import { beforeEach, describe, expect, it, vi } from 'vitest';

const handleMock = vi.fn();

vi.mock('electron', () => ({
  ipcMain: { handle: handleMock },
}));

vi.mock('../../electron/utils/config', () => ({
  getPort: () => 13210,
}));

vi.mock('../../electron/api/server', () => ({
  getHostApiToken: () => 'host-token',
}));

vi.mock('../../electron/api/renderer-capability', () => ({
  getRendererCapability: () => 'renderer-token',
  RENDERER_CAPABILITY_HEADER: 'x-niancode-renderer-capability',
}));

describe('Host API IPC proxy', () => {
  beforeEach(() => {
    vi.resetModules();
    vi.clearAllMocks();
    vi.unstubAllGlobals();
  });

  it('connects to the loopback Host API with direct fetch', async () => {
    const fetchMock = vi.fn().mockResolvedValue(new Response(
      JSON.stringify({ success: true }),
      { status: 200, headers: { 'content-type': 'application/json' } },
    ));
    vi.stubGlobal('fetch', fetchMock);

    const { registerHostApiProxyHandlers } = await import('../../electron/main/ipc/host-api-proxy');
    registerHostApiProxyHandlers();

    const fetchHandler = handleMock.mock.calls.find(([channel]) => channel === 'hostapi:fetch')?.[1];
    expect(fetchHandler).toBeTypeOf('function');

    const result = await fetchHandler(undefined, {
      path: '/api/coding/projects/create',
      method: 'POST',
      body: JSON.stringify({ projectName: '测试项目' }),
    });

    expect(fetchMock).toHaveBeenCalledWith(
      'http://127.0.0.1:13210/api/coding/projects/create',
      expect.objectContaining({
        method: 'POST',
        headers: expect.objectContaining({
          Authorization: 'Bearer host-token',
          'Content-Type': 'application/json',
          'x-niancode-renderer-capability': 'renderer-token',
        }),
      }),
    );
    expect(result).toEqual({
      ok: true,
      data: { status: 200, ok: true, json: { success: true } },
    });
  });

  it('preserves ordinary renderer headers but replaces forged security headers', async () => {
    const fetchMock = vi.fn().mockResolvedValue(new Response(null, { status: 204 }));
    vi.stubGlobal('fetch', fetchMock);

    const { registerHostApiProxyHandlers } = await import('../../electron/main/ipc/host-api-proxy');
    registerHostApiProxyHandlers();

    const fetchHandler = handleMock.mock.calls.find(([channel]) => channel === 'hostapi:fetch')?.[1];
    expect(fetchHandler).toBeTypeOf('function');

    await fetchHandler(undefined, {
      path: '/api/ai-hardware',
      headers: {
        Accept: 'application/json',
        'X-Renderer-Request': 'hardware-overview',
        authorization: 'Bearer renderer-forged-token',
        'X-NIANCODE-RENDERER-CAPABILITY': 'renderer-forged-capability',
      },
    });

    const [, init] = fetchMock.mock.calls[0] as [string, RequestInit];
    const headers = new Headers(init.headers);
    expect(headers.get('accept')).toBe('application/json');
    expect(headers.get('x-renderer-request')).toBe('hardware-overview');
    expect(headers.get('authorization')).toBe('Bearer host-token');
    expect(headers.get('x-niancode-renderer-capability')).toBe('renderer-token');
  });

  it('dispatches short JSON requests in Main without opening loopback HTTP', async () => {
    const fetchMock = vi.fn();
    vi.stubGlobal('fetch', fetchMock);
    vi.doMock('../../electron/api/host-api-dispatcher', () => ({
      dispatchHostApiRequest: vi.fn().mockResolvedValue({
        status: 200,
        ok: true,
        json: { success: true, transport: 'test' },
      }),
    }));

    const { registerHostApiProxyHandlers } = await import('../../electron/main/ipc/host-api-proxy');
    registerHostApiProxyHandlers({} as never);

    const fetchHandler = handleMock.mock.calls.find(([channel]) => channel === 'hostapi:fetch')?.[1];
    const result = await fetchHandler(undefined, { path: '/api/app/runtime-info' });

    expect(fetchMock).not.toHaveBeenCalled();
    expect(result).toEqual({
      ok: true,
      data: { status: 200, ok: true, json: { success: true, transport: 'test' }, transport: 'dispatcher' },
    });
  });

  it('keeps attachment upload bytes raw and returns image bytes through IPC', async () => {
    const fetchMock = vi.fn()
      .mockResolvedValueOnce(new Response(
        JSON.stringify({ attachmentId: 'attachment-1', mime: 'image/png', byteLength: 4 }),
        { status: 201, headers: { 'content-type': 'application/json' } },
      ))
      .mockResolvedValueOnce(new Response(
        new Uint8Array([1, 2, 3, 4]),
        { status: 200, headers: { 'content-type': 'image/png' } },
      ));
    vi.stubGlobal('fetch', fetchMock);

    const { registerHostApiProxyHandlers } = await import('../../electron/main/ipc/host-api-proxy');
    registerHostApiProxyHandlers({} as never);
    const fetchHandler = handleMock.mock.calls.find(([channel]) => channel === 'hostapi:fetch')?.[1];

    const upload = await fetchHandler(undefined, {
      path: '/api/coding/attachments',
      method: 'POST',
      headers: { 'Content-Type': 'image/png' },
      body: new Uint8Array([1, 2, 3, 4]).buffer,
    });
    const [, uploadInit] = fetchMock.mock.calls[0] as [string, RequestInit];
    expect(Array.from(uploadInit.body as Uint8Array)).toEqual([1, 2, 3, 4]);
    expect(new Headers(uploadInit.headers).get('content-type')).toBe('image/png');
    expect(upload).toMatchObject({
      ok: true,
      data: { status: 201, json: { attachmentId: 'attachment-1' } },
    });

    const preview = await fetchHandler(undefined, {
      path: '/api/coding/attachments/attachment-1/content',
      method: 'GET',
    });
    expect(preview).toMatchObject({
      ok: true,
      data: {
        status: 200,
        contentType: 'image/png',
        bytes: new Uint8Array([1, 2, 3, 4]),
      },
    });
  });
});