import { beforeEach, describe, expect, it, vi } from 'vitest';
import { getLogs } from './logs';

const samplePage = {
  totalCount: 2,
  page: [
    { timestamp: '2026-07-07T00:00:00Z', level: 'Warning', message: 'uh oh' },
    { timestamp: '2026-07-07T00:01:00Z', level: 'Information', message: 'all good' }
  ]
};

describe('getLogs', () => {
  beforeEach(() => {
    window.localStorage.clear();
    vi.restoreAllMocks();
  });

  it('GETs /api/logs with no query string when called without params', async () => {
    const fetchSpy = vi.spyOn(window, 'fetch').mockResolvedValue(
      new Response(JSON.stringify(samplePage), {
        headers: { 'Content-Type': 'application/json' },
        status: 200
      })
    );

    await expect(getLogs()).resolves.toMatchObject({ totalCount: 2 });

    const [url, init] = fetchSpy.mock.calls[0];
    expect(url).toBe('/api/logs');
    expect((init?.method ?? 'GET').toUpperCase()).toBe('GET');
  });

  it('builds the query string from filter, pageNum and pageSize', async () => {
    const fetchSpy = vi.spyOn(window, 'fetch').mockResolvedValue(
      new Response(JSON.stringify(samplePage), {
        headers: { 'Content-Type': 'application/json' },
        status: 200
      })
    );

    await getLogs({ filter: 'boom', pageNum: 2, pageSize: 50 });

    const [url] = fetchSpy.mock.calls[0];
    expect(url).toBe('/api/logs?filter=boom&pageNum=2&pageSize=50');
  });

  it('rejects with the ApiError status on failure', async () => {
    vi.spyOn(window, 'fetch').mockResolvedValue(
      new Response(JSON.stringify({ status: 500, title: 'Server Error' }), {
        headers: { 'Content-Type': 'application/json' },
        status: 500
      })
    );

    await expect(getLogs()).rejects.toMatchObject({ status: 500 });
  });
});