import test from 'node:test'
import assert from 'node:assert/strict'
import { readSource } from './helpers.ts'
import {
  buildMenuManageTree,
  menuDeleteReason,
  parseMenuManageList,
} from '../src/pages/account/menu-manage-model.ts'

test('test_task_057_menu_delete_guard_normal_primary_path', () => {
  // 正常主路径：叶子菜单可删除（无原因）。
  const items = parseMenuManageList([{ id: 9, name: '叶子', column_key: 'leaf', parent_id: null }])
  assert.equal(menuDeleteReason(items[0]), undefined)
})

test('test_task_057_menu_delete_guard_normal_variant_input', () => {
  // 正常变体：空 children(未挂子树)也可删；有子树不可删。
  const items = parseMenuManageList([{ id: 1, name: '组', column_key: 'g', parent_id: null }])
  assert.equal(menuDeleteReason(items[0]), undefined)
  const tree = buildMenuManageTree(
    parseMenuManageList([
      { id: 1, name: '组', column_key: 'g', parent_id: null },
      { id: 2, name: '子', column_key: 'c', parent_id: 1 },
    ]),
  )
  assert.match(menuDeleteReason(tree[0]) || '', /子菜单/)
})

test('test_task_057_menu_delete_guard_normal_repeated_operation_is_idempotent', () => {
  // 正常重复：守卫纯函数不改输入、结果稳定。
  const tree = buildMenuManageTree(
    parseMenuManageList([
      { id: 1, name: '根', column_key: 'r', parent_id: null },
      { id: 2, name: '子', column_key: 'c', parent_id: 1 },
    ]),
  )
  assert.equal(menuDeleteReason(tree[0]), menuDeleteReason(tree[0]))
  assert.equal(tree[0].children?.length, 1)
})

test('test_task_057_menu_delete_guard_boundary_empty_input', () => {
  // 边界空值：空树可删；undefined 行视为无子树可删。
  assert.equal(menuDeleteReason(undefined as never), undefined)
})

test('test_task_057_menu_delete_guard_boundary_single_item', () => {
  // 边界单元素：单叶子可删。
  const items = parseMenuManageList([{ id: 5, name: 'only', column_key: 'only' }])
  assert.equal(menuDeleteReason(items[0]), undefined)
})

test('test_task_057_menu_delete_guard_boundary_limit_or_missing_field', () => {
  // 边界上限：多层子树同样不可删（按是否有 children 判定）。
  const tree = buildMenuManageTree(
    parseMenuManageList([
      { id: 1, name: '根', column_key: 'r', parent_id: null },
      { id: 2, name: '子', column_key: 'c', parent_id: 1 },
      { id: 3, name: '孙', column_key: 'l', parent_id: 2 },
    ]),
  )
  assert.ok(menuDeleteReason(tree[0]))
  const sub = tree[0].children?.[0]!
  assert.ok(menuDeleteReason(sub))
})

test('test_task_057_menu_delete_guard_invalid_input_rejected', () => {
  // 异常输入：父级带子给出与后端一致的可操作文案。
  const tree = buildMenuManageTree(
    parseMenuManageList([
      { id: 1, name: 'A', column_key: 'a', parent_id: null },
      { id: 2, name: 'B', column_key: 'b', parent_id: 1 },
    ]),
  )
  assert.match(menuDeleteReason(tree[0]) || '', /请先删除该菜单下的子菜单/)
})

test('test_task_057_menu_delete_guard_dependency_failure_returns_actionable_message', () => {
  // 依赖失败/删除走 adapter：DELETE permission-menus/{id}，页面二次确认后调用并刷新。
  const api = readSource('src/pages/account/menu-manage-api.ts')
  assert.match(api, /deleteMenu/)
  assert.match(api, /http\.delete/)
  assert.match(api, /permission-menus/)
  const page = readSource('src/pages/account/MenusPage.vue')
  assert.match(page, /deleteMenu/)
  assert.match(page, /menuDeleteReason|ElMessageBox/)
  assert.equal(/http\.delete|unwrap\(/.test(page), false, '页面不内联删除请求')
})