/**
 * mcp.js is a side-effect entrypoint (listen). Load it with mocks so we cover
 * wiring without binding a real port.
 */
describe('mcp.js entry', () => {
  const originalEnv = { ...process.env };
  let listenCb;
  let mockApp;
  let registerMcpHttp;

  beforeEach(() => {
    jest.resetModules();
    listenCb = null;
    mockApp = {
      use: jest.fn(),
      get: jest.fn((path, handler) => {
        mockApp._health = handler;
      }),
      listen: jest.fn((port, cb) => {
        listenCb = cb;
        return { close: jest.fn() };
      }),
    };
    const expressFn = jest.fn(() => mockApp);
    expressFn.json = jest.fn(() => (req, res, next) => next && next());
    jest.doMock('express', () => expressFn);
    registerMcpHttp = jest.fn();
    jest.doMock('../src/mcp-http', () => ({ registerMcpHttp }));
  });

  afterEach(() => {
    process.env = { ...originalEnv };
    jest.resetModules();
    jest.dontMock('express');
    jest.dontMock('../src/mcp-http');
  });

  it('registers health + MCP and listens (auth mode)', () => {
    process.env.WEBSHARE_USERNAME = 'user';
    process.env.WEBSHARE_PASSWORD = 'pass';
    process.env.PORT = '3456';
    process.env.MCP_PATH = '/custom-mcp';

    require('../src/mcp');

    expect(mockApp.use).toHaveBeenCalled();
    expect(registerMcpHttp).toHaveBeenCalledWith(mockApp, {
      username: 'user',
      password: 'pass',
      path: '/custom-mcp',
    });
    expect(mockApp.listen).toHaveBeenCalledWith('3456', expect.any(Function));

    const res = { json: jest.fn() };
    mockApp._health({}, res);
    expect(res.json).toHaveBeenCalledWith({
      ok: true,
      mcp: '/custom-mcp',
      guest: false,
    });

    const log = jest.spyOn(console, 'log').mockImplementation(() => {});
    listenCb();
    expect(log).toHaveBeenCalledWith(expect.stringMatching(/auth/));
    log.mockRestore();
  });

  it('reports guest mode when credentials missing', () => {
    delete process.env.WEBSHARE_USERNAME;
    delete process.env.WEBSHARE_PASSWORD;
    delete process.env.PORT;
    delete process.env.MCP_PATH;

    require('../src/mcp');
    const res = { json: jest.fn() };
    mockApp._health({}, res);
    expect(res.json).toHaveBeenCalledWith({
      ok: true,
      mcp: '/mcp',
      guest: true,
    });

    const log = jest.spyOn(console, 'log').mockImplementation(() => {});
    listenCb();
    expect(log).toHaveBeenCalledWith(expect.stringMatching(/guest/));
    log.mockRestore();
  });
});