import test from 'node:test'
import assert from 'node:assert/strict'
import { readSource } from './helpers.ts'
import {
  initialCollapsed,
  isNarrowScreen,
  readCollapsePreference,
  SIDEBAR_COLLAPSED_WIDTH,
  SIDEBAR_EXPANDED_WIDTH,
  SIDEBAR_NARROW_THRESHOLD,
  sidebarPixelWidth,
  toggleCollapsed,
  writeCollapsePreference,
  type CollapseStorage,
} from '../src/layout/sidebar-collapse.ts'

function fakeStorage(entries: Record<string, string>, failing = false): CollapseStorage {
  return {
    getItem(key: string) {
      if (failing) throw new Error('storage down')
      return key in entries ? entries[key] : null
    },
    setItem(key: string, value: string) {
      if (failing) throw new Error('storage down')
      entries[key] = value
    },
  }
}

test('test_task_014_sidebar_responsive_behavior_normal_primary_path', () => {
  // 正常主路径：折叠开关反转状态。
  assert.equal(toggleCollapsed(false), true)
  assert.equal(toggleCollapsed(true), false)
})

test('test_task_014_sidebar_responsive_behavior_normal_variant_input', () => {
  // 正常变体：不同宽度判定窄屏与宽屏。
  assert.equal(isNarrowScreen(SIDEBAR_NARROW_THRESHOLD), true)
  assert.equal(isNarrowScreen(SIDEBAR_NARROW_THRESHOLD + 1), false)
  assert.equal(isNarrowScreen(1440), false)
})

test('test_task_014_sidebar_responsive_behavior_normal_repeated_operation_is_idempotent', () => {
  // 正常重复：偏好读写与宽度结果稳定。
  const storage = fakeStorage({})
  assert.equal(initialCollapsed(1000, storage), initialCollapsed(1000, storage))
  writeCollapsePreference(storage, true)
  assert.equal(readCollapsePreference(storage), true)
  assert.equal(readCollapsePreference(storage), true)
})

test('test_task_014_sidebar_responsive_behavior_boundary_empty_input', () => {
  // 边界空值：未知宽度/无存储不崩溃且回退展开。
  assert.equal(isNarrowScreen(0), false)
  assert.equal(initialCollapsed(0, null), false)
  assert.equal(readCollapsePreference(null), null)
})

test('test_task_014_sidebar_responsive_behavior_boundary_single_item', () => {
  // 边界单元素：单值持久化可读回。
  const storage = fakeStorage({ 'admin.sidebar.collapsed': 'false' })
  assert.equal(readCollapsePreference(storage), false)
  assert.equal(initialCollapsed(1024, storage), false)
})

test('test_task_014_sidebar_responsive_behavior_boundary_limit_or_missing_field', () => {
  // 边界上限/缺字段：非法持久化值按无偏好处理；像素宽与常量一致。
  const storage = fakeStorage({ 'admin.sidebar.collapsed': 'maybe' })
  assert.equal(readCollapsePreference(storage), null)
  assert.equal(sidebarPixelWidth(true), SIDEBAR_COLLAPSED_WIDTH)
  assert.equal(sidebarPixelWidth(false), SIDEBAR_EXPANDED_WIDTH)
  assert.equal(SIDEBAR_COLLAPSED_WIDTH < SIDEBAR_EXPANDED_WIDTH, true)
})

test('test_task_014_sidebar_responsive_behavior_invalid_input_rejected', () => {
  // 异常输入：存储读写失败被容忍，不阻断交互。
  const broken = fakeStorage({}, true)
  assert.equal(readCollapsePreference(broken), null)
  assert.doesNotThrow(() => writeCollapsePreference(broken, true))
  const fallback = fakeStorage({ 'admin.sidebar.collapsed': 'true' })
  assert.equal(initialCollapsed(1440, fallback), true, '持久化优先于视口宽度')
})

test('test_task_014_sidebar_responsive_behavior_dependency_failure_returns_actionable_message', () => {
  // 依赖失败：验收反馈移除收起菜单按钮；折叠逻辑改为恒定展开，窄屏媒体适配保留。
  const layout = readSource('src/layout/AdminLayout.vue')
  assert.ok(!layout.includes('toggleSidebar'), '收起按钮点击逻辑已移除')
  assert.ok(!layout.includes('sidebar-collapse'), '收起按钮已从布局移除')
  const css = readSource('src/styles/main.css')
  assert.match(css, /@media \(max-width: 820px\)/)
})