import { act, fireEvent, render, screen, waitFor } from '@testing-library/react';
import { beforeEach, describe, expect, it, vi } from 'vitest';
import { TeacherChatPanel } from '@/pages/Chat/TeacherChatPanel';
import type { TeacherDefinition, TeacherTopic } from '../../shared/coding-teacher';
const api = vi.hoisted(() => ({
  config: vi.fn(),
  preview: vi.fn(),
  list: vi.fn(),
  create: vi.fn(),
  read: vi.fn(),
  send: vi.fn(),
  cancel: vi.fn(),
  save: vi.fn(),
  events: vi.fn(),
}));
vi.mock('@/lib/coding-teacher', () => ({
  teacherApi: api,
  teacherTopicsPath: (p: string, s: string) => p + '/' + s,
}));
const definition: TeacherDefinition = {
  schema_version: 1,
  teacher_id: 'coding-teacher',
  name: '老师',
  description: '',
  avatar_id: 'avatar-01',
  welcome_message: '欢迎',
  suggested_questions: [],
  system_prompt: '教学',
  skills: [],
  model: { model_id: 'qwen', reasoning_choice: { mode: 'default' } },
  limits: { max_input_tokens: 8000, max_output_tokens: 1500 },
};
function topic(id: string): TeacherTopic {
  return {
    schemaVersion: 1,
    revision: 1,
    id,
    accountId: 'user',
    projectId: 'p',
    sourceConversationId: 'c',
    definition,
    version: 1,
    createdAt: '2026-09-22',
    updatedAt: '2026-09-22',
    requests: [],
  };
}
const first = topic('first'),
  second = topic('second');
let streams: Map<string, EventTarget & { close: ReturnType<typeof vi.fn> }>;
beforeEach(() => {
  vi.resetAllMocks();
  streams = new Map();
  api.config.mockResolvedValue({ enabled: true, published_version: 1, revision: 1, definition });
  api.list.mockResolvedValue({
    items: [
      { id: 'first', title: '第一个' },
      { id: 'second', title: '第二个' },
    ],
    lastSelectedTopicId: 'first',
  });
  api.read.mockImplementation(async (_base, id) =>
    id === 'first' ? structuredClone(first) : structuredClone(second)
  );
  api.create.mockResolvedValue(first);
  api.events.mockImplementation(async (_base, id) => {
    const stream = Object.assign(new EventTarget(), { close: vi.fn() });
    streams.set(id, stream);
    return stream;
  });
});
async function ready() {
  await waitFor(() =>
    expect(screen.getByRole('combobox', { name: '老师话题' })).toHaveValue('first')
  );
  await waitFor(() => expect(streams.has('first')).toBe(true));
}
describe('teacher side chat', () => {
  it('retains failed input and retries with the same request id, then appends a reply only on click', async () => {
    const bringBack = vi.fn();
    api.send
      .mockRejectedValueOnce(new Error('网络暂不可用'))
      .mockImplementationOnce(async (_base, _id, input) => ({
        ...first,
        revision: 3,
        requests: [
          {
            id: input.requestId,
            text: input.text,
            references: [],
            createdAt: 'now',
            sourceCursor: { workerGeneration: 1, seq: 1 },
            sourceCapturedAt: 'now',
            includedSourceMessageIds: [],
            omittedMessages: 0,
            status: 'completed',
            response: '教学回答',
          },
        ],
      }));
    render(<TeacherChatPanel projectId="p" sourceId="c" onBringBack={bringBack} />);
    await ready();
    fireEvent.change(screen.getByLabelText('向老师提问'), { target: { value: '解释代码' } });
    fireEvent.click(screen.getByRole('button', { name: '提问', exact: true }));
    await screen.findByText('网络暂不可用');
    expect(screen.getByLabelText('向老师提问')).toHaveValue('解释代码');
    fireEvent.click(screen.getByRole('button', { name: '提问', exact: true }));
    await screen.findByText('教学回答');
    expect(api.send.mock.calls[0][2].requestId).toBe(api.send.mock.calls[1][2].requestId);
    expect(bringBack).not.toHaveBeenCalled();
    fireEvent.click(screen.getByRole('button', { name: '带回主会话草稿' }));
    expect(bringBack).toHaveBeenCalledWith('教学回答');
  });
  it('ignores an old topic stream after switching and does not cancel when closed', async () => {
    const closed = vi.fn();
    const view = render(<TeacherChatPanel projectId="p" sourceId="c" onClose={closed} />);
    await ready();
    const old = streams.get('first')!;
    fireEvent.change(screen.getByRole('combobox', { name: '老师话题' }), {
      target: { value: 'second' },
    });
    await waitFor(() =>
      expect(screen.getByRole('combobox', { name: '老师话题' })).toHaveValue('second')
    );
    act(() =>
      old.dispatchEvent(
        new MessageEvent('snapshot', { data: JSON.stringify({ ...first, revision: 999 }) })
      )
    );
    expect(screen.getByRole('combobox', { name: '老师话题' })).toHaveValue('second');
    fireEvent.click(screen.getByRole('button', { name: '关闭老师' }));
    expect(closed).toHaveBeenCalledOnce();
    view.unmount();
    expect(api.cancel).not.toHaveBeenCalled();
    expect(old.close).toHaveBeenCalled();
  });
  it('shows disabled history while blocking a new question', async () => {
    api.config.mockResolvedValue({ enabled: false, definition });
    render(<TeacherChatPanel projectId="p" sourceId="c" />);
    await ready();
    fireEvent.change(screen.getByLabelText('向老师提问'), { target: { value: '问题' } });
    expect(screen.getByRole('button', { name: '提问', exact: true })).toBeDisabled();
    expect(api.read).toHaveBeenCalled();
  });
});