CloudWatch: Add support for AWS Metric Insights (#42487) (#42506)

* add support for code editor and builder

* refactor cloudwatch migration

* Add tooltip to editor field (#56)

* add tooltip

* add old tooltips

* Bug bash feedback fixes (#58)

* make ASC the default option

* update sql preview whenever sql changes

* don't allow queries without aggregation

* set default value for aggregation

* use new input field

* cleanup

* pr feedback

* prevent unnecessary rerenders

* use frame error instead of main error

* remove not used snapshot

* Use dimension filter in schema picker  (#63)

* use dimension key filter in group by and schema labels

* add dimension filter also to code editor

* add tests

* fix build error

* fix strict error

* remove debug code

* fix annotation editor (#64)

* fix annotation editor

* fix broken test

* revert annotation backend change

* PR feedback (#67)

* pr feedback

* removed dimension filter from group by

* add spacing between common fields and rest

* do not generate deep link for metric queries (#70)

* update docs (#69)

Co-authored-by: Erik Sundell <erik.sundell87@gmail.com>

* fix lint problem caused by merge conflict

Co-authored-by: achatterjee-grafana <70489351+achatterjee-grafana@users.noreply.github.com>
(cherry picked from commit bab78a9e64)

Co-authored-by: Erik Sundell <erik.sundell@grafana.com>

pkg/tsdb/cloudwatch/request_parser_test.go

@@ -272,4 +272,54 @@ func TestRequestParser(t *testing.T) {
 			assert.Equal(t, 21600, res.Period)
 		})
 	})
+
+	t.Run("Metric query type, metric editor mode and query api mode", func(t *testing.T) {
+		timeRange := legacydata.NewDataTimeRange("now-1h", "now-2h")
+		from, err := timeRange.ParseFrom()
+		require.NoError(t, err)
+		to, err := timeRange.ParseTo()
+		require.NoError(t, err)
+
+		t.Run("when metric query type and metric editor mode is not specified", func(t *testing.T) {
+			t.Run("it should be metric search builder", func(t *testing.T) {
+				query := getBaseJsonQuery()
+				res, err := parseRequestQuery(query, "ref1", from, to)
+				require.NoError(t, err)
+				assert.Equal(t, MetricQueryTypeSearch, res.MetricQueryType)
+				assert.Equal(t, MetricEditorModeBuilder, res.MetricEditorMode)
+				assert.Equal(t, GMDApiModeMetricStat, res.getGMDAPIMode())
+			})
+
+			t.Run("and an expression is specified it should be metric search builder", func(t *testing.T) {
+				query := getBaseJsonQuery()
+				query.Set("expression", "SUM(a)")
+				res, err := parseRequestQuery(query, "ref1", from, to)
+				require.NoError(t, err)
+				assert.Equal(t, MetricQueryTypeSearch, res.MetricQueryType)
+				assert.Equal(t, MetricEditorModeRaw, res.MetricEditorMode)
+				assert.Equal(t, GMDApiModeMathExpression, res.getGMDAPIMode())
+			})
+		})
+
+		t.Run("and an expression is specified it should be metric search builder", func(t *testing.T) {
+			query := getBaseJsonQuery()
+			query.Set("expression", "SUM(a)")
+			res, err := parseRequestQuery(query, "ref1", from, to)
+			require.NoError(t, err)
+			assert.Equal(t, MetricQueryTypeSearch, res.MetricQueryType)
+			assert.Equal(t, MetricEditorModeRaw, res.MetricEditorMode)
+			assert.Equal(t, GMDApiModeMathExpression, res.getGMDAPIMode())
+		})
+	})
+}
+
+func getBaseJsonQuery() *simplejson.Json {
+	return simplejson.NewFromAny(map[string]interface{}{
+		"refId":      "ref1",
+		"region":     "us-east-1",
+		"namespace":  "ec2",
+		"metricName": "CPUUtilization",
+		"statistic":  "Average",
+		"period":     "900",
+	})
 }