package api

import (
	"context"
	"dev.azure.com/schwarzit/schwarzit.stackit-public/audit-go.git/audit/utils"
	auditV1 "dev.azure.com/schwarzit/schwarzit.stackit-public/audit-go.git/gen/go/audit/v1"
	"fmt"
	"github.com/bufbuild/protovalidate-go"
	"github.com/google/uuid"
	"github.com/stretchr/testify/assert"
	"google.golang.org/protobuf/proto"
	"google.golang.org/protobuf/types/known/structpb"
	"google.golang.org/protobuf/types/known/wrapperspb"
	"testing"
	"time"
)

func Test_getObjectIdAndTypeFromAuditParams(t *testing.T) {

	t.Run(
		"object id empty", func(t *testing.T) {
			objectId, objectType, err := getObjectIdAndTypeFromAuditParams(&AuditParameters{})
			assert.EqualError(t, err, "object id missing")
			assert.Equal(t, "", objectId)
			assert.Nil(t, objectType)
		},
	)

	t.Run(
		"object type empty", func(t *testing.T) {
			objectId, objectType, err := getObjectIdAndTypeFromAuditParams(&AuditParameters{ObjectId: "value"})
			assert.EqualError(t, err, "object type missing")
			assert.Equal(t, "", objectId)
			assert.Nil(t, objectType)
		},
	)

	t.Run(
		"object id and invalid type set", func(t *testing.T) {
			objectId, objectType, err := getObjectIdAndTypeFromAuditParams(
				&AuditParameters{
					ObjectId:   "value",
					ObjectType: ObjectTypeFromPluralString("invalid"),
				},
			)
			assert.EqualError(t, err, "unknown object type")
			assert.Equal(t, "", objectId)
			assert.Nil(t, objectType)
		},
	)

	t.Run(
		"object id and type set", func(t *testing.T) {
			objectId, objectType, err := getObjectIdAndTypeFromAuditParams(
				&AuditParameters{
					ObjectId:   "value",
					ObjectType: ObjectTypeProject,
				},
			)
			assert.NoError(t, err)
			assert.Equal(t, "value", objectId)
			assert.Equal(t, ObjectTypeProject, *objectType)
		},
	)
}

func Test_AuditLogEntryBuilder(t *testing.T) {

	t.Run("nothing set", func(t *testing.T) {
		logEntry, err := NewAuditLogEntryBuilder().Build(context.Background(), SequenceNumber(1))
		assert.Error(t, err)
		assert.Equal(t, "object id missing", err.Error())
		assert.Nil(t, logEntry)
	})

	t.Run("details missing", func(t *testing.T) {
		logEntry, err := NewAuditLogEntryBuilder().WithRequiredLocation("eu01").
			WithRequiredObjectId("1").
			WithRequiredObjectType(ObjectTypeProject).
			Build(context.Background(), SequenceNumber(1))

		assert.NoError(t, err)
		assert.NotNil(t, logEntry)

		validator, err := protovalidate.New()
		assert.NoError(t, err)
		err = validator.Validate(logEntry)
		assert.Error(t, err)
		assert.Equal(t, "validation error:\n - proto_payload.service_name: value is required [required]\n - proto_payload.operation_name: value is required [required]\n - proto_payload.request_metadata.caller_supplied_user_agent: value is required [required]\n - proto_payload.request_metadata.request_attributes.method: value is required [required]\n - proto_payload.request_metadata.request_attributes.headers: value is required [required]\n - proto_payload.request_metadata.request_attributes.path: value is required [required]\n - proto_payload.request_metadata.request_attributes.host: value is required [required]\n - proto_payload.request_metadata.request_attributes.scheme: value is required [required]\n - proto_payload.request_metadata.request_attributes.protocol: value is required [required]\n - insert_id: value does not match regex pattern `^[0-9]+/[a-z0-9-]+/[a-z0-9-]+/[0-9]+$` [string.pattern]", err.Error())
	})

	t.Run("required only", func(t *testing.T) {
		builder := NewAuditLogEntryBuilder().
			WithRequiredLocation("eu01").
			WithRequiredObjectId("1").
			WithRequiredObjectType(ObjectTypeProject).
			WithRequiredOperation("stackit.demo-service.v1.operation").
			WithRequiredApiRequest(ApiRequest{
				Body:   nil,
				Header: TestHeaders,
				Host:   "localhost",
				Method: "POST",
				Scheme: "https",
				Proto:  "HTTP/1.1",
				URL: RequestUrl{
					Path:     "/",
					RawQuery: nil,
				},
			}).
			WithRequiredRequestClientIp("127.0.0.1").
			WithRequiredServiceName("demo-service").
			WithRequiredWorkerId("worker-id")

		logEntry, err := builder.Build(context.Background(), SequenceNumber(1))
		assert.NoError(t, err)
		assert.NotNil(t, logEntry)

		assert.Equal(t, "projects/1/logs/admin-activity", logEntry.LogName)
		assert.Nil(t, logEntry.Labels)
		assert.Equal(t, auditV1.LogSeverity_LOG_SEVERITY_DEFAULT, logEntry.Severity)
		assert.NotNil(t, logEntry.Timestamp)
		assert.Nil(t, logEntry.CorrelationId)
		assert.Regexp(t, "[0-9]+/eu01/worker-id/1", logEntry.InsertId)

		assert.NotNil(t, logEntry.ProtoPayload)

		authenticationInfo := logEntry.ProtoPayload.AuthenticationInfo
		assert.NotNil(t, authenticationInfo)
		assert.Equal(t, "Christian.Schaible@novatec-gmbh.de", authenticationInfo.PrincipalEmail)
		assert.Equal(t, "cd94f01a-df2e-4456-902e-48f5e57f0b63", authenticationInfo.PrincipalId)
		assert.Nil(t, authenticationInfo.ServiceAccountDelegationInfo)
		assert.Nil(t, authenticationInfo.ServiceAccountName)

		assert.Nil(t, logEntry.ProtoPayload.AuthorizationInfo)
		assert.Nil(t, logEntry.ProtoPayload.Metadata)
		assert.Equal(t, "stackit.demo-service.v1.operation", logEntry.ProtoPayload.OperationName)
		assert.Nil(t, logEntry.ProtoPayload.Request)

		requestMetadata := logEntry.ProtoPayload.RequestMetadata
		assert.NotNil(t, requestMetadata)
		assert.Equal(t, "127.0.0.1", requestMetadata.CallerIp)
		assert.Equal(t, "custom", requestMetadata.CallerSuppliedUserAgent)

		requestAttributes := requestMetadata.RequestAttributes
		assert.NotNil(t, requestAttributes)
		assert.Equal(t, "/", requestAttributes.Path)
		assert.NotNil(t, requestAttributes.Time)
		assert.Equal(t, "localhost", requestAttributes.Host)
		assert.Equal(t, auditV1.AttributeContext_HTTP_METHOD_POST, requestAttributes.Method)
		assert.Nil(t, requestAttributes.Id)
		assert.Equal(t, "https", requestAttributes.Scheme)
		assert.Equal(t, map[string]string{"user-agent": "custom"}, requestAttributes.Headers)
		assert.Nil(t, requestAttributes.Query)
		assert.Equal(t, "HTTP/1.1", requestAttributes.Protocol)

		requestAttributesAuth := requestAttributes.Auth
		assert.NotNil(t, requestAttributesAuth)
		assert.Equal(t, "cd94f01a-df2e-4456-902e-48f5e57f0b63/https%3A%2F%2Faccounts.dev.stackit.cloud", requestAttributesAuth.Principal)
		assert.Equal(t, []string{"stackit-portal-login-dev-client-id"}, requestAttributesAuth.Audiences)
		assert.NotNil(t, requestAttributesAuth.Claims)

		assert.Equal(t, "projects/1", logEntry.ProtoPayload.ResourceName)
		assert.Nil(t, logEntry.ProtoPayload.Response)

		responseMetadata := logEntry.ProtoPayload.ResponseMetadata
		assert.NotNil(t, responseMetadata)
		assert.Nil(t, responseMetadata.ErrorDetails)
		assert.Nil(t, responseMetadata.ErrorMessage)
		assert.Equal(t, wrapperspb.Int32(200), responseMetadata.StatusCode)

		responseAttributes := responseMetadata.ResponseAttributes
		assert.NotNil(t, responseAttributes)
		assert.Nil(t, responseAttributes.Headers)
		assert.Nil(t, responseAttributes.NumResponseItems)
		assert.Nil(t, responseAttributes.Size)
		assert.NotNil(t, responseAttributes.Time)

		assert.Equal(t, "demo-service", logEntry.ProtoPayload.ServiceName)

		validator, err := protovalidate.New()
		assert.NoError(t, err)
		err = validator.Validate(logEntry)
		assert.NoError(t, err)
	})

	t.Run("with details", func(t *testing.T) {
		details := map[string]interface{}{"key": "detail"}
		permission := "project.edit"
		permissionCheckResult := true
		requestTime := time.Now().AddDate(0, 0, -2).UTC()
		responseTime := time.Now().AddDate(0, 0, -1).UTC()
		responseBody := map[string]interface{}{"key": "response"}
		responseBodyBytes, err := ResponseBodyToBytes(responseBody)
		assert.NoError(t, err)
		builder := NewAuditLogEntryBuilder().
			WithRequiredLocation("eu01").
			WithRequiredObjectId("1").
			WithRequiredObjectType(ObjectTypeProject).
			WithRequiredOperation("stackit.demo-service.v1.operation").
			WithRequiredApiRequest(ApiRequest{
				Body:   nil,
				Header: TestHeaders,
				Host:   "localhost",
				Method: "POST",
				Scheme: "https",
				Proto:  "HTTP/1.1",
				URL: RequestUrl{
					Path:     "/",
					RawQuery: nil,
				},
			}).
			WithRequiredRequestClientIp("127.0.0.1").
			WithRequiredServiceName("demo-service").
			WithRequiredWorkerId("worker-id").
			WithAuditPermission(permission).
			WithAuditPermissionCheckResult(permissionCheckResult).
			WithDetails(details).
			WithEventType(EventTypePolicyDenied).
			WithLabels(map[string]string{"key": "label"}).
			WithNumResponseItems(int64(10)).
			WithRequestCorrelationId("correlationId").
			WithRequestId("requestId").
			WithRequestTime(requestTime).
			WithResponseBodyBytes(responseBodyBytes).
			WithResponseHeaders(map[string][]string{"key": {"header"}}).
			WithResponseTime(responseTime).
			WithSeverity(auditV1.LogSeverity_LOG_SEVERITY_ERROR).
			WithStatusCode(400)

		logEntry, err := builder.Build(context.Background(), SequenceNumber(1))
		assert.NoError(t, err)
		assert.NotNil(t, logEntry)

		assert.Equal(t, "projects/1/logs/policy-denied", logEntry.LogName)
		assert.Equal(t, map[string]string{"key": "label"}, logEntry.Labels)
		assert.Equal(t, auditV1.LogSeverity_LOG_SEVERITY_ERROR, logEntry.Severity)
		assert.NotNil(t, logEntry.Timestamp)
		assert.Equal(t, "correlationId", *logEntry.CorrelationId)
		assert.Regexp(t, "[0-9]+/eu01/worker-id/1", logEntry.InsertId)

		assert.NotNil(t, logEntry.ProtoPayload)

		authenticationInfo := logEntry.ProtoPayload.AuthenticationInfo
		assert.NotNil(t, authenticationInfo)
		assert.Equal(t, "Christian.Schaible@novatec-gmbh.de", authenticationInfo.PrincipalEmail)
		assert.Equal(t, "cd94f01a-df2e-4456-902e-48f5e57f0b63", authenticationInfo.PrincipalId)
		assert.Nil(t, authenticationInfo.ServiceAccountDelegationInfo)
		assert.Nil(t, authenticationInfo.ServiceAccountName)

		assert.Equal(t, []*auditV1.AuthorizationInfo{{
			Resource:   "projects/1",
			Permission: &permission,
			Granted:    &permissionCheckResult,
		}}, logEntry.ProtoPayload.AuthorizationInfo)

		expectedMetadata, _ := structpb.NewStruct(details)
		assert.Equal(t, expectedMetadata, logEntry.ProtoPayload.Metadata)
		assert.Equal(t, "stackit.demo-service.v1.operation", logEntry.ProtoPayload.OperationName)
		assert.Nil(t, logEntry.ProtoPayload.Request)

		requestMetadata := logEntry.ProtoPayload.RequestMetadata
		assert.NotNil(t, requestMetadata)
		assert.Equal(t, "127.0.0.1", requestMetadata.CallerIp)
		assert.Equal(t, "custom", requestMetadata.CallerSuppliedUserAgent)

		requestAttributes := requestMetadata.RequestAttributes
		assert.NotNil(t, requestAttributes)
		assert.Equal(t, "/", requestAttributes.Path)
		assert.NotNil(t, requestAttributes.Time)
		assert.Equal(t, "localhost", requestAttributes.Host)
		assert.Equal(t, auditV1.AttributeContext_HTTP_METHOD_POST, requestAttributes.Method)
		assert.Equal(t, "requestId", *requestAttributes.Id)
		assert.Equal(t, "https", requestAttributes.Scheme)
		assert.Equal(t, map[string]string{"user-agent": "custom"}, requestAttributes.Headers)
		assert.Nil(t, requestAttributes.Query)
		assert.Equal(t, "HTTP/1.1", requestAttributes.Protocol)

		requestAttributesAuth := requestAttributes.Auth
		assert.NotNil(t, requestAttributesAuth)
		assert.Equal(t, "cd94f01a-df2e-4456-902e-48f5e57f0b63/https%3A%2F%2Faccounts.dev.stackit.cloud", requestAttributesAuth.Principal)
		assert.Equal(t, []string{"stackit-portal-login-dev-client-id"}, requestAttributesAuth.Audiences)
		assert.NotNil(t, requestAttributesAuth.Claims)

		expectedResponse, _ := structpb.NewStruct(responseBody)
		assert.Equal(t, "projects/1", logEntry.ProtoPayload.ResourceName)
		assert.Equal(t, expectedResponse, logEntry.ProtoPayload.Response)

		responseMetadata := logEntry.ProtoPayload.ResponseMetadata
		assert.NotNil(t, responseMetadata)
		assert.Nil(t, responseMetadata.ErrorDetails)
		assert.Equal(t, "Client error", *responseMetadata.ErrorMessage)
		assert.Equal(t, wrapperspb.Int32(400), responseMetadata.StatusCode)

		responseAttributes := responseMetadata.ResponseAttributes
		assert.NotNil(t, responseAttributes)
		assert.Equal(t, map[string]string{"key": "header"}, responseAttributes.Headers)
		assert.Equal(t, wrapperspb.Int64(10), responseAttributes.NumResponseItems)
		assert.Equal(t, wrapperspb.Int64(18), responseAttributes.Size)
		assert.NotNil(t, responseAttributes.Time)

		assert.Equal(t, "demo-service", logEntry.ProtoPayload.ServiceName)

		validator, err := protovalidate.New()
		assert.NoError(t, err)
		err = validator.Validate(logEntry)
		assert.NoError(t, err)
	})

	t.Run("system event", func(t *testing.T) {
		builder := NewAuditLogEntryBuilder().
			WithRequiredLocation("eu01").
			WithRequiredObjectId("1").
			WithRequiredObjectType(ObjectTypeProject).
			WithRequiredOperation("stackit.demo-service.v1.operation").
			WithRequiredServiceName("demo-service").
			WithRequiredWorkerId("worker-id").
			AsSystemEvent()

		logEntry, err := builder.Build(context.Background(), SequenceNumber(1))
		assert.NoError(t, err)
		assert.NotNil(t, logEntry)

		assert.Equal(t, fmt.Sprintf("system/%s/logs/system-event", uuid.Nil.String()), logEntry.LogName)
		assert.Nil(t, logEntry.Labels)
		assert.Equal(t, auditV1.LogSeverity_LOG_SEVERITY_DEFAULT, logEntry.Severity)
		assert.NotNil(t, logEntry.Timestamp)
		assert.Nil(t, logEntry.CorrelationId)
		assert.Regexp(t, "[0-9]+/eu01/worker-id/1", logEntry.InsertId)

		assert.NotNil(t, logEntry.ProtoPayload)

		authenticationInfo := logEntry.ProtoPayload.AuthenticationInfo
		assert.NotNil(t, authenticationInfo)
		assert.Equal(t, EmailAddressDoNotReplyAtStackItDotCloud, authenticationInfo.PrincipalEmail)
		assert.Equal(t, "none", authenticationInfo.PrincipalId)
		assert.Nil(t, authenticationInfo.ServiceAccountDelegationInfo)
		assert.Nil(t, authenticationInfo.ServiceAccountName)

		assert.Nil(t, logEntry.ProtoPayload.AuthorizationInfo)
		assert.Nil(t, logEntry.ProtoPayload.Metadata)
		assert.Equal(t, "stackit.demo-service.v1.operation", logEntry.ProtoPayload.OperationName)
		assert.Nil(t, logEntry.ProtoPayload.Request)

		requestMetadata := logEntry.ProtoPayload.RequestMetadata
		assert.NotNil(t, requestMetadata)
		assert.Equal(t, "0.0.0.0", requestMetadata.CallerIp)
		assert.Equal(t, "none", requestMetadata.CallerSuppliedUserAgent)

		requestAttributes := requestMetadata.RequestAttributes
		assert.NotNil(t, requestAttributes)
		assert.Equal(t, "none", requestAttributes.Path)
		assert.NotNil(t, requestAttributes.Time)
		assert.Equal(t, "0.0.0.0", requestAttributes.Host)
		assert.Equal(t, auditV1.AttributeContext_HTTP_METHOD_OTHER, requestAttributes.Method)
		assert.Nil(t, requestAttributes.Id)
		assert.Equal(t, "none", requestAttributes.Scheme)
		assert.Equal(t, map[string]string{"user-agent": "none"}, requestAttributes.Headers)
		assert.Nil(t, requestAttributes.Query)
		assert.Equal(t, "none", requestAttributes.Protocol)

		requestAttributesAuth := requestAttributes.Auth
		assert.NotNil(t, requestAttributesAuth)
		assert.Equal(t, "none/none", requestAttributesAuth.Principal)
		assert.Equal(t, []string{}, requestAttributesAuth.Audiences)
		assert.NotNil(t, requestAttributesAuth.Claims)
		assert.Equal(t, map[string]any{}, requestAttributesAuth.Claims.AsMap())

		assert.Equal(t, "projects/1", logEntry.ProtoPayload.ResourceName)
		assert.Nil(t, logEntry.ProtoPayload.Response)

		responseMetadata := logEntry.ProtoPayload.ResponseMetadata
		assert.NotNil(t, responseMetadata)
		assert.Nil(t, responseMetadata.ErrorDetails)
		assert.Nil(t, responseMetadata.ErrorMessage)
		assert.Equal(t, wrapperspb.Int32(200), responseMetadata.StatusCode)

		responseAttributes := responseMetadata.ResponseAttributes
		assert.NotNil(t, responseAttributes)
		assert.Nil(t, responseAttributes.Headers)
		assert.Nil(t, responseAttributes.NumResponseItems)
		assert.Nil(t, responseAttributes.Size)
		assert.NotNil(t, responseAttributes.Time)

		assert.Equal(t, "demo-service", logEntry.ProtoPayload.ServiceName)

		validator, err := protovalidate.New()
		assert.NoError(t, err)
		err = validator.Validate(logEntry)
		assert.NoError(t, err)
	})

	t.Run("with response body unserialized", func(t *testing.T) {
		details := map[string]interface{}{"key": "detail"}
		permission := "project.edit"
		permissionCheckResult := true
		requestTime := time.Now().AddDate(0, 0, -2).UTC()
		responseTime := time.Now().AddDate(0, 0, -1).UTC()
		responseBody := map[string]interface{}{"key": "response"}
		builder := NewAuditLogEntryBuilder().
			WithRequiredLocation("eu01").
			WithRequiredObjectId("1").
			WithRequiredObjectType(ObjectTypeProject).
			WithRequiredOperation("stackit.demo-service.v1.operation").
			WithRequiredApiRequest(ApiRequest{
				Body:   nil,
				Header: TestHeaders,
				Host:   "localhost",
				Method: "POST",
				Scheme: "https",
				Proto:  "HTTP/1.1",
				URL: RequestUrl{
					Path:     "/",
					RawQuery: nil,
				},
			}).
			WithRequiredRequestClientIp("127.0.0.1").
			WithRequiredServiceName("demo-service").
			WithRequiredWorkerId("worker-id").
			WithAuditPermission(permission).
			WithAuditPermissionCheckResult(permissionCheckResult).
			WithDetails(details).
			WithEventType(EventTypeSystemEvent).
			WithLabels(map[string]string{"key": "label"}).
			WithNumResponseItems(int64(10)).
			WithRequestCorrelationId("correlationId").
			WithRequestId("requestId").
			WithRequestTime(requestTime).
			WithResponseBody(responseBody).
			WithResponseHeaders(map[string][]string{"key": {"header"}}).
			WithResponseTime(responseTime).
			WithSeverity(auditV1.LogSeverity_LOG_SEVERITY_ERROR).
			WithStatusCode(400)

		logEntry, err := builder.Build(context.Background(), SequenceNumber(1))
		assert.NoError(t, err)
		assert.NotNil(t, logEntry)
		assert.NotNil(t, logEntry.ProtoPayload)

		expectedResponse, _ := structpb.NewStruct(responseBody)
		assert.Equal(t, "projects/1", logEntry.ProtoPayload.ResourceName)
		assert.Equal(t, expectedResponse, logEntry.ProtoPayload.Response)

		validator, err := protovalidate.New()
		assert.NoError(t, err)
		err = validator.Validate(logEntry)
		assert.NoError(t, err)
	})

	t.Run("with response body and response body bytes set", func(t *testing.T) {
		responseBody := map[string]interface{}{"key": "response"}
		responseBodyBytes, err := ResponseBodyToBytes(responseBody)
		assert.NoError(t, err)
		builder := NewAuditLogEntryBuilder().
			WithRequiredApiRequest(ApiRequest{
				Body:   nil,
				Header: TestHeaders,
				Host:   "localhost",
				Method: "POST",
				Scheme: "https",
				Proto:  "HTTP/1.1",
				URL: RequestUrl{
					Path:     "/",
					RawQuery: nil,
				},
			}).
			WithRequiredLocation("eu01").
			WithRequiredObjectId("1").
			WithRequiredObjectType(ObjectTypeProject).
			WithRequiredOperation("stackit.demo-service.v1.operation").
			WithRequiredRequestClientIp("127.0.0.1").
			WithRequiredServiceName("demo-service").
			WithRequiredWorkerId("worker-id").
			WithResponseBody(responseBody).
			WithResponseBodyBytes(responseBodyBytes)

		logEntry, err := builder.Build(context.Background(), SequenceNumber(1))
		assert.EqualError(t, err, "responseBodyBytes and responseBody set")
		assert.Nil(t, logEntry)
	})

	t.Run("with invalid response body", func(t *testing.T) {
		builder := NewAuditLogEntryBuilder().
			WithRequiredApiRequest(ApiRequest{
				Body:   nil,
				Header: TestHeaders,
				Host:   "localhost",
				Method: "POST",
				Scheme: "https",
				Proto:  "HTTP/1.1",
				URL: RequestUrl{
					Path:     "/",
					RawQuery: nil,
				},
			}).
			WithRequiredLocation("eu01").
			WithRequiredObjectId("1").
			WithRequiredObjectType(ObjectTypeProject).
			WithRequiredOperation("stackit.demo-service.v1.operation").
			WithRequiredRequestClientIp("127.0.0.1").
			WithRequiredServiceName("demo-service").
			WithRequiredWorkerId("worker-id").
			WithResponseBody("invalid")

		logEntry, err := builder.Build(context.Background(), SequenceNumber(1))
		assert.EqualError(t, err, "json: cannot unmarshal string into Go value of type map[string]interface {}\ninvalid response")
		assert.Nil(t, logEntry)
	})
}

func Test_AuditEventBuilder(t *testing.T) {

	t.Run("nothing set", func(t *testing.T) {
		api, _ := NewMockAuditApi()
		sequenceNumberGenerator := utils.NewDefaultSequenceNumberGenerator()

		cloudEvent, routingIdentifier, err := NewAuditEventBuilder(api, sequenceNumberGenerator, "demo-service", "worker-id", "eu01").
			Build(context.Background(), SequenceNumber(1))

		assert.Error(t, err)
		assert.Equal(t, "object id missing", err.Error())
		assert.Nil(t, cloudEvent)
		assert.Nil(t, routingIdentifier)
	})

	t.Run("details missing", func(t *testing.T) {
		api, _ := NewMockAuditApi()
		sequenceNumberGenerator := utils.NewDefaultSequenceNumberGenerator()

		cloudEvent, routingIdentifier, err := NewAuditEventBuilder(api, sequenceNumberGenerator, "demo-service", "worker-id", "eu01").
			WithRequiredObjectId("objectId").
			WithRequiredObjectType(ObjectTypeProject).
			Build(context.Background(), SequenceNumber(1))

		assert.Error(t, err)
		assert.Equal(t, "validation error:\n - log_name: value does not match regex pattern `^[a-z-]+/[a-z0-9-]+/logs/(?:admin-activity|system-event|policy-denied|data-access)$` [string.pattern]\n - proto_payload.operation_name: value is required [required]\n - proto_payload.resource_name: value does not match regex pattern `^[a-z]+/[a-z0-9-]+(?:/[a-z0-9-]+/[a-z0-9-_]+)*$` [string.pattern]\n - proto_payload.request_metadata.caller_supplied_user_agent: value is required [required]\n - proto_payload.request_metadata.request_attributes.method: value is required [required]\n - proto_payload.request_metadata.request_attributes.headers: value is required [required]\n - proto_payload.request_metadata.request_attributes.path: value is required [required]\n - proto_payload.request_metadata.request_attributes.host: value is required [required]\n - proto_payload.request_metadata.request_attributes.scheme: value is required [required]\n - proto_payload.request_metadata.request_attributes.protocol: value is required [required]", err.Error())
		assert.Nil(t, cloudEvent)
		assert.Nil(t, routingIdentifier)
	})

	t.Run("required only", func(t *testing.T) {
		api, _ := NewMockAuditApi()
		sequenceNumberGenerator := utils.NewDefaultSequenceNumberGenerator()

		objectId := uuid.NewString()
		operation := "stackit.demo-service.v1.operation"
		builder := NewAuditEventBuilder(api, sequenceNumberGenerator, "demo-service", "worker-id", "eu01").
			WithRequiredObjectId(objectId).
			WithRequiredObjectType(ObjectTypeProject).
			WithRequiredOperation(operation).
			WithRequiredApiRequest(ApiRequest{
				Body:   nil,
				Header: TestHeaders,
				Host:   "localhost",
				Method: "POST",
				Scheme: "https",
				Proto:  "HTTP/1.1",
				URL: RequestUrl{
					Path:     "/",
					RawQuery: nil,
				},
			}).
			WithRequiredRequestClientIp("127.0.0.1")

		routableIdentifier := RoutableIdentifier{Identifier: objectId, Type: ObjectTypeProject}

		cloudEvent, routingIdentifier, err := builder.Build(context.Background(), SequenceNumber(1))
		assert.NoError(t, err)
		assert.True(t, builder.IsBuilt())

		assert.Equal(t, &routableIdentifier, routingIdentifier)

		assert.NotNil(t, cloudEvent)
		assert.Equal(t, "application/cloudevents+protobuf", cloudEvent.DataContentType)
		assert.Equal(t, "audit.v1.RoutableAuditEvent", cloudEvent.DataType)
		assert.Regexp(t, "[0-9]+/eu01/worker-id/1", cloudEvent.Id)
		assert.Equal(t, "demo-service", cloudEvent.Source)
		assert.Equal(t, "1.0", cloudEvent.SpecVersion)
		assert.Equal(t, fmt.Sprintf("projects/%s", objectId), cloudEvent.Subject)
		assert.NotNil(t, cloudEvent.Time)
		assert.Equal(t, "", *cloudEvent.TraceParent)
		assert.Equal(t, "", *cloudEvent.TraceState)

		var routableAuditEvent auditV1.RoutableAuditEvent
		assert.NotNil(t, cloudEvent.Data)
		assert.NoError(t, proto.Unmarshal(cloudEvent.Data, &routableAuditEvent))

		assert.Equal(t, routableIdentifier.ToObjectIdentifier().Identifier, routableAuditEvent.ObjectIdentifier.Identifier)
		assert.Equal(t, routableIdentifier.ToObjectIdentifier().Type, routableAuditEvent.ObjectIdentifier.Type)
		assert.Equal(t, auditV1.Visibility_VISIBILITY_PUBLIC, routableAuditEvent.Visibility)
		assert.Equal(t, operation, routableAuditEvent.OperationName)

		var logEntry auditV1.AuditLogEntry
		assert.NotNil(t, routableAuditEvent.GetUnencryptedData().Data)
		assert.NoError(t, proto.Unmarshal(routableAuditEvent.GetUnencryptedData().Data, &logEntry))

		assert.Equal(t, fmt.Sprintf("projects/%s/logs/admin-activity", objectId), logEntry.LogName)
		assert.Nil(t, logEntry.Labels)
		assert.Equal(t, auditV1.LogSeverity_LOG_SEVERITY_DEFAULT, logEntry.Severity)
		assert.NotNil(t, logEntry.Timestamp)
		assert.Nil(t, logEntry.CorrelationId)
		assert.Regexp(t, "[0-9]+/eu01/worker-id/1", logEntry.InsertId)

		assert.NotNil(t, logEntry.ProtoPayload)

		authenticationInfo := logEntry.ProtoPayload.AuthenticationInfo
		assert.NotNil(t, authenticationInfo)
		assert.Equal(t, "Christian.Schaible@novatec-gmbh.de", authenticationInfo.PrincipalEmail)
		assert.Equal(t, "cd94f01a-df2e-4456-902e-48f5e57f0b63", authenticationInfo.PrincipalId)
		assert.Nil(t, authenticationInfo.ServiceAccountDelegationInfo)
		assert.Nil(t, authenticationInfo.ServiceAccountName)

		assert.Nil(t, logEntry.ProtoPayload.AuthorizationInfo)
		assert.Nil(t, logEntry.ProtoPayload.Metadata)
		assert.Equal(t, operation, logEntry.ProtoPayload.OperationName)
		assert.Nil(t, logEntry.ProtoPayload.Request)

		requestMetadata := logEntry.ProtoPayload.RequestMetadata
		assert.NotNil(t, requestMetadata)
		assert.Equal(t, "127.0.0.1", requestMetadata.CallerIp)
		assert.Equal(t, "custom", requestMetadata.CallerSuppliedUserAgent)

		requestAttributes := requestMetadata.RequestAttributes
		assert.NotNil(t, requestAttributes)
		assert.Equal(t, "/", requestAttributes.Path)
		assert.NotNil(t, requestAttributes.Time)
		assert.Equal(t, "localhost", requestAttributes.Host)
		assert.Equal(t, auditV1.AttributeContext_HTTP_METHOD_POST, requestAttributes.Method)
		assert.Nil(t, requestAttributes.Id)
		assert.Equal(t, "https", requestAttributes.Scheme)
		assert.Equal(t, map[string]string{"user-agent": "custom"}, requestAttributes.Headers)
		assert.Nil(t, requestAttributes.Query)
		assert.Equal(t, "HTTP/1.1", requestAttributes.Protocol)

		requestAttributesAuth := requestAttributes.Auth
		assert.NotNil(t, requestAttributesAuth)
		assert.Equal(t, "cd94f01a-df2e-4456-902e-48f5e57f0b63/https%3A%2F%2Faccounts.dev.stackit.cloud", requestAttributesAuth.Principal)
		assert.Equal(t, []string{"stackit-portal-login-dev-client-id"}, requestAttributesAuth.Audiences)
		assert.NotNil(t, requestAttributesAuth.Claims)

		assert.Equal(t, fmt.Sprintf("projects/%s", objectId), logEntry.ProtoPayload.ResourceName)
		assert.Nil(t, logEntry.ProtoPayload.Response)

		responseMetadata := logEntry.ProtoPayload.ResponseMetadata
		assert.NotNil(t, responseMetadata)
		assert.Nil(t, responseMetadata.ErrorDetails)
		assert.Nil(t, responseMetadata.ErrorMessage)
		assert.Equal(t, wrapperspb.Int32(200), responseMetadata.StatusCode)

		responseAttributes := responseMetadata.ResponseAttributes
		assert.NotNil(t, responseAttributes)
		assert.Nil(t, responseAttributes.Headers)
		assert.Nil(t, responseAttributes.NumResponseItems)
		assert.Nil(t, responseAttributes.Size)
		assert.NotNil(t, responseAttributes.Time)

		assert.Equal(t, "demo-service", logEntry.ProtoPayload.ServiceName)

		validator, err := protovalidate.New()
		assert.NoError(t, err)
		err = validator.Validate(&logEntry)
		assert.NoError(t, err)
	})

	t.Run("with details", func(t *testing.T) {
		api, _ := NewMockAuditApi()
		sequenceNumberGenerator := utils.NewDefaultSequenceNumberGenerator()

		objectId := uuid.NewString()
		operation := "stackit.demo-service.v1.operation"
		details := map[string]interface{}{"key": "detail"}
		permission := "project.edit"
		permissionCheckResult := true
		requestTime := time.Now().AddDate(0, 0, -2).UTC()
		responseTime := time.Now().AddDate(0, 0, -1).UTC()
		responseBody := map[string]interface{}{"key": "response"}
		responseBodyBytes, err := ResponseBodyToBytes(responseBody)
		assert.NoError(t, err)
		builder := NewAuditEventBuilder(api, sequenceNumberGenerator, "demo-service", "worker-id", "eu01").
			WithRequiredObjectId(objectId).
			WithRequiredObjectType(ObjectTypeProject).
			WithRequiredOperation(operation).
			WithRequiredApiRequest(ApiRequest{
				Body:   nil,
				Header: TestHeaders,
				Host:   "localhost",
				Method: "POST",
				Scheme: "https",
				Proto:  "HTTP/1.1",
				URL: RequestUrl{
					Path:     "/",
					RawQuery: nil,
				},
			}).
			WithRequiredRequestClientIp("127.0.0.1").
			WithAuditPermission(permission).
			WithAuditPermissionCheckResult(permissionCheckResult).
			WithDetails(details).
			WithEventType(EventTypeAdminActivity).
			WithLabels(map[string]string{"key": "label"}).
			WithNumResponseItems(int64(10)).
			WithRequestCorrelationId("correlationId").
			WithRequestId("requestId").
			WithRequestTime(requestTime).
			WithResponseBodyBytes(responseBodyBytes).
			WithResponseHeaders(map[string][]string{"key": {"header"}}).
			WithResponseTime(responseTime).
			WithSeverity(auditV1.LogSeverity_LOG_SEVERITY_ERROR).
			WithStatusCode(400).
			WithVisibility(auditV1.Visibility_VISIBILITY_PRIVATE)

		routableIdentifier := RoutableIdentifier{Identifier: objectId, Type: ObjectTypeProject}

		cloudEvent, routingIdentifier, err := builder.Build(context.Background(), SequenceNumber(1))
		assert.NoError(t, err)
		assert.True(t, builder.IsBuilt())

		assert.Equal(t, &routableIdentifier, routingIdentifier)

		assert.NotNil(t, cloudEvent)
		assert.Equal(t, "application/cloudevents+protobuf", cloudEvent.DataContentType)
		assert.Equal(t, "audit.v1.RoutableAuditEvent", cloudEvent.DataType)
		assert.Regexp(t, "[0-9]+/eu01/worker-id/1", cloudEvent.Id)
		assert.Equal(t, "demo-service", cloudEvent.Source)
		assert.Equal(t, "1.0", cloudEvent.SpecVersion)
		assert.Equal(t, fmt.Sprintf("projects/%s", objectId), cloudEvent.Subject)
		assert.NotNil(t, cloudEvent.Time)
		assert.Equal(t, "", *cloudEvent.TraceParent)
		assert.Equal(t, "", *cloudEvent.TraceState)

		var routableAuditEvent auditV1.RoutableAuditEvent
		assert.NotNil(t, cloudEvent.Data)
		assert.NoError(t, proto.Unmarshal(cloudEvent.Data, &routableAuditEvent))

		assert.Equal(t, routableIdentifier.ToObjectIdentifier().Identifier, routableAuditEvent.ObjectIdentifier.Identifier)
		assert.Equal(t, routableIdentifier.ToObjectIdentifier().Type, routableAuditEvent.ObjectIdentifier.Type)
		assert.Equal(t, auditV1.Visibility_VISIBILITY_PRIVATE, routableAuditEvent.Visibility)
		assert.Equal(t, operation, routableAuditEvent.OperationName)

		var logEntry auditV1.AuditLogEntry
		assert.NotNil(t, routableAuditEvent.GetUnencryptedData().Data)
		assert.NoError(t, proto.Unmarshal(routableAuditEvent.GetUnencryptedData().Data, &logEntry))

		assert.Equal(t, fmt.Sprintf("projects/%s/logs/admin-activity", objectId), logEntry.LogName)
		assert.Equal(t, map[string]string{"key": "label"}, logEntry.Labels)
		assert.Equal(t, auditV1.LogSeverity_LOG_SEVERITY_ERROR, logEntry.Severity)
		assert.NotNil(t, logEntry.Timestamp)
		assert.Equal(t, "correlationId", *logEntry.CorrelationId)
		assert.Regexp(t, "[0-9]+/eu01/worker-id/1", logEntry.InsertId)

		assert.NotNil(t, logEntry.ProtoPayload)

		authenticationInfo := logEntry.ProtoPayload.AuthenticationInfo
		assert.NotNil(t, authenticationInfo)
		assert.Equal(t, "Christian.Schaible@novatec-gmbh.de", authenticationInfo.PrincipalEmail)
		assert.Equal(t, "cd94f01a-df2e-4456-902e-48f5e57f0b63", authenticationInfo.PrincipalId)
		assert.Nil(t, authenticationInfo.ServiceAccountDelegationInfo)
		assert.Nil(t, authenticationInfo.ServiceAccountName)

		assert.Equal(t, []*auditV1.AuthorizationInfo{{
			Resource:   fmt.Sprintf("projects/%s", objectId),
			Permission: &permission,
			Granted:    &permissionCheckResult,
		}}, logEntry.ProtoPayload.AuthorizationInfo)

		expectedMetadata, _ := structpb.NewStruct(details)
		assert.Equal(t, expectedMetadata, logEntry.ProtoPayload.Metadata)
		assert.Equal(t, "stackit.demo-service.v1.operation", logEntry.ProtoPayload.OperationName)
		assert.Nil(t, logEntry.ProtoPayload.Request)

		requestMetadata := logEntry.ProtoPayload.RequestMetadata
		assert.NotNil(t, requestMetadata)
		assert.Equal(t, "127.0.0.1", requestMetadata.CallerIp)
		assert.Equal(t, "custom", requestMetadata.CallerSuppliedUserAgent)

		requestAttributes := requestMetadata.RequestAttributes
		assert.NotNil(t, requestAttributes)
		assert.Equal(t, "/", requestAttributes.Path)
		assert.NotNil(t, requestAttributes.Time)
		assert.Equal(t, "localhost", requestAttributes.Host)
		assert.Equal(t, auditV1.AttributeContext_HTTP_METHOD_POST, requestAttributes.Method)
		assert.Equal(t, "requestId", *requestAttributes.Id)
		assert.Equal(t, "https", requestAttributes.Scheme)
		assert.Equal(t, map[string]string{"user-agent": "custom"}, requestAttributes.Headers)
		assert.Nil(t, requestAttributes.Query)
		assert.Equal(t, "HTTP/1.1", requestAttributes.Protocol)

		requestAttributesAuth := requestAttributes.Auth
		assert.NotNil(t, requestAttributesAuth)
		assert.Equal(t, "cd94f01a-df2e-4456-902e-48f5e57f0b63/https%3A%2F%2Faccounts.dev.stackit.cloud", requestAttributesAuth.Principal)
		assert.Equal(t, []string{"stackit-portal-login-dev-client-id"}, requestAttributesAuth.Audiences)
		assert.NotNil(t, requestAttributesAuth.Claims)

		expectedResponse, _ := structpb.NewStruct(responseBody)
		assert.Equal(t, fmt.Sprintf("projects/%s", objectId), logEntry.ProtoPayload.ResourceName)
		assert.Equal(t, expectedResponse, logEntry.ProtoPayload.Response)

		responseMetadata := logEntry.ProtoPayload.ResponseMetadata
		assert.NotNil(t, responseMetadata)
		assert.Nil(t, responseMetadata.ErrorDetails)
		assert.Equal(t, "Client error", *responseMetadata.ErrorMessage)
		assert.Equal(t, wrapperspb.Int32(400), responseMetadata.StatusCode)

		responseAttributes := responseMetadata.ResponseAttributes
		assert.NotNil(t, responseAttributes)
		assert.Equal(t, map[string]string{"key": "header"}, responseAttributes.Headers)
		assert.Equal(t, wrapperspb.Int64(10), responseAttributes.NumResponseItems)
		assert.Equal(t, wrapperspb.Int64(18), responseAttributes.Size)
		assert.NotNil(t, responseAttributes.Time)

		assert.Equal(t, "demo-service", logEntry.ProtoPayload.ServiceName)

		validator, err := protovalidate.New()
		assert.NoError(t, err)
		err = validator.Validate(&logEntry)
		assert.NoError(t, err)
	})

	t.Run("system event with object reference", func(t *testing.T) {
		api, _ := NewMockAuditApi()
		sequenceNumberGenerator := utils.NewDefaultSequenceNumberGenerator()

		objectId := uuid.NewString()
		operation := "stackit.demo-service.v1.operation"
		builder := NewAuditEventBuilder(api, sequenceNumberGenerator, "demo-service", "worker-id", "eu01").
			WithRequiredObjectId(objectId).
			WithRequiredObjectType(ObjectTypeProject).
			WithRequiredOperation(operation).
			AsSystemEvent()

		cloudEvent, routingIdentifier, err := builder.Build(context.Background(), SequenceNumber(1))
		assert.NoError(t, err)
		assert.True(t, builder.IsBuilt())

		assert.Equal(t, SystemIdentifier.Identifier, routingIdentifier.ToObjectIdentifier().Identifier)
		assert.Equal(t, SystemIdentifier.Type, routingIdentifier.ToObjectIdentifier().Type)

		assert.NotNil(t, cloudEvent)
		assert.Equal(t, "application/cloudevents+protobuf", cloudEvent.DataContentType)
		assert.Equal(t, "audit.v1.RoutableAuditEvent", cloudEvent.DataType)
		assert.Regexp(t, "[0-9]+/eu01/worker-id/1", cloudEvent.Id)
		assert.Equal(t, "demo-service", cloudEvent.Source)
		assert.Equal(t, "1.0", cloudEvent.SpecVersion)
		assert.Equal(t, fmt.Sprintf("projects/%s", objectId), cloudEvent.Subject)
		assert.NotNil(t, cloudEvent.Time)
		assert.Equal(t, "", *cloudEvent.TraceParent)
		assert.Equal(t, "", *cloudEvent.TraceState)

		var routableAuditEvent auditV1.RoutableAuditEvent
		assert.NotNil(t, cloudEvent.Data)
		assert.NoError(t, proto.Unmarshal(cloudEvent.Data, &routableAuditEvent))

		assert.Equal(t, SystemIdentifier.Identifier, routableAuditEvent.ObjectIdentifier.Identifier)
		assert.Equal(t, SystemIdentifier.Type, routableAuditEvent.ObjectIdentifier.Type)
		assert.Equal(t, auditV1.Visibility_VISIBILITY_PRIVATE, routableAuditEvent.Visibility)
		assert.Equal(t, operation, routableAuditEvent.OperationName)

		var logEntry auditV1.AuditLogEntry
		assert.NotNil(t, routableAuditEvent.GetUnencryptedData().Data)
		assert.NoError(t, proto.Unmarshal(routableAuditEvent.GetUnencryptedData().Data, &logEntry))

		assert.Equal(t, fmt.Sprintf("system/%s/logs/system-event", uuid.Nil.String()), logEntry.LogName)
		assert.Nil(t, logEntry.Labels)
		assert.Equal(t, auditV1.LogSeverity_LOG_SEVERITY_DEFAULT, logEntry.Severity)
		assert.NotNil(t, logEntry.Timestamp)
		assert.Nil(t, logEntry.CorrelationId)
		assert.Regexp(t, "[0-9]+/eu01/worker-id/1", logEntry.InsertId)

		assert.NotNil(t, logEntry.ProtoPayload)

		authenticationInfo := logEntry.ProtoPayload.AuthenticationInfo
		assert.NotNil(t, authenticationInfo)
		assert.Equal(t, EmailAddressDoNotReplyAtStackItDotCloud, authenticationInfo.PrincipalEmail)
		assert.Equal(t, "none", authenticationInfo.PrincipalId)
		assert.Nil(t, authenticationInfo.ServiceAccountDelegationInfo)
		assert.Nil(t, authenticationInfo.ServiceAccountName)

		assert.Nil(t, logEntry.ProtoPayload.AuthorizationInfo)
		assert.Nil(t, logEntry.ProtoPayload.Metadata)
		assert.Equal(t, operation, logEntry.ProtoPayload.OperationName)
		assert.Nil(t, logEntry.ProtoPayload.Request)

		requestMetadata := logEntry.ProtoPayload.RequestMetadata
		assert.NotNil(t, requestMetadata)
		assert.Equal(t, "0.0.0.0", requestMetadata.CallerIp)
		assert.Equal(t, "none", requestMetadata.CallerSuppliedUserAgent)

		requestAttributes := requestMetadata.RequestAttributes
		assert.NotNil(t, requestAttributes)
		assert.Equal(t, "none", requestAttributes.Path)
		assert.NotNil(t, requestAttributes.Time)
		assert.Equal(t, "0.0.0.0", requestAttributes.Host)
		assert.Equal(t, auditV1.AttributeContext_HTTP_METHOD_OTHER, requestAttributes.Method)
		assert.Nil(t, requestAttributes.Id)
		assert.Equal(t, "none", requestAttributes.Scheme)
		assert.Equal(t, map[string]string{"user-agent": "none"}, requestAttributes.Headers)
		assert.Nil(t, requestAttributes.Query)
		assert.Equal(t, "none", requestAttributes.Protocol)

		requestAttributesAuth := requestAttributes.Auth
		assert.NotNil(t, requestAttributesAuth)
		assert.Equal(t, "none/none", requestAttributesAuth.Principal)
		assert.Nil(t, requestAttributesAuth.Audiences)
		assert.NotNil(t, requestAttributesAuth.Claims)
		assert.Equal(t, map[string]any{}, requestAttributesAuth.Claims.AsMap())

		assert.Equal(t, fmt.Sprintf("projects/%s", objectId), logEntry.ProtoPayload.ResourceName)
		assert.Nil(t, logEntry.ProtoPayload.Response)

		responseMetadata := logEntry.ProtoPayload.ResponseMetadata
		assert.NotNil(t, responseMetadata)
		assert.Nil(t, responseMetadata.ErrorDetails)
		assert.Nil(t, responseMetadata.ErrorMessage)
		assert.Equal(t, wrapperspb.Int32(200), responseMetadata.StatusCode)

		responseAttributes := responseMetadata.ResponseAttributes
		assert.NotNil(t, responseAttributes)
		assert.Nil(t, responseAttributes.Headers)
		assert.Nil(t, responseAttributes.NumResponseItems)
		assert.Nil(t, responseAttributes.Size)
		assert.NotNil(t, responseAttributes.Time)

		assert.Equal(t, "demo-service", logEntry.ProtoPayload.ServiceName)

		validator, err := protovalidate.New()
		assert.NoError(t, err)
		err = validator.Validate(&logEntry)
		assert.NoError(t, err)
	})

	t.Run("system event", func(t *testing.T) {
		api, _ := NewMockAuditApi()
		sequenceNumberGenerator := utils.NewDefaultSequenceNumberGenerator()

		operation := "stackit.demo-service.v1.operation"
		builder := NewAuditEventBuilder(api, sequenceNumberGenerator, "demo-service", "worker-id", "eu01").
			WithRequiredOperation(operation).
			AsSystemEvent()

		cloudEvent, routingIdentifier, err := builder.Build(context.Background(), SequenceNumber(1))
		assert.NoError(t, err)
		assert.True(t, builder.IsBuilt())

		assert.Equal(t, SystemIdentifier.Identifier, routingIdentifier.ToObjectIdentifier().Identifier)
		assert.Equal(t, SystemIdentifier.Type, routingIdentifier.ToObjectIdentifier().Type)

		assert.NotNil(t, cloudEvent)
		assert.Equal(t, "application/cloudevents+protobuf", cloudEvent.DataContentType)
		assert.Equal(t, "audit.v1.RoutableAuditEvent", cloudEvent.DataType)
		assert.Regexp(t, "[0-9]+/eu01/worker-id/1", cloudEvent.Id)
		assert.Equal(t, "demo-service", cloudEvent.Source)
		assert.Equal(t, "1.0", cloudEvent.SpecVersion)
		assert.Equal(t, fmt.Sprintf("system/%s", uuid.Nil.String()), cloudEvent.Subject)
		assert.NotNil(t, cloudEvent.Time)
		assert.Equal(t, "", *cloudEvent.TraceParent)
		assert.Equal(t, "", *cloudEvent.TraceState)

		var routableAuditEvent auditV1.RoutableAuditEvent
		assert.NotNil(t, cloudEvent.Data)
		assert.NoError(t, proto.Unmarshal(cloudEvent.Data, &routableAuditEvent))

		assert.Equal(t, SystemIdentifier.Identifier, routableAuditEvent.ObjectIdentifier.Identifier)
		assert.Equal(t, SystemIdentifier.Type, routableAuditEvent.ObjectIdentifier.Type)
		assert.Equal(t, auditV1.Visibility_VISIBILITY_PRIVATE, routableAuditEvent.Visibility)
		assert.Equal(t, operation, routableAuditEvent.OperationName)

		var logEntry auditV1.AuditLogEntry
		assert.NotNil(t, routableAuditEvent.GetUnencryptedData().Data)
		assert.NoError(t, proto.Unmarshal(routableAuditEvent.GetUnencryptedData().Data, &logEntry))

		assert.Equal(t, fmt.Sprintf("system/%s/logs/system-event", uuid.Nil.String()), logEntry.LogName)
		assert.Nil(t, logEntry.Labels)
		assert.Equal(t, auditV1.LogSeverity_LOG_SEVERITY_DEFAULT, logEntry.Severity)
		assert.NotNil(t, logEntry.Timestamp)
		assert.Nil(t, logEntry.CorrelationId)
		assert.Regexp(t, "[0-9]+/eu01/worker-id/1", logEntry.InsertId)

		assert.NotNil(t, logEntry.ProtoPayload)

		authenticationInfo := logEntry.ProtoPayload.AuthenticationInfo
		assert.NotNil(t, authenticationInfo)
		assert.Equal(t, EmailAddressDoNotReplyAtStackItDotCloud, authenticationInfo.PrincipalEmail)
		assert.Equal(t, "none", authenticationInfo.PrincipalId)
		assert.Nil(t, authenticationInfo.ServiceAccountDelegationInfo)
		assert.Nil(t, authenticationInfo.ServiceAccountName)

		assert.Nil(t, logEntry.ProtoPayload.AuthorizationInfo)
		assert.Nil(t, logEntry.ProtoPayload.Metadata)
		assert.Equal(t, operation, logEntry.ProtoPayload.OperationName)
		assert.Nil(t, logEntry.ProtoPayload.Request)

		requestMetadata := logEntry.ProtoPayload.RequestMetadata
		assert.NotNil(t, requestMetadata)
		assert.Equal(t, "0.0.0.0", requestMetadata.CallerIp)
		assert.Equal(t, "none", requestMetadata.CallerSuppliedUserAgent)

		requestAttributes := requestMetadata.RequestAttributes
		assert.NotNil(t, requestAttributes)
		assert.Equal(t, "none", requestAttributes.Path)
		assert.NotNil(t, requestAttributes.Time)
		assert.Equal(t, "0.0.0.0", requestAttributes.Host)
		assert.Equal(t, auditV1.AttributeContext_HTTP_METHOD_OTHER, requestAttributes.Method)
		assert.Nil(t, requestAttributes.Id)
		assert.Equal(t, "none", requestAttributes.Scheme)
		assert.Equal(t, map[string]string{"user-agent": "none"}, requestAttributes.Headers)
		assert.Nil(t, requestAttributes.Query)
		assert.Equal(t, "none", requestAttributes.Protocol)

		requestAttributesAuth := requestAttributes.Auth
		assert.NotNil(t, requestAttributesAuth)
		assert.Equal(t, "none/none", requestAttributesAuth.Principal)
		assert.Nil(t, requestAttributesAuth.Audiences)
		assert.NotNil(t, requestAttributesAuth.Claims)
		assert.Equal(t, map[string]any{}, requestAttributesAuth.Claims.AsMap())

		assert.Equal(t, fmt.Sprintf("system/%s", uuid.Nil.String()), logEntry.ProtoPayload.ResourceName)
		assert.Nil(t, logEntry.ProtoPayload.Response)

		responseMetadata := logEntry.ProtoPayload.ResponseMetadata
		assert.NotNil(t, responseMetadata)
		assert.Nil(t, responseMetadata.ErrorDetails)
		assert.Nil(t, responseMetadata.ErrorMessage)
		assert.Equal(t, wrapperspb.Int32(200), responseMetadata.StatusCode)

		responseAttributes := responseMetadata.ResponseAttributes
		assert.NotNil(t, responseAttributes)
		assert.Nil(t, responseAttributes.Headers)
		assert.Nil(t, responseAttributes.NumResponseItems)
		assert.Nil(t, responseAttributes.Size)
		assert.NotNil(t, responseAttributes.Time)

		assert.Equal(t, "demo-service", logEntry.ProtoPayload.ServiceName)

		validator, err := protovalidate.New()
		assert.NoError(t, err)
		err = validator.Validate(&logEntry)
		assert.NoError(t, err)
	})

	t.Run("with response body unserialized", func(t *testing.T) {
		api, _ := NewMockAuditApi()
		sequenceNumberGenerator := utils.NewDefaultSequenceNumberGenerator()

		objectId := uuid.NewString()
		operation := "stackit.demo-service.v1.operation"
		details := map[string]interface{}{"key": "detail"}
		permission := "project.edit"
		permissionCheckResult := true
		requestTime := time.Now().AddDate(0, 0, -2).UTC()
		responseTime := time.Now().AddDate(0, 0, -1).UTC()
		responseBody := map[string]interface{}{"key": "response"}
		builder := NewAuditEventBuilder(api, sequenceNumberGenerator, "demo-service", "worker-id", "eu01").
			WithRequiredObjectId(objectId).
			WithRequiredObjectType(ObjectTypeProject).
			WithRequiredOperation(operation).
			WithRequiredApiRequest(ApiRequest{
				Body:   nil,
				Header: TestHeaders,
				Host:   "localhost",
				Method: "POST",
				Scheme: "https",
				Proto:  "HTTP/1.1",
				URL: RequestUrl{
					Path:     "/",
					RawQuery: nil,
				},
			}).
			WithRequiredRequestClientIp("127.0.0.1").
			WithAuditPermission(permission).
			WithAuditPermissionCheckResult(permissionCheckResult).
			WithDetails(details).
			WithEventType(EventTypeAdminActivity).
			WithLabels(map[string]string{"key": "label"}).
			WithNumResponseItems(int64(10)).
			WithRequestCorrelationId("correlationId").
			WithRequestId("requestId").
			WithRequestTime(requestTime).
			WithResponseBody(responseBody).
			WithResponseHeaders(map[string][]string{"key": {"header"}}).
			WithResponseTime(responseTime).
			WithSeverity(auditV1.LogSeverity_LOG_SEVERITY_ERROR).
			WithStatusCode(400).
			WithVisibility(auditV1.Visibility_VISIBILITY_PRIVATE)

		routableIdentifier := RoutableIdentifier{Identifier: objectId, Type: ObjectTypeProject}

		cloudEvent, routingIdentifier, err := builder.Build(context.Background(), SequenceNumber(1))
		assert.NoError(t, err)
		assert.True(t, builder.IsBuilt())

		assert.Equal(t, &routableIdentifier, routingIdentifier)
		assert.NotNil(t, cloudEvent)

		var routableAuditEvent auditV1.RoutableAuditEvent
		assert.NotNil(t, cloudEvent.Data)
		assert.NoError(t, proto.Unmarshal(cloudEvent.Data, &routableAuditEvent))

		var logEntry auditV1.AuditLogEntry
		assert.NotNil(t, routableAuditEvent.GetUnencryptedData().Data)
		assert.NoError(t, proto.Unmarshal(routableAuditEvent.GetUnencryptedData().Data, &logEntry))
		assert.NotNil(t, logEntry.ProtoPayload)

		expectedResponse, _ := structpb.NewStruct(responseBody)
		assert.Equal(t, fmt.Sprintf("projects/%s", objectId), logEntry.ProtoPayload.ResourceName)
		assert.Equal(t, expectedResponse, logEntry.ProtoPayload.Response)

		validator, err := protovalidate.New()
		assert.NoError(t, err)
		err = validator.Validate(&logEntry)
		assert.NoError(t, err)
	})

	t.Run("no entry builder", func(t *testing.T) {
		api, _ := NewMockAuditApi()
		sequenceNumberGenerator := utils.NewDefaultSequenceNumberGenerator()

		cloudEvent, routingIdentifier, err := NewAuditEventBuilder(api, sequenceNumberGenerator, "demo-service", "worker-id", "eu01").
			WithAuditLogEntryBuilder(nil).Build(context.Background(), SequenceNumber(1))

		assert.EqualError(t, err, "audit log entry builder not set")
		assert.Nil(t, cloudEvent)
		assert.Nil(t, routingIdentifier)
	})

	t.Run("next sequence number", func(t *testing.T) {
		api, _ := NewMockAuditApi()
		sequenceNumberGenerator := utils.NewDefaultSequenceNumberGenerator()

		builder := NewAuditEventBuilder(api, sequenceNumberGenerator, "demo-service", "worker-id", "eu01")
		assert.Equal(t, SequenceNumber(0), builder.NextSequenceNumber())
		assert.Equal(t, SequenceNumber(1), builder.NextSequenceNumber())
	})

	t.Run("revert sequence number", func(t *testing.T) {
		api, _ := NewMockAuditApi()
		sequenceNumberGenerator := utils.NewDefaultSequenceNumberGenerator()

		builder := NewAuditEventBuilder(api, sequenceNumberGenerator, "demo-service", "worker-id", "eu01")
		assert.Equal(t, SequenceNumber(0), builder.NextSequenceNumber())
		assert.Equal(t, SequenceNumber(1), builder.NextSequenceNumber())
		assert.Equal(t, SequenceNumber(2), builder.NextSequenceNumber())
		builder.RevertSequenceNumber(SequenceNumber(1))
		assert.Equal(t, SequenceNumber(1), builder.NextSequenceNumber())
		assert.Equal(t, SequenceNumber(3), builder.NextSequenceNumber())
	})
}