import test from 'node:test'
import assert from 'node:assert/strict'
import { readSource } from './helpers.ts'
import { firstVisiblePath } from '../src/router/helpers.ts'

test('test_task_034_unauthorized_fallback_normal_primary_path', () => {
  // 正常主路径：越权页面回退到菜单树首个可见页面。
  const tree = [{ key: 'g', name: '组', children: [{ key: 'users', name: '用户管理', route: '/account/users' }] }]
  assert.equal(firstVisiblePath(tree), '/account/users')
})

test('test_task_034_unauthorized_fallback_normal_variant_input', () => {
  // 正常变体：多个可路由页面时取深度优先的首个。
  const tree = [
    { key: 'a', name: 'A', route: '/a', sort: 9 },
    { key: 'b', name: 'B', route: '/b', sort: 1 },
  ]
  assert.equal(firstVisiblePath(tree), '/a', '前端保序，不按 sort 重排')
})

test('test_task_034_unauthorized_fallback_normal_repeated_operation_is_idempotent', () => {
  // 正常重复：查找不修改树、结果稳定。
  const tree = [{ key: 'g', name: '组', children: [{ key: 'p', name: '页', route: '/p' }] }]
  assert.equal(firstVisiblePath(tree), firstVisiblePath(tree))
})

test('test_task_034_unauthorized_fallback_boundary_empty_input', () => {
  // 边界空值：无任何可见页面时回退空串，由守卫回根路由空态。
  assert.equal(firstVisiblePath([]), '')
  assert.equal(firstVisiblePath(null), '')
})

test('test_task_034_unauthorized_fallback_boundary_single_item', () => {
  // 边界单元素：单个页面即回退目标。
  assert.equal(firstVisiblePath([{ key: 's', name: '单', route: '/solo' }]), '/solo')
})

test('test_task_034_unauthorized_fallback_boundary_limit_or_missing_field', () => {
  // 边界上限/缺字段：深层叶页面也被当作回退目标。
  const tree = [{ key: 'g', name: '组', children: [{ key: 'g2', name: '子组', children: [{ key: 'deep', name: '深', route: '/deep' }] }] }]
  assert.equal(firstVisiblePath(tree), '/deep')
})

test('test_task_034_unauthorized_fallback_invalid_input_rejected', () => {
  // 异常输入：畸形节点（无 route 无 children）被跳过，不影响回退目标。
  const tree = [{ key: 'bad', name: '坏' }, { key: 'ok', name: '好', route: '/ok' }]
  assert.equal(firstVisiblePath(tree), '/ok')
})

test('test_task_034_unauthorized_fallback_dependency_failure_returns_actionable_message', () => {
  // 依赖失败：路由守卫对越权页以首个可见页/根路由作为回退目标。
  const router = readSource('src/router/index.ts')
  assert.match(router, /session\.firstVisible\s*\|\|\s*'\/'/, '越权页回退首个可见页，全无则根路由')
  assert.match(router, /isRouteAllowed/)
})