const { test } = require('node:test')
const assert = require('node:assert/strict')
const fs = require('node:fs')
const vm = require('node:vm')
const ts = require('typescript')
const React = require('react')
const { renderToStaticMarkup } = require('react-dom/server')

function compile(source, overrides = {}, globals = {}) {
  const exports = {}
  const code = ts.transpileModule(source, { compilerOptions: {
    module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2022, jsx: ts.JsxEmit.ReactJSX
  } }).outputText
  vm.runInNewContext(code, { exports, require: name => overrides[name] ?? require(name), ...globals })
  return exports
}

const widgets = compile(fs.readFileSync(require.resolve('../src/renderer/src/components/ChatWidgets.tsx'), 'utf8'), {
  '../i18n': { t: key => key, useLocaleRender() {} }, './chatAttachments': {}
})
const panelSource = ts.createSourceFile('WorkspaceQaPanel.tsx', fs.readFileSync(require.resolve('../src/renderer/src/features/workspace/WorkspaceQaPanel.tsx'), 'utf8'), ts.ScriptTarget.Latest, true, ts.ScriptKind.TSX)
const declarations = panelSource.statements.filter(node => ts.isFunctionDeclaration(node) && ['AiMessages', 'AgentMessages', 'TeacherMessages'].includes(node.name?.text))
const ProgressiveChatResponse = props => React.createElement('div', { 'data-reveal-start': props.message.revealStartedAt, 'data-collapsed': props.defaultCollapsed }, props.message.content)
const messages = compile(declarations.map(node => `export ${node.getText(panelSource)}`).join('\n'), {}, {
  t: key => key, useLocaleRender() {},
  ChatResponseSkeleton: widgets.ChatResponseSkeleton,
  ChatEmptyState: widgets.ChatEmptyState,
  ProgressiveChatResponse,
  MessageCopyButton: () => null,
  Bot: () => React.createElement('svg'), WandSparkles: () => React.createElement('svg')
})

for (const dark of [false, true]) {
  for (const mode of ['AiMessages', 'AgentMessages']) {
    test(`${mode} uses a three-line skeleton instead of a spinner (${dark ? 'dark' : 'light'})`, () => {
      const html = renderToStaticMarkup(messages[mode]({ dark, enabled: true, statusLoading: false, pending: true, messages: [] }))
      assert.match(html, /role="status"/)
      assert.equal((html.match(/<span class="h-2 /g) ?? []).length, 3)
      for (const width of ['w-full', 'w-[76%]', 'w-[52%]']) assert.ok(html.includes(width))
      assert.doesNotMatch(html, /animate-spin/)
      assert.match(html, /motion-reduce:animate-none/)
    })
  }
}

test('AI answer forwards reveal timing and collapse settings to the same presentation component', () => {
  const html = renderToStaticMarkup(messages.AiMessages({
    dark: true, pending: false, collapseSignal: 2,
    messages: [{ id: 'answer', role: 'assistant', content: '전체 답변입니다.', revealStartedAt: 1234, keepExpanded: true }]
  }))
  assert.match(html, /data-reveal-start="1234"/)
  assert.match(html, /data-collapsed="false"/)
  assert.match(html, /전체 답변/)
})

for (const dark of [false, true]) {
  for (const [mode, expected] of [
    ['AiMessages', /AI에게 질문할<br\/>내용을 입력하세요/],
    ['AgentMessages', /현재 모듈의 코드 수정이나 새 모듈 생성을 요청하세요\.<br\/>변경 내용은 확인 후 직접 적용합니다\./],
    ['TeacherMessages', /강사에게 문의할<br\/>내용을 입력하세요/]
  ]) {
    test(`empty ${mode} view uses the shared speech bubble (${dark ? 'dark' : 'light'})`, () => {
      const html = renderToStaticMarkup(messages[mode]({ dark, enabled: true, pending: false, messages: [] }))
      assert.match(html, expected)
      assert.match(html, /rounded-lg border px-8 py-5/)
      assert.match(html, /aria-hidden="true"[^>]*rotate-45 border-b border-r/)
      assert.doesNotMatch(html, /<button|role="status"/)
    })
  }
}

function chatHarness(revealInView) {
  const states = []
  const refs = []
  let stateIndex = 0
  let refIndex = 0
  let waits = 0
  const content = '첫 번째 문단입니다.\n\n두 번째 문단입니다.\n\n마지막 문단입니다.'
  const { useQaChat } = compile(fs.readFileSync(require.resolve('../src/renderer/src/features/workspace/useQaChat.ts'), 'utf8'), {
    react: {
      useEffect() {},
      useState(initial) {
        const index = stateIndex++
        if (!(index in states)) states[index] = typeof initial === 'function' ? initial() : initial
        return [states[index], value => { states[index] = typeof value === 'function' ? value(states[index]) : value }]
      },
      useRef(initial) { const index = refIndex++; return refs[index] ??= { current: initial } }
    },
    'socket.io-client': {}
  }, {
    URLSearchParams, AbortController, DOMException,
    fetch: async () => ({ ok: true, json: async () => ({ threadId: 'thread', content, message: { id: 'answer', content, createdAt: '2026-10-19T03:00:00Z' } }) }),
    window: { setTimeout(fn) { waits++; fn() } }
  })
  return {
    render() {
      stateIndex = 0; refIndex = 0
      return useQaChat({ accessToken: 'test', courseId: 'course', weekNumber: 1, revealInView, getFreshAccessToken: async () => 'test', onTitlebarNotice() {} })
    },
    content, waits: () => waits
  }
}

test('workspace AI stores the complete answer immediately and leaves animation to the view', async () => {
  const harness = chatHarness(true)
  await harness.render().sendQaMessage('조향 설정을 알려줘')
  const state = harness.render()
  const answer = state.visibleAiMessages.find(message => message.id === 'answer')
  assert.equal(answer.content, harness.content)
  assert.equal(typeof answer.revealStartedAt, 'number')
  assert.equal(answer.keepExpanded, true)
  assert.equal(state.aiPending, false)
  assert.equal(state.aiTypingMessageId, null)
  assert.equal(harness.waits(), 0)
})

test('the separate AI guide keeps its existing reveal mode unless explicitly opted in', async () => {
  const harness = chatHarness(false)
  await harness.render().sendQaMessage('질문')
  const state = harness.render()
  assert.equal(state.visibleAiMessages.find(message => message.id === 'answer').content, harness.content)
  assert.ok(harness.waits() > 0)
  assert.equal(state.aiTypingMessageId, null)
})