import { afterEach, describe, expect, it, vi } from 'vitest';
import { api, ApiError, errorMessage } from '../apiClient.ts';

const jsonResponse = (body: unknown, status = 200, headers: Record<string, string> = {}) =>
  new Response(JSON.stringify(body), {
    status,
    headers: { 'Content-Type': 'application/json', ...headers },
  });

describe('apiClient', () => {
  afterEach(() => {
    vi.unstubAllGlobals();
    document.cookie = 'csrftoken=; Max-Age=0; path=/';
  });

  it('unwraps paginated list results', async () => {
    vi.stubGlobal(
      'fetch',
      vi.fn().mockResolvedValue(
        jsonResponse({
          count: 1,
          next: null,
          previous: null,
          results: [{ id: 7, site_name: 'Sukawarna', user: 1 }],
        })
      )
    );

    const sites = await api.sites.list();
    expect(sites).toEqual([{ id: 7, site_name: 'Sukawarna', user: 1 }]);
  });

  it('unwraps a bare array list', async () => {
    vi.stubGlobal(
      'fetch',
      vi.fn().mockResolvedValue(jsonResponse([{ id: 2, site_name: 'Cilayang', user: 1 }]))
    );

    const sites = await api.sites.list();
    expect(sites[0]?.site_name).toBe('Cilayang');
  });

  it('sends CSRF token on POST', async () => {
    document.cookie = 'csrftoken=abc123; path=/';
    const fetchMock = vi.fn().mockResolvedValue(jsonResponse({ id: 1, user_name: 'admin' }));
    vi.stubGlobal('fetch', fetchMock);

    await api.auth.login('admin', 'admin123');

    const init = fetchMock.mock.calls[0]?.[1] as RequestInit;
    const headers = new Headers(init.headers);
    expect(headers.get('X-CSRFToken')).toBe('abc123');
    expect(init.credentials).toBe('include');
  });

  it('throws ApiError with detail and status', async () => {
    document.cookie = 'csrftoken=abc123; path=/';
    vi.stubGlobal(
      'fetch',
      vi.fn().mockResolvedValue(jsonResponse({ detail: 'Bad credentials' }, 400))
    );

    await expect(api.auth.login('x', 'y')).rejects.toMatchObject({
      name: 'ApiError',
      status: 400,
      message: 'Bad credentials',
    });
  });

  it('maps unknown errors through errorMessage', () => {
    expect(errorMessage(new ApiError('Gagal', 502, null))).toBe('Gagal');
    expect(errorMessage(new Error('boom'))).toBe('boom');
    expect(errorMessage('nope')).toBe('Terjadi kesalahan');
  });
});