
                    .fn()
                    .mockReturnValue({ tools: {}, prompts: {} }),
                listPrompts: vi.fn().mockResolvedValue({
                    prompts: [{ id: 'prompt1', text: 'a prompt' }],
                }),
                request: vi.fn().mockResolvedValue({}),
                listTools: vi.fn().mockResolvedValue({
                    tools: [
                        {
                            name: 'testTool',
                            description: 'A test tool',
                            inputSchema: { type: 'object', properties: {} },
                        },
                    ],
                }),
            };
            vi.mocked(ClientLib.Client).mockReturnValue(mockedClient);
            vi.spyOn(SdkClientStdioLib, 'StdioClientTransport').mockReturnValue({});
            const mockedToolRegistry = {
                registerTool: vi.fn(),
                unregisterTool: vi.fn(),
                getMessageBus: vi.fn().mockReturnValue(undefined),
                removeMcpToolsByServer: vi.fn(),
                sortTools: vi.fn(),
            };
            const mockedPromptRegistry = {
                registerPrompt: vi.fn(),
                unregisterPrompt: vi.fn(),
                removePromptsByServer: vi.fn(),
            };
            const resourceRegistry = {
                setResourcesForServer: vi.fn(),
                removeResourcesByServer: vi.fn(),
            };
            const client = new McpClient('test-server', {
                command: 'test-command',
            }, mockedToolRegistry, mockedPromptRegistry, resourceRegistry, workspaceContext, {}, false);
            await client.connect();
            await client.discover({});
            expect(mockedToolRegistry.registerTool).toHaveBeenCalledOnce();
            expect(mockedPromptRegistry.registerPrompt).toHaveBeenCalledOnce();
            await client.disconnect();
            expect(mockedClient.close).toHaveBeenCalledOnce();
            expect(mockedToolRegistry.removeMcpToolsByServer).toHaveBeenCalledOnce();
            expect(mockedPromptRegistry.removePromptsByServer).toHaveBeenCalledOnce();
            expect(resourceRegistry.removeResourcesByServer).toHaveBeenCalledOnce();
        });
    });
    describe('Dynamic Tool Updates', () => {
        it('should set up notification handler if server supports tool list changes', async () => {
            const mockedClient = {
                connect: vi.fn(),
                getStatus: vi.fn(),
                registerCapabilities: vi.fn(),
                setRequestHandler: vi.fn(),
                // Capability enables the listener
                getServerCapabilities: vi
                    .fn()
                    .mockReturnValue({ tools: { listChanged: true } }),
                setNotificationHandler: vi.fn(),
                listTools: vi.fn().mockResolvedValue({ tools: [] }),
                listPrompts: vi.fn().mockResolvedValue({ prompts: [] }),
                request: vi.fn().mockResolvedValue({}),
            };
            vi.mocked(ClientLib.Client).mockReturnValue(mockedClient);
            vi.spyOn(SdkClientStdioLib, 'StdioClientTransport').mockReturnValue({});
            const client = new McpClient('test-server', { command: 'test-command' }, {}, {}, {}, workspaceContext, {}, false);
            await client.connect();
            expect(mockedClient.setNotificationHandler).toHaveBeenCalledWith(ToolListChangedNotificationSchema, expect.any(Function));
        });
        it('should NOT set up notification handler if server lacks capability', async () => {
            const mockedClient = {
                connect: vi.fn(),
                getServerCapabilities: vi.fn().mockReturnValue({ tools: {} }), // No listChanged
                setNotificationHandler: vi.fn(),
                request: vi.fn().mockResolvedValue({}),
                registerCapabilities: vi.fn().mockResolvedValue({}),
                setRequestHandler: vi.fn().mockResolvedValue({}),
            };
            vi.mocked(ClientLib.Client).mockReturnValue(mockedClient);
            vi.spyOn(SdkClientStdioLib, 'StdioClientTransport').mockReturnValue({});
            const client = new McpClient('test-server', { command: 'test-command' }, {}, {}, {}, workspaceContext, {}, false);
            await client.connect();
            expect(mockedClient.setNotificationHandler).not.toHaveBeenCalled();
        });
        it('should refresh tools and notify manager when notification is received', async () => {
            // Setup mocks
            const mockedClient = {
                connect: vi.fn(),
                getServerCapabilities: vi
                    .fn()
                    .mockReturnValue({ tools: { listChanged: true } }),
                setNotificationHandler: vi.fn(),
                listTools: vi.fn().mockResolvedValue({
                    tools: [
                        {
                            name: 'newTool',
                            inputSchema: { type: 'object', properties: {} },
                        },
                    ],
                }),
                listPrompts: vi.fn().mockResolvedValue({ prompts: [] }),
                request: vi.fn().mockResolvedValue({}),
                registerCapabilities: vi.fn().mockResolvedValue({}),
                setRequestHandler: vi.fn().mockResolvedValue({}),
            };
            vi.mocked(ClientLib.Client).mockReturnValue(mockedClient);
            vi.spyOn(SdkClientStdioLib, 'StdioClientTransport').mockReturnValue({});
            const mockedToolRegistry = {
                removeMcpToolsByServer: vi.fn(),
                registerTool: vi.fn(),
                sortTools: vi.fn(),
                getMessageBus: vi.fn().mockReturnValue(undefined),
            };
            const onToolsUpdatedSpy = vi.fn().mockResolvedValue(undefined);
            // Initialize client with onToolsUpdated callback
            const client = new McpClient('test-server', { command: 'test-command' }, mockedToolRegistry, {}, {}, workspaceContext, {}, false, onToolsUpdatedSpy);
            // 1. Connect (sets up listener)
            await client.connect();
            // 2. Extract the callback passed to setNotificationHandler
            const notificationCallback = mockedClient.setNotificationHandler.mock.calls[0][1];
            // 3. Trigger the notification manually
            await notificationCallback();
            // 4. Assertions
            // It should clear old tools
            expect(mockedToolRegistry.removeMcpToolsByServer).toHaveBeenCalledWith('test-server');
            // It should fetch new tools (listTools called inside discoverTools)
            expect(mockedClient.listTools).toHaveBeenCalled();
            // It should register the new tool
            expect(mockedToolRegistry.registerTool).toHaveBeenCalled();
            // It should notify the manager
            expect(onToolsUpdatedSpy).toHaveBeenCalled();
            // It should emit feedback event
            expect(coreEvents.emitFeedback).toHaveBeenCalledWith('info', 'Tools updated for server: test-server');
        });
        it('should handle errors during tool refresh gracefully', async () => {
            const mockedClient = {
                connect: vi.fn(),
                getServerCapabilities: vi
                    .fn()
                    .mockReturnValue({ tools: { listChanged: true } }),
                setNotificationHandler: vi.fn(),
                // Simulate error during discovery
                listTools: vi.fn().mockRejectedValue(new Error('Network blip')),
                request: vi.fn().mockResolvedValue({}),
                registerCapabilities: vi.fn().mockResolvedValue({}),
                setRequestHandler: vi.fn().mockResolvedValue({}),
            };
            vi.mocked(ClientLib.Client).mockReturnValue(mockedClient);
            vi.spyOn(SdkClientStdioLib, 'StdioClientTransport').mockReturnValue({});
            const mockedToolRegistry = {
                removeMcpToolsByServer: vi.fn(),
                getMessageBus: vi.fn().mockReturnValue(undefined),
            };
            const client = new McpClient('test-server', { command: 'test-command' }, mockedToolRegistry, {}, {}, workspaceContext, {}, false);
            await client.connect();
            const notificationCallback = mockedClient.setNotificationHandler.mock.calls[0][1];
            // Trigger notification - should fail internally but catch the error
            await notificationCallback();
            // Should try to remove tools
            expect(mockedToolRegistry.removeMcpToolsByServer).toHaveBeenCalled();
            // Should NOT emit success feedback
            expect(coreEvents.emitFeedback).not.toHaveBeenCalledWith('info', expect.stringContaining('Tools updated'));
        });
        it('should handle concurrent updates from multiple servers', async () => {
            const createMockSdkClient = (toolName) => ({
                connect: vi.fn(),
                getServerCapabilities: vi
                    .fn()
                    .mockReturnValue({ tools: { listChanged: true } }),
                setNotificationHandler: vi.fn(),
                listTools: vi.fn().mockResolvedValue({
                    tools: [
                        {
                            name: toolName,
                            inputSchema: { type: 'object', properties: {} },
                        },
                    ],
                }),
                listPrompts: vi.fn().mockResolvedValue({ prompts: [] }),
                request: vi.fn().mockResolvedValue({}),
                registerCapabilities: vi.fn().mockResolvedValue({}),
                setRequestHandler: vi.fn().mockResolvedValue({}),
            });
            const mockClientA = createMockSdkClient('tool-from-A');
            const mockClientB = createMockSdkClient('tool-from-B');
            vi.mocked(ClientLib.Client)
                .mockReturnValueOnce(mockClientA)
                .mockReturnValueOnce(mockClientB);
            vi.spyOn(SdkClientStdioLib, 'StdioClientTransport').mockReturnValue({});
            const mockedToolRegistry = {
                removeMcpToolsByServer: vi.fn(),
                registerTool: vi.fn(),
                sortTools: vi.fn(),
                getMessageBus: vi.fn().mockReturnValue(undefined),
            };
            const onToolsUpdatedSpy = vi.fn().mockResolvedValue(undefined);
            const clientA = new McpClient('server-A', { command: 'cmd-a' }, mockedToolRegistry, {}, {}, workspaceContext, {}, false, onToolsUpdatedSpy);
            const clientB = new McpClient('server-B', { command: 'cmd-b' }, mockedToolRegistry, {}, {}, workspaceContext, {}, false, onToolsUpdatedSpy);
            await clientA.connect();
            await clientB.connect();
            const handlerA = mockClientA.setNotificationHandler.mock.calls[0][1];
            const handlerB = mockClientB.setNotificationHandler.mock.calls[0][1];
            // Trigger burst updates simultaneously
            await Promise.all([handlerA(), handlerB()]);
            expect(mockedToolRegistry.removeMcpToolsByServer).toHaveBeenCalledWith('server-A');
            expect(mockedToolRegistry.removeMcpToolsByServer).toHaveBeenCalledWith('server-B');
            // Verify fetching happened on both clients
            expect(mockClientA.listTools).toHaveBeenCalled();
            expect(mockClientB.listTools).toHaveBeenCalled();
            // Verify tools from both servers were registered (2 total calls)
            expect(mockedToolRegistry.registerTool).toHaveBeenCalledTimes(2);
            // Verify the update callback was triggered for both
            expect(onToolsUpdatedSpy).toHaveBeenCalledTimes(2);
        });
        it('should abort discovery and log error if timeout is exceeded during refresh', async () => {
            vi.useFakeTimers();
            const mockedClient = {
                connect: vi.fn(),
                getServerCapabilities: vi
                    .fn()
                    .mockReturnValue({ tools: { listChanged: true } }),
                setNotificationHandler: vi.fn(),
                // Mock listTools to simulate a long running process that respects the abort signal
                listTools: vi.fn().mockImplementation(async (params, options) => new Promise((resolve, reject) => {
                    if (options?.signal?.aborted) {
                        return reject(new Error('Operation aborted'));
                    }
                    options?.signal?.addEventListener('abort', () => {
                        reject(new Error('Operation aborted'));
                    });
                    // Intentionally do not resolve immediately to simulate lag
                })),
                listPrompts: vi.fn().mockResolvedValue({ prompts: [] }),
                request: vi.fn().mockResolvedValue({}),
                registerCapabilities: vi.fn().mockResolvedValue({}),
                setRequestHandler: vi.fn().mockResolvedValue({}),
            };
            vi.mocked(ClientLib.Client).mockReturnValue(mockedClient);
            vi.spyOn(SdkClientStdioLib, 'StdioClientTransport').mockReturnValue({});
            const mockedToolRegistry = {
                removeMcpToolsByServer: vi.fn(),
                registerTool: vi.fn(),
                sortTools: vi.fn(),
                getMessageBus: vi.fn().mockReturnValue(undefined),
            };
            const client = new McpClient('test-server', 
            // Set a short timeout
            { command: 'test-command', timeout: 100 }, mockedToolRegistry, {}, {}, workspaceContext, {}, false);
            await client.connect();
            const notificationCallback = mockedClient.setNotificationHandler.mock.calls[0][1];
            const refreshPromise = notificationCallback();
            vi.advanceTimersByTime(150);
            await refreshPromise;
            expect(mockedClient.listTools).toHaveBeenCalledWith(expect.anything(), expect.objectContaining({
                signal: expect.any(AbortSignal),
            }));
            expect(mockedToolRegistry.registerTool).not.toHaveBeenCalled();
            vi.useRealTimers();
        });
        it('should pass abort signal to onToolsUpdated callback', async () => {
            const mockedClient = {
                connect: vi.fn(),
                getServerCapabilities: vi
                    .fn()
                    .mockReturnValue({ tools: { listChanged: true } }),
                setNotificationHandler: vi.fn(),
                listTools: vi.fn().mockResolvedValue({ tools: [] }),
                listPrompts: vi.fn().mockResolvedValue({ prompts: [] }),
                request: vi.fn().mockResolvedValue({}),
                registerCapabilities: vi.fn().mockResolvedValue({}),
                setRequestHandler: vi.fn().mockResolvedValue({}),
            };
            vi.mocked(ClientLib.Client).mockReturnValue(mockedClient);
            vi.spyOn(SdkClientStdioLib, 'StdioClientTransport').mockReturnValue({});
            const mockedToolRegistry = {
                removeMcpToolsByServer: vi.fn(),
                registerTool: vi.fn(),
                sortTools: vi.fn(),
                getMessageBus: vi.fn().mockReturnValue(undefined),
            };
            const onToolsUpdatedSpy = vi.fn().mockResolvedValue(undefined);
            const client = new McpClient('test-server', { command: 'test-command' }, mockedToolRegistry, {}, {}, workspaceContext, {}, false, onToolsUpdatedSpy);
            await client.connect();
            const notificationCallback = mockedClient.setNotificationHandler.mock.calls[0][1];
            await notificationCallback();
            expect(onToolsUpdatedSpy).toHaveBeenCalledWith(expect.any(AbortSignal));
            // Verify the signal passed was not aborted (happy path)
            const signal = onToolsUpdatedSpy.mock.calls[0][0];
            expect(signal.aborted).toBe(false);
        });
    });
    describe('appendMcpServerCommand', () => {
        it('should do nothing if no MCP servers or command are configured', () => {
            const out = populateMcpServerCommand({}, undefined);
            expect(out).toEqual({});
        });
        it('should discover tools via mcpServerCommand', () => {
            const commandString = 'command --arg1 value1';
            const out = populateMcpServerCommand({}, commandString);
            expect(out).toEqual({
                mcp: {
                    command: 'command',
                    args: ['--arg1', 'value1'],
                },
            });
        });
        it('should handle error if mcpServerCommand parsing fails', () => {
            expect(() => populateMcpServerCommand({}, 'derp && herp')).toThrowError();
        });
    });
    describe('createTransport', () => {
        describe('should connect via httpUrl', () => {
            it('without headers', async () => {
                const transport = await createTransport('test-server', {
                    httpUrl: 'http://test-server',
                }, false);
                expect(transport).toBeInstanceOf(StreamableHTTPClientTransport);
                expect(transport).toMatchObject({
                    _url: new URL('http://test-server'),
                    _requestInit: { headers: {} },
                });
            });
            it('with headers', async () => {
                const transport = await createTransport('test-server', {
                    httpUrl: 'http://test-server',
                    headers: { Authorization: 'derp' },
                }, false);
                expect(transport).toBeInstanceOf(StreamableHTTPClientTransport);
                expect(transport).toMatchObject({
                    _url: new URL('http://test-server'),
                    _requestInit: {
                        headers: { Authorization: 'derp' },
                    },
                });
            });
        });
        describe('should connect via url', () => {
            it('without headers', async () => {
                const transport = await createTransport('test-server', {
                    url: 'http://test-server',
                }, false);
                expect(transport).toBeInstanceOf(StreamableHTTPClientTransport);
                expect(transport).toMatchObject({
                    _url: new URL('http://test-server'),
                    _requestInit: { headers: {} },
                });
            });
            it('with headers', async () => {
                const transport = await createTransport('test-server', {
                    url: 'http://test-server',
                    headers: { Authorization: 'derp' },
                }, false);
                expect(transport).toBeInstanceOf(StreamableHTTPClientTransport);
                expect(transport).toMatchObject({
                    _url: new URL('http://test-server'),
                    _requestInit: {
                        headers: { Authorization: 'derp' },
                    },
                });
            });
            it('with type="http" creates StreamableHTTPClientTransport', async () => {
                const transport = await createTransport('test-server', {
                    url: 'http://test-server',
                    type: 'http',
                }, false);
                expect(transport).toBeInstanceOf(StreamableHTTPClientTransport);
                expect(transport).toMatchObject({
                    _url: new URL('http://test-server'),
                    _requestInit: { headers: {} },
                });
            });
            it('with type="sse" creates SSEClientTransport', async () => {
                const transport = await createTransport('test-server', {
                    url: 'http://test-server',
                    type: 'sse',
                }, false);
                expect(transport).toBeInstanceOf(SSEClientTransport);
                expect(transport).toMatchObject({
                    _url: new URL('http://test-server'),
                    _requestInit: { headers: {} },
                });
            });
            it('without type defaults to StreamableHTTPClientTransport', async () => {
                const transport = await createTransport('test-server', {
                    url: 'http://test-server',
                }, false);
                expect(transport).toBeInstanceOf(StreamableHTTPClientTransport);
                expect(transport).toMatchObject({
                    _url: new URL('http://test-server'),
                    _requestInit: { headers: {} },
                });
            });
            it('with type="http" and headers applies headers correctly', async () => {
                const transport = await createTransport('test-server', {
                    url: 'http://test-server',
                    type: 'http',
                    headers: { Authorization: 'Bearer token' },
                }, false);
                expect(transport).toBeInstanceOf(StreamableHTTPClientTransport);
                expect(transport).toMatchObject({
                    _url: new URL('http://test-server'),
                    _requestInit: {
                        headers: { Authorization: 'Bearer token' },
                    },
                });
            });
            it('with type="sse" and headers applies headers correctly', async () => {
                const transport = await createTransport('test-server', {
                    url: 'http://test-server',
                    type: 'sse',
                    headers: { 'X-API-Key': 'key123' },
                }, false);
                expect(transport).toBeInstanceOf(SSEClientTransport);
                expect(transport).toMatchObject({
                    _url: new URL('http://test-server'),
                    _requestInit: {
                        headers: { 'X-API-Key': 'key123' },
                    },
                });
            });
            it('httpUrl takes priority over url when both are present', async () => {
                const transport = await createTransport('test-server', {
                    httpUrl: 'http://test-server-http',
                    url: 'http://test-server-url',
                }, false);
                // httpUrl should take priority and create HTTP transport
                expect(transport).toBeInstanceOf(StreamableHTTPClientTransport);
                expect(transport).toMatchObject({
                    _url: new URL('http://test-server-http'),
                    _requestInit: { headers: {} },
                });
            });
        });
        it('should connect via command', async () => {
            const mockedTransport = vi
                .spyOn(SdkClientStdioLib, 'StdioClientTransport')
                .mockReturnValue({});
            await createTransport('test-server', {
                command: 'test-command',
                args: ['--foo', 'bar'],
                env: { FOO: 'bar' },
                cwd: 'test/cwd',
            }, false);
            expect(mockedTransport).toHaveBeenCalledWith({
                command: 'test-command',
                args: ['--foo', 'bar'],
                cwd: 'test/cwd',
                env: { ...process.env, FOO: 'bar' },
                stderr: 'pipe',
            });
        });
        describe('useGoogleCredentialProvider', () => {
            beforeEach(() => {
                // Mock GoogleAuth client
                const mockClient = {
                    getAccessToken: vi.fn().mockResolvedValue({ token: 'test-token' }),
                    quotaProjectId: 'myproject',
                };
                GoogleAuth.prototype.getClient = vi.fn().mockResolvedValue(mockClient);
            });
            it('should use GoogleCredentialProvider when specified', async () => {
                const transport = await createTransport('test-server', {
                    httpUrl: 'http://test.googleapis.com',
                    authProviderType: AuthProviderType.GOOGLE_CREDENTIALS,
                    oauth: {
                        scopes: ['scope1'],
                    },
                    headers: {
                        'X-Goog-User-Project': 'myproject',
                    },
                }, false);
                expect(transport).toBeInstanceOf(StreamableHTTPClientTransport);
                // eslint-disable-next-line @typescript-eslint/no-explicit-any
                const authProvider = transport._authProvider;
                expect(authProvider).toBeInstanceOf(GoogleCredentialProvider);
                // eslint-disable-next-line @typescript-eslint/no-explicit-any
                const googUserProject = transport._requestInit?.headers?.['X-Goog-User-Project'];
                expect(googUserProject).toBe('myproject');
            });
            it('should use headers from GoogleCredentialProvider', async () => {
                const mockGetRequestHeaders = vi.fn().mockResolvedValue({
                    'X-Goog-User-Project': 'provider-project',
                });
                vi.spyOn(GoogleCredentialProvider.prototype, 'getRequestHeaders').mockImplementation(mockGetRequestHeaders);
                const transport = await createTransport('test-server', {
                    httpUrl: 'http://test.googleapis.com',
                    authProviderType: AuthProviderType.GOOGLE_CREDENTIALS,
                    oauth: {
                        scopes: ['scope1'],
                    },
                }, false);
                expect(transport).toBeInstanceOf(StreamableHTTPClientTransport);
                expect(mockGetRequestHeaders).toHaveBeenCalled();
                // eslint-disable-next-line @typescript-eslint/no-explicit-any
                const headers = transport._requestInit?.headers;
                expect(headers['X-Goog-User-Project']).toBe('provider-project');
            });
            it('should prioritize provider headers over config headers', async () => {
                const mockGetRequestHeaders = vi.fn().mockResolvedValue({
                    'X-Goog-User-Project': 'provider-project',
                });
                vi.spyOn(GoogleCredentialProvider.prototype, 'getRequestHeaders').mockImplementation(mockGetRequestHeaders);
                const transport = await createTransport('test-server', {
                    httpUrl: 'http://test.googleapis.com',
                    authProviderType: AuthProviderType.GOOGLE_CREDENTIALS,
                    oauth: {
                        scopes: ['scope1'],
                    },
                    headers: {
                        'X-Goog-User-Project': 'config-project',
                    },
                }, false);
                expect(transport).toBeInstanceOf(StreamableHTTPClientTransport);
                // eslint-disable-next-line @typescript-eslint/no-explicit-any
                const headers = transport._requestInit?.headers;
                expect(headers['X-Goog-User-Project']).toBe('provider-project');
            });
            it('should use GoogleCredentialProvider with SSE transport', async () => {
                const transport = await createTransport('test-server', {
                    url: 'http://test.googleapis.com',
                    type: 'sse',
                    authProviderType: AuthProviderType.GOOGLE_CREDENTIALS,
                    oauth: {
                        scopes: ['scope1'],
                    },
                }, false);
                expect(transport).toBeInstanceOf(SSEClientTransport);
                // eslint-disable-next-line @typescript-eslint/no-explicit-any
                const authProvider = transport._authProvider;
                expect(authProvider).toBeInstanceOf(GoogleCredentialProvider);
            });
            it('should throw an error if no URL is provided with GoogleCredentialProvider', async () => {
                await expect(createTransport('test-server', {
                    authProviderType: AuthProviderType.GOOGLE_CREDENTIALS,
                    oauth: {
                        scopes: ['scope1'],
                    },
                }, false)).rejects.toThrow('URL must be provided in the config for Google Credentials provider');
            });
        });
    });
    describe('isEnabled', () => {
        const funcDecl = { name: 'myTool' };
        const serverName = 'myServer';
        it('should return true if no include or exclude lists are provided', () => {
            const mcpServerConfig = {};
            expect(isEnabled(funcDecl, serverName, mcpServerConfig)).toBe(true);
        });
        it('should return false if the tool is in the exclude list', () => {
            const mcpServerConfig = { excludeTools: ['myTool'] };
            expect(isEnabled(funcDecl, serverName, mcpServerConfig)).toBe(false);
        });
        it('should return true if the tool is in the include list', () => {
            const mcpServerConfig = { includeTools: ['myTool'] };
            expect(isEnabled(funcDecl, serverName, mcpServerConfig)).toBe(true);
        });
        it('should return true if the tool is in the include list with parentheses', () => {
            const mcpServerConfig = { includeTools: ['myTool()'] };
            expect(isEnabled(funcDecl, serverName, mcpServerConfig)).toBe(true);
        });
        it('should return false if the include list exists but does not contain the tool', () => {
            const mcpServerConfig = { includeTools: ['anotherTool'] };
            expect(isEnabled(funcDecl, serverName, mcpServerConfig)).toBe(false);
        });
        it('should return false if the tool is in both the include and exclude lists', () => {
            const mcpServerConfig = {
                includeTools: ['myTool'],
                excludeTools: ['myTool'],
            };
            expect(isEnabled(funcDecl, serverName, mcpServerConfig)).toBe(false);
        });
        it('should return false if the function declaration has no name', () => {
            const namelessFuncDecl = {};
            const mcpServerConfig = {};
            expect(isEnabled(namelessFuncDecl, serverName, mcpServerConfig)).toBe(false);
        });
    });
    describe('hasNetworkTransport', () => {
        it('should return true if only url is provided', () => {
            const config = { url: 'http://example.com' };
            expect(hasNetworkTransport(config)).toBe(true);
        });
        it('should return true if only httpUrl is provided', () => {
            const config = { httpUrl: 'http://example.com' };
            expect(hasNetworkTransport(config)).toBe(true);
        });
        it('should return true if both url and httpUrl are provided', () => {
            const config = {
                url: 'http://example.com/sse',
                httpUrl: 'http://example.com/http',
            };
            expect(hasNetworkTransport(config)).toBe(true);
        });
        it('should return false if neither url nor httpUrl is provided', () => {
            const config = { command: 'do-something' };
            expect(hasNetworkTransport(config)).toBe(false);
        });
        it('should return false for an empty config object', () => {
            const config = {};
            expect(hasNetworkTransport(config)).toBe(false);
        });
    });
});
describe('connectToMcpServer with OAuth', () => {
    let mockedClient;
    let workspaceContext;
    let testWorkspace;
    let mockAuthProvider;
    let mockTokenStorage;
    beforeEach(() => {
        mockedClient = {
            connect: vi.fn(),
            close: vi.fn(),
            registerCapabilities: vi.fn(),
            setRequestHandler: vi.fn(),
            onclose: vi.fn(),
            notification: vi.fn(),
        };
        vi.mocked(ClientLib.Client).mockImplementation(() => mockedClient);
        testWorkspace = fs.mkdtempSync(path.join(os.tmpdir(), 'gemini-agent-test-'));
        workspaceContext = new WorkspaceContext(testWorkspace);
        vi.spyOn(console, 'log').mockImplementation(() => { });
        vi.spyOn(console, 'warn').mockImplementation(() => { });
        vi.spyOn(console, 'error').mockImplementation(() => { });
        mockTokenStorage = {
            getCredentials: vi.fn().mockResolvedValue({ clientId: 'test-client' }),
        };
        vi.mocked(MCPOAuthTokenStorage).mockReturnValue(mockTokenStorage);
        mockAuthProvider = {
            authenticate: vi.fn().mockResolvedValue(undefined),
            getValidToken: vi.fn().mockResolvedValue('test-access-token'),
            tokenStorage: mockTokenStorage,
        };
        vi.mocked(MCPOAuthProvider).mockReturnValue(mockAuthProvider);
    });
    afterEach(() => {
        vi.clearAllMocks();
    });
    it('should handle automatic OAuth flow on 401 with www-authenticate header', async () => {
        const serverUrl = 'http://test-server.com/';
        const authUrl = 'http://auth.example.com/auth';
        const tokenUrl = 'http://auth.example.com/token';
        const wwwAuthHeader = `Bearer realm="test", resource_metadata="http://test-server.com/.well-known/oauth-protected-resource"`;
        vi.mocked(mockedClient.connect).mockRejectedValueOnce(new StreamableHTTPError(401, `Unauthorized\nwww-authenticate: ${wwwAuthHeader}`));
        vi.mocked(OAuthUtils.discoverOAuthConfig).mockResolvedValue({
            authorizationUrl: authUrl,
            tokenUrl,
            scopes: ['test-scope'],
        });
        // We need this to be an any type because we dig into its private state.
        // eslint-disable-next-line @typescript-eslint/no-explicit-any
        let capturedTransport;
        vi.mocked(mockedClient.connect).mockImplementationOnce(async (transport) => {
            capturedTransport = transport;
            return Promise.resolve();
        });
        const client = await connectToMcpServer('test-server', { httpUrl: serverUrl, oauth: { enabled: true } }, false, workspaceContext);
        expect(client).toBe(mockedClient);
        expect(mockedClient.connect).toHaveBeenCalledTimes(2);
        expect(mockAuthProvider.authenticate).toHaveBeenCalledOnce();
        const authHeader = capturedTransport._requestInit?.headers?.['Authorization'];
        expect(authHeader).toBe('Bearer test-access-token');
    });
    it('should discover oauth config if not in www-authenticate header', async () => {
        const serverUrl = 'http://test-server.com';
        const authUrl = 'http://auth.example.com/auth';
        const tokenUrl = 'http://auth.example.com/token';
        vi.mocked(mockedClient.connect).mockRejectedValueOnce(new StreamableHTTPError(401, 'Unauthorized'));
        vi.mocked(OAuthUtils.discoverOAuthConfig).mockResolvedValue({
            authorizationUrl: authUrl,
            tokenUrl,
            scopes: ['test-scope'],
        });
        vi.mocked(mockAuthProvider.getValidToken).mockResolvedValue('test-access-token-from-discovery');
        // We need this to be an any type because we dig into its private state.
        // eslint-disable-next-line @typescript-eslint/no-explicit-any
        let capturedTransport;
        vi.mocked(mockedClient.connect).mockImplementationOnce(async (transport) => {
            capturedTransport = transport;
            return Promise.resolve();
        });
        const client = await connectToMcpServer('test-server', { httpUrl: serverUrl, oauth: { enabled: true } }, false, workspaceContext);
        expect(client).toBe(mockedClient);
        expect(mockedClient.connect).toHaveBeenCalledTimes(2);
        expect(mockAuthProvider.authenticate).toHaveBeenCalledOnce();
        expect(OAuthUtils.discoverOAuthConfig).toHaveBeenCalledWith(serverUrl);
        const authHeader = capturedTransport._requestInit?.headers?.['Authorization'];
        expect(authHeader).toBe('Bearer test-access-token-from-discovery');
    });
});
describe('connectToMcpServer - HTTP→SSE fallback', () => {
    let mockedClient;
    let workspaceContext;
    let testWorkspace;
    beforeEach(() => {
        mockedClient = {
            connect: vi.fn(),
            close: vi.fn(),
            registerCapabilities: vi.fn(),
            setRequestHandler: vi.fn(),
            onclose: vi.fn(),
            notification: vi.fn(),
        };
        vi.mocked(ClientLib.Client).mockImplementation(() => mockedClient);
        testWorkspace = fs.mkdtempSync(path.join(os.tmpdir(), 'gemini-agent-test-'));
        workspaceContext = new WorkspaceContext(testWorkspace);
        vi.spyOn(console, 'log').mockImplementation(() => { });
        vi.spyOn(console, 'warn').mockImplementation(() => { });
        vi.spyOn(console, 'error').mockImplementation(() => { });
    });
    afterEach(() => {
        vi.clearAllMocks();
    });
    it('should NOT trigger fallback when type="http" is explicit', async () => {
        vi.mocked(mockedClient.connect).mockRejectedValueOnce(new Error('Connection failed'));
        await expect(connectToMcpServer('test-server', { url: 'http://test-server', type: 'http' }, false, workspaceContext)).rejects.toThrow('Connection failed');
        // Should only try once (no fallback)
        expect(mockedClient.connect).toHaveBeenCalledTimes(1);
    });
    it('should NOT trigger fallback when type="sse" is explicit', async () => {
        vi.mocked(mockedClient.connect).mockRejectedValueOnce(new Error('Connection failed'));
        await expect(connectToMcpServer('test-server', { url: 'http://test-server', type: 'sse' }, false, workspaceContext)).rejects.toThrow('Connection failed');
        // Should only try once (no fallback)
        expect(mockedClient.connect).toHaveBeenCalledTimes(1);
    });
    it('should trigger fallback when url provided without type and HTTP fails', async () => {
        vi.mocked(mockedClient.connect)
            .mockRejectedValueOnce(new StreamableHTTPError(500, 'Server error'))
            .mockResolvedValueOnce(undefined);
        const client = await connectToMcpServer('test-server', { url: 'http://test-server' }, false, workspaceContext);
        expect(client).toBe(mockedClient);
        // First HTTP attempt fails, second SSE attempt succeeds
        expect(mockedClient.connect).toHaveBeenCalledTimes(2);
    });
    it('should throw original HTTP error when both HTTP and SSE fail (non-401)', async () => {
        const httpError = new StreamableHTTPError(500, 'Server error');
        const sseError = new Error('SSE connection failed');
        vi.mocked(mockedClient.connect)
            .mockRejectedValueOnce(httpError)
            .mockRejectedValueOnce(sseError);
        await expect(connectToMcpServer('test-server', { url: 'http://test-server' }, false, workspaceContext)).rejects.toThrow('Server error');
        expect(mockedClient.connect).toHaveBeenCalledTimes(2);
    });
    it('should handle HTTP 404 followed by SSE success', async () => {
        vi.mocked(mockedClient.connect)
            .mockRejectedValueOnce(new StreamableHTTPError(404, 'Not Found'))
            .mockResolvedValueOnce(undefined);
        const client = await connectToMcpServer('test-server', { url: 'http://test-server' }, false, workspaceContext);
        expect(client).toBe(mockedClient);
        expect(mockedClient.connect).toHaveBeenCalledTimes(2);
    });
});
describe('connectToMcpServer - OAuth with transport fallback', () => {
    let mockedClient;
    let workspaceContext;
    let testWorkspace;
    let mockAuthProvider;
    let mockTokenStorage;
    beforeEach(() => {
        mockedClient = {
            connect: vi.fn(),
            close: vi.fn(),
            registerCapabilities: vi.fn(),
            setRequestHandler: vi.fn(),
            onclose: vi.fn(),
            notification: vi.fn(),
        };
        vi.mocked(ClientLib.Client).mockImplementation(() => mockedClient);
        testWorkspace = fs.mkdtempSync(path.join(os.tmpdir(), 'gemini-agent-test-'));
        workspaceContext = new WorkspaceContext(testWorkspace);
        vi.spyOn(console, 'log').mockImplementation(() => { });
        vi.spyOn(console, 'warn').mockImplementation(() => { });
        vi.spyOn(console, 'error').mockImplementation(() => { });
        mockTokenStorage = {
            getCredentials: vi.fn().mockResolvedValue({ clientId: 'test-client' }),
        };
        vi.mocked(MCPOAuthTokenStorage).mockReturnValue(mockTokenStorage);
        mockAuthProvider = {
            authenticate: vi.fn().mockResolvedValue(undefined),
            getValidToken: vi.fn().mockResolvedValue('test-access-token'),
            tokenStorage: mockTokenStorage,
        };
        vi.mocked(MCPOAuthProvider).mockReturnValue(mockAuthProvider);
        vi.mocked(OAuthUtils.discoverOAuthConfig).mockResolvedValue({
            authorizationUrl: 'http://auth.example.com/auth',
            tokenUrl: 'http://auth.example.com/token',
            scopes: ['test-scope'],
        });
    });
    afterEach(() => {
        vi.clearAllMocks();
    });
    it('should handle HTTP 404 → SSE 401 → OAuth → SSE+OAuth succeeds', async () => {
        // Tests that OAuth flow works when SSE (not HTTP) requires auth
        vi.mocked(mockedClient.connect)
            .mockRejectedValueOnce(new StreamableHTTPError(404, 'Not Found'))
            .mockRejectedValueOnce(new StreamableHTTPError(401, 'Unauthorized'))
            .mockResolvedValueOnce(undefined);
        const client = await connectToMcpServer('test-server', { url: 'http://test-server', oauth: { enabled: true } }, false, workspaceContext);
        expect(client).toBe(mockedClient);
        expect(mockedClient.connect).toHaveBeenCalledTimes(3);
        expect(mockAuthProvider.authenticate).toHaveBeenCalledOnce();
    });
});
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