// @vitest-environment jsdom
import { afterEach, describe, expect, it, vi } from 'vitest'
import { cleanup, fireEvent, render, screen } from '@testing-library/react'
import type { ConversationSnapshot, SessionId, SessionListState } from '@deepseek-ai/dsh-client-runtime/client'
import { PendingWait } from '@deepseek-ai/dsh-client-runtime/client'
import type { RpcReceipt } from '@deepseek-ai/dsh-client-connection/client'
import { RpcId } from '@deepseek-ai/dsh-client-connection/client'
import type { SnapshotSelectorHook } from '@deepseek-ai/dsh-client-ui-slots'
import { PendingQuestion } from '../src/client/contract/slots.ts'
import {
  QuestionComposer, parseQuestionTitle, parseRecommendedLabel,
} from '../src/client/QuestionComposer.tsx'

afterEach(cleanup)

const SID = 's1' as SessionId

/** Framework standard-kit stubs: the composer consumes none of them, the
 *  composed props type mandates their delivery (framework hooks are plain
 *  stubs per the client testing discipline). */
const kit = {
  sessionId: SID,
  useSession: (() => { throw new Error('unused') }) as unknown as SnapshotSelectorHook<ConversationSnapshot>,
  useSessions: (() => { throw new Error('unused') }) as unknown as SnapshotSelectorHook<SessionListState>,
}

const QUESTIONS = [
  {
    id: 'profile', header: '偏好', question: '选择候选人类型',
    detail: '按当前空缺岗位的优先级选择。',
    options: [
      { label: '工程落地型 (Recommended)', description: '优先工程交付。' },
      { label: '研究潜力型', description: '优先研究能力。' },
    ],
  },
  {
    id: 'detail', question: '补充你的要求',
  },
  {
    id: 'signals', question: '选择重要信号（可多选）', multiSelect: true,
    options: [{ label: '系统设计' }, { label: '代码质量' }, { label: '产品判断' }],
  },
]

/** Carrier fixture: a real PendingWait over a scripted respond carrier. */
function wait(rpcId = 'question-1', respond = vi.fn(() => Promise.resolve<RpcReceipt>({ accepted: true }))) {
  const carrier = new PendingWait(
    'question', RpcId(rpcId), SID, { questions: QUESTIONS } as PendingWait<'question'>['payload'], respond)
  return { carrier, respond }
}

/** The client-response envelope respond must have received for an answer batch. */
function answeredEnvelope(rpcId: string, answers: object[]) {
  return {
    type: 'client-response', rpcId: RpcId(rpcId),
    result: { ok: true, value: { sessionId: SID, answer: { answers } } },
  }
}

describe('QuestionComposer', () => {
  it('collects single, custom, and multi-select answers before one batch submit', () => {
    const { carrier, respond } = wait()
    render(<QuestionComposer matched={carrier} interactions={[carrier]} {...kit} />)

    expect(screen.getByText('1 / 3')).toBeTruthy()
    expect(screen.getByText('推荐')).toBeTruthy()
    expect(screen.getByText('工程落地型')).toBeTruthy()
    expect(screen.getByText('按当前空缺岗位的优先级选择。')).toBeTruthy()
    fireEvent.keyDown(screen.getByRole('radio', { name: /工程落地型/ }), { key: 'Enter' })
    expect(respond).not.toHaveBeenCalled()
    fireEvent.click(screen.getByRole('radio', { name: /工程落地型/ }))

    expect(screen.getByText('2 / 3')).toBeTruthy()
    // detail is per-question: the second question carries none.
    expect(screen.queryByText('按当前空缺岗位的优先级选择。')).toBeNull()
    expect(screen.queryByRole('button', { name: '填写答案' })).toBeNull()
    const custom = screen.getByPlaceholderText('输入你的答案')
    fireEvent.change(custom, { target: { value: '要能独立排查线上问题' } })
    fireEvent.keyDown(custom, { key: 'Enter' })

    expect(screen.getByText('3 / 3')).toBeTruthy()
    expect(screen.getByText('选择重要信号')).toBeTruthy()
    expect(screen.getByText('可多选')).toBeTruthy()
    expect(screen.queryByText('（可多选）')).toBeNull()
    fireEvent.click(screen.getByRole('checkbox', { name: '系统设计' }))
    fireEvent.click(screen.getByRole('checkbox', { name: '系统设计' }))
    fireEvent.click(screen.getByRole('checkbox', { name: '系统设计' }))
    fireEvent.click(screen.getByRole('checkbox', { name: '代码质量' }))
    fireEvent.keyDown(screen.getByRole('checkbox', { name: '代码质量' }), { key: 'Enter' })

    // The domain face encoded the whole batch into one carrier envelope.
    expect(respond).toHaveBeenCalledWith(answeredEnvelope('question-1', [
      { id: 'profile', selected: ['工程落地型 (Recommended)'] },
      { id: 'detail', selected: [], custom: '要能独立排查线上问题' },
      { id: 'signals', selected: ['系统设计', '代码质量'] },
    ]))
    expect((screen.getByRole('button', { name: '正在提交…' }) as HTMLButtonElement).disabled).toBe(true)
  })

  it('skips individual questions without discarding earlier answers', () => {
    const { carrier, respond } = wait()
    render(<QuestionComposer matched={carrier} interactions={[carrier]} {...kit} />)

    expect((screen.getByText('下一题').closest('button') as HTMLButtonElement).disabled).toBe(true)
    fireEvent.click(screen.getByRole('radio', { name: '研究潜力型' }))
    expect(screen.getByText('2 / 3')).toBeTruthy()
    fireEvent.click(screen.getByRole('button', { name: '跳过本题' }))
    expect(screen.getByText('3 / 3')).toBeTruthy()
    fireEvent.click(screen.getByRole('button', { name: '跳过本题' }))

    expect(respond).toHaveBeenCalledWith(answeredEnvelope('question-1', [
      { id: 'profile', selected: ['研究潜力型'] },
      { id: 'detail', selected: [] },
      { id: 'signals', selected: [] },
    ]))
  })

  it('keeps IME Enter inside the custom input until composition finishes', () => {
    const { carrier, respond } = wait()
    render(<QuestionComposer matched={carrier} interactions={[carrier]} {...kit} />)

    fireEvent.click(screen.getByRole('radio', { name: '研究潜力型' }))
    const custom = screen.getByPlaceholderText('输入你的答案')
    fireEvent.change(custom, { target: { value: '中文输入' } })

    fireEvent.keyDown(custom, { key: 'Enter', isComposing: true })
    expect(screen.getByText('2 / 3')).toBeTruthy()
    expect(respond).not.toHaveBeenCalled()

    fireEvent.keyDown(custom, { key: 'Enter', keyCode: 229 })
    expect(screen.getByText('2 / 3')).toBeTruthy()
    expect(respond).not.toHaveBeenCalled()

    fireEvent.keyDown(custom, { key: 'Enter' })
    expect(screen.getByText('3 / 3')).toBeTruthy()
  })

  it('opens custom input, reports missing skipped answers, and supports header navigation', () => {
    const { carrier, respond } = wait()
    render(<QuestionComposer matched={carrier} interactions={[carrier]} {...kit} />)

    fireEvent.click(screen.getByRole('button', { name: '其他，请填写自定义答案' }))
    expect(screen.getByPlaceholderText('输入你的答案')).toBeTruthy()
    fireEvent.click(screen.getByRole('radio', { name: '工程落地型' }))
    const emptyCustom = screen.getByPlaceholderText('输入你的答案')
    fireEvent.keyDown(emptyCustom, { key: 'Enter', shiftKey: true })
    expect(screen.getByText('2 / 3')).toBeTruthy()
    fireEvent.keyDown(emptyCustom, { key: 'Enter' })
    expect(screen.getByText('请选择一个选项或填写自定义答案。')).toBeTruthy()

    fireEvent.click(screen.getByLabelText('下一题'))
    fireEvent.click(screen.getByRole('checkbox', { name: '产品判断' }))
    fireEvent.click(screen.getByRole('button', { name: '提交' }))
    expect(screen.getByText('请先完成这道问题。')).toBeTruthy()
    expect(screen.getByText('2 / 3')).toBeTruthy()
    fireEvent.click(screen.getByLabelText('上一题'))
    expect(screen.getByText('1 / 3')).toBeTruthy()
    expect(respond).not.toHaveBeenCalled()
  })

  it('surfaces cancellation failures: rejected receipt text and raw transport reasons', async () => {
    const respond = vi.fn()
      .mockResolvedValueOnce({ accepted: false, reason: 'bad-response' })
      .mockRejectedValueOnce(new Error('第二次取消失败'))
    const { carrier } = wait('question-1', respond)
    render(<QuestionComposer matched={carrier} interactions={[carrier]} {...kit} />)

    // Receipt rejection surfaces through the domain face's thrown message.
    fireEvent.click(screen.getByRole('button', { name: '放弃整组问题' }))
    expect(await screen.findByText('question cancellation rejected: bad-response')).toBeTruthy()
    expect((screen.getByRole('button', { name: '跳过本题' }) as HTMLButtonElement).disabled).toBe(false)

    fireEvent.click(screen.getByRole('button', { name: '放弃整组问题' }))
    expect(await screen.findByText('第二次取消失败')).toBeTruthy()
  })

  it('surfaces transport rejection and resets local drafts for a different request', async () => {
    const respond = vi.fn()
      .mockRejectedValueOnce(new Error('网络中断'))
      .mockRejectedValueOnce('字符串错误')
    const first = wait('first', respond)
    const view = render(<QuestionComposer matched={first.carrier} interactions={[first.carrier]} {...kit} />)

    fireEvent.click(screen.getByRole('radio', { name: /研究潜力型/ }))
    expect(screen.getByText('2 / 3')).toBeTruthy()
    const second = wait('second', respond)
    view.rerender(<QuestionComposer matched={second.carrier} interactions={[second.carrier]} {...kit} />)
    expect(screen.getByRole('radio', { name: /研究潜力型/ }).getAttribute('aria-checked')).toBe('false')

    fireEvent.click(screen.getByRole('radio', { name: /工程落地型/ }))
    const custom = screen.getByPlaceholderText('输入你的答案')
    fireEvent.change(custom, { target: { value: 'x' } })
    fireEvent.keyDown(custom, { key: 'Enter' })
    fireEvent.click(screen.getByRole('checkbox', { name: '系统设计' }))
    fireEvent.click(screen.getByRole('button', { name: '提交' }))
    expect(await screen.findByText('网络中断')).toBeTruthy()
    expect((screen.getByRole('button', { name: '提交' }) as HTMLButtonElement).disabled).toBe(false)

    fireEvent.click(screen.getByRole('button', { name: '提交' }))
    expect(await screen.findByText('字符串错误')).toBeTruthy()
  })

  it('same-key carrier replacement (baseline replay) keeps drafts', () => {
    const first = wait('same-id')
    const view = render(<QuestionComposer matched={first.carrier} interactions={[first.carrier]} {...kit} />)
    fireEvent.click(screen.getByRole('radio', { name: /研究潜力型/ }))
    expect(screen.getByText('2 / 3')).toBeTruthy()
    // Replay mints a NEW carrier for the same request; same key = no remount.
    const replayed = wait('same-id')
    view.rerender(<QuestionComposer matched={replayed.carrier} interactions={[replayed.carrier]} {...kit} />)
    expect(screen.getByText('2 / 3')).toBeTruthy()
  })
})

describe('PendingQuestion domain face', () => {
  it('encodes the answer batch into the ok envelope and throws on a rejected receipt', async () => {
    const respond = vi.fn()
      .mockResolvedValueOnce({ accepted: true })
      .mockResolvedValueOnce({ accepted: false, reason: 'not-pending' })
    const question = new PendingQuestion(wait('rq', respond).carrier)
    const batch = { answers: [{ id: 'mode', selected: ['Fast'] }] }
    await expect(question.answer(batch)).resolves.toBeUndefined()
    expect(respond).toHaveBeenCalledWith(answeredEnvelope('rq', batch.answers))
    await expect(question.answer(batch)).rejects.toThrow(/question response rejected: not-pending/)
  })

  it('encodes cancellation as the cancelled error envelope and throws on a rejected receipt', async () => {
    const respond = vi.fn()
      .mockResolvedValueOnce({ accepted: true })
      .mockResolvedValueOnce({ accepted: false, reason: 'bad-response' })
    const question = new PendingQuestion(wait('rc', respond).carrier)
    await expect(question.cancel()).resolves.toBeUndefined()
    expect(respond).toHaveBeenCalledWith({
      type: 'client-response', rpcId: RpcId('rc'),
      result: {
        ok: false,
        error: { code: 'cancelled', message: 'the user closed this question request', details: {} },
      },
    })
    await expect(question.cancel()).rejects.toThrow(/question cancellation rejected: bad-response/)
  })

  it('forwards key and questions from the carrier', () => {
    const question = new PendingQuestion(wait('rk').carrier)
    expect(question.key).toBe('q:rk')
    expect(question.questions).toBe(wait('rk').carrier.payload.questions)
  })
})

describe('parseRecommendedLabel', () => {
  it('recognizes English and Chinese suffixes without changing ordinary labels', () => {
    expect(parseRecommendedLabel('Fast (Recommended)')).toEqual({ label: 'Fast', recommended: true })
    expect(parseRecommendedLabel('稳妥（推荐）')).toEqual({ label: '稳妥', recommended: true })
    expect(parseRecommendedLabel('稳妥 (推荐)')).toEqual({ label: '稳妥', recommended: true })
    expect(parseRecommendedLabel('Plain')).toEqual({ label: 'Plain', recommended: false })
  })
})

describe('parseQuestionTitle', () => {
  it('removes Chinese and ASCII multi-select suffixes', () => {
    expect(parseQuestionTitle('选择信号（可多选）')).toBe('选择信号')
    expect(parseQuestionTitle('选择信号 (可多选)')).toBe('选择信号')
    expect(parseQuestionTitle('选择信号')).toBe('选择信号')
  })
})
