// @vitest-environment node
import { randomUUID } from 'node:crypto';
import { mkdtemp, readFile, rm } from 'node:fs/promises';
import { tmpdir } from 'node:os';
import path from 'node:path';
import { afterEach, describe, expect, it, vi } from 'vitest';
import { TeacherConversationStore } from '../../electron/coding-teacher/conversation-store';
import { TeacherTopicStore } from '../../electron/coding-teacher/store';
import { applyTeacherReply } from '../../electron/coding-teacher/reply';
import { CodingTeacherService } from '../../electron/coding-teacher/service';
import { CodingProjectService } from '../../electron/coding-projects/project-service';
import { createCodingProjectStore, createMemoryCodingProjectStorage } from '../../electron/coding-projects/project-store';
import { InMemoryConversationRuntime } from '../../electron/coding-runtime/in-memory-conversation-runtime';
import { atomicWriteJson } from '../../electron/coding-projects/atomic-json';
import * as atomic from '../../electron/coding-projects/atomic-json';
import { createTeacherReadTools } from '../../electron/coding-teacher/read-tools';
import { createServer } from 'node:http';
import { handleCodingTeacherRoutes } from '../../electron/api/routes/coding-teacher';
import type { HostApiContext } from '../../electron/api/context';
import type { TeacherDefinition, TeacherRequest, TeacherTopic } from '../../shared/coding-teacher';

const definition: TeacherDefinition = { schema_version: 1, config_id: 'agent-a', teacher_id: 'teacher',
  runtime: 'yuxi', name: '设计老师', description: '', avatar_id: 'avatar-01', system_prompt: '', skills: [],
  welcome_message: '', suggested_questions: [], model: { model_id: 'model', reasoning_choice: { mode: 'default' } },
  limits: { max_input_tokens: 8000, max_output_tokens: 1000 } };
const roots: string[] = [];
const services: CodingTeacherService[] = [];
afterEach(async () => {
  vi.restoreAllMocks();
  await Promise.all(services.splice(0).map(service => service.dispose()));
  await Promise.all(roots.splice(0).map(root => rm(root, { recursive: true, force: true })));
});
async function root() { const dir = await mkdtemp(path.join(tmpdir(), 'single-agent-chat-')); roots.push(dir); return dir; }
function turn(index: number): TeacherRequest {
  return { id: randomUUID(), text: '重复的问题', references: [], createdAt: new Date(1000 * index).toISOString(),
    sourceCursor: { seq: 0, workerGeneration: 0 }, sourceCapturedAt: 'now', includedSourceMessageIds: [],
    omittedMessages: 0, status: 'completed', response: '回答 ' + index };
}
describe('continuous conversation persistence', () => {
  it('preserves individual completion times and reads older replies without backfilling or rewriting them', async () => {
    const dir = await root();
    const store = new TeacherConversationStore(dir, 'account', 'agent-a');
    const topic = await store.ensure(definition, 1);
    const old = turn(1), recent = { ...turn(2), finishedAt: '2026-09-29T08:01:42.000Z' };
    topic.requests = [old, recent];
    await store.save(topic);
    const first = await new TeacherConversationStore(dir, 'account', 'agent-a').read();
    expect(first.requests[0]).not.toHaveProperty('finishedAt');
    expect(first.requests[1].finishedAt).toBe(recent.finishedAt);
    const second = await new TeacherConversationStore(dir, 'account', 'agent-a').read();
    expect(second.requests).toEqual(first.requests);
    expect(second.requests[0].createdAt).toBe(old.createdAt);
  });

  it('repairs retained replies on every page without rewriting their files during restart recovery', async () => {
    const dir = await root();
    const store = new TeacherConversationStore(dir, 'account', 'agent-a');
    const topic = await store.ensure(definition, 1);
    const prose = '它早就不是"刚搭好架子"那种阶段了。\n完整的后半段。';
    const damaged = { ...turn(0), response: '它早就不是', discussionError: '旧解析失败',
      unparsedResponse: '{"reply":"' + prose + '","quickReplies":[]}' };
    const incomplete = { ...turn(1), response: '它早就不是', discussionError: '旧解析失败',
      unparsedResponse: '{"reply":"它早就不是"刚搭好架子' };
    const running = { ...turn(60), status: 'running' as const };
    topic.requests = [damaged, incomplete, ...Array.from({ length: 57 }, (_, i) => turn(i + 2)), running];
    await store.save(topic);
    const file = (id: string) => path.join(dir, 'turns', id + '.json');
    const rawBefore = await readFile(file(damaged.id), 'utf8');
    // Simulate a pre-repair index, including an untrusted partial assistant excerpt.
    const manifestFile = path.join(dir, 'conversation.json');
    const manifest = JSON.parse(await readFile(manifestFile, 'utf8'));
    for (const item of manifest.turns) delete item.replyProjectionVersion;
    manifest.turns[1].messages.push({ id: 'teacher:' + incomplete.id + ':assistant', role: 'assistant', text: '它早就不是' });
    await atomicWriteJson(manifestFile, manifest);
    const resumed = new TeacherConversationStore(dir, 'account', 'agent-a');
    const latest = await resumed.page();
    expect(latest.requests.at(-1)?.status).toBe('interrupted');
    const archive = await resumed.history();
    expect(archive.messages.some(message => message.text === '它早就不是')).toBe(false);
    expect(await archive.read('teacher:' + incomplete.id + ':assistant')).toBeUndefined();
    expect((await archive.read('teacher:' + damaged.id + ':assistant'))?.text).toBe(prose);
    const older = await resumed.page(latest.before!);
    expect(older.requests[0]).toMatchObject({ response: prose, unparsedResponse: damaged.unparsedResponse });
    expect(older.requests[1].replyIncomplete).toBe(true);
    expect(await readFile(file(damaged.id), 'utf8')).toBe(rawBefore);
    expect(JSON.parse(await readFile(file(incomplete.id), 'utf8'))).not.toHaveProperty('replyIncomplete');
    expect(JSON.parse(await readFile(file(running.id), 'utf8')).status).toBe('interrupted');
  });

  it('keeps rejected new shortcuts hidden after reload while retaining historical cards', async () => {
    const dir = await root();
    const store = new TeacherConversationStore(dir, 'account', 'agent-a');
    const topic = await store.ensure(definition, 1);
    const current = turn(1);
    const old = { ...turn(0), suggestedQuestions: ['一', '二', '三', '四'] };
    applyTeacherReply(current, JSON.stringify({ reply: '完整回答', quickReplies: old.suggestedQuestions }));
    topic.requests = [old, current];
    await store.save(topic);
    const loaded = await new TeacherConversationStore(dir, 'account', 'agent-a').read();
    expect(loaded.requests[0].suggestedQuestions).toEqual(old.suggestedQuestions);
    expect(loaded.requests[1]).toMatchObject({ response: '完整回答', suggestedQuestions: [], replyQuickRepliesRejected: true, replyParseError: expect.any(String) });
  });

  it('pages thousands of turns, restores the latest page and preserves repeated questions', async () => {
    const dir = await root();
    const store = new TeacherConversationStore(dir, 'account', 'agent-a');
    const topic = await store.ensure(definition, 1);
    topic.requests = Array.from({ length: 1001 }, (_, i) => turn(i));
    await store.save(topic);
    const resumed = new TeacherConversationStore(dir, 'account', 'agent-a');
    expect((await resumed.read()).requests).toHaveLength(50);
    const latest = await resumed.page();
    expect(latest.requests.at(-1)?.response).toBe('回答 1000');
    const older = await resumed.page(latest.before!);
    expect(older.requests.at(-1)?.response).toBe('回答 950');
    expect(new Set([...older.requests, ...latest.requests].map(turn => turn.id)).size).toBe(100);
    expect((await resumed.findRequest(topic.requests[0].id))?.response).toBe('回答 0');
    const archive = await resumed.history();
    topic.requests.push(turn(1002)); await store.save(topic, topic.requests.at(-1)!.id);
    const tools = createTeacherReadTools({ projectPath: dir, history: (await resumed.read()).requests, archive,
      source: { messages: [], cursor: { seq: 0, workerGeneration: 0 }, capturedAt: 'now' }, assertCurrent() {} });
    const signal = new AbortController().signal;
    expect(await tools.execute('read_conversation', JSON.stringify({message_id: `teacher:${topic.requests[0].id}:assistant`}), signal)).toContain('回答 0');
    expect((await tools.executeResult('read_conversation', JSON.stringify({message_id: `teacher:${topic.requests.at(-1)!.id}:assistant`}), signal)).status).toBe('error');
    await resumed.markSeen(latest.requests.at(-1)!.id);
    await resumed.markSeen(older.requests[0].id);
    expect((await new TeacherConversationStore(dir, 'account', 'agent-a').read()).conversation?.seenThrough).toBe(latest.requests.at(-1)!.id);
  });
  it('recovers a turn written before its index and marks only unfinished work interrupted', async () => {
    const dir = await root();
    const store = new TeacherConversationStore(dir, 'account', 'agent-a');
    await store.ensure(definition, 1);
    const pending = { ...turn(1), status: 'running' as const };
    await atomicWriteJson(path.join(dir, 'turns', pending.id + '.json'), pending);
    const resumed = new TeacherConversationStore(dir, 'account', 'agent-a');
    expect((await resumed.read()).requests[0]).toMatchObject({ id: pending.id, status: 'interrupted' });
    expect((await resumed.page()).requests).toHaveLength(1);
  });
  it('imports separate topics idempotently without changing old files or merging repeated text', async () => {
    const dir = await root(), project = { id: randomUUID(), path: path.join(dir, 'project'), name: '旧项目' };
    const oldStore = new TeacherTopicStore(path.join(project.path, '.makelore', 'teacher-conversations', 'account', 'project'));
    const old: TeacherTopic = { schemaVersion: 1, revision: 1, accountId: 'account', id: randomUUID(),
      projectId: project.id, sourceConversationId: 'project', definition, version: 1, createdAt: 'now', updatedAt: 'now',
      requests: [turn(1), turn(2)] };
    await oldStore.save(old);
    const file = path.join(oldStore.directory, old.id + '.json'), before = await readFile(file, 'utf8');
    const target = path.join(dir, 'new');
    const store = new TeacherConversationStore(target, 'account', 'agent-a');
    await store.importProject(project);
    const resumed = new TeacherConversationStore(target, 'account', 'agent-a');
    await resumed.importProject(project);
    expect((await resumed.read()).requests).toHaveLength(2);
    expect((await resumed.read()).requests[0].origin?.topicId).toBe(old.id);
    expect(await readFile(file, 'utf8')).toBe(before);
    const other = new TeacherConversationStore(path.join(dir, 'other'), 'another-account', 'agent-a');
    await other.importProject(project);
    expect(await other.exists()).toBe(false);
  });
  it('imports reply history and its execution identity without reviving archived components', async () => {
    const dir = await root(), project = { id: randomUUID(), path: path.join(dir, 'project'), name: '旧项目' };
    const sourceId = randomUUID();
    const archived = { obsoleteComponent: 'never-send-this-to-model', broken: ['not', 'a', 'component'] };
    const oldStore = new TeacherTopicStore(path.join(project.path, '.makelore', 'teacher-conversations', 'account', sourceId));
    const request: TeacherRequest = { ...turn(1), sourceConversationId: sourceId,
      presentation: 'discussion-v1', discussionContext: archived, discussionSnapshot: archived,
      discussionError: 'historical parser error', cloudRequestId: 'old-cloud-request',
      response: '保留的正文', suggestedQuestions: ['继续聊这个想法'] };
    const old: TeacherTopic = { schemaVersion: 1, revision: 1, accountId: 'account', id: randomUUID(),
      projectId: project.id, sourceConversationId: sourceId, definition, version: 7,
      createdAt: 'now', updatedAt: 'now', requests: [request], discussion: archived };
    await oldStore.save(old);
    const file = path.join(oldStore.directory, old.id + '.json'), before = await readFile(file, 'utf8');
    const target = path.join(dir, 'new');
    const store = new TeacherConversationStore(target, 'account', 'agent-a');
    await store.importProject(project);
    const resumed = new TeacherConversationStore(target, 'account', 'agent-a');
    await resumed.importProject(project);
    const topic = await resumed.read();
    expect(topic.requests).toHaveLength(1);
    expect(topic.requests[0]).toMatchObject({
      origin: { projectId: project.id, topicId: old.id, requestId: request.id },
      projectId: project.id, projectName: project.name, sourceConversationId: sourceId,
      teacherVersion: 7, runtimeThreadId: old.id, cloudRequestId: 'old-cloud-request',
      response: '保留的正文', suggestedQuestions: ['继续聊这个想法'],
      discussionContext: archived, discussionSnapshot: archived, discussionError: 'historical parser error',
    });
    expect(topic.conversation).not.toHaveProperty('discussions');
    expect(topic).not.toHaveProperty('discussion');
    const manifest = JSON.parse(await readFile(path.join(target, 'conversation.json'), 'utf8'));
    expect(manifest).not.toHaveProperty('importedDiscussions');
    expect(JSON.stringify((await resumed.history()).messages)).not.toContain(archived.obsoleteComponent);
    const history = await resumed.history();
    expect((await history.read(`teacher:${topic.requests[0].id}:assistant`))?.text)
      .toBe('保留的正文\n\n可以接着聊的问题：\n- 继续聊这个想法');
    expect(await readFile(file, 'utf8')).toBe(before);
  });
  it('preserves existing continuous-chat component archives opaquely across recovery and writes', async () => {
    const dir = await root();
    const store = new TeacherConversationStore(dir, 'account', 'agent-a');
    const topic = await store.ensure(definition, 1);
    expect(topic.conversation).not.toHaveProperty('discussions');
    const manifestPath = path.join(dir, 'conversation.json');
    const manifest = JSON.parse(await readFile(manifestPath, 'utf8'));
    const archives = { project: { malformedLegacyState: true, active: ['opaque', 'archive'] } };
    const imported = { project: { legacyMarker: true } };
    manifest.topic.conversation.discussions = archives;
    manifest.importedDiscussions = imported;
    await atomicWriteJson(manifestPath, manifest);
    const pending = { ...turn(1), status: 'running' as const, discussionSnapshot: { malformed: true } };
    await atomicWriteJson(path.join(dir, 'turns', pending.id + '.json'), pending);
    const resumed = new TeacherConversationStore(dir, 'account', 'agent-a');
    const restored = await resumed.read();
    expect(restored.requests[0]).toMatchObject({ status: 'interrupted', discussionSnapshot: { malformed: true } });
    restored.requests.push(turn(2));
    await resumed.save(restored, restored.requests[1].id);
    const saved = JSON.parse(await readFile(manifestPath, 'utf8'));
    expect(saved.topic.conversation.discussions).toEqual(archives);
    expect(saved.importedDiscussions).toEqual(imported);
    expect((await new TeacherConversationStore(dir, 'account', 'agent-a').page()).requests).toHaveLength(2);
  });
  it('recovers an import index failure before retrying in the same process', async () => {
    const dir = await root(), project = { id: randomUUID(), path: path.join(dir, 'project'), name: '旧项目' };
    const oldStore = new TeacherTopicStore(path.join(project.path, '.makelore', 'teacher-conversations', 'account', 'project'));
    const old: TeacherTopic = { schemaVersion: 1, revision: 1, accountId: 'account', id: randomUUID(),
      projectId: project.id, sourceConversationId: 'project', definition, version: 1, createdAt: 'now', updatedAt: 'now', requests: [turn(1)] };
    await oldStore.save(old);
    const store = new TeacherConversationStore(path.join(dir, 'chat'), 'account', 'agent-a');
    await store.ensure(definition, 1);
    const write = atomic.atomicWriteJson;
    let fail = true;
    vi.spyOn(atomic, 'atomicWriteJson').mockImplementation(async (file, value) => {
      if (fail && file.endsWith('conversation.json')) { fail = false; throw new Error('disk unavailable'); }
      return write(file, value);
    });
    await expect(store.importProject(project)).rejects.toThrow('disk unavailable');
    await store.importProject(project);
    expect((await store.page()).requests).toHaveLength(1);
    expect((await store.page()).requests[0].origin?.requestId).toBe(old.requests[0].id);
  });
});

it('serves paged account chats and compact SSE, preserves legacy source records and never dispatches on reads', async () => {
  const f = await fixture();
  const oldStore = new TeacherTopicStore(path.join(f.a.project.path, '.makelore', 'teacher-conversations', 'account', f.aSource.id));
  const old: TeacherTopic = { schemaVersion: 1, revision: 1, accountId: 'account', id: randomUUID(),
    projectId: f.a.project.id, sourceConversationId: f.aSource.id, definition, version: 1,
    createdAt: 'now', updatedAt: 'now', requests: Array.from({length: 65}, (_, i) => turn(i)) };
  await oldStore.save(old);
  const server = createServer((req, res) => { void handleCodingTeacherRoutes(req, res, new URL(req.url!, 'http://localhost'),
    {codingProducts: {teacher: f.service}} as HostApiContext); });
  await new Promise<void>(resolve => server.listen(0, '127.0.0.1', resolve));
  const address = server.address(); if (!address || typeof address === 'string') throw new Error('no address');
  const origin = 'http://127.0.0.1:' + address.port, base = origin + '/api/coding/agent-conversations/agent-a';
  const post = (url: string, input: unknown) => fetch(url, {method: 'POST', headers: {'Content-Type': 'application/json'}, body: JSON.stringify(input)});
  try {
    const page = await (await fetch(base)).json();
    expect(page.topic.requests).toHaveLength(50);
    expect((await (await fetch(base + '?before=' + page.before)).json()).topic.requests).toHaveLength(15);
    const archive = origin + '/api/coding/projects/' + f.a.project.id + '/agent-history';
    expect((await (await fetch(archive)).json()).items[0]).toMatchObject({id: old.id, legacySourceId: f.aSource.id});
    expect((await (await fetch(archive + '/' + old.id + '?source=' + f.aSource.id)).json()).requests).toHaveLength(65);
    expect((await post(archive, {})).status).toBe(405);
    expect(f.run).not.toHaveBeenCalled();
    const input = {projectId: f.b.project.id, sourceConversationId: f.bSource.id, requestId: randomUUID(), text: '继续'};
    expect((await post(base + '/messages', input)).status).toBe(202);
    expect((await post(base + '/messages', input)).status).toBe(202);
    await f.settled(); expect(f.run).toHaveBeenCalledTimes(1);
    const reader = (await fetch(base + '/events')).body!.getReader();
    const chunk = new TextDecoder().decode((await reader.read()).value);
    const snapshot = JSON.parse(chunk.split('data: ')[1].split('\n')[0]);
    expect(snapshot.requests).toHaveLength(1); expect(snapshot.requests[0].id).toBe(input.requestId);
    await reader.cancel();
    expect((await (await post(base + '/seen', {requestId: input.requestId})).json()).conversation.seenThrough).toBe(input.requestId);
    expect((await fetch(base + '?before=missing')).status).toBe(400);
  } finally { server.closeAllConnections(); await new Promise<void>(resolve => server.close(() => resolve())); }
});

async function fixture() {
  const dir = await root();
  const projects = new CodingProjectService(createCodingProjectStore(createMemoryCodingProjectStorage()));
  const a = await projects.createProject({ projectPath: path.join(dir, 'weather'), identity: { kind: 'create' } });
  const b = await projects.createProject({ projectPath: path.join(dir, 'game'), identity: { kind: 'create' } });
  const source = async (project: typeof a) => projects.conversationStore(project.project.path)
    .create({ agentId: project.config.defaultAgentId!, title: '操作对话', model: null, modelResolution: 'required' });
  const aSource = await source(a), aOther = await source(a), bSource = await source(b);
  let release: (() => void) | undefined;
  let wait = false, version = 1, enabled = true, accountId = 'account';
  const run = vi.fn(async (messages, _signal: AbortSignal, onText: (text: string) => void) => {
    onText('已查看');
    if (wait) await new Promise<void>(resolve => { release = resolve; });
    return { inputTokens: 10, outputTokens: 5 };
  });
  const prepareCloud = vi.fn((_account, _topic, _id, _access) => ({ inputLimit: 8000, run }));
  const service = new CodingTeacherService({ projects, runtime: new InMemoryConversationRuntime(), userDataDir: dir,
    account: async () => ({ id: accountId, binding: { accountKey: accountId, epoch: 1 } }), assertAccount: () => undefined,
    catalog: async () => ({ items: enabled ? [{ teacher_id: 'agent-a', version, definition, is_default: true }] : [] }),
    prepareCloud,
    readSource: async () => ({ messages: [{ id: 'pi', role: 'user', text: '项目上下文' }],
      cursor: { seq: 0, workerGeneration: 0 }, capturedAt: 'now' }),
  });
  services.push(service);
  const send = (project = a, session = aSource, requestId = randomUUID()) => service.sendConversation('agent-a', {
    projectId: project.project.id, sourceConversationId: session.id, requestId, text: '帮我看看',
  });
  const settled = async () => {
    await vi.waitFor(async () => expect((await service.conversation('agent-a')).topic?.requests.at(-1)?.status).toBe('completed'));
    return (await service.conversation('agent-a')).topic!;
  };
  return { service, a, b, aSource, aOther, bSource, prepareCloud, run, send, settled,
    wait: () => { wait = true; }, release: () => { wait = false; release?.(); },
    version: (v: number) => { version = v; }, enabled: (v: boolean) => { enabled = v; },
    account: (id: string) => { accountId = id; } };
}
describe('one account-agent conversation', () => {
  it('keeps one visible chat across projects and versions while freezing each execution scope', async () => {
    const f = await fixture();
    await f.send(); const first = await f.settled();
    await f.send(); const same = await f.settled();
    expect(same.id).toBe(first.id);
    expect(same.requests[1].runtimeThreadId).toBe(first.requests[0].runtimeThreadId);
    // The same cloud checkpoint already owns the previous exchange.
    expect(f.run.mock.calls[1][0].filter((m: { content: string }) => m.content.includes('已查看'))).toHaveLength(0);
    await f.send(f.b, f.bSource); const second = await f.settled();
    expect(second.id).toBe(first.id);
    expect(second.requests[2].runtimeThreadId).not.toBe(first.requests[0].runtimeThreadId);
    expect(f.prepareCloud.mock.calls[2][3].projectPath).toBe(f.b.project.path);
    expect(JSON.stringify(f.run.mock.calls[2][0])).toContain('weather');
    f.version(2); await f.send(f.b, f.bSource); const updated = await f.settled();
    expect(updated.id).toBe(first.id);
    expect(updated.requests.map(request => request.teacherVersion)).toEqual([1, 1, 1, 2]);
    expect(updated.requests[3].runtimeThreadId).not.toBe(updated.requests[2].runtimeThreadId);
    f.enabled(false);
    await expect(f.send()).rejects.toMatchObject({ code: 'teacher_disabled' });
    expect((await f.service.conversation('agent-a')).topic?.requests).toHaveLength(4);
  });
  it('deduplicates concurrent submissions, rejects a second active turn and rotates on Pi source change', async () => {
    const f = await fixture(); f.wait();
    const requestId = randomUUID();
    const [a, b] = await Promise.all([f.send(f.a, f.aSource, requestId), f.send(f.a, f.aSource, requestId)]);
    expect(a.id).toBe(b.id);
    expect(f.run).toHaveBeenCalledTimes(1);
    await expect(f.send(f.b, f.bSource)).rejects.toMatchObject({ code: 'teacher_topic_busy' });
    expect(f.prepareCloud.mock.calls[0][3].projectPath).toBe(f.a.project.path);
    f.release(); await f.settled();
    await f.send(f.a, f.aOther); const next = await f.settled();
    expect(next.requests[1].runtimeThreadId).not.toBe(next.requests[0].runtimeThreadId);
    f.account('other');
    expect((await f.service.conversation('agent-a')).topic).toBe(null);
    await f.send(); expect((await f.settled()).id).not.toBe(a.id);
  });
});