support_backend/tests/integration/agent-ticket-queue.test.ts

import { describe, it, expect, beforeAll, afterAll } from 'vitest';
import { buildApp } from '@/app';
import { prismaClient } from '@/infrastructure/database';
import { FastifyInstance } from 'fastify';
import bcrypt from 'bcryptjs';
import { loginAs, authHeader } from '../helpers/auth';
import {
  encryptCredential,
  generateCredentialSecret,
  issueIntegrationToken,
} from '@/modules/catalog/products';

/**
 * Covers specs/011-agent-ticket-queue/quickstart.md Scenarios 1-3 against a real Postgres/
 * Redis — linking a User to an Agent roster row (and its rejection rules), an agent listing
 * their own currently-assigned tickets, and the admin equivalent for an explicit agent.
 */
describe('Agent ticket queue (User Stories 1-2)', () => {
  let app: FastifyInstance;
  let adminToken: string;
  const suffix = Date.now();
  const externalProductId = `TEST_ATQ_PROD_${suffix}`;
  const skillTag = `atq_skill_${suffix}`;
  const password = 'Agent-Queue-Test-1!';
  let productId: string;
  let teamId: string;
  let agentXId: string;
  let agentYId: string;
  let secret: string;
  const createdUserIds: string[] = [];
  const createdTicketIds: string[] = [];

  async function createUser(email: string, role: 'ADMIN' | 'AGENT'): Promise<string> {
    const user = await prismaClient.user.create({
      data: { email, name: email, role, passwordHash: await bcrypt.hash(password, 10) },
    });
    createdUserIds.push(user.id);
    return user.id;
  }

  async function loginAsUser(email: string): Promise<string> {
    const res = await app.inject({
      method: 'POST',
      url: '/auth/login',
      payload: { email, password },
    });
    return res.json().data.token as string;
  }

  async function createTicket(): Promise<string> {
    const token = issueIntegrationToken(secret, {
      externalProductId,
      tenantId: 'tenant-1',
      userId: 'user-1',
    });
    const created = await app.inject({
      method: 'POST',
      url: '/v1/support/requests',
      headers: { authorization: `Bearer ${token}` },
      payload: {
        productId: externalProductId,
        tenantId: 'tenant-1',
        userId: 'user-1',
        source: 'test',
        problem: `Needs a human ${Date.now()}-${Math.random()}`,
      },
    });
    const ticketId = created.json().data.ticketId as string;
    createdTicketIds.push(ticketId);
    return ticketId;
  }

  async function assignTo(ticketId: string, agentId: string): Promise<void> {
    const ticket = await prismaClient.ticket.findUniqueOrThrow({ where: { id: ticketId } });
    if (ticket.status === 'NEW') {
      await app.inject({
        method: 'PATCH',
        url: `/tickets/${ticketId}/status`,
        headers: authHeader(adminToken),
        payload: { status: 'HUMAN_ESCALATION', expectedVersion: ticket.version },
      });
    }
    await app.inject({
      method: 'POST',
      url: `/admin/tickets/${ticketId}/assignment`,
      headers: authHeader(adminToken),
      payload: { agentId, reason: 'test setup', strategy: 'MANUAL' },
    });
  }

  beforeAll(async () => {
    app = await buildApp();
    adminToken = await loginAs(app, 'ADMIN');

    const product = await prismaClient.product.create({
      data: { externalProductId, name: 'Agent Ticket Queue Test Product', status: 'active' },
    });
    productId = product.id;
    secret = generateCredentialSecret();
    await prismaClient.productIntegration.create({
      data: {
        productId,
        credentialRef: encryptCredential(secret),
        authMechanism: 'signed_token',
        allowedScope: { tenantIds: ['tenant-1'] },
        status: 'active',
        rateLimitPerMinute: 1000,
        rateLimitPerUserPerMinute: 1000,
      },
    });

    const team = await app.inject({
      method: 'POST',
      url: '/admin/teams',
      headers: authHeader(adminToken),
      payload: { name: `ATQ Team ${suffix}` },
    });
    teamId = team.json().data.id;

    const agentX = await app.inject({
      method: 'POST',
      url: `/admin/teams/${teamId}/agents`,
      headers: authHeader(adminToken),
      payload: { name: 'ATQ Agent X' },
    });
    agentXId = agentX.json().data.id;
    await app.inject({
      method: 'PUT',
      url: `/admin/agents/${agentXId}/skills/${skillTag}`,
      headers: authHeader(adminToken),
      payload: { level: 3 },
    });

    const agentY = await app.inject({
      method: 'POST',
      url: `/admin/teams/${teamId}/agents`,
      headers: authHeader(adminToken),
      payload: { name: 'ATQ Agent Y' },
    });
    agentYId = agentY.json().data.id;
    await app.inject({
      method: 'PUT',
      url: `/admin/agents/${agentYId}/skills/${skillTag}`,
      headers: authHeader(adminToken),
      payload: { level: 3 },
    });

    await app.inject({
      method: 'POST',
      url: '/admin/hierarchy-nodes',
      headers: authHeader(adminToken),
      payload: {
        name: 'ATQ Node',
        order: 0,
        productScope: [externalProductId],
        skills: [skillTag],
        assignmentStrategy: 'ROUND_ROBIN',
      },
    });
  });

  afterAll(async () => {
    const ticketFilter = { ticketId: { in: createdTicketIds } };
    await prismaClient.assignmentHistory.deleteMany({ where: ticketFilter });
    await prismaClient.assignment.deleteMany({ where: ticketFilter });
    await prismaClient.hierarchyNode.deleteMany({ where: { name: 'ATQ Node' } });
    await prismaClient.agentSkill.deleteMany({ where: { agentId: { in: [agentXId, agentYId] } } });
    await prismaClient.ticketMessage.deleteMany({ where: ticketFilter });
    await prismaClient.ticket.deleteMany({ where: { id: { in: createdTicketIds } } });
    await prismaClient.problem.deleteMany({ where: { productId } });
    await prismaClient.agent.deleteMany({ where: { teamId } });
    await prismaClient.team.deleteMany({ where: { id: teamId } });
    await prismaClient.productIntegration.deleteMany({ where: { productId } });
    await prismaClient.product.deleteMany({ where: { id: productId } });
    await prismaClient.user.deleteMany({ where: { id: { in: createdUserIds } } });
    await app.close();
  });

  it('User Story 1: linking succeeds, rejects a non-AGENT role, and rejects a duplicate link', async () => {
    const userXId = await createUser(`atq-agent-x-${suffix}@supporthub.test`, 'AGENT');
    const userYId = await createUser(`atq-agent-y-${suffix}@supporthub.test`, 'AGENT');
    const adminRoleUserId = await createUser(`atq-admin-role-${suffix}@supporthub.test`, 'ADMIN');

    const link = await app.inject({
      method: 'PATCH',
      url: `/admin/agents/${agentXId}`,
      headers: authHeader(adminToken),
      payload: { userId: userXId },
    });
    expect(link.statusCode).toBe(200);
    expect(link.json().data.userId).toBe(userXId);

    const nonAgentRole = await app.inject({
      method: 'PATCH',
      url: `/admin/agents/${agentYId}`,
      headers: authHeader(adminToken),
      payload: { userId: adminRoleUserId },
    });
    expect(nonAgentRole.statusCode).toBe(400);

    const duplicateLink = await app.inject({
      method: 'PATCH',
      url: `/admin/agents/${agentYId}`,
      headers: authHeader(adminToken),
      payload: { userId: userXId },
    });
    expect(duplicateLink.statusCode).toBe(409);

    const linkY = await app.inject({
      method: 'PATCH',
      url: `/admin/agents/${agentYId}`,
      headers: authHeader(adminToken),
      payload: { userId: userYId },
    });
    expect(linkY.statusCode).toBe(200);
  });

  it('User Story 2: an agent sees exactly their own current assignments, live', async () => {
    const agentXToken = await loginAsUser(`atq-agent-x-${suffix}@supporthub.test`);
    const agentYToken = await loginAsUser(`atq-agent-y-${suffix}@supporthub.test`);

    const ticket1 = await createTicket();
    const ticket2 = await createTicket();
    const ticket3 = await createTicket();
    await assignTo(ticket1, agentXId);
    await assignTo(ticket2, agentXId);
    await assignTo(ticket3, agentYId);

    const xList = await app.inject({
      method: 'GET',
      url: '/agents/me/tickets',
      headers: authHeader(agentXToken),
    });
    expect(xList.statusCode).toBe(200);
    const xIds = xList.json().data.map((t: { id: string }) => t.id);
    expect(xIds.sort()).toEqual([ticket1, ticket2].sort());
    const firstEntry = xList.json().data[0];
    expect(firstEntry).toHaveProperty('code');
    expect(firstEntry).toHaveProperty('product.externalProductId', externalProductId);
    expect(firstEntry).toHaveProperty('customer.externalUserId', 'user-1');

    // Reassign ticket1 away from X — the list must reflect live state, not a snapshot.
    await assignTo(ticket1, agentYId);
    const xListAfter = await app.inject({
      method: 'GET',
      url: '/agents/me/tickets',
      headers: authHeader(agentXToken),
    });
    expect(xListAfter.json().data.map((t: { id: string }) => t.id)).toEqual([ticket2]);

    const yList = await app.inject({
      method: 'GET',
      url: '/agents/me/tickets',
      headers: authHeader(agentYToken),
    });
    expect(
      yList
        .json()
        .data.map((t: { id: string }) => t.id)
        .sort(),
    ).toEqual([ticket1, ticket3].sort());
  });

  it('User Story 2: a session with no linked agent is rejected distinctly from an empty list', async () => {
    await createUser(`atq-unlinked-${suffix}@supporthub.test`, 'AGENT');
    const unlinkedToken = await loginAsUser(`atq-unlinked-${suffix}@supporthub.test`);

    const res = await app.inject({
      method: 'GET',
      url: '/agents/me/tickets',
      headers: authHeader(unlinkedToken),
    });
    expect(res.statusCode).toBe(404);
  });

  it('User Story 2: the admin route returns the same shape for an explicit agent, and rejects a non-admin', async () => {
    const agentYToken = await loginAsUser(`atq-agent-y-${suffix}@supporthub.test`);

    const asAdmin = await app.inject({
      method: 'GET',
      url: `/admin/agents/${agentYId}/tickets`,
      headers: authHeader(adminToken),
    });
    expect(asAdmin.statusCode).toBe(200);
    expect(Array.isArray(asAdmin.json().data)).toBe(true);

    const asNonAdmin = await app.inject({
      method: 'GET',
      url: `/admin/agents/${agentYId}/tickets`,
      headers: authHeader(agentYToken),
    });
    expect(asNonAdmin.statusCode).toBe(403);
  });
});