import { test } from 'node:test'
import assert from 'node:assert/strict'
import {
  formatNotificationTime,
  formatUnreadBadge,
  groupNotificationsByDay,
  hasNewNotification,
  readLastNotifiedId,
  writeLastNotifiedId,
} from '../src/layout/notification-bell-model.ts'

function createStorage() {
  const store = new Map<string, string>()
  return {
    getItem: (key: string) => (store.has(key) ? (store.get(key) as string) : null),
    setItem: (key: string, value: string) => {
      store.set(key, String(value))
    },
    removeItem: (key: string) => {
      store.delete(key)
    },
  }
}

function setupWindow() {
  const localStorage = createStorage()
  const globalScope = globalThis as Record<string, unknown>
  const previous = globalScope.window
  globalScope.window = { localStorage }
  return {
    localStorage,
    restore: () => {
      globalScope.window = previous
    },
  }
}

test('test_未读徽标：0 与非法值不显示、超过 99 显示 99+', () => {
  assert.equal(formatUnreadBadge(0), '')
  assert.equal(formatUnreadBadge(-3), '')
  assert.equal(formatUnreadBadge(null), '')
  assert.equal(formatUnreadBadge(undefined), '')
  assert.equal(formatUnreadBadge(Number.NaN), '')
  assert.equal(formatUnreadBadge(1), '1')
  assert.equal(formatUnreadBadge(99), '99')
  assert.equal(formatUnreadBadge(100), '99+')
})

test('test_新通知判定：latestId 需大于已提醒 id', () => {
  assert.equal(hasNewNotification(0, 0), false)
  assert.equal(hasNewNotification(null, 5), false)
  assert.equal(hasNewNotification(5, 5), false)
  assert.equal(hasNewNotification(4, 5), false)
  assert.equal(hasNewNotification(6, 5), true)
  assert.equal(hasNewNotification(6, 0), true)
  assert.equal(hasNewNotification(6, null), true)
})

test('test_已提醒 id 按管理员读写并容错', () => {
  setupWindow()
  assert.equal(readLastNotifiedId(7), 0, '未写入时按 0 处理')

  writeLastNotifiedId(7, 88)
  assert.equal(readLastNotifiedId(7), 88)
  assert.equal(readLastNotifiedId(8), 0, '不同管理员互不影响')

  writeLastNotifiedId(7, 0)
  assert.equal(readLastNotifiedId(7), 88, '非法 id 不覆盖已有值')

  window.localStorage.setItem('admin-notification:last-notified-id:7', 'broken')
  assert.equal(readLastNotifiedId(7), 0, '损坏值按 0 处理')

  assert.equal(readLastNotifiedId(null), readLastNotifiedId('0'), '空 uid 归一为 0 号键')
})

test('test_时间展示：今天/昨天/更早', () => {
  const now = new Date(2026, 8, 13, 15, 30)
  assert.equal(formatNotificationTime(new Date(2026, 8, 13, 9, 5).toISOString(), now), '09:05')
  assert.equal(formatNotificationTime(new Date(2026, 8, 12, 23, 59).toISOString(), now), '昨天 23:59')
  assert.equal(formatNotificationTime(new Date(2026, 8, 1, 8, 0).toISOString(), now), '09-01 08:00')
  assert.equal(formatNotificationTime(null, now), '')
  assert.equal(formatNotificationTime('not-a-date', now), '')
})

test('test_按年月日分组：今天/昨天/更早，组内保持原顺序', () => {
  const now = new Date(2026, 8, 13, 15, 30)
  const items = [
    { id: 4, createdAt: new Date(2026, 8, 13, 15, 0).toISOString() },
    { id: 3, createdAt: new Date(2026, 8, 13, 9, 0).toISOString() },
    { id: 2, createdAt: new Date(2026, 8, 12, 23, 0).toISOString() },
    { id: 1, createdAt: new Date(2026, 8, 1, 8, 0).toISOString() },
  ]

  const groups = groupNotificationsByDay(items, now)

  assert.equal(groups.length, 3)
  assert.deepEqual(
    groups.map((group) => [group.day, group.label]),
    [
      ['2026-09-13', '今天'],
      ['2026-09-12', '昨天'],
      ['2026-09-01', '2026年9月1日'],
    ],
  )
  assert.deepEqual(
    groups[0].items.map((item) => item.id),
    [4, 3],
    '同一天的多条合为一组且保持倒序',
  )
})

test('test_按年月日分组：时间缺失/非法归入未知时间组', () => {
  const now = new Date(2026, 8, 13, 15, 30)
  const groups = groupNotificationsByDay(
    [
      { id: 2, createdAt: null },
      { id: 1, createdAt: 'not-a-date' },
    ],
    now,
  )

  assert.equal(groups.length, 1)
  assert.equal(groups[0].day, '')
  assert.equal(groups[0].label, '未知时间')
  assert.deepEqual(
    groups[0].items.map((item) => item.id),
    [2, 1],
  )
})