import { of } from 'rxjs';

import { DataQueryRequest, DataSourceApi, getDefaultTimeRange, LoadingState, PanelData } from '@grafana/data';

import { SceneTimeRange } from '../core/SceneTimeRange';

import { SceneQueryRunner } from './SceneQueryRunner';

const getDatasource = () => {
  return {
    getRef: () => ({ uid: 'test' }),
  };
};

jest.mock('app/features/plugins/datasource_srv', () => ({
  getDatasourceSrv: jest.fn(() => ({
    get: getDatasource,
  })),
}));

const runRequest = jest.fn().mockReturnValue(
  of<PanelData>({
    state: LoadingState.Done,
    series: [],
    timeRange: getDefaultTimeRange(),
  })
);

let sentRequest: DataQueryRequest | undefined;

jest.mock('app/features/query/state/runRequest', () => ({
  runRequest: (ds: DataSourceApi, request: DataQueryRequest) => {
    sentRequest = request;
    return runRequest(ds, request);
  },
}));

describe('SceneQueryRunner', () => {
  describe('when activated and got no data', () => {
    it('should run queries', async () => {
      const queryRunner = new SceneQueryRunner({
        queries: [{ refId: 'A' }],
        $timeRange: new SceneTimeRange(),
      });

      expect(queryRunner.state.data).toBeUndefined();

      queryRunner.activate();

      await new Promise((r) => setTimeout(r, 1));

      expect(queryRunner.state.data?.state).toBe(LoadingState.Done);
      // Default max data points
      expect(sentRequest?.maxDataPoints).toBe(500);
    });
  });

  describe('when activated and maxDataPointsFromWidth set to true', () => {
    it('should run queries', async () => {
      const queryRunner = new SceneQueryRunner({
        queries: [{ refId: 'A' }],
        $timeRange: new SceneTimeRange(),
        maxDataPointsFromWidth: true,
      });

      expect(queryRunner.state.data).toBeUndefined();

      queryRunner.activate();

      await new Promise((r) => setTimeout(r, 1));

      expect(queryRunner.state.data?.state).toBeUndefined();

      queryRunner.setContainerWidth(1000);

      expect(queryRunner.state.data?.state).toBeUndefined();

      await new Promise((r) => setTimeout(r, 1));

      expect(queryRunner.state.data?.state).toBe(LoadingState.Done);
    });
  });
});