package env

import (
	"time"

	"github.com/opencost/opencost/core/pkg/env"
	"github.com/opencost/opencost/core/pkg/log"
	"github.com/opencost/opencost/core/pkg/util/timeutil"
)

const (
	APIPortEnvVar          = "API_PORT"
	NetworkCostsPortEnvVar = "NETWORK_COSTS_PORT"

	AWSAccessKeyIDEnvVar     = "AWS_ACCESS_KEY_ID"
	AWSAccessKeySecretEnvVar = "AWS_SECRET_ACCESS_KEY"
	AWSClusterIDEnvVar       = "AWS_CLUSTER_ID"
	AWSPricingURL            = "AWS_PRICING_URL"

	AlibabaAccessKeyIDEnvVar     = "ALIBABA_ACCESS_KEY_ID"
	AlibabaAccessKeySecretEnvVar = "ALIBABA_SECRET_ACCESS_KEY"

	AzureOfferIDEnvVar                   = "AZURE_OFFER_ID"
	AzureBillingAccountEnvVar            = "AZURE_BILLING_ACCOUNT"
	AzureDownloadBillingDataToDiskEnvVar = "AZURE_DOWNLOAD_BILLING_DATA_TO_DISK"

	ReleaseNameEnvVar                = "RELEASE_NAME"
	PodNameEnvVar                    = "POD_NAME"
	ClusterIDEnvVar                  = "CLUSTER_ID"
	ClusterProfileEnvVar             = "CLUSTER_PROFILE"
	RemoteEnabledEnvVar              = "REMOTE_WRITE_ENABLED"
	RemotePWEnvVar                   = "REMOTE_WRITE_PASSWORD"
	SQLAddressEnvVar                 = "SQL_ADDRESS"
	UseCSVProviderEnvVar             = "USE_CSV_PROVIDER"
	UseCustomProviderEnvVar          = "USE_CUSTOM_PROVIDER"
	CSVRegionEnvVar                  = "CSV_REGION"
	CSVEndpointEnvVar                = "CSV_ENDPOINT"
	CSVPathEnvVar                    = "CSV_PATH"
	ConfigPathEnvVar                 = "CONFIG_PATH"
	CloudProviderAPIKeyEnvVar        = "CLOUD_PROVIDER_API_KEY"
	CollectorDataSourceEnabledEnvVar = "COLLECTOR_DATA_SOURCE_ENABLED"
	PVMountPath                      = "PV_MOUNT_PATH"

	EmitPodAnnotationsMetricEnvVar       = "EMIT_POD_ANNOTATIONS_METRIC"
	EmitNamespaceAnnotationsMetricEnvVar = "EMIT_NAMESPACE_ANNOTATIONS_METRIC"
	EmitDeprecatedMetrics                = "EMIT_DEPRECATED_METRICS"

	EmitKsmV1MetricsEnvVar = "EMIT_KSM_V1_METRICS"
	EmitKsmV1MetricsOnly   = "EMIT_KSM_V1_METRICS_ONLY"

	PProfEnabledEnvVar = "PPROF_ENABLED"

	LogCollectionEnabledEnvVar    = "LOG_COLLECTION_ENABLED"
	ProductAnalyticsEnabledEnvVar = "PRODUCT_ANALYTICS_ENABLED"
	ErrorReportingEnabledEnvVar   = "ERROR_REPORTING_ENABLED"
	ValuesReportingEnabledEnvVar  = "VALUES_REPORTING_ENABLED"

	KubeRbacProxyEnabled = "KUBE_RBAC_PROXY_ENABLED"

	KubeConfigPathEnvVar = "KUBECONFIG_PATH"

	UTCOffsetEnvVar = "UTC_OFFSET"

	ETLEnabledEnvVar     = "ETL_ENABLED"
	ETLResolutionSeconds = "ETL_RESOLUTION_SECONDS"

	PricingConfigmapName = "PRICING_CONFIGMAP_NAME"
	MetricsConfigmapName = "METRICS_CONFIGMAP_NAME"

	ClusterInfoFileEnabledEnvVar  = "CLUSTER_INFO_FILE_ENABLED"
	ClusterCacheFileEnabledEnvVar = "CLUSTER_CACHE_FILE_ENABLED"

	IngestPodUIDEnvVar = "INGEST_POD_UID"

	ETLReadOnlyMode = "ETL_READ_ONLY"

	AllocationNodeLabelsEnabled = "ALLOCATION_NODE_LABELS_ENABLED"

	AssetIncludeLocalDiskCostEnvVar = "ASSET_INCLUDE_LOCAL_DISK_COST"

	regionOverrideList = "REGION_OVERRIDE_LIST"

	ExportCSVFile       = "EXPORT_CSV_FILE"
	ExportCSVLabelsList = "EXPORT_CSV_LABELS_LIST"
	ExportCSVLabelsAll  = "EXPORT_CSV_LABELS_ALL"
	ExportCSVMaxDays    = "EXPORT_CSV_MAX_DAYS"

	ExportBucketConfigFileEnvVar = "EXPORT_BUCKET_CONFIG_FILE"

	DataRetentionDailyResolutionDaysEnvVar   = "DATA_RETENTION_DAILY_RESOLUTION_DAYS"
	DataRetentionHourlyResolutionHoursEnvVar = "DATA_RETENTION_HOURLY_RESOLUTION_HOURS"

	// We assume that Kubernetes is enabled if there is a KUBERNETES_PORT environment variable present
	KubernetesEnabledEnvVar         = "KUBERNETES_PORT"
	CloudCostEnabledEnvVar          = "CLOUD_COST_ENABLED"
	CloudCostConfigPath             = "CLOUD_COST_CONFIG_PATH"
	CloudCostMonthToDateIntervalVar = "CLOUD_COST_MONTH_TO_DATE_INTERVAL"
	CloudCostRefreshRateHoursEnvVar = "CLOUD_COST_REFRESH_RATE_HOURS"
	CloudCostQueryWindowDaysEnvVar  = "CLOUD_COST_QUERY_WINDOW_DAYS"
	CloudCostRunWindowDaysEnvVar    = "CLOUD_COST_RUN_WINDOW_DAYS"

	CustomCostEnabledEnvVar          = "CUSTOM_COST_ENABLED"
	CustomCostQueryWindowDaysEnvVar  = "CUSTOM_COST_QUERY_WINDOW_DAYS"
	CustomCostRefreshRateHoursEnvVar = "CUSTOM_COST_REFRESH_RATE_HOURS"

	PluginConfigDirEnvVar     = "PLUGIN_CONFIG_DIR"
	PluginExecutableDirEnvVar = "PLUGIN_EXECUTABLE_DIR"

	OCIPricingURL = "OCI_PRICING_URL"

	CarbonEstimatesEnabledEnvVar = "CARBON_ESTIMATES_ENABLED"

	UseCacheV1 = "USE_CACHE_V1"

	InstallNamespaceEnvVar = "INSTALL_NAMESPACE"
	ConfigBucketEnvVar     = "CONFIG_BUCKET"

	// Node Stats Client Configuration
	NodeStatsForceKubeProxyEnvVar = "NODESTATS_FORCE_KUBE_PROXY"
	NodeStatsLocalProxyEnvVar     = "NODESTATS_LOCAL_PROXY"
	NodeStatsInsecureEnvVar       = "NODESTATS_INSECURE"
	NodeStatsCertFileEnvVar       = "NODESTATS_CERT_FILE"
	NodeStatsKeyFileEnvVar        = "NODESTATS_KEY_FILE"

	// Deprecated
	KubecostNamespaceEnvVar    = "KUBECOST_NAMESPACE"
	KubecostConfigBucketEnvVar = "KUBECOST_CONFIG_BUCKET"
)

const DefaultConfigMountPath = "/var/configs"

func IsETLReadOnlyMode() bool {
	return env.GetBool(ETLReadOnlyMode, false)
}

func GetExportCSVFile() string {
	return env.Get(ExportCSVFile, "")
}

func GetExportCSVLabelsAll() bool {
	return env.GetBool(ExportCSVLabelsAll, false)
}

func GetExportCSVLabelsList() []string {
	return env.GetList(ExportCSVLabelsList, ",")
}

func IsPProfEnabled() bool {
	return env.GetBool(PProfEnabledEnvVar, false)
}

func GetExportCSVMaxDays() int {
	return env.GetInt(ExportCSVMaxDays, 90)
}

// GetAPIPort returns the environment variable value for APIPortEnvVar which
// is the port number the API is available on.
func GetAPIPort() int {
	return env.GetInt(APIPortEnvVar, 9003)
}

// GetConfigBucketFile returns a file location for a mounted bucket configuration which is used to store
// a subset of configurations that require sharing via remote storage.
func GetConfigBucketFile() string {
	return env.Get(ConfigBucketEnvVar, env.Get(KubecostConfigBucketEnvVar, ""))
}

// IsClusterInfoFileEnabled returns true if the cluster info is read from a file or pulled from the local
// cloud provider and kubernetes.
func IsClusterInfoFileEnabled() bool {
	return env.GetBool(ClusterInfoFileEnabledEnvVar, false)
}

// IsClusterCacheFileEnabled returns true if the kubernetes cluster data is read from a file or pulled from the local
// kubernetes API.
func IsClusterCacheFileEnabled() bool {
	return env.GetBool(ClusterCacheFileEnabledEnvVar, false)
}

func GetPricingConfigmapName() string {
	return env.Get(PricingConfigmapName, "pricing-configs")
}

func GetMetricsConfigmapName() string {
	return env.Get(MetricsConfigmapName, "metrics-config")
}

// IsEmitNamespaceAnnotationsMetric returns true if cost-model is configured to emit the kube_namespace_annotations metric
// containing the namespace annotations
func IsEmitNamespaceAnnotationsMetric() bool {
	return env.GetBool(EmitNamespaceAnnotationsMetricEnvVar, false)
}

// IsEmitPodAnnotationsMetric returns true if cost-model is configured to emit the kube_pod_annotations metric containing
// pod annotations.
func IsEmitPodAnnotationsMetric() bool {
	return env.GetBool(EmitPodAnnotationsMetricEnvVar, false)
}

// IsEmitKsmV1Metrics returns true if cost-model is configured to emit all necessary KSM v1
// metrics that were removed in KSM v2
func IsEmitKsmV1Metrics() bool {
	return env.GetBool(EmitKsmV1MetricsEnvVar, true)
}

func IsEmitKsmV1MetricsOnly() bool {
	return env.GetBool(EmitKsmV1MetricsOnly, false)
}

func IsEmitDeprecatedMetrics() bool {
	return env.GetBool(EmitDeprecatedMetrics, false)
}

// GetAWSAccessKeyID returns the environment variable value for AWSAccessKeyIDEnvVar which represents
// the AWS access key for authentication
func GetAWSAccessKeyID() string {
	awsAccessKeyID := env.Get(AWSAccessKeyIDEnvVar, "")
	// If the sample nil service key name is set, zero it out so that it is not
	// misinterpreted as a real service key.
	if awsAccessKeyID == "AKIXXX" {
		awsAccessKeyID = ""
	}
	return awsAccessKeyID
}

// GetAWSAccessKeySecret returns the environment variable value for AWSAccessKeySecretEnvVar which represents
// the AWS access key secret for authentication
func GetAWSAccessKeySecret() string {
	return env.Get(AWSAccessKeySecretEnvVar, "")
}

// GetAWSClusterID returns the environment variable value for AWSClusterIDEnvVar which represents
// an AWS specific cluster identifier.
func GetAWSClusterID() string {
	return env.Get(AWSClusterIDEnvVar, "")
}

// GetAWSPricingURL returns an optional alternative URL to fetch AWS pricing data from; for use in airgapped environments
func GetAWSPricingURL() string {
	return env.Get(AWSPricingURL, "")
}

// GetAlibabaAccessKeyID returns the environment variable value for AlibabaAccessKeyIDEnvVar which represents
// the Alibaba access key for authentication
func GetAlibabaAccessKeyID() string {
	return env.Get(AlibabaAccessKeyIDEnvVar, "")
}

// GetAlibabaAccessKeySecret returns the environment variable value for AlibabaAccessKeySecretEnvVar which represents
// the Alibaba access key secret for authentication
func GetAlibabaAccessKeySecret() string {
	return env.Get(AlibabaAccessKeySecretEnvVar, "")
}

// GetAzureOfferID returns the environment variable value for AzureOfferIDEnvVar which represents
// the Azure offer ID for determining prices.
func GetAzureOfferID() string {
	return env.Get(AzureOfferIDEnvVar, "")
}

// GetAzureBillingAccount returns the environment variable value for
// AzureBillingAccountEnvVar which represents the Azure billing
// account for determining prices. If this is specified
// customer-specific prices will be downloaded from the consumption
// price sheet API.
func GetAzureBillingAccount() string {
	return env.Get(AzureBillingAccountEnvVar, "")
}

// IsAzureDownloadBillingDataToDisk returns the environment variable value for
// AzureDownloadBillingDataToDiskEnvVar which indicates whether the Azure
// Billing Data should be held in memory or written to disk.
func IsAzureDownloadBillingDataToDisk() bool {
	return env.GetBool(AzureDownloadBillingDataToDiskEnvVar, true)
}

// GetInstallNamespace returns the environment variable value that is set for the kubernetes namespace
// this service is installed in.
func GetInstallNamespace() string {
	return env.Get(InstallNamespaceEnvVar, env.Get(KubecostNamespaceEnvVar, "opencost"))
}

// GetPodName returns the name of the current running pod. If this environment variable is not set,
// empty string is returned.
func GetPodName() string {
	return env.Get(PodNameEnvVar, "")
}

// GetClusterProfile returns the environment variable value for ClusterProfileEnvVar which
// represents the cluster profile configured for
func GetClusterProfile() string {
	return env.Get(ClusterProfileEnvVar, "development")
}

// GetClusterID returns the environment variable value for ClusterIDEnvVar which represents the
// configurable identifier used for multi-cluster metric emission.
func GetClusterID() string {
	return env.Get(ClusterIDEnvVar, "")
}

func IsKubeRbacProxyEnabled() bool {
	return env.GetBool(KubeRbacProxyEnabled, false)
}

// IsRemoteEnabled returns the environment variable value for RemoteEnabledEnvVar which represents whether
// or not remote write is enabled for prometheus for use with SQL backed persistent storage.
func IsRemoteEnabled() bool {
	return env.GetBool(RemoteEnabledEnvVar, false)
}

// GetRemotePW returns the environment variable value for RemotePWEnvVar which represents the remote
// persistent storage password.
func GetRemotePW() string {
	return env.Get(RemotePWEnvVar, "")
}

// GetSQLAddress returns the environment variable value for SQLAddressEnvVar which represents the SQL
// database address used with remote persistent storage.
func GetSQLAddress() string {
	return env.Get(SQLAddressEnvVar, "")
}

// IsUseCSVProvider returns the environment variable value for UseCSVProviderEnvVar which represents
// whether or not the use of a CSV cost provider is enabled.
func IsUseCSVProvider() bool {
	return env.GetBool(UseCSVProviderEnvVar, false)
}

// IsUseCustomProvider returns the environment variable value for UseCustomProviderEnvVar which represents
// whether or not the use of a custom cost provider is enabled.
func IsUseCustomProvider() bool {
	return env.GetBool(UseCustomProviderEnvVar, false)
}

// GetCSVRegion returns the environment variable value for CSVRegionEnvVar which represents the
// region configured for a CSV provider.
func GetCSVRegion() string {
	return env.Get(CSVRegionEnvVar, "")
}

// GetCSVEndpoint returns the environment variable value for CSVEndpointEnvVar which represents the
// endpoint configured for a S3 CSV provider another than AWS S3.
func GetCSVEndpoint() string {
	return env.Get(CSVEndpointEnvVar, "")
}

// GetCSVPath returns the environment variable value for CSVPathEnvVar which represents the key path
// configured for a CSV provider.
func GetCSVPath() string {
	return env.Get(CSVPathEnvVar, "")
}

// GetCostAnalyzerVolumeMountPath is an alias of GetConfigPath, which returns the mount path for the
// Cost Analyzer volume, which stores configs, persistent data, etc.
func GetCostAnalyzerVolumeMountPath() string {
	return GetConfigPathWithDefault(DefaultConfigMountPath)
}

// GetConfigPath returns the environment variable value for ConfigPathEnvVar which represents the cost
// model configuration path
func GetConfigPathWithDefault(defaultValue string) string {
	return env.Get(ConfigPathEnvVar, defaultValue)
}

// GetCloudProviderAPI returns the environment variable value for CloudProviderAPIEnvVar which represents
// the API key provided for the cloud provider.
func GetCloudProviderAPIKey() string {
	return env.Get(CloudProviderAPIKeyEnvVar, "")
}

func GetPVMountPath() string {
	return env.Get(PVMountPath, "")
}

// IsCollectorDataSourceEnabeled returns the environment variable which enables a source.OpencostDatasource which does not use uses Prometheus
func IsCollectorDataSourceEnabled() bool {
	return env.GetBool(CollectorDataSourceEnabledEnvVar, false)
}

// IsLogCollectionEnabled returns the environment variable value for LogCollectionEnabledEnvVar which represents
// whether or not log collection has been enabled for kubecost deployments.
func IsLogCollectionEnabled() bool {
	return env.GetBool(LogCollectionEnabledEnvVar, true)
}

// IsProductAnalyticsEnabled returns the environment variable value for ProductAnalyticsEnabledEnvVar
func IsProductAnalyticsEnabled() bool {
	return env.GetBool(ProductAnalyticsEnabledEnvVar, true)
}

// IsErrorReportingEnabled returns the environment variable value for ErrorReportingEnabledEnvVar
func IsErrorReportingEnabled() bool {
	return env.GetBool(ErrorReportingEnabledEnvVar, true)
}

// IsValuesReportingEnabled returns the environment variable value for ValuesReportingEnabledEnvVar
func IsValuesReportingEnabled() bool {
	return env.GetBool(ValuesReportingEnabledEnvVar, true)
}

// GetKubeConfigPath returns the environment variable value for KubeConfigPathEnvVar
func GetKubeConfigPath() string {
	return env.Get(KubeConfigPathEnvVar, "")
}

// GetUTCOffset returns the environment variable value for UTCOffset
func GetUTCOffset() string {
	return env.Get(UTCOffsetEnvVar, "")
}

// GetParsedUTCOffset returns the duration of the configured UTC offset
func GetParsedUTCOffset() time.Duration {
	offset, err := timeutil.ParseUTCOffset(GetUTCOffset())
	if err != nil {
		log.Warnf("Failed to parse UTC offset: %s", err)
		return time.Duration(0)
	}
	return offset
}

func IsETLEnabled() bool {
	return env.GetBool(ETLEnabledEnvVar, true)
}

// GetETLResolution determines the resolution of ETL queries. The smaller the
// duration, the higher the resolution; the higher the resolution, the more
// accurate the query results, but the more computationally expensive.
func GetETLResolution() time.Duration {
	// Use the configured ETL resolution, or default to
	// 5m (i.e. 300s)
	secs := time.Duration(env.GetInt64(ETLResolutionSeconds, 300))
	return secs * time.Second
}

// IsIngestingPodUID returns the env variable from ingestPodUID, which alters the
// contents of podKeys in Allocation
func IsIngestingPodUID() bool {
	return env.GetBool(IngestPodUIDEnvVar, false)
}

func IsAllocationNodeLabelsEnabled() bool {
	return env.GetBool(AllocationNodeLabelsEnabled, true)
}

func IsAssetIncludeLocalDiskCost() bool {
	return env.GetBool(AssetIncludeLocalDiskCostEnvVar, true)
}

func GetRegionOverrideList() []string {
	regionList := env.GetList(regionOverrideList, ",")

	if regionList == nil {
		return []string{}
	}

	return regionList
}

func GetDataRetentionDailyResolutionDays() int64 {
	return env.GetInt64(DataRetentionDailyResolutionDaysEnvVar, 30)
}

func GetDataRetentionHourlyResolutionHours() int64 {
	return env.GetInt64(DataRetentionHourlyResolutionHoursEnvVar, 49)
}

func IsKubernetesEnabled() bool {
	return env.Get(KubernetesEnabledEnvVar, "") != ""
}

func IsCloudCostEnabled() bool {
	return env.GetBool(CloudCostEnabledEnvVar, false)
}

func IsCustomCostEnabled() bool {
	return env.GetBool(CustomCostEnabledEnvVar, false)
}

func GetCloudCostConfigPath() string {
	return env.Get(CloudCostConfigPath, "cloud-integration.json")
}

func GetCloudCostMonthToDateInterval() int {
	return env.GetInt(CloudCostMonthToDateIntervalVar, 6)
}

func GetCloudCostRefreshRateHours() int64 {
	return env.GetInt64(CloudCostRefreshRateHoursEnvVar, 6)
}

func GetCloudCostQueryWindowDays() int64 {
	return env.GetInt64(CloudCostQueryWindowDaysEnvVar, 7)
}

func GetCustomCostQueryWindowHours() int64 {
	return env.GetInt64(CustomCostQueryWindowDaysEnvVar, 1)
}

func GetCustomCostQueryWindowDays() int64 {
	return env.GetInt64(CustomCostQueryWindowDaysEnvVar, 7)
}

func GetCloudCostRunWindowDays() int64 {
	return env.GetInt64(CloudCostRunWindowDaysEnvVar, 3)
}

func GetOCIPricingURL() string {
	return env.Get(OCIPricingURL, "https://apexapps.oracle.com/pls/apex/cetools/api/v1/products")
}

func GetPluginConfigDir() string {
	return env.Get(PluginConfigDirEnvVar, "/opt/opencost/plugin/config")
}

func GetPluginExecutableDir() string {
	return env.Get(PluginExecutableDirEnvVar, "/opt/opencost/plugin/bin")
}

func GetCustomCostRefreshRateHours() string {
	return env.Get(CustomCostRefreshRateHoursEnvVar, "12h")
}

func IsCarbonEstimatesEnabled() bool {
	return env.GetBool(CarbonEstimatesEnabledEnvVar, false)
}

func GetExportBucketConfigFile() string {
	return env.Get(ExportBucketConfigFileEnvVar, "")
}

// GetUseCacheV1 is a temporary flag to allow users to opt-in to using the old cache
// Mainly for comparison purposes
func GetUseCacheV1() bool {
	return env.GetBool(UseCacheV1, false)
}

func GetReleaseName() string {
	return env.Get(ReleaseNameEnvVar, "kubecost")
}

func GetNetworkCostsPort() int {
	return env.GetInt(NetworkCostsPortEnvVar, 3001)
}

// IsNodeStatsForceKubeProxy returns true if the node stats client should force the kube proxy direct end
// point formatting
func IsNodeStatsForceKubeProxy() bool {
	return env.GetBool(NodeStatsForceKubeProxyEnvVar, false)
}

// GetNodeStatsLocalProxy returns the fully qualified local proxy endpoint for the node stats client IFF the proxyAPI
// is selected.
func GetNodeStatsLocalProxy() string {
	return env.Get(NodeStatsLocalProxyEnvVar, "")
}

// IsNodeStatsInsecure returns true if the node stats client should skip TLS verification
func IsNodeStatsInsecure() bool {
	return env.GetBool(NodeStatsInsecureEnvVar, false)
}

// GetNodeStatsCertFile returns the path of the cert file
func GetNodeStatsCertFile() string {
	return env.Get(NodeStatsCertFileEnvVar, "")
}

// GetNodeStatsKeyFile returns the path of the key file
func GetNodeStatsKeyFile() string {
	return env.Get(NodeStatsKeyFileEnvVar, "")
}