package cloudwatch

import (
	"testing"

	"github.com/stretchr/testify/assert"
)

func TestCloudWatchQuery(t *testing.T) {
	t.Run("SEARCH(someexpression) was specified in the query editor", func(t *testing.T) {
		query := &cloudWatchQuery{
			RefId:      "A",
			Region:     "us-east-1",
			Expression: "SEARCH(someexpression)",
			Stats:      "Average",
			Period:     300,
			Id:         "id1",
		}

		assert.True(t, query.isSearchExpression(), "Expected a search expression")
		assert.False(t, query.isMathExpression(), "Expected not math expression")
	})

	t.Run("No expression, no multi dimension key values and no * was used", func(t *testing.T) {
		query := &cloudWatchQuery{
			RefId:      "A",
			Region:     "us-east-1",
			Expression: "",
			Stats:      "Average",
			Period:     300,
			Id:         "id1",
			MatchExact: true,
			Dimensions: map[string][]string{
				"InstanceId": {"i-12345678"},
			},
		}

		assert.False(t, query.isSearchExpression(), "Expected not a search expression")
		assert.False(t, query.isMathExpression(), "Expected not math expressions")
	})

	t.Run("No expression but multi dimension key values exist", func(t *testing.T) {
		query := &cloudWatchQuery{
			RefId:      "A",
			Region:     "us-east-1",
			Expression: "",
			Stats:      "Average",
			Period:     300,
			Id:         "id1",
			Dimensions: map[string][]string{
				"InstanceId": {"i-12345678", "i-34562312"},
			},
		}

		assert.True(t, query.isSearchExpression(), "Expected a search expression")
		assert.False(t, query.isMathExpression(), "Expected not math expressions")
	})

	t.Run("No expression but dimension values has *", func(t *testing.T) {
		query := &cloudWatchQuery{
			RefId:      "A",
			Region:     "us-east-1",
			Expression: "",
			Stats:      "Average",
			Period:     300,
			Id:         "id1",
			Dimensions: map[string][]string{
				"InstanceId":   {"i-12345678", "*"},
				"InstanceType": {"abc", "def"},
			},
		}

		assert.True(t, query.isSearchExpression(), "Expected a search expression")
		assert.False(t, query.isMathExpression(), "Expected not math expression")
	})

	t.Run("Query has a multi-valued dimension", func(t *testing.T) {
		query := &cloudWatchQuery{
			RefId:      "A",
			Region:     "us-east-1",
			Expression: "",
			Stats:      "Average",
			Period:     300,
			Id:         "id1",
			Dimensions: map[string][]string{
				"InstanceId":   {"i-12345678", "i-12345679"},
				"InstanceType": {"abc"},
			},
		}

		assert.True(t, query.isSearchExpression(), "Expected a search expression")
		assert.True(t, query.isMultiValuedDimensionExpression(), "Expected a multi-valued dimension expression")
	})

	t.Run("No dimensions were added", func(t *testing.T) {
		query := &cloudWatchQuery{
			RefId:      "A",
			Region:     "us-east-1",
			Expression: "",
			Stats:      "Average",
			Period:     300,
			Id:         "id1",
			MatchExact: false,
			Dimensions: make(map[string][]string),
		}
		t.Run("Match exact is false", func(t *testing.T) {
			query.MatchExact = false
			assert.True(t, query.isSearchExpression(), "Expected a search expression")
			assert.False(t, query.isMathExpression(), "Expected not math expression")
			assert.False(t, query.isMetricStat(), "Expected not metric stat")
		})

		t.Run("Match exact is true", func(t *testing.T) {
			query.MatchExact = true
			assert.False(t, query.isSearchExpression(), "Exxpected not search expression")
			assert.False(t, query.isMathExpression(), "Expected not math expression")
			assert.True(t, query.isMetricStat(), "Expected a metric stat")
		})
	})

	t.Run("Match exact is", func(t *testing.T) {
		query := &cloudWatchQuery{
			RefId:      "A",
			Region:     "us-east-1",
			Expression: "",
			Stats:      "Average",
			Period:     300,
			Id:         "id1",
			MatchExact: false,
			Dimensions: map[string][]string{
				"InstanceId": {"i-12345678"},
			},
		}

		assert.True(t, query.isSearchExpression(), "Expected search expression")
		assert.False(t, query.isMathExpression(), "Expected not math expression")
		assert.False(t, query.isMetricStat(), "Expected not metric stat")
	})
}

func (q *cloudWatchQuery) isMetricStat() bool {
	return !q.isSearchExpression() && !q.isMathExpression()
}