import httpStatusCodes from '~/lib/utils/http_status';

import mutations from '~/monitoring/stores/mutations';
import * as types from '~/monitoring/stores/mutation_types';
import state from '~/monitoring/stores/state';
import { metricStates } from '~/monitoring/constants';
import {
  metricsDashboardPayload,
  deploymentData,
  metricsDashboardResponse,
  dashboardGitResponse,
} from '../mock_data';

describe('Monitoring mutations', () => {
  let stateCopy;

  beforeEach(() => {
    stateCopy = state();
  });
  describe('RECEIVE_METRICS_DATA_SUCCESS', () => {
    let payload;
    const getGroups = () => stateCopy.dashboard.panel_groups;

    beforeEach(() => {
      stateCopy.dashboard.panel_groups = [];
      payload = metricsDashboardPayload;
    });
    it('adds a key to the group', () => {
      mutations[types.RECEIVE_METRICS_DATA_SUCCESS](stateCopy, payload);
      const groups = getGroups();

      expect(groups[0].key).toBe('response-metrics-nginx-ingress-vts-0');
      expect(groups[1].key).toBe('system-metrics-kubernetes-1');
    });
    it('normalizes values', () => {
      mutations[types.RECEIVE_METRICS_DATA_SUCCESS](stateCopy, payload);
      const expectedLabel = 'Pod average';
      const { label, query_range } = getGroups()[1].panels[0].metrics[0];
      expect(label).toEqual(expectedLabel);
      expect(query_range.length).toBeGreaterThan(0);
    });
    it('contains two groups, with panels with a metric each', () => {
      mutations[types.RECEIVE_METRICS_DATA_SUCCESS](stateCopy, payload);

      const groups = getGroups();

      expect(groups).toBeDefined();
      expect(groups).toHaveLength(2);

      expect(groups[0].panels).toHaveLength(1);
      expect(groups[0].panels[0].metrics).toHaveLength(1);

      expect(groups[1].panels).toHaveLength(2);
      expect(groups[1].panels[0].metrics).toHaveLength(1);
      expect(groups[1].panels[1].metrics).toHaveLength(1);
    });
    it('assigns metrics a metric id', () => {
      mutations[types.RECEIVE_METRICS_DATA_SUCCESS](stateCopy, payload);

      const groups = getGroups();

      expect(groups[0].panels[0].metrics[0].metricId).toEqual(
        '1_response_metrics_nginx_ingress_throughput_status_code',
      );
      expect(groups[1].panels[0].metrics[0].metricId).toEqual(
        '17_system_metrics_kubernetes_container_memory_average',
      );
    });
  });

  describe('RECEIVE_DEPLOYMENTS_DATA_SUCCESS', () => {
    it('stores the deployment data', () => {
      stateCopy.deploymentData = [];
      mutations[types.RECEIVE_DEPLOYMENTS_DATA_SUCCESS](stateCopy, deploymentData);
      expect(stateCopy.deploymentData).toBeDefined();
      expect(stateCopy.deploymentData).toHaveLength(3);
      expect(typeof stateCopy.deploymentData[0]).toEqual('object');
    });
  });
  describe('SET_ENDPOINTS', () => {
    it('should set all the endpoints', () => {
      mutations[types.SET_ENDPOINTS](stateCopy, {
        metricsEndpoint: 'additional_metrics.json',
        deploymentsEndpoint: 'deployments.json',
        dashboardEndpoint: 'dashboard.json',
        projectPath: '/gitlab-org/gitlab-foss',
      });
      expect(stateCopy.metricsEndpoint).toEqual('additional_metrics.json');
      expect(stateCopy.deploymentsEndpoint).toEqual('deployments.json');
      expect(stateCopy.dashboardEndpoint).toEqual('dashboard.json');
      expect(stateCopy.projectPath).toEqual('/gitlab-org/gitlab-foss');
    });

    it('should not remove previously set properties', () => {
      const defaultLogsPath = stateCopy.logsPath;

      mutations[types.SET_ENDPOINTS](stateCopy, {
        logsPath: defaultLogsPath,
      });
      mutations[types.SET_ENDPOINTS](stateCopy, {
        dashboardEndpoint: 'dashboard.json',
      });
      mutations[types.SET_ENDPOINTS](stateCopy, {
        projectPath: '/gitlab-org/gitlab-foss',
      });

      expect(stateCopy).toMatchObject({
        logsPath: defaultLogsPath,
        dashboardEndpoint: 'dashboard.json',
        projectPath: '/gitlab-org/gitlab-foss',
      });
    });

    it('should not update unknown properties', () => {
      mutations[types.SET_ENDPOINTS](stateCopy, {
        dashboardEndpoint: 'dashboard.json',
        someOtherProperty: 'some invalid value', // someOtherProperty is not allowed
      });

      expect(stateCopy.dashboardEndpoint).toBe('dashboard.json');
      expect(stateCopy.someOtherProperty).toBeUndefined();
    });
  });

  describe('Individual panel/metric results', () => {
    const metricId = '12_system_metrics_kubernetes_container_memory_total';
    const result = [
      {
        values: [[0, 1], [1, 1], [1, 3]],
      },
    ];
    const { dashboard } = metricsDashboardResponse;
    const getMetric = () => stateCopy.dashboard.panel_groups[0].panels[0].metrics[0];

    describe('REQUEST_METRIC_RESULT', () => {
      beforeEach(() => {
        mutations[types.RECEIVE_METRICS_DATA_SUCCESS](stateCopy, dashboard);
      });
      it('stores a loading state on a metric', () => {
        expect(stateCopy.showEmptyState).toBe(true);

        mutations[types.REQUEST_METRIC_RESULT](stateCopy, {
          metricId,
          result,
        });

        expect(stateCopy.showEmptyState).toBe(true);
        expect(getMetric()).toEqual(
          expect.objectContaining({
            loading: true,
            result: null,
            state: metricStates.LOADING,
          }),
        );
      });
    });

    describe('RECEIVE_METRIC_RESULT_SUCCESS', () => {
      beforeEach(() => {
        mutations[types.RECEIVE_METRICS_DATA_SUCCESS](stateCopy, dashboard);
      });
      it('clears empty state', () => {
        expect(stateCopy.showEmptyState).toBe(true);

        mutations[types.RECEIVE_METRIC_RESULT_SUCCESS](stateCopy, {
          metricId,
          result,
        });

        expect(stateCopy.showEmptyState).toBe(false);
      });

      it('adds results to the store', () => {
        expect(getMetric().result).toBe(undefined);

        mutations[types.RECEIVE_METRIC_RESULT_SUCCESS](stateCopy, {
          metricId,
          result,
        });

        expect(getMetric().result).toHaveLength(result.length);
        expect(getMetric()).toEqual(
          expect.objectContaining({
            loading: false,
            state: metricStates.OK,
          }),
        );
      });
    });

    describe('RECEIVE_METRIC_RESULT_FAILURE', () => {
      beforeEach(() => {
        mutations[types.RECEIVE_METRICS_DATA_SUCCESS](stateCopy, dashboard);
      });
      it('maintains the loading state when a metric fails', () => {
        expect(stateCopy.showEmptyState).toBe(true);

        mutations[types.RECEIVE_METRIC_RESULT_FAILURE](stateCopy, {
          metricId,
          error: 'an error',
        });

        expect(stateCopy.showEmptyState).toBe(true);
      });

      it('stores a timeout error in a metric', () => {
        mutations[types.RECEIVE_METRIC_RESULT_FAILURE](stateCopy, {
          metricId,
          error: { message: 'BACKOFF_TIMEOUT' },
        });

        expect(getMetric()).toEqual(
          expect.objectContaining({
            loading: false,
            result: null,
            state: metricStates.TIMEOUT,
          }),
        );
      });

      it('stores a connection failed error in a metric', () => {
        mutations[types.RECEIVE_METRIC_RESULT_FAILURE](stateCopy, {
          metricId,
          error: {
            response: {
              status: httpStatusCodes.SERVICE_UNAVAILABLE,
            },
          },
        });
        expect(getMetric()).toEqual(
          expect.objectContaining({
            loading: false,
            result: null,
            state: metricStates.CONNECTION_FAILED,
          }),
        );
      });

      it('stores a bad data error in a metric', () => {
        mutations[types.RECEIVE_METRIC_RESULT_FAILURE](stateCopy, {
          metricId,
          error: {
            response: {
              status: httpStatusCodes.BAD_REQUEST,
            },
          },
        });

        expect(getMetric()).toEqual(
          expect.objectContaining({
            loading: false,
            result: null,
            state: metricStates.BAD_QUERY,
          }),
        );
      });

      it('stores an unknown error in a metric', () => {
        mutations[types.RECEIVE_METRIC_RESULT_FAILURE](stateCopy, {
          metricId,
          error: null, // no reason in response
        });

        expect(getMetric()).toEqual(
          expect.objectContaining({
            loading: false,
            result: null,
            state: metricStates.UNKNOWN_ERROR,
          }),
        );
      });
    });
  });
  describe('SET_ALL_DASHBOARDS', () => {
    it('stores `undefined` dashboards as an empty array', () => {
      mutations[types.SET_ALL_DASHBOARDS](stateCopy, undefined);

      expect(stateCopy.allDashboards).toEqual([]);
    });

    it('stores `null` dashboards as an empty array', () => {
      mutations[types.SET_ALL_DASHBOARDS](stateCopy, null);

      expect(stateCopy.allDashboards).toEqual([]);
    });

    it('stores dashboards loaded from the git repository', () => {
      mutations[types.SET_ALL_DASHBOARDS](stateCopy, dashboardGitResponse);
      expect(stateCopy.allDashboards).toEqual(dashboardGitResponse);
    });
  });
});