/**
 * 15-persistence: localStorage 持久化
 */
import { describe, it, expect, beforeEach } from 'vitest'
import { store } from '../../src/composables/useStore'

describe('15-persistence — localStorage 持久化', () => {
  beforeEach(() => {
    localStorage.clear()
  })

  it('get 带 fallback 返回默认值', () => {
    const val = store.get('nonexistent', { hello: 'world' })
    expect(val).toEqual({ hello: 'world' })
  })

  it('set 后 get 返回正确值', () => {
    store.set('test-key', { a: 1, b: [2, 3] })
    const val = store.get('test-key', null)
    expect(val).toEqual({ a: 1, b: [2, 3] })
  })

  it('remove 后 get 返回 fallback', () => {
    store.set('test-key', 'value')
    store.remove('test-key')
    const val = store.get('test-key', 'fallback')
    expect(val).toBe('fallback')
  })

  it('clearAll 清除所有带前缀的键', () => {
    store.set('key1', 'a')
    store.set('key2', 'b')
    localStorage.setItem('other-key', 'keep-me')
    store.clearAll()
    expect(store.get('key1', null)).toBeNull()
    expect(store.get('key2', null)).toBeNull()
    expect(localStorage.getItem('other-key')).toBe('keep-me')
  })

  it('损坏数据回退默认值', () => {
    localStorage.setItem(store.PREFIX + 'bad', '{invalid json')
    const val = store.get('bad', { ok: true })
    expect(val).toEqual({ ok: true })
  })
})