'use strict';

/**
 * Integration tests – dlq controller (controllers/dlq.js)
 *
 * The dlq controller connects to RabbitMQ for most of its functionality.
 * Tests here focus on pure input-validation paths that call next() with an
 * error before any RabbitMQ or Management-API call is made, plus DB-backed
 * partner paths (tracker stats, archive) that only require MongoDB.
 */

const { connectDB, disconnectDB } = require('./jest.setup');
const { mockReq, mockRes, newId } = require('./mock_data');

let PartnerLogTracker;

beforeAll(async () => {
  await connectDB();
  PartnerLogTracker = require('../../model/partner_log_tracker');
});

afterAll(async () => {
  await disconnectDB();
});

const dlqCtl = require('../../controllers/dlq');

// Helper: build a req with params and/or body.
function makeReq({ params = {}, body = {}, query = {} } = {}) {
  const req = mockReq({ body, query });
  req.params = params;
  return req;
}

// ---------------------------------------------------------------------------
describe('dlq controller – getDLQStats_get', () => {
  it('calls next() when queueName param is missing', async () => {
    const req = makeReq({ params: {} });
    const res = mockRes();
    const next = jest.fn();

    await dlqCtl.getDLQStats_get(req, res, next);

    expect(next).toHaveBeenCalled();
    expect(res.json).not.toHaveBeenCalled();
  });

  it('returns stats with a numeric messageCount for a non-partner queue', async () => {
    const req = makeReq({ params: { queueName: 'dev_jobs' } });
    const res = mockRes();
    const next = jest.fn();

    await dlqCtl.getDLQStats_get(req, res, next);

    // Either RabbitMQ is reachable (messageCount >= 0) or not (-1); the
    // response shape is always the same.
    expect(res.json).toHaveBeenCalled();
    expect(res._data).toHaveProperty('dlq');
    expect(typeof res._data.dlq.messageCount).toBe('number');
    expect(res._data.trackers).toBeUndefined();
  });

  it('returns stats with tracker data for a partner queue (DB is reachable)', async () => {
    await PartnerLogTracker.deleteMany({});
    const req = makeReq({ params: { queueName: 'partner_tasks' } });
    const res = mockRes();
    const next = jest.fn();

    await dlqCtl.getDLQStats_get(req, res, next);

    expect(res.json).toHaveBeenCalled();
    expect(res._data).toHaveProperty('dlq');
    // Partner queue: tracker stats and recent failures are always included.
    expect(res._data.trackers).toBeDefined();
    expect(res._data.recentFailures).toBeDefined();
    expect(Array.isArray(res._data.recentFailures)).toBe(true);
  });
});

// ---------------------------------------------------------------------------
describe('dlq controller – getDLQMessages_get', () => {
  it('throws when queueName param is missing', async () => {
    const req = makeReq({ params: {} });
    const res = mockRes();
    const next = jest.fn();

    await expect(dlqCtl.getDLQMessages_get(req, res, next)).rejects.toThrow();
  });
});

// ---------------------------------------------------------------------------
describe('dlq controller – processDLQ_post', () => {
  it('calls next() when queueName param is missing', async () => {
    const req = makeReq({ params: {}, body: {} });
    const res = mockRes();
    const next = jest.fn();

    await dlqCtl.processDLQ_post(req, res, next);

    expect(next).toHaveBeenCalled();
  });
});

// ---------------------------------------------------------------------------
describe('dlq controller – retryFailedTask_post', () => {
  it('calls next() when queueName is not a partner queue', async () => {
    const req = makeReq({ params: { queueName: 'dev_jobs', id: newId().toString() } });
    const res = mockRes();
    const next = jest.fn();

    await dlqCtl.retryFailedTask_post(req, res, next);

    expect(next).toHaveBeenCalled();
  });

  it('calls next() when tracker id does not exist in the DB', async () => {
    const req = makeReq({ params: { queueName: 'partner_tasks', id: newId().toString() } });
    const res = mockRes();
    const next = jest.fn();

    await dlqCtl.retryFailedTask_post(req, res, next);

    expect(next).toHaveBeenCalled();
  });
});

// ---------------------------------------------------------------------------
describe('dlq controller – archiveFailedTask_post', () => {
  it('calls next() when tracker id does not exist', async () => {
    const req = makeReq({ params: { id: newId().toString() }, body: { reason: 'test' } });
    const res = mockRes();
    const next = jest.fn();

    await dlqCtl.archiveFailedTask_post(req, res, next);

    expect(next).toHaveBeenCalled();
  });
});

// ---------------------------------------------------------------------------
describe('dlq controller – purgeDLQ_delete', () => {
  it('calls next() when confirm is not true', async () => {
    const req = makeReq({ params: { queueName: 'dev_jobs' }, body: { confirm: false } });
    const res = mockRes();
    const next = jest.fn();

    await dlqCtl.purgeDLQ_delete(req, res, next);

    expect(next).toHaveBeenCalled();
  });

  it('calls next() when queueName param is missing', async () => {
    const req = makeReq({ params: {}, body: { confirm: true } });
    const res = mockRes();
    const next = jest.fn();

    await dlqCtl.purgeDLQ_delete(req, res, next);

    expect(next).toHaveBeenCalled();
  });
});

// ---------------------------------------------------------------------------
describe('dlq controller – retryAllDLQ_post', () => {
  it('calls next() when queueName param is missing', async () => {
    const req = makeReq({ params: {}, body: {} });
    const res = mockRes();
    const next = jest.fn();

    await dlqCtl.retryAllDLQ_post(req, res, next);

    expect(next).toHaveBeenCalled();
  });
});

// ---------------------------------------------------------------------------
describe('dlq controller – retryDLQByPosition_post', () => {
  it('calls next() when position is missing from body', async () => {
    const req = makeReq({ params: { queueName: 'dev_jobs' }, body: {} });
    const res = mockRes();
    const next = jest.fn();

    await dlqCtl.retryDLQByPosition_post(req, res, next);

    expect(next).toHaveBeenCalled();
  });

  it('calls next() when position is negative', async () => {
    const req = makeReq({ params: { queueName: 'dev_jobs' }, body: { position: -1 } });
    const res = mockRes();
    const next = jest.fn();

    await dlqCtl.retryDLQByPosition_post(req, res, next);

    expect(next).toHaveBeenCalled();
  });
});

// ---------------------------------------------------------------------------
describe('dlq controller – retryDLQByHeader_post', () => {
  it('calls next() when headerName is missing', async () => {
    const req = makeReq({ params: { queueName: 'dev_jobs' }, body: { headerValue: 'val' } });
    const res = mockRes();
    const next = jest.fn();

    await dlqCtl.retryDLQByHeader_post(req, res, next);

    expect(next).toHaveBeenCalled();
  });

  it('calls next() when headerValue is missing', async () => {
    const req = makeReq({ params: { queueName: 'dev_jobs' }, body: { headerName: 'x-id' } });
    const res = mockRes();
    const next = jest.fn();

    await dlqCtl.retryDLQByHeader_post(req, res, next);

    expect(next).toHaveBeenCalled();
  });
});