import assert from 'node:assert/strict';
import { after, before, describe, it } from 'node:test';
import { prisma } from '../src/lib/prisma.js';
import { PCQ_QUESTION_IDS } from '../src/modules/assessments/scoring/index.js';
import { COACH_SESSION_START_CUE } from '../src/modules/ai/coachPrompt.js';
import { seedCourseSessions } from '../src/modules/sessions/sessions.service.js';
import {
  assertNoSecrets,
  authHeader,
  createTestApp,
  isDatabaseAvailable,
  requestJson,
} from './helpers.js';

const app = createTestApp();
const createdUserIds: bigint[] = [];

function pcqAnswers(value: number) {
  return PCQ_QUESTION_IDS.map((questionId) => ({
    questionId,
    selectedValue: String(value),
  }));
}

async function registerUser(suffix: string) {
  const email = `chat-${suffix}-${Date.now()}@example.com`;
  const { status, body } = await requestJson(app, '/auth/register', {
    method: 'POST',
    body: JSON.stringify({ email, password: 'password12' }),
  });
  assert.equal(status, 201);
  const token = body.data?.sessionToken as string;
  const externalId = (body.data?.user as { id: string }).id;
  const user = await prisma.user.findUnique({ where: { externalId } });
  assert.ok(user);
  createdUserIds.push(user.id);
  return { token, user };
}

async function completePreTest(token: string) {
  const pre = await requestJson(app, '/assessments/attempts', {
    method: 'POST',
    headers: authHeader(token),
    body: JSON.stringify({ phase: 'pre', answers: pcqAnswers(4) }),
  });
  assert.equal(pre.status, 201);
}

describe('chat persistence and AI runtime', () => {
  let dbAvailable = false;

  before(async () => {
    dbAvailable = await isDatabaseAvailable();
    if (dbAvailable) {
      await seedCourseSessions();
    }
  });

  after(async () => {
    if (dbAvailable && createdUserIds.length > 0) {
      await prisma.user.deleteMany({ where: { id: { in: createdUserIds } } });
    }
  });

  it('rejects unauthenticated chat access', async () => {
    const created = await requestJson(app, '/chat/sessions', {
      method: 'POST',
      body: JSON.stringify({}),
    });
    assert.equal(created.status, 401);
  });

  it('does not leak AI secrets through public config', async () => {
    const { status, body, raw } = await requestJson(app, '/ai/config');
    assert.equal(status, 200);
    assert.equal(typeof body.data?.configured, 'boolean');
    assert.equal(typeof body.data?.provider, 'string');
    assert.ok((body.data?.provider as string).length > 0);
    assert.doesNotMatch(raw, /sk-/);
    assert.doesNotMatch(raw, /OPENAI_API_KEY/);
    assert.doesNotMatch(raw, /Bearer /);
    assertNoSecrets(raw);
  });

  it('lists AI runs for the authenticated user only', async (t) => {
    if (!dbAvailable) {
      t.skip('MySQL is not running');
      return;
    }

    const owner = await registerUser('runs-owner');
    const other = await registerUser('runs-other');
    await completePreTest(owner.token);

    const created = await requestJson(app, '/chat/sessions', {
      method: 'POST',
      headers: authHeader(owner.token),
      body: JSON.stringify({ sessionOrder: 1 }),
    });
    assert.equal(created.status, 201);
    const chatId = created.body.data?.id as string;

    await requestJson(app, `/chat/sessions/${chatId}/messages`, {
      method: 'POST',
      headers: authHeader(owner.token),
      body: JSON.stringify({ content: 'سلام' }),
    });

    const unauthorized = await requestJson(app, '/ai/runs');
    assert.equal(unauthorized.status, 401);

    const runs = await requestJson(app, '/ai/runs?limit=10', {
      headers: authHeader(owner.token),
    });
    assert.equal(runs.status, 200);
    const ownerRuns = runs.body.data as {
      id: string;
      provider: string;
      chatSessionId: string | null;
      status: string;
    }[];
    assert.ok(Array.isArray(ownerRuns));
    assert.ok(ownerRuns.length >= 1);
    assert.ok(ownerRuns.every((run) => typeof run.provider === 'string' && run.provider.length > 0));
    assert.ok(ownerRuns.some((run) => run.chatSessionId === chatId));
    assert.doesNotMatch(JSON.stringify(runs.body), /sk-/);
    assert.doesNotMatch(JSON.stringify(runs.body), /OPENAI_API_KEY/);

    const otherRuns = await requestJson(app, '/ai/runs', {
      headers: authHeader(other.token),
    });
    assert.equal(otherRuns.status, 200);
    const otherList = otherRuns.body.data as { chatSessionId: string | null }[];
    assert.equal(otherList.some((run) => run.chatSessionId === chatId), false);
  });

  it('persists chat ownership, order, and history without exposing hidden prompts', async (t) => {
    if (!dbAvailable) {
      t.skip('MySQL is not running');
      return;
    }

    const owner = await registerUser('owner');
    const other = await registerUser('other');
    await completePreTest(owner.token);

    const lockedFuture = await requestJson(app, '/chat/sessions', {
      method: 'POST',
      headers: authHeader(owner.token),
      body: JSON.stringify({ sessionOrder: 7 }),
    });
    assert.equal(lockedFuture.status, 403);

    const created = await requestJson(app, '/chat/sessions', {
      method: 'POST',
      headers: authHeader(owner.token),
      body: JSON.stringify({ sessionOrder: 1 }),
    });
    assert.equal(created.status, 201);
    const chatId = created.body.data?.id as string;
    assert.ok(chatId);
    assert.equal(created.body.data?.sessionOrder, 1);
    assert.equal(created.body.data?.endedAt, null);

    const listed = await requestJson(app, '/chat/sessions', {
      headers: authHeader(owner.token),
    });
    assert.equal(listed.status, 200);
    const listedSessions = listed.body.data as { id: string; sessionOrder: number }[];
    assert.ok(listedSessions.some((session) => session.id === chatId));

    const start = await requestJson(app, `/chat/sessions/${chatId}/start`, {
      method: 'POST',
      headers: authHeader(owner.token),
    });
    assert.ok(start.status === 200 || start.status === 503);
    if (start.status === 200) {
      const startMessages =
        (start.body.data?.messages as { role: string; content: string }[]) ?? [];
      assert.equal(startMessages.some((message) => message.role === 'system'), false);
      assert.equal(
        startMessages.some((message) => message.content.includes(COACH_SESSION_START_CUE)),
        false,
      );
    }

    const first = await requestJson(app, `/chat/sessions/${chatId}/messages`, {
      method: 'POST',
      headers: authHeader(owner.token),
      body: JSON.stringify({ content: 'سلام، آماده هستم.' }),
    });
    assert.ok(first.status === 201 || first.status === 503);

    const second = await requestJson(app, `/chat/sessions/${chatId}/messages`, {
      method: 'POST',
      headers: authHeader(owner.token),
      body: JSON.stringify({ content: 'لطفا ادامه بده.' }),
    });
    assert.ok(second.status === 201 || second.status === 503);

    const history = await requestJson(app, `/chat/sessions/${chatId}/messages`, {
      headers: authHeader(owner.token),
    });
    assert.equal(history.status, 200);
    const messages =
      (history.body.data?.messages as { role: string; content: string; createdAt: string }[]) ?? [];
    const userMessages = messages.filter((message) => message.role === 'user');
    assert.ok(userMessages.length >= 2);
    assert.equal(messages.some((message) => message.role === 'system'), false);
    assert.equal(
      messages.some((message) => message.content.includes(COACH_SESSION_START_CUE)),
      false,
    );
    assert.equal(userMessages[0]?.content, 'سلام، آماده هستم.');
    assert.equal(userMessages[1]?.content, 'لطفا ادامه بده.');
    assert.ok(new Date(userMessages[0].createdAt).getTime() <= new Date(userMessages[1].createdAt).getTime());

    const otherRead = await requestJson(app, `/chat/sessions/${chatId}/messages`, {
      headers: authHeader(other.token),
    });
    assert.equal(otherRead.status, 404);

    const otherWrite = await requestJson(app, `/chat/sessions/${chatId}/messages`, {
      method: 'POST',
      headers: authHeader(other.token),
      body: JSON.stringify({ content: 'پیام غیرمجاز' }),
    });
    assert.equal(otherWrite.status, 404);
  });
});