import test from 'node:test';
import assert from 'node:assert/strict';
import { readSnapshot, writeSnapshot, readTimetable, writeTimetable, readWeather, writeWeather, readSettings, saveSettings } from '../src/lib/storage.ts';

const data = { cityId: 1, stop: { id: 1, name: 'Швейная фабрика' }, mode: 'live', serviceDate: '2026-10-08', updatedAt: '2026-10-08T12:00:00+03:00', routes: [], alerts: [],
  departures: [{ id: '1:12:30', scheduledAt: '2026-10-08T12:30:00+03:00' }] };

test('offline snapshot is restored when IndexedDB is unavailable in a kiosk WebView', async () => {
  const values = new Map();
  globalThis.localStorage = { getItem: key => values.get(key) || null, setItem: (key, value) => values.set(key, value) };
  globalThis.indexedDB = { open: () => { throw new Error('IndexedDB unavailable'); } };
  await writeSnapshot(data);
  assert.deepEqual(await readSnapshot(1, 1), data);
  assert.equal(await readSnapshot(2, 1), null);
  assert.equal(await readSnapshot(1, 2), null);
});
test('damaged saved data is rejected, and total storage failure is reported to the UI', async () => {
  globalThis.localStorage = { getItem: () => '{invalid', setItem: () => { throw new Error('Quota exceeded'); } };
  globalThis.indexedDB = { open: () => { throw new Error('IndexedDB unavailable'); } };
  assert.equal(await readSnapshot(1, 1), null);
  await assert.rejects(writeSnapshot(data));
});
test('full timetable and weather survive storage fallback and stay isolated by city and stop', async () => {
  const values = new Map();
  globalThis.localStorage = { getItem: key => values.get(key) || null, setItem: (key, value) => values.set(key, value) };
  globalThis.indexedDB = { open: () => { throw new Error('IndexedDB unavailable'); } };
  const timetable = { version: 1, cityId: 1, cityName: 'Полоцк', stop: { id: 1, name: 'Швейная фабрика', direction: '' }, routes: [], holidays: [], calendarYears: [2026], updatedAt: data.updatedAt, expiresAt: '2026-10-15T12:00:00+03:00' };
  const weather = { cityId: 1, stopId: 1, updatedAt: data.updatedAt, observedAt: data.updatedAt, temperature: 12, apparentTemperature: 10, code: 3, isDay: true, windSpeed: 3, hourly: [] };
  await writeTimetable(timetable); await writeWeather(weather); await writeSnapshot(data);
  assert.deepEqual(await readTimetable(1, 1), timetable); assert.deepEqual(await readWeather(1, 1), weather); assert.deepEqual(await readSnapshot(1, 1), data);
  assert.equal(await readTimetable(1, 2), null); assert.equal(await readWeather(2, 1), null);
});
test('old theme preferences migrate safely and each theme retains its own accent', () => {
  const values = new Map([['ridebus-board-settings-v1', JSON.stringify({ colorScheme: 'cyan' })]]);
  globalThis.localStorage = { getItem: key => values.get(key) || null, setItem: (key, value) => values.set(key, value) };
  const old = readSettings();
  assert.equal(old.theme, 'dark'); assert.equal(old.colorScheme, 'cyan'); assert.equal(old.lightColorScheme, 'blue');
  saveSettings({ ...old, theme: 'light', lightColorScheme: 'crimson' });
  const saved = readSettings();
  assert.equal(saved.theme, 'light'); assert.equal(saved.lightColorScheme, 'crimson'); assert.equal(saved.colorScheme, 'cyan');
  values.set('ridebus-board-settings-v1', JSON.stringify({ theme: 'light', lightColorScheme: 'lime' }));
  assert.equal(readSettings().lightColorScheme, 'blue');
});