package elasticsearch

import (
	"encoding/json"
	"flag"
	"fmt"
	"testing"
	"time"

	"github.com/grafana/grafana-plugin-sdk-go/backend"
	"github.com/grafana/grafana-plugin-sdk-go/experimental"
	es "github.com/grafana/grafana/pkg/tsdb/elasticsearch/client"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

var update = flag.Bool("update", true, "update golden files")

func TestResponseParser(t *testing.T) {
	t.Run("Elasticsearch response parser test", func(t *testing.T) {
		t.Run("Simple query and count", func(t *testing.T) {
			targets := map[string]string{
				"A": `{
					"timeField": "@timestamp",
					"metrics": [{ "type": "count", "id": "1" }],
          "bucketAggs": [{ "type": "date_histogram", "field": "@timestamp", "id": "2" }]
				}`,
			}
			response := `{
        "responses": [
          {
            "aggregations": {
              "2": {
                "buckets": [
                  {
                    "doc_count": 10,
                    "key": 1000
                  },
                  {
                    "doc_count": 15,
                    "key": 2000
                  }
                ]
              }
            }
          }
        ]
			}`
			rp, err := newResponseParserForTest(targets, response)
			require.NoError(t, err)
			result, err := rp.getTimeSeries()
			require.NoError(t, err)
			require.Len(t, result.Responses, 1)

			queryRes := result.Responses["A"]
			require.NotNil(t, queryRes)
			dataframes := queryRes.Frames
			require.Len(t, dataframes, 1)

			frame := dataframes[0]
			require.Len(t, frame.Fields, 2)

			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 2)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 2)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "Count")
		})

		t.Run("Simple query count & avg aggregation", func(t *testing.T) {
			targets := map[string]string{
				"A": `{
					"timeField": "@timestamp",
					"metrics": [{ "type": "count", "id": "1" }, {"type": "avg", "field": "value", "id": "2" }],
          "bucketAggs": [{ "type": "date_histogram", "field": "@timestamp", "id": "3" }]
				}`,
			}
			response := `{
        "responses": [
          {
            "aggregations": {
              "3": {
                "buckets": [
                  {
                    "2": { "value": 88 },
                    "doc_count": 10,
                    "key": 1000
                  },
                  {
                    "2": { "value": 99 },
                    "doc_count": 15,
                    "key": 2000
                  }
                ]
              }
            }
          }
        ]
			}`
			rp, err := newResponseParserForTest(targets, response)
			require.NoError(t, err)
			result, err := rp.getTimeSeries()
			require.NoError(t, err)
			require.Len(t, result.Responses, 1)

			queryRes := result.Responses["A"]
			require.NotNil(t, queryRes)
			dataframes := queryRes.Frames
			require.NoError(t, err)
			require.Len(t, dataframes, 2)

			frame := dataframes[0]
			require.Len(t, frame.Fields, 2)

			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 2)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 2)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "Count")

			frame = dataframes[1]
			require.Len(t, frame.Fields, 2)

			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 2)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 2)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "Average value")
		})

		t.Run("Single group by query one metric", func(t *testing.T) {
			targets := map[string]string{
				"A": `{
					"timeField": "@timestamp",
					"metrics": [{ "type": "count", "id": "1" }],
          "bucketAggs": [
						{ "type": "terms", "field": "host", "id": "2" },
						{ "type": "date_histogram", "field": "@timestamp", "id": "3" }
					]
				}`,
			}
			response := `{
        "responses": [
          {
            "aggregations": {
              "2": {
                "buckets": [
                  {
                    "3": {
                      "buckets": [{ "doc_count": 1, "key": 1000 }, { "doc_count": 3, "key": 2000 }]
                    },
                    "doc_count": 4,
                    "key": "server1"
                  },
                  {
                    "3": {
                      "buckets": [{ "doc_count": 2, "key": 1000 }, { "doc_count": 8, "key": 2000 }]
                    },
                    "doc_count": 10,
                    "key": "server2"
                  }
                ]
              }
            }
          }
        ]
			}`
			rp, err := newResponseParserForTest(targets, response)
			require.NoError(t, err)
			result, err := rp.getTimeSeries()
			require.NoError(t, err)

			queryRes := result.Responses["A"]
			require.NotNil(t, queryRes)
			dataframes := queryRes.Frames
			require.NoError(t, err)
			require.Len(t, dataframes, 2)

			frame := dataframes[0]
			require.Len(t, frame.Fields, 2)
			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 2)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 2)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "server1")

			frame = dataframes[1]
			require.Len(t, frame.Fields, 2)
			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 2)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 2)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "server2")
		})

		t.Run("Single group by query two metrics", func(t *testing.T) {
			targets := map[string]string{
				"A": `{
					"timeField": "@timestamp",
					"metrics": [{ "type": "count", "id": "1" }, { "type": "avg", "field": "@value", "id": "4" }],
          "bucketAggs": [
						{ "type": "terms", "field": "host", "id": "2" },
						{ "type": "date_histogram", "field": "@timestamp", "id": "3" }
					]
				}`,
			}
			response := `{
        "responses": [
          {
            "aggregations": {
              "2": {
                "buckets": [
                  {
                    "3": {
                      "buckets": [
                        { "4": { "value": 10 }, "doc_count": 1, "key": 1000 },
                        { "4": { "value": 12 }, "doc_count": 3, "key": 2000 }
                      ]
                    },
                    "doc_count": 4,
                    "key": "server1"
                  },
                  {
                    "3": {
                      "buckets": [
                        { "4": { "value": 20 }, "doc_count": 1, "key": 1000 },
                        { "4": { "value": 32 }, "doc_count": 3, "key": 2000 }
                      ]
                    },
                    "doc_count": 10,
                    "key": "server2"
                  }
                ]
              }
            }
          }
        ]
			}`
			rp, err := newResponseParserForTest(targets, response)
			require.NoError(t, err)
			result, err := rp.getTimeSeries()
			require.NoError(t, err)
			require.Len(t, result.Responses, 1)

			queryRes := result.Responses["A"]
			require.NotNil(t, queryRes)
			dataframes := queryRes.Frames
			require.NoError(t, err)
			require.Len(t, dataframes, 4)

			frame := dataframes[0]
			require.Len(t, frame.Fields, 2)
			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 2)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 2)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "server1 Count")

			frame = dataframes[1]
			require.Len(t, frame.Fields, 2)
			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 2)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 2)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "server1 Average @value")

			frame = dataframes[2]
			require.Len(t, frame.Fields, 2)
			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 2)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 2)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "server2 Count")

			frame = dataframes[3]
			require.Len(t, frame.Fields, 2)
			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 2)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 2)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "server2 Average @value")
		})

		t.Run("With percentiles", func(t *testing.T) {
			targets := map[string]string{
				"A": `{
					"timeField": "@timestamp",
					"metrics": [{ "type": "percentiles", "settings": { "percents": [75, 90] }, "id": "1" }],
          "bucketAggs": [{ "type": "date_histogram", "field": "@timestamp", "id": "3" }]
				}`,
			}
			response := `{
        "responses": [
          {
            "aggregations": {
              "3": {
                "buckets": [
                  {
                    "1": { "values": { "75": 3.3, "90": 5.5 } },
                    "doc_count": 10,
                    "key": 1000
                  },
                  {
                    "1": { "values": { "75": 2.3, "90": 4.5 } },
                    "doc_count": 15,
                    "key": 2000
                  }
                ]
              }
            }
          }
        ]
			}`
			rp, err := newResponseParserForTest(targets, response)
			require.NoError(t, err)
			result, err := rp.getTimeSeries()
			require.NoError(t, err)
			require.Len(t, result.Responses, 1)

			queryRes := result.Responses["A"]
			require.NotNil(t, queryRes)
			dataframes := queryRes.Frames
			require.NoError(t, err)
			require.Len(t, dataframes, 2)

			frame := dataframes[0]
			require.Len(t, frame.Fields, 2)
			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 2)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 2)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "p75")

			frame = dataframes[1]
			require.Len(t, frame.Fields, 2)
			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 2)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 2)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "p90")
		})

		t.Run("With extended stats", func(t *testing.T) {
			targets := map[string]string{
				"A": `{
					"timeField": "@timestamp",
					"metrics": [{ "type": "extended_stats", "meta": { "max": true, "std_deviation_bounds_upper": true, "std_deviation_bounds_lower": true }, "id": "1" }],
          "bucketAggs": [
						{ "type": "terms", "field": "host", "id": "3" },
						{ "type": "date_histogram", "field": "@timestamp", "id": "4" }
					]
				}`,
			}
			response := `{
        "responses": [
          {
            "aggregations": {
              "3": {
                "buckets": [
                  {
                    "key": "server1",
                    "4": {
                      "buckets": [
                        {
                          "1": {
                            "max": 10.2,
                            "min": 5.5,
                            "std_deviation_bounds": { "upper": 3, "lower": -2 }
                          },
                          "doc_count": 10,
                          "key": 1000
                        }
                      ]
                    }
                  },
                  {
                    "key": "server2",
                    "4": {
                      "buckets": [
                        {
                          "1": {
                            "max": 15.5,
                            "min": 3.4,
                            "std_deviation_bounds": { "upper": 4, "lower": -1 }
                          },
                          "doc_count": 10,
                          "key": 1000
                        }
                      ]
                    }
                  }
                ]
              }
            }
          }
        ]
			}`
			rp, err := newResponseParserForTest(targets, response)
			require.NoError(t, err)
			result, err := rp.getTimeSeries()
			require.NoError(t, err)
			require.Len(t, result.Responses, 1)

			queryRes := result.Responses["A"]
			require.NotNil(t, queryRes)
			dataframes := queryRes.Frames
			require.NoError(t, err)
			require.Len(t, dataframes, 6)

			frame := dataframes[0]
			require.Len(t, frame.Fields, 2)
			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 1)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 1)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "server1 Max")

			frame = dataframes[1]
			require.Len(t, frame.Fields, 2)
			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 1)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 1)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "server1 Std Dev Lower")

			frame = dataframes[2]
			require.Len(t, frame.Fields, 2)
			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 1)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 1)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "server1 Std Dev Upper")

			frame = dataframes[3]
			require.Len(t, frame.Fields, 2)
			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 1)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 1)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "server2 Max")

			frame = dataframes[4]
			require.Len(t, frame.Fields, 2)
			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 1)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 1)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "server2 Std Dev Lower")

			frame = dataframes[5]
			require.Len(t, frame.Fields, 2)
			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 1)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 1)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "server2 Std Dev Upper")
		})

		t.Run("Single group by with alias pattern", func(t *testing.T) {
			targets := map[string]string{
				"A": `{
					"timeField": "@timestamp",
					"alias": "{{term @host}} {{metric}} and {{not_exist}} {{@host}}",
					"metrics": [{ "type": "count", "id": "1" }],
          "bucketAggs": [
						{ "type": "terms", "field": "@host", "id": "2" },
						{ "type": "date_histogram", "field": "@timestamp", "id": "3" }
					]
				}`,
			}
			response := `{
        "responses": [
          {
            "aggregations": {
              "2": {
                "buckets": [
                  {
                    "3": {
                      "buckets": [{ "doc_count": 1, "key": 1000 }, { "doc_count": 3, "key": 2000 }]
                    },
                    "doc_count": 4,
                    "key": "server1"
                  },
                  {
                    "3": {
                      "buckets": [{ "doc_count": 2, "key": 1000 }, { "doc_count": 8, "key": 2000 }]
                    },
                    "doc_count": 10,
                    "key": "server2"
                  },
                  {
                    "3": {
                      "buckets": [{ "doc_count": 2, "key": 1000 }, { "doc_count": 8, "key": 2000 }]
                    },
                    "doc_count": 10,
                    "key": 0
                  }
                ]
              }
            }
          }
        ]
			}`
			rp, err := newResponseParserForTest(targets, response)
			require.NoError(t, err)
			result, err := rp.getTimeSeries()
			require.NoError(t, err)
			require.Len(t, result.Responses, 1)

			queryRes := result.Responses["A"]
			require.NotNil(t, queryRes)
			dataframes := queryRes.Frames
			require.NoError(t, err)
			require.Len(t, dataframes, 3)

			frame := dataframes[0]
			require.Len(t, frame.Fields, 2)
			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 2)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 2)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "server1 Count and {{not_exist}} server1")

			frame = dataframes[1]
			require.Len(t, frame.Fields, 2)
			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 2)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 2)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "server2 Count and {{not_exist}} server2")

			frame = dataframes[2]
			require.Len(t, frame.Fields, 2)
			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 2)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 2)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "0 Count and {{not_exist}} 0")
		})

		t.Run("Histogram response", func(t *testing.T) {
			targets := map[string]string{
				"A": `{
					"timeField": "@timestamp",
					"metrics": [{ "type": "count", "id": "1" }],
         "bucketAggs": [{ "type": "histogram", "field": "bytes", "id": "3" }]
				}`,
			}
			response := `{
        "responses": [
         {
           "aggregations": {
             "3": {
               "buckets": [{ "doc_count": 1, "key": 1000 }, { "doc_count": 3, "key": 2000 }, { "doc_count": 2, "key": 3000 }]
             }
           }
         }
        ]
			}`
			rp, err := newResponseParserForTest(targets, response)
			require.NoError(t, err)
			result, err := rp.getTimeSeries()
			require.NoError(t, err)
			require.Len(t, result.Responses, 1)

			queryRes := result.Responses["A"]
			require.NotNil(t, queryRes)
			dataframes := queryRes.Frames
			require.NoError(t, err)
			require.Len(t, dataframes, 1)
		})

		t.Run("With two filters agg", func(t *testing.T) {
			targets := map[string]string{
				"A": `{
					"timeField": "@timestamp",
					"metrics": [{ "type": "count", "id": "1" }],
          "bucketAggs": [
						{
							"type": "filters",
							"id": "2",
							"settings": {
								"filters": [{ "query": "@metric:cpu" }, { "query": "@metric:logins.count" }]
							}
						},
						{ "type": "date_histogram", "field": "@timestamp", "id": "3" }
					]
				}`,
			}
			response := `{
        "responses": [
          {
            "aggregations": {
              "2": {
                "buckets": {
                  "@metric:cpu": {
                    "3": {
                      "buckets": [{ "doc_count": 1, "key": 1000 }, { "doc_count": 3, "key": 2000 }]
                    }
                  },
                  "@metric:logins.count": {
                    "3": {
                      "buckets": [{ "doc_count": 2, "key": 1000 }, { "doc_count": 8, "key": 2000 }]
                    }
                  }
                }
              }
            }
          }
        ]
			}`
			rp, err := newResponseParserForTest(targets, response)
			require.NoError(t, err)
			result, err := rp.getTimeSeries()
			require.NoError(t, err)
			require.Len(t, result.Responses, 1)

			queryRes := result.Responses["A"]
			require.NotNil(t, queryRes)
			dataframes := queryRes.Frames
			require.NoError(t, err)
			require.Len(t, dataframes, 2)

			frame := dataframes[0]
			require.Len(t, frame.Fields, 2)
			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 2)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 2)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "@metric:cpu")

			frame = dataframes[1]
			require.Len(t, frame.Fields, 2)
			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 2)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 2)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "@metric:logins.count")
		})

		t.Run("With drop first and last aggregation (numeric)", func(t *testing.T) {
			targets := map[string]string{
				"A": `{
					"timeField": "@timestamp",
					"metrics": [{ "type": "avg", "id": "1" }, { "type": "count" }],
          "bucketAggs": [
						{
							"type": "date_histogram",
							"field": "@timestamp",
							"id": "2",
							"settings": { "trimEdges": 1 }
						}
					]
				}`,
			}
			response := `{
        "responses": [
          {
            "aggregations": {
              "2": {
                "buckets": [
                  {
                    "1": { "value": 1000 },
                    "key": 1,
                    "doc_count": 369
                  },
                  {
                    "1": { "value": 2000 },
                    "key": 2,
                    "doc_count": 200
                  },
                  {
                    "1": { "value": 2000 },
                    "key": 3,
                    "doc_count": 200
                  }
                ]
              }
            }
          }
        ]
			}`
			rp, err := newResponseParserForTest(targets, response)
			require.NoError(t, err)
			result, err := rp.getTimeSeries()
			require.NoError(t, err)
			require.Len(t, result.Responses, 1)

			queryRes := result.Responses["A"]
			require.NotNil(t, queryRes)
			dataframes := queryRes.Frames
			require.NoError(t, err)
			require.Len(t, dataframes, 2)

			frame := dataframes[0]
			require.Len(t, frame.Fields, 2)
			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 1)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 1)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "Average")

			frame = dataframes[1]
			require.Len(t, frame.Fields, 2)
			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 1)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 1)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "Count")
		})

		t.Run("With drop first and last aggregation (string)", func(t *testing.T) {
			targets := map[string]string{
				"A": `{
					"timeField": "@timestamp",
					"metrics": [{ "type": "avg", "id": "1" }, { "type": "count" }],
          "bucketAggs": [
						{
							"type": "date_histogram",
							"field": "@timestamp",
							"id": "2",
							"settings": { "trimEdges": "1" }
						}
					]
				}`,
			}
			response := `{
        "responses": [
          {
            "aggregations": {
              "2": {
                "buckets": [
                  {
                    "1": { "value": 1000 },
                    "key": 1,
                    "doc_count": 369
                  },
                  {
                    "1": { "value": 2000 },
                    "key": 2,
                    "doc_count": 200
                  },
                  {
                    "1": { "value": 2000 },
                    "key": 3,
                    "doc_count": 200
                  }
                ]
              }
            }
          }
        ]
			}`
			rp, err := newResponseParserForTest(targets, response)
			require.NoError(t, err)
			result, err := rp.getTimeSeries()
			require.NoError(t, err)
			require.Len(t, result.Responses, 1)

			queryRes := result.Responses["A"]
			require.NotNil(t, queryRes)
			dataframes := queryRes.Frames
			require.NoError(t, err)
			require.Len(t, dataframes, 2)

			frame := dataframes[0]
			require.Len(t, frame.Fields, 2)
			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 1)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 1)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "Average")

			frame = dataframes[1]
			require.Len(t, frame.Fields, 2)
			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 1)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 1)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "Count")
		})

		t.Run("Larger trimEdges value", func(t *testing.T) {
			targets := map[string]string{
				"A": `{
					"timeField": "@timestamp",
					"metrics": [{ "type": "count" }],
          "bucketAggs": [
						{
							"type": "date_histogram",
							"field": "@timestamp",
							"id": "2",
							"settings": { "trimEdges": "3" }
						}
					]
				}`,
			}
			response := `{
        "responses": [
          {
            "aggregations": {
              "2": {
                "buckets": [
                  { "key": 1000, "doc_count": 10},
                  { "key": 2000, "doc_count": 20},
                  { "key": 3000, "doc_count": 30},
                  { "key": 4000, "doc_count": 40},
                  { "key": 5000, "doc_count": 50},
                  { "key": 6000, "doc_count": 60},
                  { "key": 7000, "doc_count": 70},
                  { "key": 8000, "doc_count": 80},
                  { "key": 9000, "doc_count": 90}
                ]
              }
            }
          }
        ]
			}`
			rp, err := newResponseParserForTest(targets, response)

			require.NoError(t, err)
			result, err := rp.getTimeSeries()
			require.NoError(t, err)
			require.Len(t, result.Responses, 1)

			queryRes := result.Responses["A"]
			require.NotNil(t, queryRes)

			experimental.CheckGoldenJSONResponse(t, "testdata", "trimedges_string.golden", &queryRes, *update)
		})

		t.Run("No group by time", func(t *testing.T) {
			targets := map[string]string{
				"A": `{
					"timeField": "@timestamp",
					"metrics": [{ "type": "avg", "id": "1" }, { "type": "count" }],
         "bucketAggs": [{ "type": "terms", "field": "host", "id": "2" }]
				}`,
			}
			response := `{
        "responses": [
         {
           "aggregations": {
             "2": {
               "buckets": [
                 {
                   "1": { "value": 1000 },
                   "key": "server-1",
                   "doc_count": 369
                 },
                 {
                   "1": { "value": 2000 },
                   "key": "server-2",
                   "doc_count": 200
                 }
               ]
             }
           }
         }
        ]
			}`
			rp, err := newResponseParserForTest(targets, response)
			require.NoError(t, err)
			result, err := rp.getTimeSeries()
			require.NoError(t, err)
			require.Len(t, result.Responses, 1)

			queryRes := result.Responses["A"]
			require.NotNil(t, queryRes)
			dataframes := queryRes.Frames
			require.NoError(t, err)
			require.Len(t, dataframes, 1)

			frame := dataframes[0]
			require.Len(t, frame.Fields, 3)
			require.Equal(t, frame.Fields[0].Name, "host")
			require.Equal(t, frame.Fields[0].Len(), 2)
			require.Equal(t, frame.Fields[1].Name, "Average")
			require.Equal(t, frame.Fields[1].Len(), 2)
			require.Equal(t, frame.Fields[2].Name, "Count")
			require.Equal(t, frame.Fields[2].Len(), 2)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "")
		})

		t.Run("Multiple metrics of same type", func(t *testing.T) {
			targets := map[string]string{
				"A": `{
					"timeField": "@timestamp",
					"metrics": [{ "type": "avg", "field": "test", "id": "1" }, { "type": "avg", "field": "test2", "id": "2" }],
          "bucketAggs": [{ "type": "terms", "field": "host", "id": "2" }]
				}`,
			}
			response := `{
        "responses": [
          {
            "aggregations": {
              "2": {
                "buckets": [
                  {
                    "1": { "value": 1000 },
                    "2": { "value": 3000 },
                    "key": "server-1",
                    "doc_count": 369
                  }
                ]
              }
            }
          }
        ]
			}`
			rp, err := newResponseParserForTest(targets, response)
			require.NoError(t, err)
			result, err := rp.getTimeSeries()
			require.NoError(t, err)
			require.Len(t, result.Responses, 1)

			queryRes := result.Responses["A"]
			require.NotNil(t, queryRes)
			dataframes := queryRes.Frames
			require.NoError(t, err)
			require.Len(t, dataframes, 1)

			frame := dataframes[0]
			require.Len(t, frame.Fields, 3)
			require.Equal(t, frame.Fields[0].Name, "host")
			require.Equal(t, frame.Fields[0].Len(), 1)
			require.Equal(t, frame.Fields[1].Name, "Average test")
			require.Equal(t, frame.Fields[1].Len(), 1)
			require.Equal(t, frame.Fields[2].Name, "Average test2")
			require.Equal(t, frame.Fields[2].Len(), 1)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "")
		})

		t.Run("With bucket_script", func(t *testing.T) {
			targets := map[string]string{
				"A": `{
					"timeField": "@timestamp",
					"metrics": [
						{ "id": "1", "type": "sum", "field": "@value" },
            { "id": "3", "type": "max", "field": "@value" },
            {
              "id": "4",
              "field": "select field",
              "pipelineVariables": [{ "name": "var1", "pipelineAgg": "1" }, { "name": "var2", "pipelineAgg": "3" }],
              "settings": { "script": "params.var1 * params.var2" },
              "type": "bucket_script"
            }
					],
          "bucketAggs": [{ "type": "date_histogram", "field": "@timestamp", "id": "2" }]
				}`,
			}
			response := `{
        "responses": [
          {
            "aggregations": {
              "2": {
                "buckets": [
                  {
                    "1": { "value": 2 },
                    "3": { "value": 3 },
                    "4": { "value": 6 },
                    "doc_count": 60,
                    "key": 1000
                  },
                  {
                    "1": { "value": 3 },
                    "3": { "value": 4 },
                    "4": { "value": 12 },
                    "doc_count": 60,
                    "key": 2000
                  }
                ]
              }
            }
          }
        ]
			}`
			rp, err := newResponseParserForTest(targets, response)
			require.NoError(t, err)
			result, err := rp.getTimeSeries()
			require.NoError(t, err)
			require.Len(t, result.Responses, 1)

			queryRes := result.Responses["A"]
			require.NotNil(t, queryRes)
			dataframes := queryRes.Frames
			require.NoError(t, err)
			require.Len(t, dataframes, 3)

			frame := dataframes[0]
			require.Len(t, frame.Fields, 2)
			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 2)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 2)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "Sum @value")

			frame = dataframes[1]
			require.Len(t, frame.Fields, 2)
			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 2)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 2)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "Max @value")

			frame = dataframes[2]
			require.Len(t, frame.Fields, 2)
			require.Equal(t, frame.Fields[0].Name, "time")
			require.Equal(t, frame.Fields[0].Len(), 2)
			require.Equal(t, frame.Fields[1].Name, "value")
			require.Equal(t, frame.Fields[1].Len(), 2)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "Sum @value * Max @value")
		})

		t.Run("Terms with two bucket_script", func(t *testing.T) {
			targets := map[string]string{
				"A": `{
					"timeField": "@timestamp",
					"metrics": [
						{ "id": "1", "type": "sum", "field": "@value" },
            			{ "id": "3", "type": "max", "field": "@value" },
            			{
              				"id": "4",
              				"field": "select field",
              				"pipelineVariables": [{ "name": "var1", "pipelineAgg": "1" }, { "name": "var2", "pipelineAgg": "3" }],
              				"settings": { "script": "params.var1 * params.var2" },
              				"type": "bucket_script"
						},
            			{
							"id": "5",
							"field": "select field",
							"pipelineVariables": [{ "name": "var1", "pipelineAgg": "1" }, { "name": "var2", "pipelineAgg": "3" }],
							"settings": { "script": "params.var1 * params.var2 * 2" },
							"type": "bucket_script"
					  }
					],
          "bucketAggs": [{ "type": "terms", "field": "@timestamp", "id": "2" }]
				}`,
			}
			response := `{
				"responses": [
					{
						"aggregations": {
						"2": {
							"buckets": [
							{
								"1": { "value": 2 },
								"3": { "value": 3 },
								"4": { "value": 6 },
								"5": { "value": 24 },
								"doc_count": 60,
								"key": 1000
							},
							{
								"1": { "value": 3 },
								"3": { "value": 4 },
								"4": { "value": 12 },
								"5": { "value": 48 },
								"doc_count": 60,
								"key": 2000
							}
							]
						}
						}
					}
				]
			}`
			rp, err := newResponseParserForTest(targets, response)
			require.NoError(t, err)
			result, err := rp.getTimeSeries()
			require.NoError(t, err)
			require.Len(t, result.Responses, 1)

			queryRes := result.Responses["A"]
			require.NotNil(t, queryRes)
			dataframes := queryRes.Frames
			require.NoError(t, err)
			require.Len(t, dataframes, 1)

			frame := dataframes[0]
			require.Len(t, frame.Fields, 5)
			require.Equal(t, frame.Fields[0].Name, "@timestamp")
			require.Equal(t, frame.Fields[0].Len(), 2)
			require.Equal(t, frame.Fields[1].Name, "Sum")
			require.Equal(t, frame.Fields[1].Len(), 2)
			require.Equal(t, frame.Fields[2].Name, "Max")
			require.Equal(t, frame.Fields[2].Len(), 2)
			require.Equal(t, frame.Fields[3].Name, "params.var1 * params.var2")
			require.Equal(t, frame.Fields[3].Len(), 2)
			require.Equal(t, frame.Fields[4].Name, "params.var1 * params.var2 * 2")
			require.Equal(t, frame.Fields[4].Len(), 2)
			assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "")
		})
	})

	t.Run("With top_metrics", func(t *testing.T) {
		targets := map[string]string{
			"A": `{
				"timeField": "@timestamp",
				"metrics": [
					{
						"type": "top_metrics",
						"settings": {
							"order": "desc",
							"orderBy": "@timestamp",
							"metrics": ["@value", "@anotherValue"]
						},
						"id": "1"
					}
				],
				"bucketAggs": [{ "type": "date_histogram", "field": "@timestamp", "id": "3" }]
			}`,
		}
		response := `{
			"responses": [{
				"aggregations": {
					"3": {
						"buckets": [
							{
								"key": 1609459200000,
								"key_as_string": "2021-01-01T00:00:00.000Z",
								"1": {
									"top": [
										{ "sort": ["2021-01-01T00:00:00.000Z"], "metrics": { "@value": 1, "@anotherValue": 2 } }
									]
								}
							},
							{
								"key": 1609459210000,
								"key_as_string": "2021-01-01T00:00:10.000Z",
								"1": {
									"top": [
										{ "sort": ["2021-01-01T00:00:10.000Z"], "metrics": { "@value": 1, "@anotherValue": 2 } }
									]
								}
							}
						]
					}
				}
			}]
		}`
		rp, err := newResponseParserForTest(targets, response)
		assert.Nil(t, err)
		result, err := rp.getTimeSeries()
		assert.Nil(t, err)
		assert.Len(t, result.Responses, 1)

		queryRes := result.Responses["A"]
		assert.NotNil(t, queryRes)
		dataframes := queryRes.Frames
		assert.NoError(t, err)
		assert.Len(t, dataframes, 2)

		frame := dataframes[0]
		assert.Len(t, frame.Fields, 2)
		require.Equal(t, frame.Fields[0].Len(), 2)
		require.Equal(t, frame.Fields[1].Len(), 2)
		assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "Top Metrics @value")
		v, _ := frame.FloatAt(0, 0)
		assert.Equal(t, 1609459200000., v)
		v, _ = frame.FloatAt(1, 0)
		assert.Equal(t, 1., v)

		v, _ = frame.FloatAt(0, 1)
		assert.Equal(t, 1609459210000., v)
		v, _ = frame.FloatAt(1, 1)
		assert.Equal(t, 1., v)

		frame = dataframes[1]
		l, _ := frame.MarshalJSON()
		fmt.Println(string(l))
		assert.Len(t, frame.Fields, 2)
		require.Equal(t, frame.Fields[0].Len(), 2)
		require.Equal(t, frame.Fields[1].Len(), 2)
		assert.Equal(t, frame.Fields[1].Config.DisplayNameFromDS, "Top Metrics @anotherValue")
		v, _ = frame.FloatAt(0, 0)
		assert.Equal(t, 1609459200000., v)
		v, _ = frame.FloatAt(1, 0)
		assert.Equal(t, 2., v)

		v, _ = frame.FloatAt(0, 1)
		assert.Equal(t, 1609459210000., v)
		v, _ = frame.FloatAt(1, 1)
		assert.Equal(t, 2., v)
	})
}

func newResponseParserForTest(tsdbQueries map[string]string, responseBody string) (*responseParser, error) {
	from := time.Date(2018, 5, 15, 17, 50, 0, 0, time.UTC)
	to := time.Date(2018, 5, 15, 17, 55, 0, 0, time.UTC)
	timeRange := backend.TimeRange{
		From: from,
		To:   to,
	}
	tsdbQuery := backend.QueryDataRequest{
		Queries: []backend.DataQuery{},
	}

	for refID, tsdbQueryBody := range tsdbQueries {
		tsdbQuery.Queries = append(tsdbQuery.Queries, backend.DataQuery{
			TimeRange: timeRange,
			RefID:     refID,
			JSON:      json.RawMessage(tsdbQueryBody),
		})
	}

	var response es.MultiSearchResponse
	err := json.Unmarshal([]byte(responseBody), &response)
	if err != nil {
		return nil, err
	}

	tsQueryParser := newTimeSeriesQueryParser()
	queries, err := tsQueryParser.parse(tsdbQuery.Queries)
	if err != nil {
		return nil, err
	}

	return newResponseParser(response.Responses, queries, nil), nil
}