package metric

import (
	"reflect"
	"testing"
	"time"

	"github.com/opencost/opencost/core/pkg/storage"
	"github.com/opencost/opencost/core/pkg/util/timeutil"
	"github.com/opencost/opencost/modules/collector-source/pkg/metric/aggregator"
	"github.com/opencost/opencost/modules/collector-source/pkg/util"
)

const TestActiveMinutesID = "TestActiveMinutes"
const TestAverageID = "TestAverage"
const TestMetric = "test_metric"

func testMetricCollector() MetricStore {
	memStore := NewInMemoryMetricStore()

	memStore.Register(NewMetricCollector(
		TestActiveMinutesID,
		TestMetric,
		[]string{
			"test",
		},
		aggregator.ActiveMinutes,
		nil,
	))

	memStore.Register(NewMetricCollector(
		TestAverageID,
		TestMetric,
		[]string{
			"test",
		},
		aggregator.AverageOverTime,
		nil,
	))

	return memStore
}

func TestNewMetricRepository_DisasterRecovery(t *testing.T) {
	time3 := time.Now().UTC().Truncate(timeutil.Day)
	time2 := time3.Add(-12 * time.Hour)
	time1 := time3.Add(-timeutil.Day)
	store := storage.NewMemoryStorage()
	repo := NewMetricRepository(
		"test",
		[]util.ResolutionConfiguration{
			{
				Interval:  "1d",
				Retention: 3,
			},
		},
		store,
		testMetricCollector,
	)
	inputUpdateSet1 := UpdateSet{
		Updates: []Update{
			{
				Name: TestMetric,
				Labels: map[string]string{
					"test": "test",
				},
				Value:          1,
				AdditionalInfo: nil,
			},
		},
	}

	inputUpdateSet2 := UpdateSet{
		Updates: []Update{
			{
				Name: TestMetric,
				Labels: map[string]string{
					"test": "test",
				},
				Value:          2,
				AdditionalInfo: nil,
			},
		},
	}

	inputUpdateSet3 := UpdateSet{
		Updates: []Update{
			{
				Name: TestMetric,
				Labels: map[string]string{
					"test": "test",
				},
				Value:          3,
				AdditionalInfo: nil,
			},
		},
	}

	repo.Update(inputUpdateSet1.Updates, time1)
	repo.Update(inputUpdateSet2.Updates, time2)
	repo.Update(inputUpdateSet3.Updates, time3)

	repo2 := NewMetricRepository(
		"test",
		[]util.ResolutionConfiguration{
			{
				Interval:  "1d",
				Retention: 3,
			},
		},
		store,
		testMetricCollector,
	)

	collector1, err := repo.GetCollector("1d", time3)
	if err != nil {
		t.Fatalf("failed to get collector from repo1: %s", err.Error())
	}
	activeMinutesRes1, err := collector1.Query(TestActiveMinutesID)
	if err != nil {
		t.Fatalf("failed to query %s from repo1: %s", TestActiveMinutesID, err.Error())
	}
	averageRes1, err := collector1.Query(TestAverageID)
	if err != nil {
		t.Fatalf("failed to query %s from repo1: %s", TestAverageID, err.Error())
	}

	collector2, err := repo2.GetCollector("1d", time3)
	if err != nil {
		t.Fatalf("failed to get collector from repo2: %s", err.Error())
	}
	activeMinutesRes2, err := collector2.Query(TestActiveMinutesID)
	if err != nil {
		t.Fatalf("failed to query %s from repo2: %s", TestActiveMinutesID, err.Error())
	}
	averageRes2, err := collector2.Query(TestAverageID)
	if err != nil {
		t.Fatalf("failed to query %s from repo2: %s", TestAverageID, err.Error())
	}

	if !reflect.DeepEqual(activeMinutesRes1, activeMinutesRes2) {
		t.Errorf("active minute query results did not match 1: %v, 2: %v", activeMinutesRes1, activeMinutesRes2)
	}
	if !reflect.DeepEqual(averageRes1, averageRes2) {
		t.Errorf("average query results did not match 1: %v, 2: %v", averageRes1, averageRes2)
	}
}