// A refresh reopens the chat the person was in, per account; "New chat"
// forgets it; a chat deleted elsewhere is simply gone.
const test = require('node:test');
const assert = require('node:assert/strict');
const fs = require('node:fs');
const path = require('node:path');
const src = fs.readFileSync(path.join(__dirname, '..', 'public/js/clinicalAssistant.js'), 'utf8');

test('the open chat is remembered when it is loaded or saved, and forgotten on a new chat', () => {
  assert.match(src, /var OPEN_CHAT_KEY = 'ped_assistant_open_chat'/);
  assert.match(src, /modelStorageKey\(OPEN_CHAT_KEY\)/, 'scoped to the account like the model choice');
  const load = src.slice(src.indexOf('function loadSavedChat'), src.indexOf('function restoreSavedChat'));
  assert.match(load, /rememberOpenChat\(currentChatId\)/);
  const save = src.slice(src.indexOf('function performAutosave'), src.indexOf('function performAutosave') + 900);
  assert.match(save, /if \(data\.id\) currentChatId = data\.id;\s*\n\s*rememberOpenChat\(currentChatId\)/);
  const clear = src.slice(src.indexOf('function performClearConversation'), src.indexOf('function cancelAssistantSearch'));
  assert.match(clear, /currentChatId = null;\s*\n\s*rememberOpenChat\(null\)/);
});

test('the page reopens it on load, quietly, and forgets a chat that no longer exists', () => {
  const init = src.slice(src.indexOf('function initIfNeeded'), src.indexOf('function onceOnDocument'));
  assert.match(init, /loadExamples\(\);\s*\n\s*restoreOpenChat\(\);/);
  const restore = src.slice(src.indexOf('function restoreOpenChat'), src.indexOf('function restoreOpenChat') + 900);
  assert.match(restore, /fetchSavedAssistantChat\(id\)/);
  assert.match(restore, /\.catch\(function \(\) \{ rememberOpenChat\(null\); \}\)/);
  assert.doesNotMatch(restore, /showToast/, 'a missing chat is not an error to announce');
});