import test from 'node:test'
import assert from 'node:assert/strict'
import { readSource } from './helpers.ts'
import { firstVisiblePath } from '../src/router/helpers.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 NESTED: AdminMenuNode[] = [
  node({ key: 'a', name: '组A', children: [node({ key: 'a1', name: '无路由' })] }),
  node({ key: 'b', name: '组B', children: [
    node({ key: 'b1', name: '用户', route: '/account/users' }),
    node({ key: 'b2', name: '菜单', route: '/account/menus' }),
  ] }),
]

test('test_task_007_first_route_redirect_normal_primary_path', () => {
  // 正常主路径：深度优先返回第一个可见页面。
  assert.equal(firstVisiblePath(NESTED), '/account/users')
})

test('test_task_007_first_route_redirect_normal_variant_input', () => {
  // 正常变体：另一棵树返回其自身首个可见页，不依赖固定页。
  const tree: AdminMenuNode[] = [
    node({ key: 'x', name: '顶级', route: '/shop/list' }),
    node({ key: 'y', name: '后置', route: '/tasks/list' }),
  ]
  assert.equal(firstVisiblePath(tree), '/shop/list')
})

test('test_task_007_first_route_redirect_normal_repeated_operation_is_idempotent', () => {
  // 正常重复：结果稳定、不修改输入。
  const snapshot = JSON.stringify(NESTED)
  assert.equal(firstVisiblePath(NESTED), firstVisiblePath(NESTED))
  assert.equal(JSON.stringify(NESTED), snapshot)
})

test('test_task_007_first_route_redirect_boundary_empty_input', () => {
  // 边界空值：无任何菜单返回空串，不硬编码缺省页。
  assert.equal(firstVisiblePath([]), '')
  assert.equal(firstVisiblePath(undefined), '')
  assert.equal(firstVisiblePath(null), '')
})

test('test_task_007_first_route_redirect_boundary_single_item', () => {
  // 边界单元素：仅一个顶层页面时返回它。
  assert.equal(firstVisiblePath([node({ key: 's', name: '单页', route: '/solo' })]), '/solo')
})

test('test_task_007_first_route_redirect_boundary_limit_or_missing_field', () => {
  // 边界上限：只有无路由子项的分组不产出可见页。
  const onlyEmptyGroups: AdminMenuNode[] = [
    node({ key: 'g', name: '空组', children: [node({ key: 'c', name: '不可点' })] }),
  ]
  assert.equal(firstVisiblePath(onlyEmptyGroups), '')
})

test('test_task_007_first_route_redirect_invalid_input_rejected', () => {
  // 异常输入：畸形节点被跳过并继续找下一个可见页。
  const withMalformed: AdminMenuNode[] = [
    { key: 'bad', name: '畸形', route: '' } as unknown as AdminMenuNode,
    node({ key: 'ok', name: '可见', route: '/fine' }),
  ]
  assert.equal(firstVisiblePath(withMalformed), '/fine')
})

test('test_task_007_first_route_redirect_dependency_failure_returns_actionable_message', () => {
  // 依赖失败：根跳转由会话首个可见页驱动，不再硬编码 account/users。
  const router = readSource('src/router/index.ts')
  assert.equal(router.includes('redirect: \'/account/users\''), false, '禁止硬编码根跳转缺省页')
  assert.equal(router.includes('firstVisible'), true, '守卫必须使用会话首个可见页')
  const store = readSource('src/stores/admin-session.ts')
  assert.match(store, /firstVisible:/)
  assert.match(store, /firstVisiblePath/)
})