/**
 * @license
 * Copyright 2025 Qwen Team
 * SPDX-License-Identifier: Apache-2.0
 */

import {
  describe,
  it,
  expect,
  vi,
  beforeEach,
  afterEach,
  afterAll,
  type MockInstance,
} from 'vitest';

// Mock cleanup module before importing anything else
const { mockRunExitCleanup } = vi.hoisted(() => ({
  mockRunExitCleanup: vi.fn().mockResolvedValue(undefined),
}));
vi.mock('../utils/cleanup.js', () => ({
  runExitCleanup: mockRunExitCleanup,
}));

// Mock the ACP SDK
const { mockConnectionState } = vi.hoisted(() => {
  const state = {
    resolve: () => {},
    promise: null as unknown as Promise<void>,
    reset() {
      state.promise = new Promise<void>((r) => {
        state.resolve = r;
      });
    },
  };
  state.reset();
  return { mockConnectionState: state };
});

vi.mock('@agentclientprotocol/sdk', () => ({
  AgentSideConnection: vi.fn().mockImplementation(() => ({
    get closed() {
      return mockConnectionState.promise;
    },
  })),
  ndJsonStream: vi.fn().mockReturnValue({}),
  RequestError: class RequestError extends Error {
    static authRequired = vi
      .fn()
      .mockImplementation((data: unknown, msg: string) => {
        const err = new Error(msg);
        Object.assign(err, data);
        return err;
      });
    static invalidParams = vi
      .fn()
      .mockImplementation((data: unknown, msg: string) => {
        const err = new Error(msg);
        Object.assign(err, data);
        return err;
      });
  },
  PROTOCOL_VERSION: '1.0.0',
}));

// Mock stream conversion
vi.mock('node:stream', async (importOriginal) => {
  const actual = await importOriginal<typeof import('node:stream')>();
  return {
    ...actual,
    Writable: { ...actual.Writable, toWeb: vi.fn().mockReturnValue({}) },
    Readable: { ...actual.Readable, toWeb: vi.fn().mockReturnValue({}) },
  };
});

// Mock core dependencies
vi.mock('@qwen-code/qwen-code-core', () => ({
  createDebugLogger: () => ({
    debug: vi.fn(),
    error: vi.fn(),
    warn: vi.fn(),
    info: vi.fn(),
  }),
  APPROVAL_MODE_INFO: {},
  APPROVAL_MODES: [],
  AuthType: {},
  clearCachedCredentialFile: vi.fn(),
  QwenOAuth2Event: {},
  qwenOAuth2Events: { on: vi.fn(), off: vi.fn() },
  MCPServerConfig: vi.fn().mockImplementation((...args: unknown[]) => ({
    _args: args,
  })),
  SessionService: vi.fn(),
  tokenLimit: vi.fn(),
  SessionStartSource: {
    Startup: 'startup',
    Resume: 'resume',
  },
  SessionEndReason: {
    PromptInputExit: 'prompt_input_exit',
    Other: 'other',
  },
}));

vi.mock('./authMethods.js', () => ({ buildAuthMethods: vi.fn() }));
vi.mock('./service/filesystem.js', () => ({
  AcpFileSystemService: vi.fn(),
}));
vi.mock('../config/settings.js', () => ({
  SettingScope: {},
  loadSettings: vi.fn(),
}));
vi.mock('../config/config.js', () => ({ loadCliConfig: vi.fn() }));
vi.mock('./session/Session.js', () => ({ Session: vi.fn() }));
vi.mock('../utils/acpModelUtils.js', () => ({
  formatAcpModelId: vi.fn(),
}));

import {
  runAcpAgent,
  toStdioServer,
  toSseServer,
  toHttpServer,
} from './acpAgent.js';
import type { Config } from '@qwen-code/qwen-code-core';
import type { LoadedSettings } from '../config/settings.js';
import type { CliArgs } from '../config/config.js';
import { SessionEndReason, MCPServerConfig } from '@qwen-code/qwen-code-core';
import type { McpServer } from '@agentclientprotocol/sdk';
import { AgentSideConnection } from '@agentclientprotocol/sdk';
import { loadSettings } from '../config/settings.js';
import { loadCliConfig } from '../config/config.js';
import { Session } from './session/Session.js';

describe('runAcpAgent shutdown cleanup', () => {
  let processExitSpy: MockInstance<typeof process.exit>;
  let processOnSpy: MockInstance<typeof process.on>;
  let processOffSpy: MockInstance<typeof process.off>;
  let stdinDestroySpy: MockInstance<typeof process.stdin.destroy>;
  let stdoutDestroySpy: MockInstance<typeof process.stdout.destroy>;
  let sigTermListeners: NodeJS.SignalsListener[];
  let sigIntListeners: NodeJS.SignalsListener[];
  let mockConfig: Config;

  const mockSettings = { merged: {} } as LoadedSettings;
  const mockArgv = {} as CliArgs;

  beforeEach(() => {
    vi.clearAllMocks();
    // Reset mockConfig after clearAllMocks
    mockConfig = {
      initialize: vi.fn().mockResolvedValue(undefined),
      getHookSystem: vi.fn().mockReturnValue(undefined),
      getDisableAllHooks: vi.fn().mockReturnValue(false),
      hasHooksForEvent: vi.fn().mockReturnValue(false),
      getModel: vi.fn().mockReturnValue('test-model'),
    } as unknown as Config;

    mockRunExitCleanup.mockResolvedValue(undefined);
    mockConnectionState.reset();
    sigTermListeners = [];
    sigIntListeners = [];

    // Intercept signal handler registration
    processOnSpy = vi.spyOn(process, 'on').mockImplementation(((
      event: string,
      listener: (...args: unknown[]) => void,
    ) => {
      if (event === 'SIGTERM')
        sigTermListeners.push(listener as NodeJS.SignalsListener);
      if (event === 'SIGINT')
        sigIntListeners.push(listener as NodeJS.SignalsListener);
      return process;
    }) as typeof process.on);

    processOffSpy = vi.spyOn(process, 'off').mockImplementation(((
      event: string,
      listener: (...args: unknown[]) => void,
    ) => {
      if (event === 'SIGTERM') {
        sigTermListeners = sigTermListeners.filter((l) => l !== listener);
      }
      if (event === 'SIGINT') {
        sigIntListeners = sigIntListeners.filter((l) => l !== listener);
      }
      return process;
    }) as typeof process.off);

    // Mock process.exit to prevent actually exiting
    processExitSpy = vi
      .spyOn(process, 'exit')
      .mockImplementation((() => undefined) as unknown as typeof process.exit);

    // Mock stdin/stdout destroy
    stdinDestroySpy = vi
      .spyOn(process.stdin, 'destroy')
      .mockImplementation(() => process.stdin);
    stdoutDestroySpy = vi
      .spyOn(process.stdout, 'destroy')
      .mockImplementation(() => process.stdout);
  });

  afterEach(() => {
    processExitSpy.mockRestore();
    stdinDestroySpy.mockRestore();
    stdoutDestroySpy.mockRestore();
    vi.clearAllMocks();
  });

  afterAll(() => {
    processOnSpy.mockRestore();
    processOffSpy.mockRestore();
  });

  it('calls runExitCleanup and process.exit on SIGTERM', async () => {
    // Start runAcpAgent (it will await connection.closed)
    const agentPromise = runAcpAgent(mockConfig, mockSettings, mockArgv);

    // Wait for signal handlers to be registered
    await vi.waitFor(() => {
      expect(sigTermListeners.length).toBeGreaterThan(0);
    });

    // Simulate SIGTERM from IDE
    sigTermListeners[0]('SIGTERM');

    // runExitCleanup is async, wait for it
    await vi.waitFor(() => {
      expect(mockRunExitCleanup).toHaveBeenCalledTimes(1);
    });

    await vi.waitFor(() => {
      expect(processExitSpy).toHaveBeenCalledWith(0);
    });

    // Resolve connection.closed so the promise settles
    mockConnectionState.resolve();
    await agentPromise;
  });

  it('calls runExitCleanup and process.exit on SIGINT', async () => {
    const agentPromise = runAcpAgent(mockConfig, mockSettings, mockArgv);

    // Wait for signal handlers to be registered
    await vi.waitFor(() => {
      expect(sigIntListeners.length).toBeGreaterThan(0);
    });

    sigIntListeners[0]('SIGINT');

    await vi.waitFor(() => {
      expect(mockRunExitCleanup).toHaveBeenCalledTimes(1);
    });

    await vi.waitFor(() => {
      expect(processExitSpy).toHaveBeenCalledWith(0);
    });

    mockConnectionState.resolve();
    await agentPromise;
  });

  it('only runs shutdown once even if multiple signals arrive', async () => {
    const agentPromise = runAcpAgent(mockConfig, mockSettings, mockArgv);

    // Wait for signal handlers to be registered
    await vi.waitFor(() => {
      expect(sigTermListeners.length).toBeGreaterThan(0);
    });

    // Send SIGTERM twice
    sigTermListeners[0]('SIGTERM');
    sigTermListeners[0]('SIGTERM');

    await vi.waitFor(() => {
      expect(mockRunExitCleanup).toHaveBeenCalledTimes(1);
    });

    mockConnectionState.resolve();
    await agentPromise;
  });

  it('still exits even if runExitCleanup throws', async () => {
    mockRunExitCleanup.mockRejectedValueOnce(new Error('cleanup failed'));

    const agentPromise = runAcpAgent(mockConfig, mockSettings, mockArgv);

    // Wait for signal handlers to be registered
    await vi.waitFor(() => {
      expect(sigTermListeners.length).toBeGreaterThan(0);
    });

    sigTermListeners[0]('SIGTERM');

    // process.exit should still be called via .finally()
    await vi.waitFor(() => {
      expect(processExitSpy).toHaveBeenCalledWith(0);
    });

    mockConnectionState.resolve();
    await agentPromise;
  });
});

describe('runAcpAgent SessionEnd hooks', () => {
  let processExitSpy: MockInstance<typeof process.exit>;
  let processOnSpy: MockInstance<typeof process.on>;
  let processOffSpy: MockInstance<typeof process.off>;
  let stdinDestroySpy: MockInstance<typeof process.stdin.destroy>;
  let stdoutDestroySpy: MockInstance<typeof process.stdout.destroy>;
  let sigTermListeners: NodeJS.SignalsListener[];
  let sigIntListeners: NodeJS.SignalsListener[];
  let mockConfig: Config;
  let mockHookSystem: {
    fireSessionEndEvent: ReturnType<typeof vi.fn>;
    fireSessionStartEvent: ReturnType<typeof vi.fn>;
  };

  const mockSettings = { merged: {} } as LoadedSettings;
  const mockArgv = {} as CliArgs;

  beforeEach(() => {
    vi.clearAllMocks();
    mockHookSystem = {
      fireSessionEndEvent: vi.fn().mockResolvedValue(undefined),
      fireSessionStartEvent: vi.fn().mockResolvedValue(undefined),
    };
    mockConfig = {
      initialize: vi.fn().mockResolvedValue(undefined),
      getHookSystem: vi.fn().mockReturnValue(mockHookSystem),
      getDisableAllHooks: vi.fn().mockReturnValue(false),
      hasHooksForEvent: vi.fn().mockReturnValue(true),
      getModel: vi.fn().mockReturnValue('test-model'),
    } as unknown as Config;

    mockRunExitCleanup.mockResolvedValue(undefined);
    mockConnectionState.reset();
    sigTermListeners = [];
    sigIntListeners = [];

    processOnSpy = vi.spyOn(process, 'on').mockImplementation(((
      event: string,
      listener: (...args: unknown[]) => void,
    ) => {
      if (event === 'SIGTERM')
        sigTermListeners.push(listener as NodeJS.SignalsListener);
      if (event === 'SIGINT')
        sigIntListeners.push(listener as NodeJS.SignalsListener);
      return process;
    }) as typeof process.on);

    processOffSpy = vi.spyOn(process, 'off').mockImplementation(((
      event: string,
      listener: (...args: unknown[]) => void,
    ) => {
      if (event === 'SIGTERM') {
        sigTermListeners = sigTermListeners.filter((l) => l !== listener);
      }
      if (event === 'SIGINT') {
        sigIntListeners = sigIntListeners.filter((l) => l !== listener);
      }
      return process;
    }) as typeof process.off);

    processExitSpy = vi
      .spyOn(process, 'exit')
      .mockImplementation((() => undefined) as unknown as typeof process.exit);

    stdinDestroySpy = vi
      .spyOn(process.stdin, 'destroy')
      .mockImplementation(() => process.stdin);
    stdoutDestroySpy = vi
      .spyOn(process.stdout, 'destroy')
      .mockImplementation(() => process.stdout);
  });

  afterEach(() => {
    processExitSpy.mockRestore();
    stdinDestroySpy.mockRestore();
    stdoutDestroySpy.mockRestore();
    vi.clearAllMocks();
  });

  afterAll(() => {
    processOnSpy.mockRestore();
    processOffSpy.mockRestore();
  });

  it('fires SessionEnd hook with Other reason on SIGTERM', async () => {
    const agentPromise = runAcpAgent(mockConfig, mockSettings, mockArgv);

    await vi.waitFor(() => {
      expect(sigTermListeners.length).toBeGreaterThan(0);
    });

    sigTermListeners[0]('SIGTERM');

    await vi.waitFor(() => {
      expect(mockHookSystem.fireSessionEndEvent).toHaveBeenCalledWith(
        SessionEndReason.Other,
      );
    });

    mockConnectionState.resolve();
    await agentPromise;
  });

  it('fires SessionEnd hook with Other reason on SIGINT', async () => {
    const agentPromise = runAcpAgent(mockConfig, mockSettings, mockArgv);

    await vi.waitFor(() => {
      expect(sigIntListeners.length).toBeGreaterThan(0);
    });

    sigIntListeners[0]('SIGINT');

    await vi.waitFor(() => {
      expect(mockHookSystem.fireSessionEndEvent).toHaveBeenCalledWith(
        SessionEndReason.Other,
      );
    });

    mockConnectionState.resolve();
    await agentPromise;
  });

  it('fires SessionEnd hook with PromptInputExit on connection.closed', async () => {
    const agentPromise = runAcpAgent(mockConfig, mockSettings, mockArgv);

    // Resolve connection to simulate IDE disconnect
    mockConnectionState.resolve();

    await vi.waitFor(() => {
      expect(mockHookSystem.fireSessionEndEvent).toHaveBeenCalledWith(
        SessionEndReason.PromptInputExit,
      );
    });

    await agentPromise;
  });

  it('does not fire SessionEnd hook when hooks are disabled', async () => {
    mockConfig.getDisableAllHooks = vi.fn().mockReturnValue(true);

    const agentPromise = runAcpAgent(mockConfig, mockSettings, mockArgv);

    await vi.waitFor(() => {
      expect(sigTermListeners.length).toBeGreaterThan(0);
    });

    sigTermListeners[0]('SIGTERM');

    await vi.waitFor(() => {
      expect(mockRunExitCleanup).toHaveBeenCalled();
    });

    // SessionEnd hook should NOT be called
    expect(mockHookSystem.fireSessionEndEvent).not.toHaveBeenCalled();

    mockConnectionState.resolve();
    await agentPromise;
  });

  it('does not fire SessionEnd hook when event not registered', async () => {
    mockConfig.hasHooksForEvent = vi.fn().mockReturnValue(false);

    const agentPromise = runAcpAgent(mockConfig, mockSettings, mockArgv);

    await vi.waitFor(() => {
      expect(sigTermListeners.length).toBeGreaterThan(0);
    });

    sigTermListeners[0]('SIGTERM');

    await vi.waitFor(() => {
      expect(mockRunExitCleanup).toHaveBeenCalled();
    });

    // SessionEnd hook should NOT be called
    expect(mockHookSystem.fireSessionEndEvent).not.toHaveBeenCalled();

    mockConnectionState.resolve();
    await agentPromise;
  });

  it('fires SessionEnd hook only once when SIGTERM triggers before connection.closed', async () => {
    const agentPromise = runAcpAgent(mockConfig, mockSettings, mockArgv);

    await vi.waitFor(() => {
      expect(sigTermListeners.length).toBeGreaterThan(0);
    });

    // Trigger SIGTERM first
    sigTermListeners[0]('SIGTERM');

    await vi.waitFor(() => {
      expect(mockHookSystem.fireSessionEndEvent).toHaveBeenCalledWith(
        SessionEndReason.Other,
      );
    });

    // Now resolve connection.closed - this should NOT trigger another SessionEnd
    mockConnectionState.resolve();

    // Wait for the agent to complete
    await agentPromise;

    // SessionEnd should have been called exactly once
    expect(mockHookSystem.fireSessionEndEvent).toHaveBeenCalledTimes(1);
  });
});

// ---------------------------------------------------------------------------
// Unit tests for toStdioServer / toSseServer / toHttpServer helpers
// ---------------------------------------------------------------------------

describe('toStdioServer', () => {
  const stdioServer = {
    name: 'my-stdio',
    command: 'node',
    args: ['server.js'],
    env: [],
  } as unknown as McpServer;

  const sseServer = {
    type: 'sse',
    name: 'my-sse',
    url: 'http://localhost:3000/sse',
    headers: [],
  } as unknown as McpServer;

  it('returns the server when it is a stdio server', () => {
    expect(toStdioServer(stdioServer)).toBe(stdioServer);
  });

  it('returns undefined for SSE server', () => {
    expect(toStdioServer(sseServer)).toBeUndefined();
  });

  it('returns undefined for HTTP server', () => {
    const httpServer = {
      type: 'http',
      name: 'my-http',
      url: 'http://localhost:3000/mcp',
      headers: [],
    } as unknown as McpServer;
    expect(toStdioServer(httpServer)).toBeUndefined();
  });
});

describe('toSseServer', () => {
  it('returns the server when type is sse', () => {
    const sseServer = {
      type: 'sse',
      name: 'my-sse',
      url: 'http://localhost:3000/sse',
      headers: [],
    } as unknown as McpServer;
    const result = toSseServer(sseServer);
    expect(result).toBe(sseServer);
    expect(result?.type).toBe('sse');
  });

  it('returns undefined for stdio server', () => {
    const stdioServer = {
      name: 'my-stdio',
      command: 'node',
      args: [],
      env: [],
    } as unknown as McpServer;
    expect(toSseServer(stdioServer)).toBeUndefined();
  });

  it('returns undefined for http server', () => {
    const httpServer = {
      type: 'http',
      name: 'my-http',
      url: 'http://localhost:3000/mcp',
      headers: [],
    } as unknown as McpServer;
    expect(toSseServer(httpServer)).toBeUndefined();
  });
});

describe('toHttpServer', () => {
  it('returns the server when type is http', () => {
    const httpServer = {
      type: 'http',
      name: 'my-http',
      url: 'http://localhost:3000/mcp',
      headers: [],
    } as unknown as McpServer;
    const result = toHttpServer(httpServer);
    expect(result).toBe(httpServer);
    expect(result?.type).toBe('http');
  });

  it('returns undefined for stdio server', () => {
    const stdioServer = {
      name: 'my-stdio',
      command: 'node',
      args: [],
      env: [],
    } as unknown as McpServer;
    expect(toHttpServer(stdioServer)).toBeUndefined();
  });

  it('returns undefined for sse server', () => {
    const sseServer = {
      type: 'sse',
      name: 'my-sse',
      url: 'http://localhost:3000/sse',
      headers: [],
    } as unknown as McpServer;
    expect(toHttpServer(sseServer)).toBeUndefined();
  });
});

// ---------------------------------------------------------------------------
// Tests for QwenAgent.initialize() mcpCapabilities + newSession SSE/HTTP
// ---------------------------------------------------------------------------

describe('QwenAgent MCP SSE/HTTP support', () => {
  // We need to capture the agent factory from AgentSideConnection constructor
  let capturedAgentFactory:
    | ((conn: AgentSideConnectionLike) => AgentLike)
    | undefined;

  type AgentSideConnectionLike = { closed: Promise<void> };
  type AgentLike = {
    initialize: (args: Record<string, unknown>) => Promise<unknown>;
    newSession: (args: Record<string, unknown>) => Promise<unknown>;
  };

  let mockConfig: Config;
  let processExitSpy: MockInstance<typeof process.exit>;
  let stdinDestroySpy: MockInstance<typeof process.stdin.destroy>;
  let stdoutDestroySpy: MockInstance<typeof process.stdout.destroy>;

  const mockArgv = {} as CliArgs;

  beforeEach(() => {
    vi.clearAllMocks();
    mockConnectionState.reset();
    capturedAgentFactory = undefined;

    // Override AgentSideConnection mock to capture factory
    vi.mocked(AgentSideConnection).mockImplementation((factory: unknown) => {
      capturedAgentFactory = factory as typeof capturedAgentFactory;
      return {
        get closed() {
          return mockConnectionState.promise;
        },
      } as unknown as InstanceType<typeof AgentSideConnection>;
    });

    mockConfig = {
      initialize: vi.fn().mockResolvedValue(undefined),
      getHookSystem: vi.fn().mockReturnValue(undefined),
      getDisableAllHooks: vi.fn().mockReturnValue(false),
      hasHooksForEvent: vi.fn().mockReturnValue(false),
      getModel: vi.fn().mockReturnValue('test-model'),
      getModelsConfig: vi.fn().mockReturnValue({
        getCurrentAuthType: vi.fn().mockReturnValue('api-key'),
      }),
      refreshAuth: vi.fn().mockResolvedValue(undefined),
    } as unknown as Config;

    processExitSpy = vi
      .spyOn(process, 'exit')
      .mockImplementation((() => undefined) as unknown as typeof process.exit);
    stdinDestroySpy = vi
      .spyOn(process.stdin, 'destroy')
      .mockImplementation(() => process.stdin);
    stdoutDestroySpy = vi
      .spyOn(process.stdout, 'destroy')
      .mockImplementation(() => process.stdout);
  });

  afterEach(() => {
    processExitSpy.mockRestore();
    stdinDestroySpy.mockRestore();
    stdoutDestroySpy.mockRestore();
  });

  it('initialize response includes mcpCapabilities with sse and http', async () => {
    const mockSettings = {
      merged: { mcpServers: {} },
    } as unknown as LoadedSettings;
    const agentPromise = runAcpAgent(mockConfig, mockSettings, mockArgv);

    await vi.waitFor(() => expect(capturedAgentFactory).toBeDefined());

    const fakeConn = {
      get closed() {
        return mockConnectionState.promise;
      },
    } as AgentSideConnectionLike;

    const agent = capturedAgentFactory!(fakeConn) as AgentLike;
    const response = await agent.initialize({ clientCapabilities: {} });

    expect(response).toMatchObject({
      agentCapabilities: {
        mcpCapabilities: {
          sse: true,
          http: true,
        },
      },
    });

    mockConnectionState.resolve();
    await agentPromise;
  });

  function makeInnerConfig() {
    return {
      initialize: vi.fn().mockResolvedValue(undefined),
      getModelsConfig: vi.fn().mockReturnValue({
        getCurrentAuthType: vi.fn().mockReturnValue('api-key'),
      }),
      refreshAuth: vi.fn().mockResolvedValue(undefined),
      getModel: vi.fn().mockReturnValue('m'),
      getContentGeneratorConfig: vi.fn().mockReturnValue({}),
      getAvailableModels: vi.fn().mockReturnValue([]),
      getModes: vi.fn().mockReturnValue([]),
      getApprovalMode: vi.fn().mockReturnValue('default'),
      getSessionId: vi.fn().mockReturnValue('test-session-id'),
      getAuthType: vi.fn().mockReturnValue('api-key'),
      getAllConfiguredModels: vi.fn().mockReturnValue([]),
      getGeminiClient: vi.fn().mockReturnValue({
        isInitialized: vi.fn().mockReturnValue(true),
        initialize: vi.fn().mockResolvedValue(undefined),
      }),
      getFileSystemService: vi.fn().mockReturnValue(undefined),
      setFileSystemService: vi.fn(),
      getHookSystem: vi.fn().mockReturnValue(undefined),
      getDisableAllHooks: vi.fn().mockReturnValue(true),
      hasHooksForEvent: vi.fn().mockReturnValue(false),
    };
  }

  function makeSessionSettings() {
    return {
      merged: { mcpServers: {} },
      getUserHooks: vi.fn().mockReturnValue({}),
      getProjectHooks: vi.fn().mockReturnValue({}),
    } as unknown as LoadedSettings;
  }

  async function setupSessionMocks(sessionId: string) {
    const innerConfig = makeInnerConfig();
    vi.mocked(loadSettings).mockReturnValue(makeSessionSettings());
    vi.mocked(loadCliConfig).mockResolvedValue(
      innerConfig as unknown as Config,
    );
    vi.mocked(Session).mockImplementation(
      () =>
        ({
          getId: vi.fn().mockReturnValue(sessionId),
          getConfig: vi.fn().mockReturnValue(innerConfig),
          sendAvailableCommandsUpdate: vi.fn().mockResolvedValue(undefined),
          replayHistory: vi.fn().mockResolvedValue(undefined),
          installRewriter: vi.fn(),
        }) as unknown as InstanceType<typeof Session>,
    );
    return innerConfig;
  }

  it('newSession with SSE MCP server creates MCPServerConfig with url', async () => {
    await setupSessionMocks('session-sse');

    const agentPromise = runAcpAgent(
      mockConfig,
      makeSessionSettings(),
      mockArgv,
    );
    await vi.waitFor(() => expect(capturedAgentFactory).toBeDefined());

    const agent = capturedAgentFactory!({
      get closed() {
        return mockConnectionState.promise;
      },
    }) as AgentLike;

    await agent.newSession({
      cwd: '/tmp',
      mcpServers: [
        {
          type: 'sse',
          name: 'my-sse-server',
          url: 'http://localhost:3001/sse',
          headers: [{ name: 'Authorization', value: 'Bearer token123' }],
        },
      ],
    });

    expect(MCPServerConfig).toHaveBeenCalledWith(
      undefined,
      undefined,
      undefined,
      undefined,
      'http://localhost:3001/sse',
      undefined,
      { Authorization: 'Bearer token123' },
    );

    mockConnectionState.resolve();
    await agentPromise;
  });

  it('newSession with HTTP MCP server creates MCPServerConfig with httpUrl', async () => {
    await setupSessionMocks('session-http');

    const agentPromise = runAcpAgent(
      mockConfig,
      makeSessionSettings(),
      mockArgv,
    );
    await vi.waitFor(() => expect(capturedAgentFactory).toBeDefined());

    const agent = capturedAgentFactory!({
      get closed() {
        return mockConnectionState.promise;
      },
    }) as AgentLike;

    await agent.newSession({
      cwd: '/tmp',
      mcpServers: [
        {
          type: 'http',
          name: 'my-http-server',
          url: 'http://localhost:3002/mcp',
          headers: [],
        },
      ],
    });

    expect(MCPServerConfig).toHaveBeenCalledWith(
      undefined,
      undefined,
      undefined,
      undefined,
      undefined,
      'http://localhost:3002/mcp',
      undefined,
    );

    mockConnectionState.resolve();
    await agentPromise;
  });

  it('newSession with SSE MCP server and empty headers passes undefined for headers', async () => {
    await setupSessionMocks('session-sse-noheaders');

    const agentPromise = runAcpAgent(
      mockConfig,
      makeSessionSettings(),
      mockArgv,
    );
    await vi.waitFor(() => expect(capturedAgentFactory).toBeDefined());

    const agent = capturedAgentFactory!({
      get closed() {
        return mockConnectionState.promise;
      },
    }) as AgentLike;

    await agent.newSession({
      cwd: '/tmp',
      mcpServers: [
        {
          type: 'sse',
          name: 'no-header-sse',
          url: 'http://localhost:3003/sse',
          headers: [],
        },
      ],
    });

    expect(MCPServerConfig).toHaveBeenCalledWith(
      undefined,
      undefined,
      undefined,
      undefined,
      'http://localhost:3003/sse',
      undefined,
      undefined,
    );

    mockConnectionState.resolve();
    await agentPromise;
  });
});