import test from 'node:test'
import assert from 'node:assert/strict'
import { readSource } from './helpers.ts'
import {
  ADMIN_BRAND,
  crumbsForActiveRoute,
  resolveDocumentTitle,
  updateDocumentTitle,
} from '../src/layout/title-breadcrumb.ts'
import type { AdminMenuNode } from '../src/types/admin.ts'

function node(partial: Partial<AdminMenuNode> & { key: string; name: string }): AdminMenuNode {
  return { key: partial.key, name: partial.name, route: partial.route, children: partial.children }
}

const TREE: AdminMenuNode[] = [
  node({ key: 'account', name: '账号权限', children: [
    node({ key: 'admin_users', name: '用户管理', route: '/account/users' }),
  ] }),
  node({ key: 'top', name: '顶级页', route: '/top' }),
]

test('test_task_015_page_title_breadcrumb_normal_primary_path', () => {
  // 正常主路径：文档标题 = 页面标题 - 品牌。
  assert.equal(resolveDocumentTitle('用户管理'), '用户管理 - 数富AI')
  assert.equal(ADMIN_BRAND, '数富AI')
})

test('test_task_015_page_title_breadcrumb_normal_variant_input', () => {
  // 正常变体：分组内命中时返回 分组->页面 两级面包屑。
  const crumbs = crumbsForActiveRoute(TREE, '/account/users')
  assert.deepEqual(crumbs.map((c) => c.name), ['账号权限', '用户管理'])
  assert.equal(crumbs[1].route, '/account/users')
})

test('test_task_015_page_title_breadcrumb_normal_repeated_operation_is_idempotent', () => {
  // 正常重复：标题与面包屑解析稳定。
  assert.equal(resolveDocumentTitle('菜单管理'), resolveDocumentTitle('菜单管理'))
  assert.deepEqual(crumbsForActiveRoute(TREE, '/account/users'), crumbsForActiveRoute(TREE, '/account/users'))
})

test('test_task_015_page_title_breadcrumb_boundary_empty_input', () => {
  // 边界空值：无页面标题时文档标题仅品牌；空树/空激活路径返回空面包屑。
  assert.equal(resolveDocumentTitle(''), ADMIN_BRAND)
  assert.equal(resolveDocumentTitle('   '), ADMIN_BRAND)
  assert.deepEqual(crumbsForActiveRoute([], '/x'), [])
  assert.deepEqual(crumbsForActiveRoute(undefined, '/x'), [])
})

test('test_task_015_page_title_breadcrumb_boundary_single_item', () => {
  // 边界单元素：顶级叶子页命中返回自身单级面包屑。
  const crumbs = crumbsForActiveRoute(TREE, '/top')
  assert.equal(crumbs.length, 1)
  assert.equal(crumbs[0].name, '顶级页')
})

test('test_task_015_page_title_breadcrumb_boundary_limit_or_missing_field', () => {
  // 边界上限/缺字段：激活路径不在菜单树中时返回空，不伪造父级。
  assert.deepEqual(crumbsForActiveRoute(TREE, '/no/such/page'), [])
})

test('test_task_015_page_title_breadcrumb_invalid_input_rejected', () => {
  // 异常输入：非法页面标题按空处理；doc 缺省时更新静默失败不抛异常。
  assert.equal(resolveDocumentTitle(null as unknown as string), ADMIN_BRAND)
  assert.doesNotThrow(() => updateDocumentTitle('标题', null))
})

test('test_task_015_page_title_breadcrumb_dependency_failure_returns_actionable_message', () => {
  // 依赖失败：壳层接入文档标题同步与面包屑渲染。
  const layout = readSource('src/layout/AdminLayout.vue')
  assert.match(layout, /updateDocumentTitle/)
  assert.match(layout, /resolveDocumentTitle/)
  assert.match(layout, /crumbsForActiveRoute/)
  assert.match(layout, /el-breadcrumb/)
  assert.match(layout, /breadcrumbs\.length > 1/)
})