define([
  'helpers',
  'features/panel/panelSrv',
  'features/panel/panelHelper',
  'panels/singlestat/module'
], function(helpers) {
  'use strict';

  describe('SingleStatCtrl', function() {
    var ctx = new helpers.ControllerTestContext();

    function singleStatScenario(desc, func) {

      describe(desc, function() {

        ctx.setup = function (setupFunc) {

          beforeEach(module('grafana.services'));
          beforeEach(module('grafana.panels.singlestat'));

          beforeEach(ctx.providePhase());
          beforeEach(ctx.createControllerPhase('SingleStatCtrl'));

          beforeEach(function() {
            setupFunc();
            ctx.datasource.query = sinon.stub().returns(ctx.$q.when({
              data: [ { target: 'test.cpu1', datapoints: ctx.datapoints } ]
            }));

            ctx.scope.refreshData(ctx.datasource);
            ctx.scope.$digest();
            ctx.data = ctx.scope.data;
          });
        };

        func(ctx);
      });
    }

    singleStatScenario('with defaults', function(ctx) {
      ctx.setup(function() {
        ctx.datapoints = [[10,1], [20,2]];
      });

      it('Should use series avg as default main value', function() {
        expect(ctx.data.value).to.be(15);
        expect(ctx.data.valueRounded).to.be(15);
      });

      it('should set formated falue', function() {
        expect(ctx.data.valueFormated).to.be('15');
      });
    });

    singleStatScenario('MainValue should use same number for decimals as displayed when checking thresholds', function(ctx) {
      ctx.setup(function() {
        ctx.datapoints = [[99.999,1], [99.99999,2]];
      });

      it('Should be rounded', function() {
        expect(ctx.data.value).to.be(99.999495);
        expect(ctx.data.valueRounded).to.be(100);
      });

      it('should set formated falue', function() {
        expect(ctx.data.valueFormated).to.be('100');
      });
    });

    singleStatScenario('When value to text mapping is specified', function(ctx) {
      ctx.setup(function() {
        ctx.datapoints = [[10,1]];
        ctx.scope.panel.valueMaps = [{value: '10', text: 'OK'}];
      });

      it('Should replace value with text', function() {
        expect(ctx.data.value).to.be(10);
        expect(ctx.data.valueFormated).to.be('OK');
      });

    });

  });
});