import { describe, beforeEach, it, expect, angularMocks } from 'test/lib/common';
import helpers from 'test/specs/helpers';
import { GraphiteDatasource } from '../datasource';
import moment from 'moment';
import _ from 'lodash';

describe('graphiteDatasource', function() {
  let ctx = new helpers.ServiceTestContext();
  let instanceSettings: any = { url: [''], name: 'graphiteProd', jsonData: {} };

  beforeEach(angularMocks.module('grafana.core'));
  beforeEach(angularMocks.module('grafana.services'));
  beforeEach(ctx.providePhase(['backendSrv', 'templateSrv']));
  beforeEach(
    angularMocks.inject(function($q, $rootScope, $httpBackend, $injector) {
      ctx.$q = $q;
      ctx.$httpBackend = $httpBackend;
      ctx.$rootScope = $rootScope;
      ctx.$injector = $injector;
      $httpBackend.when('GET', /\.html$/).respond('');
    })
  );

  beforeEach(function() {
    ctx.ds = ctx.$injector.instantiate(GraphiteDatasource, {
      instanceSettings: instanceSettings,
    });
  });

  describe('When querying graphite with one target using query editor target spec', function() {
    let query = {
      panelId: 3,
      rangeRaw: { from: 'now-1h', to: 'now' },
      targets: [{ target: 'prod1.count' }, { target: 'prod2.count' }],
      maxDataPoints: 500,
    };

    let results;
    let requestOptions;

    beforeEach(function() {
      ctx.backendSrv.datasourceRequest = function(options) {
        requestOptions = options;
        return ctx.$q.when({
          data: [{ target: 'prod1.count', datapoints: [[10, 1], [12, 1]] }],
        });
      };

      ctx.ds.query(query).then(function(data) {
        results = data;
      });
      ctx.$rootScope.$apply();
    });

    it('should generate the correct query', function() {
      expect(requestOptions.url).to.be('/render');
    });

    it('should set unique requestId', function() {
      expect(requestOptions.requestId).to.be('graphiteProd.panelId.3');
    });

    it('should query correctly', function() {
      let params = requestOptions.data.split('&');
      expect(params).to.contain('target=prod1.count');
      expect(params).to.contain('target=prod2.count');
      expect(params).to.contain('from=-1h');
      expect(params).to.contain('until=now');
    });

    it('should exclude undefined params', function() {
      let params = requestOptions.data.split('&');
      expect(params).to.not.contain('cacheTimeout=undefined');
    });

    it('should return series list', function() {
      expect(results.data.length).to.be(1);
      expect(results.data[0].target).to.be('prod1.count');
    });

    it('should convert to millisecond resolution', function() {
      expect(results.data[0].datapoints[0][0]).to.be(10);
    });
  });

  describe('when fetching Graphite Events as annotations', () => {
    let results;

    const options = {
      annotation: {
        tags: 'tag1',
      },
      range: {
        from: moment(1432288354),
        to: moment(1432288401),
      },
      rangeRaw: { from: 'now-24h', to: 'now' },
    };

    describe('and tags are returned as string', () => {
      const response = {
        data: [
          {
            when: 1507222850,
            tags: 'tag1 tag2',
            data: 'some text',
            id: 2,
            what: 'Event - deploy',
          },
        ],
      };

      beforeEach(() => {
        ctx.backendSrv.datasourceRequest = function(options) {
          return ctx.$q.when(response);
        };

        ctx.ds.annotationQuery(options).then(function(data) {
          results = data;
        });
        ctx.$rootScope.$apply();
      });

      it('should parse the tags string into an array', () => {
        expect(_.isArray(results[0].tags)).to.eql(true);
        expect(results[0].tags.length).to.eql(2);
        expect(results[0].tags[0]).to.eql('tag1');
        expect(results[0].tags[1]).to.eql('tag2');
      });
    });

    describe('and tags are returned as an array', () => {
      const response = {
        data: [
          {
            when: 1507222850,
            tags: ['tag1', 'tag2'],
            data: 'some text',
            id: 2,
            what: 'Event - deploy',
          },
        ],
      };
      beforeEach(() => {
        ctx.backendSrv.datasourceRequest = function(options) {
          return ctx.$q.when(response);
        };

        ctx.ds.annotationQuery(options).then(function(data) {
          results = data;
        });
        ctx.$rootScope.$apply();
      });

      it('should parse the tags string into an array', () => {
        expect(_.isArray(results[0].tags)).to.eql(true);
        expect(results[0].tags.length).to.eql(2);
        expect(results[0].tags[0]).to.eql('tag1');
        expect(results[0].tags[1]).to.eql('tag2');
      });
    });
  });

  describe('building graphite params', function() {
    it('should return empty array if no targets', function() {
      let results = ctx.ds.buildGraphiteParams({
        targets: [{}],
      });
      expect(results.length).to.be(0);
    });

    it('should uri escape targets', function() {
      let results = ctx.ds.buildGraphiteParams({
        targets: [{ target: 'prod1.{test,test2}' }, { target: 'prod2.count' }],
      });
      expect(results).to.contain('target=prod1.%7Btest%2Ctest2%7D');
    });

    it('should replace target placeholder', function() {
      let results = ctx.ds.buildGraphiteParams({
        targets: [{ target: 'series1' }, { target: 'series2' }, { target: 'asPercent(#A,#B)' }],
      });
      expect(results[2]).to.be('target=asPercent(series1%2Cseries2)');
    });

    it('should replace target placeholder for hidden series', function() {
      let results = ctx.ds.buildGraphiteParams({
        targets: [
          { target: 'series1', hide: true },
          { target: 'sumSeries(#A)', hide: true },
          { target: 'asPercent(#A,#B)' },
        ],
      });
      expect(results[0]).to.be('target=' + encodeURIComponent('asPercent(series1,sumSeries(series1))'));
    });

    it('should replace target placeholder when nesting query references', function() {
      let results = ctx.ds.buildGraphiteParams({
        targets: [{ target: 'series1' }, { target: 'sumSeries(#A)' }, { target: 'asPercent(#A,#B)' }],
      });
      expect(results[2]).to.be('target=' + encodeURIComponent('asPercent(series1,sumSeries(series1))'));
    });

    it('should fix wrong minute interval parameters', function() {
      let results = ctx.ds.buildGraphiteParams({
        targets: [{ target: "summarize(prod.25m.count, '25m', 'sum')" }],
      });
      expect(results[0]).to.be('target=' + encodeURIComponent("summarize(prod.25m.count, '25min', 'sum')"));
    });

    it('should fix wrong month interval parameters', function() {
      let results = ctx.ds.buildGraphiteParams({
        targets: [{ target: "summarize(prod.5M.count, '5M', 'sum')" }],
      });
      expect(results[0]).to.be('target=' + encodeURIComponent("summarize(prod.5M.count, '5mon', 'sum')"));
    });

    it('should ignore empty targets', function() {
      let results = ctx.ds.buildGraphiteParams({
        targets: [{ target: 'series1' }, { target: '' }],
      });
      expect(results.length).to.be(2);
    });
  });
});
