import { IngressProcessor } from './ingress.processor';
import { KeyedAsyncLock } from '../../integration/ordering-lock';

function job(overrides = {}) {
  return {
    data: {
      pluginId: 'chatwoot',
      instanceId: 'acct1',
      route: 'chatwoot',
      deliveryId: 'd1',
      payload: { headers: {}, query: {}, body: '{}', rawBody: '{}' },
    },
    attemptsMade: 0,
    opts: { attempts: 3 },
    ...overrides,
  } as never;
}

describe('IngressProcessor', () => {
  it('dispatches the event into the worker via dispatchWebhook', async () => {
    const dispatchWebhook = jest.fn().mockResolvedValue({ ok: true, status: 200 });
    const loader = { dispatchWebhookForInstance: dispatchWebhook };
    const failures = { save: jest.fn() };
    const proc = new IngressProcessor(loader as never, failures as never, { execute: jest.fn() } as never);
    await proc.process(job());
    expect(dispatchWebhook).toHaveBeenCalled();
  });

  it('records a DLQ failure row and fires ingress:error on the final attempt', async () => {
    const loader = { dispatchWebhookForInstance: jest.fn().mockRejectedValue(new Error('boom')) };
    const failures = { save: jest.fn().mockResolvedValue(undefined) };
    const hooks = { execute: jest.fn().mockResolvedValue({ continue: true }) };
    const proc = new IngressProcessor(loader as never, failures as never, hooks as never);
    await expect(proc.process(job({ attemptsMade: 2, opts: { attempts: 3 } }))).rejects.toThrow('boom');
    expect(failures.save).toHaveBeenCalledWith(
      expect.objectContaining({ direction: 'inbound', deliveryId: 'd1', pluginId: 'chatwoot' }),
    );
    expect(hooks.execute).toHaveBeenCalledWith('ingress:error', expect.anything(), expect.anything());
  });

  it('rethrows on a non-final attempt without recording a DLQ row or firing ingress:error', async () => {
    const loader = { dispatchWebhookForInstance: jest.fn().mockRejectedValue(new Error('boom')) };
    const failures = { save: jest.fn().mockResolvedValue(undefined) };
    const hooks = { execute: jest.fn().mockResolvedValue({ continue: true }) };
    const proc = new IngressProcessor(loader as never, failures as never, hooks as never);
    await expect(proc.process(job({ attemptsMade: 0, opts: { attempts: 3 } }))).rejects.toThrow('boom');
    expect(failures.save).not.toHaveBeenCalled();
    expect(hooks.execute).not.toHaveBeenCalled();
  });

  it('serializes two jobs for the same conversation and parallelizes different ones', async () => {
    const started: string[] = [];
    const finished: string[] = [];
    const loader = {
      dispatchWebhookForInstance: jest.fn(async (d: { deliveryId: string }) => {
        started.push(d.deliveryId);
        await new Promise(r => setTimeout(r, d.deliveryId === 'same-1' ? 20 : 1));
        finished.push(d.deliveryId);
      }),
    };
    const proc = new IngressProcessor(loader as never, { save: jest.fn() } as never, { execute: jest.fn() } as never);
    const mk = (deliveryId: string, convo: string) =>
      proc.process({
        data: {
          pluginId: 'p',
          instanceId: 'i',
          route: 'r',
          deliveryId,
          providerConversationId: convo,
          payload: { headers: {}, query: {}, body: '{}', rawBody: '{}' },
        },
        attemptsMade: 0,
        opts: { attempts: 3 },
      } as never);
    await Promise.all([mk('same-1', 'c1'), mk('same-2', 'c1')]);
    // Same conversation → same-1 finishes before same-2 starts.
    expect(finished.indexOf('same-1')).toBeLessThan(started.indexOf('same-2'));
  });

  it('parallelizes jobs for different conversations', async () => {
    let concurrent = 0;
    let maxConcurrent = 0;
    const loader = {
      dispatchWebhookForInstance: jest.fn(async () => {
        concurrent++;
        maxConcurrent = Math.max(maxConcurrent, concurrent);
        await new Promise(r => setTimeout(r, 10));
        concurrent--;
      }),
    };
    const proc = new IngressProcessor(loader as never, { save: jest.fn() } as never, { execute: jest.fn() } as never);
    const mk = (deliveryId: string, convo: string) =>
      proc.process({
        data: {
          pluginId: 'p',
          instanceId: 'i',
          route: 'r',
          deliveryId,
          providerConversationId: convo,
          payload: { headers: {}, query: {}, body: '{}', rawBody: '{}' },
        },
        attemptsMade: 0,
        opts: { attempts: 3 },
      } as never);
    await Promise.all([mk('d1', 'c1'), mk('d2', 'c2'), mk('d3', 'c3')]);
    expect(maxConcurrent).toBeGreaterThan(1);
  });
});

describe('KeyedAsyncLock import sanity', () => {
  it('is exported from the integration module for processor injection', () => {
    expect(new KeyedAsyncLock()).toBeInstanceOf(KeyedAsyncLock);
  });
});