import { test } from 'node:test';
import assert from 'node:assert/strict';
import { createStore } from 'jotai';
import { toastQueueAtom, dismissToastAtom, ToastNotif, createDownloadToast } from './toast';

// The queue lives in an unexported baseAtom; we drive the two write-only setters
// (toastQueueAtom append + null no-op guard, dismissToastAtom remove-by-id)
// through a jotai store and read back via toastQueueAtom's getter.

const makeToast = (id: string): ToastNotif => ({
  id,
  displayName: `name-${id}`,
  body: `body-${id}`,
  roomName: `room-${id}`,
  roomId: `!${id}:server`,
});

test('starts empty', () => {
  const store = createStore();
  assert.deepEqual(store.get(toastQueueAtom), []);
});

test('toastQueueAtom appends in order', () => {
  const store = createStore();
  const a = makeToast('a');
  const b = makeToast('b');
  store.set(toastQueueAtom, a);
  store.set(toastQueueAtom, b);
  assert.deepEqual(
    store.get(toastQueueAtom).map((t) => t.id),
    ['a', 'b'],
  );
  assert.equal(store.get(toastQueueAtom)[0], a);
});

test('toastQueueAtom ignores null (no-op guard)', () => {
  const store = createStore();
  store.set(toastQueueAtom, makeToast('a'));
  store.set(toastQueueAtom, null);
  assert.deepEqual(
    store.get(toastQueueAtom).map((t) => t.id),
    ['a'],
  );
});

test('toastQueueAtom allows duplicate ids (no dedupe)', () => {
  const store = createStore();
  store.set(toastQueueAtom, makeToast('a'));
  store.set(toastQueueAtom, makeToast('a'));
  assert.equal(store.get(toastQueueAtom).length, 2);
});

test('dismissToastAtom removes the matching id only', () => {
  const store = createStore();
  store.set(toastQueueAtom, makeToast('a'));
  store.set(toastQueueAtom, makeToast('b'));
  store.set(toastQueueAtom, makeToast('c'));

  store.set(dismissToastAtom, 'b');
  assert.deepEqual(
    store.get(toastQueueAtom).map((t) => t.id),
    ['a', 'c'],
  );
});

test('dismissToastAtom removes every entry sharing the id', () => {
  const store = createStore();
  store.set(toastQueueAtom, makeToast('a'));
  store.set(toastQueueAtom, makeToast('a'));
  store.set(toastQueueAtom, makeToast('b'));

  store.set(dismissToastAtom, 'a');
  assert.deepEqual(
    store.get(toastQueueAtom).map((t) => t.id),
    ['b'],
  );
});

test('dismissToastAtom for an unknown id is a no-op', () => {
  const store = createStore();
  store.set(toastQueueAtom, makeToast('a'));
  store.set(dismissToastAtom, 'missing');
  assert.deepEqual(
    store.get(toastQueueAtom).map((t) => t.id),
    ['a'],
  );
});

test('createDownloadToast: filename in body, no room navigation, unique ids', () => {
  const a = createDownloadToast('photo.jpg');
  assert.equal(a.displayName, 'Downloaded');
  assert.equal(a.body, 'photo.jpg');
  // roomId empty + an onClick present → clicking dismisses without navigating to a room.
  assert.equal(a.roomId, '');
  assert.equal(a.roomName, '');
  assert.equal(typeof a.onClick, 'function');
  const b = createDownloadToast('photo.jpg');
  assert.notEqual(a.id, b.id);
});