import { afterEach, describe, expect, it, vi } from 'vitest';
import { apiFetch, setApiBase } from './http';

describe('API contract preflight', () => {
  afterEach(() => {
    setApiBase('/api/v1');
    vi.unstubAllGlobals();
  });

  it('blocks API requests when the server has a newer breaking major', async () => {
    const fetchMock = vi.fn(async () => new Response(JSON.stringify({ contract_version: '7.0.0' }), { status: 200 }));
    vi.stubGlobal('fetch', fetchMock);
    setApiBase('http://api.test/api/v1');

    await expect(apiFetch('/channels')).rejects.toThrow('api_contract_mismatch');
    expect(fetchMock).toHaveBeenCalledTimes(1);
    expect(fetchMock).toHaveBeenCalledWith('http://api.test/api/v1/info', expect.any(Object));
  });

  it('checks the contract once and then sends the API request', async () => {
    const fetchMock = vi.fn()
      .mockResolvedValueOnce(new Response(JSON.stringify({ contract_version: '6.0.0' }), { status: 200 }))
      .mockResolvedValueOnce(new Response('{}', { status: 200 }))
      .mockResolvedValueOnce(new Response('{}', { status: 200 }));
    vi.stubGlobal('fetch', fetchMock);
    setApiBase('http://api.test/api/v1');

    await expect(apiFetch('/channels')).resolves.toBeInstanceOf(Response);
    await expect(apiFetch('/shares')).resolves.toBeInstanceOf(Response);
    expect(fetchMock).toHaveBeenCalledTimes(3);
  });
});