import test from 'node:test'
import assert from 'node:assert/strict'
import { readSource } from './helpers.ts'
import { parseMenuTree } from '../src/api/session-model.ts'

test('test_task_039_backend_tree_compat_normal_primary_path', () => {
  // 正常主路径：data.items 信封。
  const tree = parseMenuTree({ success: true, data: { items: [{ key: 'a', name: 'A', route: '/a' }] } })
  assert.equal(tree[0].route, '/a')
})

test('test_task_039_backend_tree_compat_normal_variant_input', () => {
  // 正常变体：data:{items}/无 data 的 {items}/裸数组三种信封均可解。
  assert.equal(parseMenuTree({ data: { items: [{ key: 'x', name: 'X' }] } }).length, 1)
  assert.equal(parseMenuTree({ success: true, items: [{ key: 'y', name: 'Y', route: '/y' }] }).length, 1)
  assert.equal(parseMenuTree([{ key: 'z', name: 'Z' }]).length, 1)
})

test('test_task_039_backend_tree_compat_normal_repeated_operation_is_idempotent', () => {
  // 正常重复：同一负载解析结果稳定且不改输入。
  const payload = { data: { items: [{ key: 'a', name: 'A', children: [{ key: 'b', name: 'B', route: '/b' }] }] } }
  assert.deepEqual(parseMenuTree(payload), parseMenuTree(payload))
})

test('test_task_039_backend_tree_compat_boundary_empty_input', () => {
  // 边界空值：空 items/空 data/空数组/非对象均按空树处理（区别于接口失败）。
  assert.deepEqual(parseMenuTree({ data: { items: [] } }), [])
  assert.deepEqual(parseMenuTree({}), [])
  assert.deepEqual(parseMenuTree(null as unknown as { items?: [] }), [])
  assert.deepEqual(parseMenuTree(undefined as unknown as { items?: [] }), [])
})

test('test_task_039_backend_tree_compat_boundary_single_item', () => {
  // 边界单元素：单分组/单页面两种最小树均可解析。
  assert.equal(parseMenuTree({ data: { items: [{ key: 'g', name: '组' }] } }).length, 1)
  assert.equal(parseMenuTree({ items: [{ key: 'p', name: '页', route: '/p' }] }).length, 1)
})

test('test_task_039_backend_tree_compat_boundary_limit_or_missing_field', () => {
  // 边界上限/缺字段：附加未知字段与缺省字段都不丢失/不崩溃。
  const tree = parseMenuTree({ items: [{ key: 'p', name: '页', route: '/p', sort: 3, icon: 'x', extra: { keep: true } }] })
  assert.equal((tree[0] as unknown as { extra: { keep: boolean } }).extra.keep, true)
})

test('test_task_039_backend_tree_compat_invalid_input_rejected', () => {
  // 异常输入：success=false 视为接口失败抛错（区别于“权限为空”）。
  assert.throws(() => parseMenuTree({ success: false, message: '会话失效', code: 401 }), /会话失效/)
})

test('test_task_039_backend_tree_compat_dependency_failure_returns_actionable_message', () => {
  // 依赖失败：会话适配 fetchAdminMenuTree 复用同一解析器兜住各信封边界。
  const session = readSource('src/api/session.ts')
  assert.match(session, /parseMenuTree/)
  const model = readSource('src/api/session-model.ts')
  assert.match(model, /export function parseMenuTree/)
  assert.match(model, /Array\.isArray/)
})