/**
 * An ended (destroyed) alert is never an alarm.
 *
 * The server destroys an alert on delivery, expiry, owner disarm or delete, and
 * every action then 404s. A client must render that as a terminal ending — no
 * ring, no pending event, no invented replay — and must not retry an ack for it
 * forever.
 */
import AsyncStorage from '@react-native-async-storage/async-storage';
import { configureApi, ApiError } from '../src/services/apiClient';
import { ackAlarm, alarmStatus, isAlertGone } from '../src/services/alarmApi';
import { dropAck, enqueueAck, flushAcks, loadAcks } from '../src/services/pendingAcks';

jest.mock('@react-native-async-storage/async-storage', () => {
  const store = new Map<string, string>();
  return {
    __esModule: true,
    default: {
      getItem: jest.fn(async (k: string) => store.get(k) ?? null),
      setItem: jest.fn(async (k: string, v: string) => {
        store.set(k, v);
      }),
      removeItem: jest.fn(async (k: string) => {
        store.delete(k);
      }),
    },
  };
});

const g = globalThis as unknown as { fetch: typeof fetch };
const realFetch = g.fetch;

function stub(status: number, body: unknown): void {
  g.fetch = (async () => ({
    ok: status >= 200 && status < 300,
    status,
    text: async () => JSON.stringify(body),
    json: async () => body,
  })) as unknown as typeof fetch;
}

beforeEach(async () => {
  await AsyncStorage.removeItem('alarm.pendingAcks.v1');
  configureApi({
    baseUrl: 'http://instance.test',
    token: null,
    refreshToken: null,
    onUnauthorized: () => {},
    onSessionUpdate: () => {},
  });
});

afterEach(() => {
  g.fetch = realFetch;
});

describe('ended alerts never ring', () => {
  it('a 404 check-in is a terminal error, not an offline trigger', async () => {
    stub(404, { error: { code: 'ERR_ALERT_NOT_FOUND', message: 'alert not found' } });
    const err = await alarmStatus('alr_gone').catch(e => e);
    expect(err).toBeInstanceOf(ApiError);
    expect(err.status).toBe(404);
    expect(isAlertGone(err)).toBe(true);
    expect((err as ApiError).code).toBe('ERR_ALERT_NOT_FOUND');
    // Nothing success-shaped was produced, so no caller can ring from it.
    expect((err as { offlineTrigger?: boolean }).offlineTrigger).toBeUndefined();
  });

  it('a 404 ack is settled: the queued entry is dropped, not retried', async () => {
    await enqueueAck({ alertId: 'alr_gone', eventId: 'evt_1', deviceId: 'dev_x' });
    stub(404, { error: { code: 'ERR_ALERT_NOT_FOUND', message: 'alert not found' } });

    await flushAcks();

    expect(await loadAcks()).toEqual([]);
  });

  it('a transport failure keeps the entry queued for the next retry', async () => {
    await enqueueAck({ alertId: 'alr_1', eventId: 'evt_1', deviceId: 'dev_x' });
    g.fetch = (async () => {
      throw new Error('offline');
    }) as unknown as typeof fetch;

    await flushAcks();

    expect(await loadAcks()).toEqual([
      { alertId: 'alr_1', eventId: 'evt_1', deviceId: 'dev_x' },
    ]);
  });

  it('a successful ack clears the entry', async () => {
    await enqueueAck({ alertId: 'alr_1', eventId: 'evt_1', deviceId: 'dev_x' });
    stub(200, { cleared: 1 });

    await flushAcks();

    expect(await loadAcks()).toEqual([]);
  });
});

describe('ackAlarm wire shape', () => {
  it('sends alertId, eventId and deviceId with deviceId also in the query', async () => {
    const seen: { url: string; body?: string }[] = [];
    g.fetch = (async (url: string, init?: RequestInit) => {
      seen.push({ url, body: init?.body as string | undefined });
      return { ok: true, status: 200, text: async () => '{}', json: async () => ({}) };
    }) as unknown as typeof fetch;

    await ackAlarm({ alertId: 'alr_1', eventId: 'evt_1', deviceId: 'dev_abc' });

    expect(seen[0].url).toBe(
      'http://instance.test/api/alarm/action/ackAlarm?deviceId=dev_abc',
    );
    expect(JSON.parse(seen[0].body ?? '{}')).toEqual({
      payload: { alertId: 'alr_1', eventId: 'evt_1', deviceId: 'dev_abc' },
    });
  });

  it('drops a duplicate queued ack', async () => {
    await enqueueAck({ alertId: 'alr_1', eventId: 'evt_1', deviceId: 'dev_x' });
    await enqueueAck({ alertId: 'alr_1', eventId: 'evt_1', deviceId: 'dev_x' });
    expect(await loadAcks()).toHaveLength(1);
    await dropAck('alr_1', 'evt_1');
    expect(await loadAcks()).toEqual([]);
  });
});