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 { exampleCompletionSignal } from '../src/modules/ai/sessionCompletion.js';
import { buildAiCoachSessionContext } from '../src/modules/ai/sessionContext.js';
import { getSessionByOrder, PROGRAM_SESSION_COUNT } from '../src/modules/sessions/catalog.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 = `domain-${suffix}-${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 };
}

describe('learning domain API', () => {
  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('GET /ai/config is public and does not leak secrets', 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?.model, 'string');
    assert.equal(typeof body.data?.provider, 'string');
    assert.doesNotMatch(raw, /sk-/);
    assert.doesNotMatch(raw, /OPENAI_API_KEY/);
    assertNoSecrets(raw);
  });

  it('gates journey, assessments, sequential sessions, and chat persistence', async (t) => {
    if (!dbAvailable) {
      t.skip('MySQL is not running');
      return;
    }

    const { token, user } = await registerUser('flow');

    const beforePre = await requestJson(app, '/journey', { headers: authHeader(token) });
    assert.equal(beforePre.status, 200);
    const beforePermissions = beforePre.body.data?.permissions as {
      canTakePreTest: boolean;
      canOpenTraining: boolean;
      canTakePostTest: boolean;
      isCompleted: boolean;
    };
    assert.equal(beforePermissions.canTakePreTest, true);
    assert.equal(beforePermissions.canOpenTraining, false);
    assert.equal(beforePermissions.canTakePostTest, false);

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

    const postTooSoon = await requestJson(app, '/assessments/attempts', {
      method: 'POST',
      headers: authHeader(token),
      body: JSON.stringify({ phase: 'post', answers: pcqAnswers(4) }),
    });
    assert.equal(postTooSoon.status, 403);

    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);
    assert.equal(pre.body.data?.scores && (pre.body.data.scores as { total: number }).total, 93);
    const reverseAnswer = (
      pre.body.data?.answers as { questionId: string; selectedValue: number; score: number }[]
    ).find((answer) => answer.questionId === 'pcq_13');
    assert.equal(reverseAnswer?.selectedValue, 4);
    assert.equal(reverseAnswer?.score, 3);

    const retake = await requestJson(app, '/assessments/attempts', {
      method: 'POST',
      headers: authHeader(token),
      body: JSON.stringify({ phase: 'pre', answers: pcqAnswers(5) }),
    });
    assert.equal(retake.status, 409);
    assert.equal(retake.body.error?.code, 'CONFLICT');

    const afterPre = await requestJson(app, '/journey', { headers: authHeader(token) });
    assert.equal((afterPre.body.data as { currentStep: string }).currentStep, 'training_in_progress');
    const afterPermissions = afterPre.body.data?.permissions as {
      canTakePreTest: boolean;
      canOpenTraining: boolean;
      canTakePostTest: boolean;
    };
    assert.equal(afterPermissions.canTakePreTest, false);
    assert.equal(afterPermissions.canOpenTraining, true);
    assert.equal(afterPermissions.canTakePostTest, false);

    const sessions = await requestJson(app, '/sessions', { headers: authHeader(token) });
    assert.equal(sessions.status, 200);
    const list = sessions.body.data as unknown as { order: number; unlocked: boolean; completed: boolean }[];
    assert.equal(list.length, PROGRAM_SESSION_COUNT);
    assert.equal(list[0]?.unlocked, true);
    assert.equal(list[1]?.unlocked, false);

    const sessionTwoComplete = await requestJson(app, '/sessions/2/complete', {
      method: 'POST',
      headers: authHeader(token),
      body: JSON.stringify({
        ...exampleCompletionSignal(buildAiCoachSessionContext(getSessionByOrder(2)!)),
      }),
    });
    assert.equal(sessionTwoComplete.status, 403);

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

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

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

    const stored = await requestJson(app, `/chat/sessions/${chatId}/messages`, {
      headers: authHeader(token),
    });
    assert.equal(stored.status, 200);
    const storedMessages = (stored.body.data?.messages as { role: string; content: string }[]) ?? [];
    assert.ok(storedMessages.filter((message) => message.role === 'user').length >= 2);

    const complete = await requestJson(app, '/sessions/1/complete', {
      method: 'POST',
      headers: authHeader(token),
      body: JSON.stringify({
        ...exampleCompletionSignal(buildAiCoachSessionContext(getSessionByOrder(1)!)),
        chatSessionId: chatId,
      }),
    });
    assert.equal(complete.status, 200);
    const completedSessions = complete.body.data?.completedSessions as number[];
    assert.deepEqual(completedSessions, [1]);

    const endedChat = await requestJson(app, `/chat/sessions/${chatId}/messages`, {
      headers: authHeader(token),
    });
    assert.equal(endedChat.status, 200);
    assert.ok((endedChat.body.data?.session as { endedAt: string | null }).endedAt);

    const listed = await requestJson(app, '/chat/sessions?sessionOrder=1', {
      headers: authHeader(token),
    });
    assert.equal(listed.status, 200);
    const listedSessions = listed.body.data as { id: string; sessionOrder: number; endedAt: string | null }[];
    assert.ok(listedSessions.some((session) => session.id === chatId && session.endedAt));

    const recomplete = await requestJson(app, '/sessions/1/complete', {
      method: 'POST',
      headers: authHeader(token),
      body: JSON.stringify({
        ...exampleCompletionSignal(buildAiCoachSessionContext(getSessionByOrder(1)!)),
        chatSessionId: chatId,
      }),
    });
    assert.equal(recomplete.status, 200);
    assert.deepEqual(recomplete.body.data?.completedSessions as number[], [1]);

    const afterSession = await requestJson(app, '/sessions', { headers: authHeader(token) });
    const afterList = afterSession.body.data as unknown as { order: number; unlocked: boolean }[];
    assert.equal(afterList[1]?.unlocked, true);

    const stillNoPost = await requestJson(app, '/journey', { headers: authHeader(token) });
    assert.equal(
      (stillNoPost.body.data?.permissions as { canTakePostTest: boolean }).canTakePostTest,
      false,
    );
  });
});