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

describe("ElasticDatasource", function() {
  var ctx = new helpers.ServiceTestContext();

  beforeEach(angularMocks.module("grafana.core"));
  beforeEach(angularMocks.module("grafana.services"));
  beforeEach(ctx.providePhase(["templateSrv", "backendSrv", "timeSrv"]));

  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("");
    })
  );

  function createDatasource(instanceSettings) {
    instanceSettings.jsonData = instanceSettings.jsonData || {};
    ctx.ds = ctx.$injector.instantiate(ElasticDatasource, {
      instanceSettings: instanceSettings
    });
  }

  describe("When testing datasource with index pattern", function() {
    beforeEach(function() {
      createDatasource({
        url: "http://es.com",
        index: "[asd-]YYYY.MM.DD",
        jsonData: { interval: "Daily", esVersion: "2" }
      });
    });

    it("should translate index pattern to current day", function() {
      var requestOptions;
      ctx.backendSrv.datasourceRequest = function(options) {
        requestOptions = options;
        return ctx.$q.when({ data: {} });
      };

      ctx.ds.testDatasource();
      ctx.$rootScope.$apply();

      var today = moment.utc().format("YYYY.MM.DD");
      expect(requestOptions.url).to.be(
        "http://es.com/asd-" + today + "/_mapping"
      );
    });
  });

  describe("When issueing metric query with interval pattern", function() {
    var requestOptions, parts, header;

    beforeEach(function() {
      createDatasource({
        url: "http://es.com",
        index: "[asd-]YYYY.MM.DD",
        jsonData: { interval: "Daily", esVersion: "2" }
      });

      ctx.backendSrv.datasourceRequest = function(options) {
        requestOptions = options;
        return ctx.$q.when({ data: { responses: [] } });
      };

      ctx.ds.query({
        range: {
          from: moment.utc([2015, 4, 30, 10]),
          to: moment.utc([2015, 5, 1, 10])
        },
        targets: [
          {
            bucketAggs: [],
            metrics: [{ type: "raw_document" }],
            query: "escape\\:test"
          }
        ]
      });

      ctx.$rootScope.$apply();

      parts = requestOptions.data.split("\n");
      header = angular.fromJson(parts[0]);
    });

    it("should translate index pattern to current day", function() {
      expect(header.index).to.eql([
        "asd-2015.05.30",
        "asd-2015.05.31",
        "asd-2015.06.01"
      ]);
    });

    it("should json escape lucene query", function() {
      var body = angular.fromJson(parts[1]);
      expect(body.query.bool.filter[1].query_string.query).to.be(
        "escape\\:test"
      );
    });
  });

  describe("When issueing document query", function() {
    var requestOptions, parts, header;

    beforeEach(function() {
      createDatasource({
        url: "http://es.com",
        index: "test",
        jsonData: { esVersion: "2" }
      });

      ctx.backendSrv.datasourceRequest = function(options) {
        requestOptions = options;
        return ctx.$q.when({ data: { responses: [] } });
      };

      ctx.ds.query({
        range: {
          from: moment([2015, 4, 30, 10]),
          to: moment([2015, 5, 1, 10])
        },
        targets: [
          {
            bucketAggs: [],
            metrics: [{ type: "raw_document" }],
            query: "test"
          }
        ]
      });

      ctx.$rootScope.$apply();
      parts = requestOptions.data.split("\n");
      header = angular.fromJson(parts[0]);
    });

    it("should set search type to query_then_fetch", function() {
      expect(header.search_type).to.eql("query_then_fetch");
    });

    it("should set size", function() {
      var body = angular.fromJson(parts[1]);
      expect(body.size).to.be(500);
    });
  });

  describe("When getting fields", function() {
    beforeEach(function() {
      createDatasource({ url: "http://es.com", index: "metricbeat" });

      ctx.backendSrv.datasourceRequest = function(options) {
        return ctx.$q.when({
          data: {
            metricbeat: {
              mappings: {
                metricsets: {
                  _all: {},
                  properties: {
                    "@timestamp": { type: "date" },
                    beat: {
                      properties: {
                        name: {
                          fields: { raw: { type: "keyword" } },
                          type: "string"
                        },
                        hostname: { type: "string" }
                      }
                    },
                    system: {
                      properties: {
                        cpu: {
                          properties: {
                            system: { type: "float" },
                            user: { type: "float" }
                          }
                        },
                        process: {
                          properties: {
                            cpu: {
                              properties: {
                                total: { type: "float" }
                              }
                            },
                            name: { type: "string" }
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        });
      };
    });

    it("should return nested fields", function() {
      ctx.ds
        .getFields({
          find: "fields",
          query: "*"
        })
        .then(fieldObjects => {
          var fields = _.map(fieldObjects, "text");
          expect(fields).to.eql([
            "@timestamp",
            "beat.name.raw",
            "beat.name",
            "beat.hostname",
            "system.cpu.system",
            "system.cpu.user",
            "system.process.cpu.total",
            "system.process.name"
          ]);
        });
      ctx.$rootScope.$apply();
    });

    it("should return fields related to query type", function() {
      ctx.ds
        .getFields({
          find: "fields",
          query: "*",
          type: "number"
        })
        .then(fieldObjects => {
          var fields = _.map(fieldObjects, "text");
          expect(fields).to.eql([
            "system.cpu.system",
            "system.cpu.user",
            "system.process.cpu.total"
          ]);
        });

      ctx.ds
        .getFields({
          find: "fields",
          query: "*",
          type: "date"
        })
        .then(fieldObjects => {
          var fields = _.map(fieldObjects, "text");
          expect(fields).to.eql(["@timestamp"]);
        });

      ctx.$rootScope.$apply();
    });
  });

  describe("When issuing aggregation query on es5.x", function() {
    var requestOptions, parts, header;

    beforeEach(function() {
      createDatasource({
        url: "http://es.com",
        index: "test",
        jsonData: { esVersion: "5" }
      });

      ctx.backendSrv.datasourceRequest = function(options) {
        requestOptions = options;
        return ctx.$q.when({ data: { responses: [] } });
      };

      ctx.ds.query({
        range: {
          from: moment([2015, 4, 30, 10]),
          to: moment([2015, 5, 1, 10])
        },
        targets: [
          {
            bucketAggs: [
              { type: "date_histogram", field: "@timestamp", id: "2" }
            ],
            metrics: [{ type: "count" }],
            query: "test"
          }
        ]
      });

      ctx.$rootScope.$apply();
      parts = requestOptions.data.split("\n");
      header = angular.fromJson(parts[0]);
    });

    it("should not set search type to count", function() {
      expect(header.search_type).to.not.eql("count");
    });

    it("should set size to 0", function() {
      var body = angular.fromJson(parts[1]);
      expect(body.size).to.be(0);
    });
  });

  describe("When issuing metricFind query on es5.x", function() {
    var requestOptions, parts, header, body, results;

    beforeEach(function() {
      createDatasource({
        url: "http://es.com",
        index: "test",
        jsonData: { esVersion: "5" }
      });

      ctx.backendSrv.datasourceRequest = function(options) {
        requestOptions = options;
        return ctx.$q.when({
          data: {
            responses: [
              {
                aggregations: {
                  "1": {
                    buckets: [
                      { doc_count: 1, key: "test" },
                      {
                        doc_count: 2,
                        key: "test2",
                        key_as_string: "test2_as_string"
                      }
                    ]
                  }
                }
              }
            ]
          }
        });
      };

      ctx.ds.metricFindQuery('{"find": "terms", "field": "test"}').then(res => {
        results = res;
      });

      ctx.$rootScope.$apply();

      parts = requestOptions.data.split("\n");
      header = angular.fromJson(parts[0]);
      body = angular.fromJson(parts[1]);
    });

    it("should get results", function() {
      expect(results.length).to.eql(2);
    });

    it("should use key or key_as_string", function() {
      expect(results[0].text).to.eql("test");
      expect(results[1].text).to.eql("test2_as_string");
    });

    it("should not set search type to count", function() {
      expect(header.search_type).to.not.eql("count");
    });

    it("should set size to 0", function() {
      expect(body.size).to.be(0);
    });

    it("should not set terms aggregation size to 0", function() {
      expect(body["aggs"]["1"]["terms"].size).to.not.be(0);
    });
  });
});