import { expect, test } from 'vitest';
import { isSaveConflict, parseBase } from './projectSync.js';

test('a save is fine when the server copy is no newer than what the device last saw', () => {
  expect(isSaveConflict({ stored: 100, base: 100 })).toBe(false);
  expect(isSaveConflict({ stored: 90, base: 100 })).toBe(false);
});

test('a save conflicts when another device saved after the one this device last saw', () => {
  expect(isSaveConflict({ stored: 200, base: 100 })).toBe(true);
});

test('first saves, unknown bases and "keep mine" never conflict', () => {
  expect(isSaveConflict({ stored: null, base: 100 })).toBe(false);
  expect(isSaveConflict({ stored: 200, base: null })).toBe(false);
  expect(isSaveConflict({ stored: 200, base: 100, force: true })).toBe(false);
});

test('reads the base header', () => {
  expect(parseBase('1700000000000')).toBe(1700000000000);
  expect(parseBase('')).toBeNull();
  expect(parseBase(undefined)).toBeNull();
  expect(parseBase('abc')).toBeNull();
});