import { describe, beforeEach, it, sinon, expect, angularMocks } from 'test/lib/common';

import '../all';

import moment from 'moment';
import helpers from 'test/specs/helpers';
import { Emitter } from 'app/core/core';

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

  beforeEach(angularMocks.module('grafana.core'));
  beforeEach(angularMocks.module('grafana.controllers'));
  beforeEach(angularMocks.module('grafana.services'));

  beforeEach(ctx.providePhase(['datasourceSrv', 'timeSrv', 'templateSrv', '$location']));
  beforeEach(
    angularMocks.inject(($rootScope, $q, $location, $injector) => {
      ctx.$q = $q;
      ctx.$rootScope = $rootScope;
      ctx.$location = $location;
      ctx.variableSrv = $injector.get('variableSrv');
      ctx.variableSrv.init({
        templating: { list: [] },
        events: new Emitter(),
        updateSubmenuVisibility: sinon.stub(),
      });
      ctx.$rootScope.$digest();
    })
  );

  function describeUpdateVariable(desc, fn) {
    describe(desc, function() {
      var scenario: any = {};
      scenario.setup = function(setupFn) {
        scenario.setupFn = setupFn;
      };

      beforeEach(function() {
        scenario.setupFn();
        var ds: any = {};
        ds.metricFindQuery = sinon.stub().returns(ctx.$q.when(scenario.queryResult));
        ctx.datasourceSrv.get = sinon.stub().returns(ctx.$q.when(ds));
        ctx.datasourceSrv.getMetricSources = sinon.stub().returns(scenario.metricSources);

        scenario.variable = ctx.variableSrv.createVariableFromModel(scenario.variableModel);
        ctx.variableSrv.addVariable(scenario.variable);

        ctx.variableSrv.updateOptions(scenario.variable);
        ctx.$rootScope.$digest();
      });

      fn(scenario);
    });
  }

  describeUpdateVariable('interval variable without auto', scenario => {
    scenario.setup(() => {
      scenario.variableModel = {
        type: 'interval',
        query: '1s,2h,5h,1d',
        name: 'test',
      };
    });

    it('should update options array', () => {
      expect(scenario.variable.options.length).to.be(4);
      expect(scenario.variable.options[0].text).to.be('1s');
      expect(scenario.variable.options[0].value).to.be('1s');
    });
  });

  //
  // Interval variable update
  //
  describeUpdateVariable('interval variable with auto', scenario => {
    scenario.setup(() => {
      scenario.variableModel = {
        type: 'interval',
        query: '1s,2h,5h,1d',
        name: 'test',
        auto: true,
        auto_count: 10,
      };

      var range = {
        from: moment(new Date())
          .subtract(7, 'days')
          .toDate(),
        to: new Date(),
      };

      ctx.timeSrv.timeRange = sinon.stub().returns(range);
      ctx.templateSrv.setGrafanaVariable = sinon.spy();
    });

    it('should update options array', function() {
      expect(scenario.variable.options.length).to.be(5);
      expect(scenario.variable.options[0].text).to.be('auto');
      expect(scenario.variable.options[0].value).to.be('$__auto_interval_test');
    });

    it('should set $__auto_interval_test', function() {
      var call = ctx.templateSrv.setGrafanaVariable.firstCall;
      expect(call.args[0]).to.be('$__auto_interval_test');
      expect(call.args[1]).to.be('12h');
    });

    // updateAutoValue() gets called twice: once directly once via VariableSrv.validateVariableSelectionState()
    // So use lastCall instead of a specific call number
    it('should set $__auto_interval', function() {
      var call = ctx.templateSrv.setGrafanaVariable.lastCall;
      expect(call.args[0]).to.be('$__auto_interval');
      expect(call.args[1]).to.be('12h');
    });
  });

  //
  // Query variable update
  //
  describeUpdateVariable('query variable with empty current object and refresh', function(scenario) {
    scenario.setup(function() {
      scenario.variableModel = {
        type: 'query',
        query: '',
        name: 'test',
        current: {},
      };
      scenario.queryResult = [{ text: 'backend1' }, { text: 'backend2' }];
    });

    it('should set current value to first option', function() {
      expect(scenario.variable.options.length).to.be(2);
      expect(scenario.variable.current.value).to.be('backend1');
    });
  });

  describeUpdateVariable(
    'query variable with multi select and new options does not contain some selected values',
    function(scenario) {
      scenario.setup(function() {
        scenario.variableModel = {
          type: 'query',
          query: '',
          name: 'test',
          current: {
            value: ['val1', 'val2', 'val3'],
            text: 'val1 + val2 + val3',
          },
        };
        scenario.queryResult = [{ text: 'val2' }, { text: 'val3' }];
      });

      it('should update current value', function() {
        expect(scenario.variable.current.value).to.eql(['val2', 'val3']);
        expect(scenario.variable.current.text).to.eql('val2 + val3');
      });
    }
  );

  describeUpdateVariable(
    'query variable with multi select and new options does not contain any selected values',
    function(scenario) {
      scenario.setup(function() {
        scenario.variableModel = {
          type: 'query',
          query: '',
          name: 'test',
          current: {
            value: ['val1', 'val2', 'val3'],
            text: 'val1 + val2 + val3',
          },
        };
        scenario.queryResult = [{ text: 'val5' }, { text: 'val6' }];
      });

      it('should update current value with first one', function() {
        expect(scenario.variable.current.value).to.eql('val5');
        expect(scenario.variable.current.text).to.eql('val5');
      });
    }
  );

  describeUpdateVariable('query variable with multi select and $__all selected', function(scenario) {
    scenario.setup(function() {
      scenario.variableModel = {
        type: 'query',
        query: '',
        name: 'test',
        includeAll: true,
        current: {
          value: ['$__all'],
          text: 'All',
        },
      };
      scenario.queryResult = [{ text: 'val5' }, { text: 'val6' }];
    });

    it('should keep current All value', function() {
      expect(scenario.variable.current.value).to.eql(['$__all']);
      expect(scenario.variable.current.text).to.eql('All');
    });
  });

  describeUpdateVariable('query variable with numeric results', function(scenario) {
    scenario.setup(function() {
      scenario.variableModel = {
        type: 'query',
        query: '',
        name: 'test',
        current: {},
      };
      scenario.queryResult = [{ text: 12, value: 12 }];
    });

    it('should set current value to first option', function() {
      expect(scenario.variable.current.value).to.be('12');
      expect(scenario.variable.options[0].value).to.be('12');
      expect(scenario.variable.options[0].text).to.be('12');
    });
  });

  describeUpdateVariable('basic query variable', function(scenario) {
    scenario.setup(function() {
      scenario.variableModel = { type: 'query', query: 'apps.*', name: 'test' };
      scenario.queryResult = [{ text: 'backend1' }, { text: 'backend2' }];
    });

    it('should update options array', function() {
      expect(scenario.variable.options.length).to.be(2);
      expect(scenario.variable.options[0].text).to.be('backend1');
      expect(scenario.variable.options[0].value).to.be('backend1');
      expect(scenario.variable.options[1].value).to.be('backend2');
    });

    it('should select first option as value', function() {
      expect(scenario.variable.current.value).to.be('backend1');
    });
  });

  describeUpdateVariable('and existing value still exists in options', function(scenario) {
    scenario.setup(function() {
      scenario.variableModel = { type: 'query', query: 'apps.*', name: 'test' };
      scenario.variableModel.current = { value: 'backend2', text: 'backend2' };
      scenario.queryResult = [{ text: 'backend1' }, { text: 'backend2' }];
    });

    it('should keep variable value', function() {
      expect(scenario.variable.current.text).to.be('backend2');
    });
  });

  describeUpdateVariable('and regex pattern exists', function(scenario) {
    scenario.setup(function() {
      scenario.variableModel = { type: 'query', query: 'apps.*', name: 'test' };
      scenario.variableModel.regex = '/apps.*(backend_[0-9]+)/';
      scenario.queryResult = [
        { text: 'apps.backend.backend_01.counters.req' },
        { text: 'apps.backend.backend_02.counters.req' },
      ];
    });

    it('should extract and use match group', function() {
      expect(scenario.variable.options[0].value).to.be('backend_01');
    });
  });

  describeUpdateVariable('and regex pattern exists and no match', function(scenario) {
    scenario.setup(function() {
      scenario.variableModel = { type: 'query', query: 'apps.*', name: 'test' };
      scenario.variableModel.regex = '/apps.*(backendasd[0-9]+)/';
      scenario.queryResult = [
        { text: 'apps.backend.backend_01.counters.req' },
        { text: 'apps.backend.backend_02.counters.req' },
      ];
    });

    it('should not add non matching items, None option should be added instead', function() {
      expect(scenario.variable.options.length).to.be(1);
      expect(scenario.variable.options[0].isNone).to.be(true);
    });
  });

  describeUpdateVariable('regex pattern without slashes', function(scenario) {
    scenario.setup(function() {
      scenario.variableModel = { type: 'query', query: 'apps.*', name: 'test' };
      scenario.variableModel.regex = 'backend_01';
      scenario.queryResult = [
        { text: 'apps.backend.backend_01.counters.req' },
        { text: 'apps.backend.backend_02.counters.req' },
      ];
    });

    it('should return matches options', function() {
      expect(scenario.variable.options.length).to.be(1);
    });
  });

  describeUpdateVariable('regex pattern remove duplicates', function(scenario) {
    scenario.setup(function() {
      scenario.variableModel = { type: 'query', query: 'apps.*', name: 'test' };
      scenario.variableModel.regex = '/backend_01/';
      scenario.queryResult = [
        { text: 'apps.backend.backend_01.counters.req' },
        { text: 'apps.backend.backend_01.counters.req' },
      ];
    });

    it('should return matches options', function() {
      expect(scenario.variable.options.length).to.be(1);
    });
  });

  describeUpdateVariable('with include All', function(scenario) {
    scenario.setup(function() {
      scenario.variableModel = {
        type: 'query',
        query: 'apps.*',
        name: 'test',
        includeAll: true,
      };
      scenario.queryResult = [{ text: 'backend1' }, { text: 'backend2' }, { text: 'backend3' }];
    });

    it('should add All option', function() {
      expect(scenario.variable.options[0].text).to.be('All');
      expect(scenario.variable.options[0].value).to.be('$__all');
    });
  });

  describeUpdateVariable('with include all and custom value', function(scenario) {
    scenario.setup(function() {
      scenario.variableModel = {
        type: 'query',
        query: 'apps.*',
        name: 'test',
        includeAll: true,
        allValue: '*',
      };
      scenario.queryResult = [{ text: 'backend1' }, { text: 'backend2' }, { text: 'backend3' }];
    });

    it('should add All option with custom value', function() {
      expect(scenario.variable.options[0].value).to.be('$__all');
    });
  });

  describeUpdateVariable('without sort', function(scenario) {
    scenario.setup(function() {
      scenario.variableModel = {
        type: 'query',
        query: 'apps.*',
        name: 'test',
        sort: 0,
      };
      scenario.queryResult = [{ text: 'bbb2' }, { text: 'aaa10' }, { text: 'ccc3' }];
    });

    it('should return options without sort', function() {
      expect(scenario.variable.options[0].text).to.be('bbb2');
      expect(scenario.variable.options[1].text).to.be('aaa10');
      expect(scenario.variable.options[2].text).to.be('ccc3');
    });
  });

  describeUpdateVariable('with alphabetical sort (asc)', function(scenario) {
    scenario.setup(function() {
      scenario.variableModel = {
        type: 'query',
        query: 'apps.*',
        name: 'test',
        sort: 1,
      };
      scenario.queryResult = [{ text: 'bbb2' }, { text: 'aaa10' }, { text: 'ccc3' }];
    });

    it('should return options with alphabetical sort', function() {
      expect(scenario.variable.options[0].text).to.be('aaa10');
      expect(scenario.variable.options[1].text).to.be('bbb2');
      expect(scenario.variable.options[2].text).to.be('ccc3');
    });
  });

  describeUpdateVariable('with alphabetical sort (desc)', function(scenario) {
    scenario.setup(function() {
      scenario.variableModel = {
        type: 'query',
        query: 'apps.*',
        name: 'test',
        sort: 2,
      };
      scenario.queryResult = [{ text: 'bbb2' }, { text: 'aaa10' }, { text: 'ccc3' }];
    });

    it('should return options with alphabetical sort', function() {
      expect(scenario.variable.options[0].text).to.be('ccc3');
      expect(scenario.variable.options[1].text).to.be('bbb2');
      expect(scenario.variable.options[2].text).to.be('aaa10');
    });
  });

  describeUpdateVariable('with numerical sort (asc)', function(scenario) {
    scenario.setup(function() {
      scenario.variableModel = {
        type: 'query',
        query: 'apps.*',
        name: 'test',
        sort: 3,
      };
      scenario.queryResult = [{ text: 'bbb2' }, { text: 'aaa10' }, { text: 'ccc3' }];
    });

    it('should return options with numerical sort', function() {
      expect(scenario.variable.options[0].text).to.be('bbb2');
      expect(scenario.variable.options[1].text).to.be('ccc3');
      expect(scenario.variable.options[2].text).to.be('aaa10');
    });
  });

  describeUpdateVariable('with numerical sort (desc)', function(scenario) {
    scenario.setup(function() {
      scenario.variableModel = {
        type: 'query',
        query: 'apps.*',
        name: 'test',
        sort: 4,
      };
      scenario.queryResult = [{ text: 'bbb2' }, { text: 'aaa10' }, { text: 'ccc3' }];
    });

    it('should return options with numerical sort', function() {
      expect(scenario.variable.options[0].text).to.be('aaa10');
      expect(scenario.variable.options[1].text).to.be('ccc3');
      expect(scenario.variable.options[2].text).to.be('bbb2');
    });
  });

  //
  // datasource variable update
  //
  describeUpdateVariable('datasource variable with regex filter', function(scenario) {
    scenario.setup(function() {
      scenario.variableModel = {
        type: 'datasource',
        query: 'graphite',
        name: 'test',
        current: { value: 'backend4_pee', text: 'backend4_pee' },
        regex: '/pee$/',
      };
      scenario.metricSources = [
        { name: 'backend1', meta: { id: 'influx' } },
        { name: 'backend2_pee', meta: { id: 'graphite' } },
        { name: 'backend3', meta: { id: 'graphite' } },
        { name: 'backend4_pee', meta: { id: 'graphite' } },
      ];
    });

    it('should set only contain graphite ds and filtered using regex', function() {
      expect(scenario.variable.options.length).to.be(2);
      expect(scenario.variable.options[0].value).to.be('backend2_pee');
      expect(scenario.variable.options[1].value).to.be('backend4_pee');
    });

    it('should keep current value if available', function() {
      expect(scenario.variable.current.value).to.be('backend4_pee');
    });
  });

  //
  // Custom variable update
  //
  describeUpdateVariable('update custom variable', function(scenario) {
    scenario.setup(function() {
      scenario.variableModel = {
        type: 'custom',
        query: 'hej, hop, asd',
        name: 'test',
      };
    });

    it('should update options array', function() {
      expect(scenario.variable.options.length).to.be(3);
      expect(scenario.variable.options[0].text).to.be('hej');
      expect(scenario.variable.options[1].value).to.be('hop');
    });
  });

  describe('multiple interval variables with auto', function() {
    var variable1, variable2;

    beforeEach(function() {
      var range = {
        from: moment(new Date())
          .subtract(7, 'days')
          .toDate(),
        to: new Date(),
      };
      ctx.timeSrv.timeRange = sinon.stub().returns(range);
      ctx.templateSrv.setGrafanaVariable = sinon.spy();

      var variableModel1 = {
        type: 'interval',
        query: '1s,2h,5h,1d',
        name: 'variable1',
        auto: true,
        auto_count: 10,
      };
      variable1 = ctx.variableSrv.createVariableFromModel(variableModel1);
      ctx.variableSrv.addVariable(variable1);

      var variableModel2 = {
        type: 'interval',
        query: '1s,2h,5h',
        name: 'variable2',
        auto: true,
        auto_count: 1000,
      };
      variable2 = ctx.variableSrv.createVariableFromModel(variableModel2);
      ctx.variableSrv.addVariable(variable2);

      ctx.variableSrv.updateOptions(variable1);
      ctx.variableSrv.updateOptions(variable2);
      ctx.$rootScope.$digest();
    });

    it('should update options array', function() {
      expect(variable1.options.length).to.be(5);
      expect(variable1.options[0].text).to.be('auto');
      expect(variable1.options[0].value).to.be('$__auto_interval_variable1');
      expect(variable2.options.length).to.be(4);
      expect(variable2.options[0].text).to.be('auto');
      expect(variable2.options[0].value).to.be('$__auto_interval_variable2');
    });

    it('should correctly set $__auto_interval_variableX', function() {
      var variable1Set,
        variable2Set,
        legacySet,
        unknownSet = false;
      // updateAutoValue() gets called repeatedly: once directly once via VariableSrv.validateVariableSelectionState()
      // So check that all calls are valid rather than expect a specific number and/or ordering of calls
      for (var i = 0; i < ctx.templateSrv.setGrafanaVariable.callCount; i++) {
        var call = ctx.templateSrv.setGrafanaVariable.getCall(i);
        switch (call.args[0]) {
          case '$__auto_interval_variable1':
            expect(call.args[1]).to.be('12h');
            variable1Set = true;
            break;
          case '$__auto_interval_variable2':
            expect(call.args[1]).to.be('10m');
            variable2Set = true;
            break;
          case '$__auto_interval':
            expect(call.args[1]).to.match(/^(12h|10m)$/);
            legacySet = true;
            break;
          default:
            unknownSet = true;
            break;
        }
      }
      expect(variable1Set).to.be.equal(true);
      expect(variable2Set).to.be.equal(true);
      expect(legacySet).to.be.equal(true);
      expect(unknownSet).to.be.equal(false);
    });
  });
});