import { renderHook, act } from '@testing-library/react';
import { vi, test, expect, beforeEach } from 'vitest';

vi.mock('../syncService.js', () => ({ getRemotePrayers: vi.fn(), saveRemotePrayers: vi.fn() }));
import { usePrayers } from './usePrayers.js';
import { getRemotePrayers, saveRemotePrayers } from '../syncService.js';

beforeEach(() => {
  localStorage.clear();
  vi.clearAllMocks();
  getRemotePrayers.mockResolvedValue({ ok: true, data: { prayers: [] } });
  saveRemotePrayers.mockImplementation(async (list) => ({ ok: true, data: { prayers: list } }));
});

test('prayers are added, changed, answered and kept on this device', () => {
  const { result } = renderHook(() => usePrayers());
  let id;
  act(() => { id = result.current.addPrayer({ text: 'Peace at home', forWhom: 'Family' }).id; });
  expect(result.current.prayers[0]).toMatchObject({ text: 'Peace at home', forWhom: 'Family' });
  act(() => result.current.editPrayer(id, { text: 'Peace and joy at home' }));
  act(() => result.current.togglePrayed(id));
  expect(result.current.prayers[0].prayedOn).toHaveLength(1);
  act(() => result.current.answerPrayer(id, 'Yes'));
  expect(result.current.prayers[0]).toMatchObject({ text: 'Peace and joy at home', answerNote: 'Yes' });
  expect(result.current.prayers[0].answeredAt).toBeGreaterThan(0);
  act(() => result.current.reopenPrayer(id));
  expect(result.current.prayers[0].answeredAt).toBeNull();
  expect(JSON.parse(localStorage.getItem('prayers'))[0].text).toBe('Peace and joy at home');
});

test('a deleted prayer can be taken back', () => {
  const { result } = renderHook(() => usePrayers());
  let id; let undo;
  act(() => { id = result.current.addPrayer({ text: 'Keep me' }).id; });
  act(() => { undo = result.current.deletePrayer(id); });
  expect(result.current.prayers[0].deleted).toBe(true);
  act(() => undo());
  expect(result.current.prayers[0]).toMatchObject({ id, text: 'Keep me' });
  expect(result.current.prayers[0].deleted).toBeUndefined();
});

test('signing in merges with the account and sends back what it lacked', async () => {
  localStorage.setItem('prayers', JSON.stringify([{ id: 'local', text: 'Only here', forWhom: '', verses: [], prayedOn: [], createdAt: 1, updatedAt: 5, answeredAt: null, answerNote: '' }]));
  getRemotePrayers.mockResolvedValue({ ok: true, data: { prayers: [{ id: 'remote', text: 'Only there', forWhom: '', verses: [], prayedOn: [], createdAt: 1, updatedAt: 6, answeredAt: null, answerNote: '' }] } });
  const { result } = renderHook(() => usePrayers());
  await act(async () => { await result.current.pullPrayers(); });
  expect(result.current.prayers.map((p) => p.id).sort()).toEqual(['local', 'remote']);
  expect(saveRemotePrayers).toHaveBeenCalled();
});

test('signing out clears the journal from this device', async () => {
  const { result } = renderHook(() => usePrayers());
  act(() => { result.current.addPrayer({ text: 'Private' }); });
  act(() => result.current.stopPrayers());
  expect(result.current.prayers).toEqual([]);
  expect(localStorage.getItem('prayers')).toBeNull();
});