package historian

import (
	"context"
	"testing"
	"time"

	"github.com/grafana/grafana/pkg/components/simplejson"
	"github.com/grafana/grafana/pkg/infra/log"
	"github.com/grafana/grafana/pkg/services/annotations"
	"github.com/grafana/grafana/pkg/services/annotations/annotationstest"
	"github.com/grafana/grafana/pkg/services/dashboards"
	"github.com/grafana/grafana/pkg/services/ngalert/models"
	"github.com/grafana/grafana/pkg/services/ngalert/tests/fakes"
	"github.com/stretchr/testify/require"
)

func TestAnnotationHistorian_Integration(t *testing.T) {
	t.Run("alert annotations are queryable", func(t *testing.T) {
		anns := createTestAnnotationBackendSut(t)
		items := []annotations.Item{createAnnotation()}
		require.NoError(t, anns.recordAnnotationsSync(context.Background(), nil, items, log.NewNopLogger()))

		q := models.HistoryQuery{
			RuleUID: "my-rule",
			OrgID:   1,
		}
		frame, err := anns.QueryStates(context.Background(), q)

		require.NoError(t, err)
		require.NotNil(t, frame)
		require.Len(t, frame.Fields, 5)
		for i := 0; i < 5; i++ {
			require.Equal(t, frame.Fields[i].Len(), 1)
		}
	})
}

func createTestAnnotationBackendSut(t *testing.T) *AnnotationBackend {
	t.Helper()
	fakeAnnoRepo := annotationstest.NewFakeAnnotationsRepo()
	rules := fakes.NewRuleStore(t)
	rules.Rules[1] = []*models.AlertRule{
		models.AlertRuleGen(withOrgID(1), withUID("my-rule"))(),
	}
	return NewAnnotationBackend(fakeAnnoRepo, &dashboards.FakeDashboardService{}, rules)
}

func createAnnotation() annotations.Item {
	return annotations.Item{
		Id:      1,
		OrgId:   1,
		AlertId: 1,
		Text:    "MyAlert {a=b} - No data",
		Data:    simplejson.New(),
		Epoch:   time.Now().UnixNano() / int64(time.Millisecond),
	}
}

func withOrgID(orgId int64) func(rule *models.AlertRule) {
	return func(rule *models.AlertRule) {
		rule.OrgID = orgId
	}
}

func withUID(uid string) func(rule *models.AlertRule) {
	return func(rule *models.AlertRule) {
		rule.UID = uid
	}
}