import test from 'node:test'
import assert from 'node:assert/strict'
import { readSource } from './helpers.ts'
import {
  ADMIN_THEME,
  ADMIN_THEME_KEYS,
  contrastRatio,
  isDarkSurface,
  relativeLuminance,
  tokenHex,
} from '../src/styles/theme.ts'

// module 13 task 241：蓝白浅色基线翻转。旧「深色侧栏 + indigo」token 需整体替换为
// admin.html 末层（L4478）生效值：浅色侧栏、蓝灰主色 #4f78a5、淡蓝内容底。

test('test_task_241_baseline_normal_primary_path', () => {
  // 正常主路径：token 命中 admin.html 蓝白浅色基线的关键 hex。
  assert.equal(ADMIN_THEME.sidebar, '#f8fbfe', '侧栏顶色应为浅蓝白')
  assert.equal(ADMIN_THEME.sidebarDeep, '#edf3f9', '侧栏底/加深色应为浅蓝灰')
  assert.equal(ADMIN_THEME.primary, '#4f78a5', '主色应为蓝灰（非旧 indigo）')
  assert.equal(ADMIN_THEME.primarySoft, '#e7f0f8', '主色软底应为浅蓝')
  assert.equal(ADMIN_THEME.bg, '#f4f7fb', '内容底应为淡蓝')
  assert.equal(ADMIN_THEME.text, '#24384d', '正文应为深蓝灰')
})

test('test_task_241_baseline_normal_variant_input', () => {
  // 正常变体：侧栏与内容区均为浅色（翻转核心语义），不再要求侧栏为暗。
  assert.equal(isDarkSurface(ADMIN_THEME.sidebar), false, '侧栏顶色必须为浅色')
  assert.equal(isDarkSurface(ADMIN_THEME.sidebarDeep), false, '侧栏底必须为浅色')
  assert.equal(isDarkSurface(ADMIN_THEME.bg), false, '内容区必须为浅色')
  assert.equal(isDarkSurface(ADMIN_THEME.border), false, '边框须为亮面中性色')
})

test('test_task_241_baseline_normal_repeated_operation_is_idempotent', () => {
  // 正常重复：浅色判定与对比度幂等。
  assert.equal(isDarkSurface(ADMIN_THEME.sidebar), isDarkSurface(ADMIN_THEME.sidebar))
  assert.equal(relativeLuminance(ADMIN_THEME.bg), relativeLuminance(ADMIN_THEME.bg))
})

test('test_task_241_baseline_boundary_empty_input', () => {
  // 边界：token 键集合不变（防丢语义键），全部 #rrggbb。
  assert.ok(ADMIN_THEME_KEYS.length >= 7, '必须覆盖侧栏/内容区/正文等核心语义面')
  for (const key of ADMIN_THEME_KEYS) {
    assert.match(ADMIN_THEME[key], /^#[0-9a-fA-F]{6}$/, `${key} 须为 #rrggbb`)
  }
})

test('test_task_241_baseline_boundary_single_item', () => {
  // 边界单元素：侧栏与内容区仍是两个可区分的浅色面（不得同色）。
  assert.notEqual(ADMIN_THEME.sidebar, ADMIN_THEME.bg, '侧栏与内容底必须可区分')
  assert.notEqual(ADMIN_THEME.sidebar, ADMIN_THEME.sidebarDeep)
  assert.equal(isDarkSurface(ADMIN_THEME.sidebar), false)
})

test('test_task_241_baseline_boundary_limit_or_missing_field', () => {
  // 边界上限：正文/次要文本在浅色底上满足 WCAG AA；CSS 变量名映射稳定。
  assert.ok(contrastRatio(ADMIN_THEME.text, ADMIN_THEME.bg) >= 4.5, '正文/内容区需 ≥4.5')
  assert.ok(contrastRatio(ADMIN_THEME.primary, ADMIN_THEME.bg) >= 3.0, '主色按钮/内容区 ≥3')
  assert.ok(contrastRatio(ADMIN_THEME.muted, ADMIN_THEME.bg) >= 3.0, '次要文本 ≥3')
  assert.equal(tokenHex('sidebar'), '#f8fbfe')
})

test('test_task_241_baseline_invalid_input_rejected', () => {
  // 异常：theme.ts 不得残留旧 indigo 主色与深色侧栏值（防只改一半漂移）。
  const ts = readSource('src/styles/theme.ts')
  assert.equal(/#6366f1/.test(ts), false, 'theme.ts 不得残留旧 indigo #6366f1')
  assert.equal(/#192132|#121827/.test(ts), false, 'theme.ts 不得残留旧深色侧栏')
  assert.throws(() => tokenHex('unknown' as never), /未知 Admin 主题 token/)
})

test('test_task_241_baseline_dependency_failure_returns_actionable_message', () => {
  // 依赖失败：theme.ts 与 main.css 渲染变量交叉校验一致（防双源漂移）。
  const css = readSource('src/styles/main.css')
  const missing = ADMIN_THEME_KEYS.filter((key) => {
    const tokenVar = `--admin-${key.replace(/[A-Z]/g, (c) => `-${c.toLowerCase()}`)}`
    return !css.includes(`${tokenVar}: ${ADMIN_THEME[key]}`)
  })
  assert.deepEqual(missing, [], `theme.ts 与 main.css 不一致，缺失变量: ${missing.join(', ')}`)
  assert.equal(/@import/.test(css), false, 'main.css 不得 @import 旧后台整份样式')
})