cost-model/pkg/cloud/aws/provider.go

package aws

import (
	"bytes"
	"compress/gzip"
	"context"
	"encoding/csv"
	"errors"
	"fmt"
	"io"
	"net/http"
	"os"
	"regexp"
	"strconv"
	"strings"
	"sync"
	"time"

	"github.com/aws/smithy-go"
	"github.com/opencost/opencost/pkg/cloud/httputil"
	"github.com/opencost/opencost/pkg/cloud/models"
	"github.com/opencost/opencost/pkg/cloud/utils"

	"github.com/opencost/opencost/core/pkg/clustercache"
	coreenv "github.com/opencost/opencost/core/pkg/env"
	errs "github.com/opencost/opencost/core/pkg/errors"
	"github.com/opencost/opencost/core/pkg/log"
	"github.com/opencost/opencost/core/pkg/opencost"
	"github.com/opencost/opencost/core/pkg/util"
	"github.com/opencost/opencost/core/pkg/util/fileutil"
	"github.com/opencost/opencost/core/pkg/util/json"
	"github.com/opencost/opencost/core/pkg/util/timeutil"
	"github.com/opencost/opencost/pkg/env"

	awsSDK "github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/config"
	"github.com/aws/aws-sdk-go-v2/credentials/stscreds"
	"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
	"github.com/aws/aws-sdk-go-v2/service/athena"
	athenaTypes "github.com/aws/aws-sdk-go-v2/service/athena/types"
	"github.com/aws/aws-sdk-go-v2/service/ec2"
	ec2Types "github.com/aws/aws-sdk-go-v2/service/ec2/types"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/aws/aws-sdk-go-v2/service/sts"

	"github.com/jszwec/csvutil"
)

const (
	supportedSpotFeedVersion = "1"
	SpotInfoUpdateType       = "spotinfo"
	AthenaInfoUpdateType     = "athenainfo"
	PreemptibleType          = "preemptible"

	APIPricingSource              = "Public API"
	SpotPricingSource             = "Spot Data Feed"
	SpotPriceHistorySource        = "Spot Price History"
	ReservedInstancePricingSource = "Savings Plan, Reserved Instance, and Out-Of-Cluster"
	FargatePricingSource          = "Fargate"

	InUseState    = "in-use"
	AttachedState = "attached"

	AWSHourlyPublicIPCost    = 0.005
	EKSCapacityTypeLabel     = "eks.amazonaws.com/capacityType"
	EKSCapacitySpotTypeValue = "SPOT"

	// relevant to pricing url
	awsPricingBaseURL      = "https://pricing.us-east-1.amazonaws.com/offers/v1.0/aws/"
	awsChinaPricingBaseURL = "https://pricing.cn-north-1.amazonaws.com.cn/offers/v1.0/cn/"
	pricingCurrentPath     = "/current/"
	pricingIndexFile       = "index.json"
	chinaRegionPrefix      = "cn-"
)

var (
	// It's of the form aws:///us-east-2a/i-0fea4fd46592d050b and we want i-0fea4fd46592d050b, if it exists
	provIdRx      = regexp.MustCompile("aws:///([^/]+)/([^/]+)")
	usageTypeRegx = regexp.MustCompile(".*(-|^)(EBS.+)")
	versionRx     = regexp.MustCompile(`^#Version: (\\d+)\\.\\d+$`)
	regionRx      = regexp.MustCompile("([a-z]+-[a-z]+-[0-9])")

	ErrNoAthenaBucket = errors.New("No Athena Bucket configured")

	// StorageClassProvisionerDefaults specifies the default storage class types depending upon the provisioner
	StorageClassProvisionerDefaults = map[string]string{
		"kubernetes.io/aws-ebs": "gp2",
		"ebs.csi.aws.com":       "gp3",
		// TODO: add efs provisioner
	}
)

func (aws *AWS) PricingSourceStatus() map[string]*models.PricingSource {
	sources := make(map[string]*models.PricingSource)

	sps := &models.PricingSource{
		Name:    SpotPricingSource,
		Enabled: true,
	}

	if aws.SpotFeedRefreshEnabled() {
		sps.Error = ""
		if aws.SpotPricingError != nil {
			sps.Error = aws.SpotPricingError.Error()
		}
		if sps.Error != "" {
			sps.Available = false
		} else if len(aws.SpotPricingByInstanceID) > 0 {
			sps.Available = true
		} else {
			sps.Error = "No spot instances detected"
		}
	} else {
		sps.Available = false
		sps.Error = "Spot instances not set up"
		sps.Enabled = false
	}
	sources[SpotPricingSource] = sps

	sphs := &models.PricingSource{
		Name:    SpotPriceHistorySource,
		Enabled: true,
	}
	if aws.SpotPriceHistoryError != nil {
		sphs.Error = aws.SpotPriceHistoryError.Error()
		sphs.Available = false
	} else if aws.SpotPriceHistoryCache == nil {
		sphs.Error = "Not yet initialized"
		sphs.Available = false
	} else {
		sphs.Available = true
	}
	sources[SpotPriceHistorySource] = sphs

	rps := &models.PricingSource{
		Name:    ReservedInstancePricingSource,
		Enabled: true,
	}
	rps.Error = ""
	if aws.RIPricingError != nil {
		rps.Error = aws.RIPricingError.Error()
	}
	if rps.Error != "" {
		rps.Available = false
	} else {
		rps.Available = true
	}
	sources[ReservedInstancePricingSource] = rps

	fs := &models.PricingSource{
		Name:      FargatePricingSource,
		Enabled:   true,
		Available: true,
	}
	if aws.FargatePricingError != nil {
		fs.Error = aws.FargatePricingError.Error()
		fs.Available = false
	}
	sources[FargatePricingSource] = fs

	return sources
}

// SpotRefreshDuration represents how much time must pass before we refresh
const SpotRefreshDuration = 15 * time.Minute

var awsRegions = []string{
	"us-east-2",
	"us-east-1",
	"us-west-1",
	"us-west-2",
	"ap-east-1",
	"ap-south-1",
	"ap-northeast-3",
	"ap-northeast-2",
	"ap-southeast-1",
	"ap-southeast-2",
	"ap-northeast-1",
	"ap-southeast-3",
	"ca-central-1",
	"cn-north-1",
	"cn-northwest-1",
	"eu-central-1",
	"eu-west-1",
	"eu-west-2",
	"eu-west-3",
	"eu-north-1",
	"eu-south-1",
	"me-south-1",
	"sa-east-1",
	"af-south-1",
	"us-gov-east-1",
	"us-gov-west-1",
	"me-central-1",
}

// AWS represents an Amazon Provider
type AWS struct {
	Pricing                     map[string]*AWSProductTerms
	SpotPricingByInstanceID     map[string]*spotInfo
	SpotPricingUpdatedAt        *time.Time
	SpotRefreshRunning          bool
	SpotPricingLock             sync.RWMutex
	SpotPricingError            error
	SpotPriceHistoryCache       *SpotPriceHistoryCache
	SpotPriceHistoryError       error
	RIPricingByInstanceID       map[string]*RIData
	RIPricingError              error
	RIDataRunning               bool
	RIDataLock                  sync.RWMutex
	SavingsPlanDataByInstanceID map[string]*SavingsPlanData
	SavingsPlanDataRunning      bool
	SavingsPlanDataLock         sync.RWMutex
	FargatePricing              *FargatePricing
	FargatePricingError         error
	ValidPricingKeys            map[string]bool
	Clientset                   clustercache.ClusterCache
	BaseCPUPrice                string
	BaseRAMPrice                string
	BaseGPUPrice                string
	BaseSpotCPUPrice            string
	BaseSpotRAMPrice            string
	BaseSpotGPUPrice            string
	SpotLabelName               string
	SpotLabelValue              string
	SpotDataRegion              string
	SpotDataBucket              string
	SpotDataPrefix              string
	ProjectID                   string
	DownloadPricingDataLock     sync.RWMutex
	Config                      models.ProviderConfig
	ServiceAccountChecks        *models.ServiceAccountChecks
	clusterManagementPrice      float64
	ClusterRegion               string
	ClusterAccountID            string
	clusterProvisioner          string
}

// AWSAccessKey holds AWS credentials and fulfils the awsV2.CredentialsProvider interface
// Deprecated: v1.104 Use AccessKey instead
type AWSAccessKey struct {
	AccessKeyID     string `json:"aws_access_key_id"`
	SecretAccessKey string `json:"aws_secret_access_key"`
}

// Retrieve returns a set of awsV2 credentials using the AWSAccessKey's key and secret.
// This fulfils the awsV2.CredentialsProvider interface contract.
func (accessKey AWSAccessKey) Retrieve(ctx context.Context) (awsSDK.Credentials, error) {
	return awsSDK.Credentials{
		AccessKeyID:     accessKey.AccessKeyID,
		SecretAccessKey: accessKey.SecretAccessKey,
	}, nil
}

// CreateConfig creates an AWS SDK V2 Config for the credentials that it contains for the provided region
func (accessKey AWSAccessKey) CreateConfig(region string) (awsSDK.Config, error) {
	var cfg awsSDK.Config
	var err error
	// If accessKey values have not been provided, attempt to load cfg from service key annotations
	if accessKey.AccessKeyID == "" && accessKey.SecretAccessKey == "" {
		cfg, err = config.LoadDefaultConfig(context.TODO(), config.WithRegion(region))
		if err != nil {
			return cfg, fmt.Errorf("failed to initialize AWS SDK config for region from annotation %s: %s", region, err)
		}
	} else {
		// The AWS SDK v2 requires an object fulfilling the CredentialsProvider interface, which cloud.AWSAccessKey does
		cfg, err = config.LoadDefaultConfig(context.TODO(), config.WithCredentialsProvider(accessKey), config.WithRegion(region))
		if err != nil {
			return cfg, fmt.Errorf("failed to initialize AWS SDK config for region %s: %s", region, err)
		}
	}

	return cfg, nil
}

// AWSPricing maps a k8s node to an AWS Pricing "product"
type AWSPricing struct {
	Products map[string]*AWSProduct `json:"products"`
	Terms    AWSPricingTerms        `json:"terms"`
}

// AWSProduct represents a purchased SKU
type AWSProduct struct {
	Sku        string               `json:"sku"`
	Attributes AWSProductAttributes `json:"attributes"`
}

// AWSProductAttributes represents metadata about the product used to map to a node.
type AWSProductAttributes struct {
	Location        string `json:"location"`
	RegionCode      string `json:"regionCode"`
	Operation       string `json:"operation"`
	InstanceType    string `json:"instanceType"`
	Memory          string `json:"memory"`
	Storage         string `json:"storage"`
	VCpu            string `json:"vcpu"`
	UsageType       string `json:"usagetype"`
	OperatingSystem string `json:"operatingSystem"`
	PreInstalledSw  string `json:"preInstalledSw"`
	InstanceFamily  string `json:"instanceFamily"`
	CapacityStatus  string `json:"capacitystatus"`
	GPU             string `json:"gpu"` // GPU represents the number of GPU on the instance
	MarketOption    string `json:"marketOption"`
}

// AWSPricingTerms are how you pay for the node: OnDemand, Reserved, or (TODO) Spot
type AWSPricingTerms struct {
	OnDemand map[string]map[string]*AWSOfferTerm `json:"OnDemand"`
	Reserved map[string]map[string]*AWSOfferTerm `json:"Reserved"`
}

// AWSOfferTerm is a sku extension used to pay for the node.
type AWSOfferTerm struct {
	Sku             string                  `json:"sku"`
	OfferTermCode   string                  `json:"offerTermCode"`
	PriceDimensions map[string]*AWSRateCode `json:"priceDimensions"`
}

func (ot *AWSOfferTerm) String() string {
	var strs []string
	for k, rc := range ot.PriceDimensions {
		strs = append(strs, fmt.Sprintf("%s:%s", k, rc.String()))
	}
	return fmt.Sprintf("%s:%s", ot.Sku, strings.Join(strs, ","))
}

// AWSRateCode encodes data about the price of a product
type AWSRateCode struct {
	Unit         string          `json:"unit"`
	PricePerUnit AWSCurrencyCode `json:"pricePerUnit"`
}

func (rc *AWSRateCode) String() string {
	return fmt.Sprintf("{unit: %s, pricePerUnit: %v", rc.Unit, rc.PricePerUnit)
}

// AWSCurrencyCode is the localized currency. (TODO: support non-USD)
type AWSCurrencyCode struct {
	USD string `json:"USD,omitempty"`
	CNY string `json:"CNY,omitempty"`
}

// AWSProductTerms represents the full terms of the product
type AWSProductTerms struct {
	Sku          string               `json:"sku"`
	OnDemand     *AWSOfferTerm        `json:"OnDemand"`
	Reserved     *AWSOfferTerm        `json:"Reserved"`
	Memory       string               `json:"memory"`
	Storage      string               `json:"storage"`
	VCpu         string               `json:"vcpu"`
	GPU          string               `json:"gpu"` // GPU represents the number of GPU on the instance
	PV           *models.PV           `json:"pv"`
	LoadBalancer *models.LoadBalancer `json:"load_balancer"`
}

// ClusterIdEnvVar is the environment variable in which one can manually set the ClusterId
const ClusterIdEnvVar = "AWS_CLUSTER_ID"

// OnDemandRateCodes is are sets of identifiers for offerTermCodes matching 'On Demand' rates
var OnDemandRateCodes = map[string]struct{}{
	"JRTCKXETXF": {},
}

var OnDemandRateCodesCn = map[string]struct{}{
	"99YE2YK9UR": {},
	"5Y9WH78GDR": {},
	"KW44MY7SZN": {},
}

// HourlyRateCode is appended to a node sku
const (
	HourlyRateCode   = "6YS6EN2CT7"
	HourlyRateCodeCn = "Q7UJUT2CE6"
)

// volTypes are used to map between AWS UsageTypes and
// EBS volume types, as they would appear in K8s storage class
// name and the EC2 API.
var volTypes = map[string]string{
	"EBS:VolumeUsage.gp2":    "gp2",
	"EBS:VolumeUsage.gp3":    "gp3",
	"EBS:VolumeUsage":        "standard",
	"EBS:VolumeUsage.sc1":    "sc1",
	"EBS:VolumeP-IOPS.piops": "io1",
	"EBS:VolumeUsage.st1":    "st1",
	"EBS:VolumeUsage.piops":  "io1",
	"EBS:VolumeUsage.io2":    "io2",
	"gp2":                    "EBS:VolumeUsage.gp2",
	"gp3":                    "EBS:VolumeUsage.gp3",
	"standard":               "EBS:VolumeUsage",
	"sc1":                    "EBS:VolumeUsage.sc1",
	"io1":                    "EBS:VolumeUsage.piops",
	"st1":                    "EBS:VolumeUsage.st1",
	"io2":                    "EBS:VolumeUsage.io2",
}

var (
	loadedAWSSecret bool          = false
	awsSecret       *AWSAccessKey = nil
)

// KubeAttrConversion maps the k8s labels for region to an AWS key
func (aws *AWS) KubeAttrConversion(region, instanceType, operatingSystem string) string {
	operatingSystem = strings.ToLower(operatingSystem)

	return region + "," + instanceType + "," + operatingSystem
}

// AwsSpotFeedInfo contains configuration for spot feed integration
type AwsSpotFeedInfo struct {
	BucketName       string `json:"bucketName"`
	Prefix           string `json:"prefix"`
	Region           string `json:"region"`
	AccountID        string `json:"projectID"`
	ServiceKeyName   string `json:"serviceKeyName"`
	ServiceKeySecret string `json:"serviceKeySecret"`
	SpotLabel        string `json:"spotLabel"`
	SpotLabelValue   string `json:"spotLabelValue"`
}

// AwsAthenaInfo contains configuration for CUR integration
// Deprecated: v1.104 Use AthenaConfiguration instead
type AwsAthenaInfo struct {
	AthenaBucketName string `json:"athenaBucketName"`
	AthenaRegion     string `json:"athenaRegion"`
	AthenaDatabase   string `json:"athenaDatabase"`
	AthenaCatalog    string `json:"athenaCatalog"`
	AthenaTable      string `json:"athenaTable"`
	AthenaWorkgroup  string `json:"athenaWorkgroup"`
	ServiceKeyName   string `json:"serviceKeyName"`
	ServiceKeySecret string `json:"serviceKeySecret"`
	AccountID        string `json:"projectID"`
	MasterPayerARN   string `json:"masterPayerARN"`
}

// IsEmpty returns true if all fields in config are empty, false if not.
func (aai *AwsAthenaInfo) IsEmpty() bool {
	return aai.AthenaBucketName == "" &&
		aai.AthenaRegion == "" &&
		aai.AthenaDatabase == "" &&
		aai.AthenaCatalog == "" &&
		aai.AthenaTable == "" &&
		aai.AthenaWorkgroup == "" &&
		aai.ServiceKeyName == "" &&
		aai.ServiceKeySecret == "" &&
		aai.AccountID == "" &&
		aai.MasterPayerARN == ""
}

// CreateConfig creates an AWS SDK V2 Config for the credentials that it contains
func (aai *AwsAthenaInfo) CreateConfig() (awsSDK.Config, error) {
	keyProvider := AWSAccessKey{AccessKeyID: aai.ServiceKeyName, SecretAccessKey: aai.ServiceKeySecret}
	cfg, err := keyProvider.CreateConfig(aai.AthenaRegion)
	if err != nil {
		return cfg, err
	}
	if aai.MasterPayerARN != "" {
		// Create the credentials from AssumeRoleProvider to assume the role
		// referenced by the roleARN.
		stsSvc := sts.NewFromConfig(cfg)
		creds := stscreds.NewAssumeRoleProvider(stsSvc, aai.MasterPayerARN)
		cfg.Credentials = awsSDK.NewCredentialsCache(creds)
	}
	return cfg, nil
}

func (aws *AWS) GetManagementPlatform() (string, error) {
	nodes := aws.Clientset.GetAllNodes()

	if len(nodes) > 0 {
		n := nodes[0]
		version := n.Status.NodeInfo.KubeletVersion
		if strings.Contains(version, "eks") {
			return "eks", nil
		}
		if _, ok := n.Labels["kops.k8s.io/instancegroup"]; ok {
			return "kops", nil
		}
	}
	return "", nil
}

func (aws *AWS) GetConfig() (*models.CustomPricing, error) {
	c, err := aws.Config.GetCustomPricingData()
	if err != nil {
		return nil, err
	}
	if c.Discount == "" {
		c.Discount = "0%"
	}
	if c.NegotiatedDiscount == "" {
		c.NegotiatedDiscount = "0%"
	}

	return c, nil
}

// GetAWSAccessKey generate an AWSAccessKey object from the config
func (aws *AWS) GetAWSAccessKey() (*AWSAccessKey, error) {
	config, err := aws.GetConfig()
	if err != nil {
		return nil, fmt.Errorf("could not retrieve AwsAthenaInfo %s", err)
	}
	err = aws.ConfigureAuthWith(config)
	if err != nil {
		return nil, fmt.Errorf("error configuring Cloud Provider %s", err)
	}
	// Look for service key values in env if not present in config
	if config.AwsServiceKeyName == "" {
		config.AwsServiceKeyName = env.GetAWSAccessKeyID()
	}
	if config.AwsServiceKeySecret == "" {
		config.AwsServiceKeySecret = env.GetAWSAccessKeySecret()
	}

	if config.AwsServiceKeyName == "" && config.AwsServiceKeySecret == "" {
		log.DedupedInfof(1, "missing service key values for AWS cloud integration attempting to use service account integration")
	}

	return &AWSAccessKey{AccessKeyID: config.AwsServiceKeyName, SecretAccessKey: config.AwsServiceKeySecret}, nil
}

// GetAWSAthenaInfo generate an AWSAthenaInfo object from the config
func (aws *AWS) GetAWSAthenaInfo() (*AwsAthenaInfo, error) {
	config, err := aws.GetConfig()
	if err != nil {
		return nil, fmt.Errorf("could not retrieve AwsAthenaInfo %s", err)
	}

	aak, err := aws.GetAWSAccessKey()
	if err != nil {
		return nil, err
	}

	return &AwsAthenaInfo{
		AthenaBucketName: config.AthenaBucketName,
		AthenaRegion:     config.AthenaRegion,
		AthenaDatabase:   config.AthenaDatabase,
		AthenaCatalog:    config.AthenaCatalog,
		AthenaTable:      config.AthenaTable,
		AthenaWorkgroup:  config.AthenaWorkgroup,
		ServiceKeyName:   aak.AccessKeyID,
		ServiceKeySecret: aak.SecretAccessKey,
		AccountID:        config.AthenaProjectID,
		MasterPayerARN:   config.MasterPayerARN,
	}, nil
}

func (aws *AWS) UpdateConfigFromConfigMap(cm map[string]string) (*models.CustomPricing, error) {
	return aws.Config.UpdateFromMap(cm)
}

func configUpdaterWithReaderAndType(r io.Reader, updateType string) func(c *models.CustomPricing) error {
	return func(c *models.CustomPricing) error {
		switch updateType {
		case SpotInfoUpdateType:
			asfi := AwsSpotFeedInfo{}
			err := json.NewDecoder(r).Decode(&asfi)
			if err != nil {
				return err
			}

			c.AwsServiceKeyName = asfi.ServiceKeyName
			if asfi.ServiceKeySecret != "" {
				c.AwsServiceKeySecret = asfi.ServiceKeySecret
			}
			c.AwsSpotDataPrefix = asfi.Prefix
			c.AwsSpotDataBucket = asfi.BucketName
			c.ProjectID = asfi.AccountID
			c.AwsSpotDataRegion = asfi.Region
			c.SpotLabel = asfi.SpotLabel
			c.SpotLabelValue = asfi.SpotLabelValue

		case AthenaInfoUpdateType:
			aai := AwsAthenaInfo{}
			err := json.NewDecoder(r).Decode(&aai)
			if err != nil {
				return err
			}

			c.AthenaBucketName = aai.AthenaBucketName
			c.AthenaRegion = aai.AthenaRegion
			c.AthenaDatabase = aai.AthenaDatabase
			c.AthenaCatalog = aai.AthenaCatalog
			c.AthenaTable = aai.AthenaTable
			c.AthenaWorkgroup = aai.AthenaWorkgroup
			c.AwsServiceKeyName = aai.ServiceKeyName
			if aai.ServiceKeySecret != "" {
				c.AwsServiceKeySecret = aai.ServiceKeySecret
			}
			if aai.MasterPayerARN != "" {
				c.MasterPayerARN = aai.MasterPayerARN
			}
			c.AthenaProjectID = aai.AccountID
		default:
			a := make(map[string]any)
			err := json.NewDecoder(r).Decode(&a)
			if err != nil {
				return err
			}
			for k, v := range a {
				kUpper := utils.ToTitle.String(k) // Just so we consistently supply / receive the same values, uppercase the first letter.
				vstr, ok := v.(string)
				if ok {
					err := models.SetCustomPricingField(c, kUpper, vstr)
					if err != nil {
						return fmt.Errorf("error setting custom pricing field: %w", err)
					}
				} else {
					return fmt.Errorf("type error while updating config for %s", kUpper)
				}
			}
		}

		if env.IsRemoteEnabled() {
			err := utils.UpdateClusterMeta(coreenv.GetClusterID(), c.ClusterName)
			if err != nil {
				return err
			}
		}
		return nil
	}
}

func (aws *AWS) UpdateConfig(r io.Reader, updateType string) (*models.CustomPricing, error) {
	return aws.Config.Update(configUpdaterWithReaderAndType(r, updateType))
}

type awsKey struct {
	Name           string
	SpotLabelName  string
	SpotLabelValue string
	Labels         map[string]string
	ProviderID     string
}

func (k *awsKey) GPUCount() int {
	return 0
}

func (k *awsKey) GPUType() string {
	return ""
}

func (k *awsKey) ID() string {
	for matchNum, group := range provIdRx.FindStringSubmatch(k.ProviderID) {
		if matchNum == 2 {
			return group
		}
	}
	log.Warnf("Could not find instance ID in \"%s\"", k.ProviderID)
	return ""
}

// Features will return a comma separated list of features for the given node
// If the node has a spot label, it will be included in the list
// Otherwise, the list include instance type, operating system, and the region
func (k *awsKey) Features() string {
	instanceType, _ := util.GetInstanceType(k.Labels)
	operatingSystem, _ := util.GetOperatingSystem(k.Labels)
	region, _ := util.GetRegion(k.Labels)

	key := region + "," + instanceType + "," + operatingSystem
	usageType := k.getUsageType(k.Labels)
	spotKey := key + "," + usageType
	if l, ok := k.Labels["lifecycle"]; ok && l == "EC2Spot" {
		return spotKey
	}
	if l, ok := k.Labels[k.SpotLabelName]; ok && l == k.SpotLabelValue {
		return spotKey
	}
	if usageType == PreemptibleType {
		return spotKey
	}
	return key
}

const eksComputeTypeLabel = "eks.amazonaws.com/compute-type"

func (k *awsKey) isFargateNode() bool {
	v := k.Labels[eksComputeTypeLabel]
	if v == "fargate" {
		return true
	}
	return false
}

// getUsageType returns the usage type of the instance
// If the instance is a spot instance, it will return PreemptibleType
// Otherwise returns an empty string
func (k *awsKey) getUsageType(labels map[string]string) string {
	if kLabel, ok := labels[k.SpotLabelName]; ok && kLabel == k.SpotLabelValue {
		return PreemptibleType
	}
	if eksLabel, ok := labels[EKSCapacityTypeLabel]; ok && eksLabel == EKSCapacitySpotTypeValue {
		// We currently write out spot instances as "preemptible" in the pricing data, so these need to match
		return PreemptibleType
	}
	if kLabel, ok := labels[models.KarpenterCapacityTypeLabel]; ok && kLabel == models.KarpenterCapacitySpotTypeValue {
		return PreemptibleType
	}
	return ""
}

func (awsProvider *AWS) GpuPricing(nodeLabels map[string]string) (string, error) {
	return "", nil
}

func (aws *AWS) PVPricing(pvk models.PVKey) (*models.PV, error) {
	pricing, ok := aws.Pricing[pvk.Features()]
	if !ok {
		log.Debugf("Persistent Volume pricing not found for %s: %s", pvk.GetStorageClass(), pvk.Features())
		return &models.PV{}, nil
	}
	return pricing.PV, nil
}

type awsPVKey struct {
	Labels                 map[string]string
	StorageClassParameters map[string]string
	StorageClassName       string
	Name                   string
	DefaultRegion          string
	ProviderID             string
}

func (aws *AWS) GetPVKey(pv *clustercache.PersistentVolume, parameters map[string]string, defaultRegion string) models.PVKey {
	providerID := ""
	if pv.Spec.AWSElasticBlockStore != nil {
		providerID = pv.Spec.AWSElasticBlockStore.VolumeID
	} else if pv.Spec.CSI != nil {
		providerID = pv.Spec.CSI.VolumeHandle
	}
	return &awsPVKey{
		Labels:                 pv.Labels,
		StorageClassName:       pv.Spec.StorageClassName,
		StorageClassParameters: parameters,
		Name:                   pv.Name,
		DefaultRegion:          defaultRegion,
		ProviderID:             providerID,
	}
}

func (key *awsPVKey) ID() string {
	return key.ProviderID
}

func (key *awsPVKey) GetStorageClass() string {
	return key.StorageClassName
}

func (key *awsPVKey) Features() string {
	storageClass, ok := key.StorageClassParameters["type"]
	if !ok {
		log.Debugf("storage class %s doesn't have a 'type' parameter", key.Name)
		storageClass = getStorageClassTypeFrom(key.StorageClassParameters["provisioner"])
	}

	if storageClass == "standard" {
		storageClass = "gp2"
	}
	// Storage class names are generally EBS volume types (gp2)
	// Keys in Pricing are based on UsageTypes (EBS:VolumeType.gp2)
	// Converts between the 2
	region, ok := util.GetRegion(key.Labels)
	if !ok {
		region = key.DefaultRegion
	}
	class, ok := volTypes[storageClass]
	if !ok {
		log.Debugf("No voltype mapping for %s's storageClass: %s", key.Name, storageClass)
	}
	return region + "," + class
}

// getStorageClassTypeFrom returns the default ebs volume type for a provider provisioner
func getStorageClassTypeFrom(provisioner string) string {
	// if there isn't any provided provisioner, return empty volume type
	if provisioner == "" {
		return ""
	}

	scType, ok := StorageClassProvisionerDefaults[provisioner]
	if ok {
		log.Debugf("using default voltype %s for provisioner %s", scType, provisioner)
		return scType
	}

	return ""
}

// GetKey maps node labels to information needed to retrieve pricing data
func (aws *AWS) GetKey(labels map[string]string, n *clustercache.Node) models.Key {
	return &awsKey{
		Name:           n.Name,
		SpotLabelName:  aws.SpotLabelName,
		SpotLabelValue: aws.SpotLabelValue,
		Labels:         labels,
		ProviderID:     labels["providerID"],
	}
}

func (aws *AWS) isPreemptible(key string) bool {
	s := strings.Split(key, ",")
	if len(s) == 4 && s[3] == PreemptibleType {
		return true
	}
	return false
}

func (aws *AWS) ClusterManagementPricing() (string, float64, error) {
	return aws.clusterProvisioner, aws.clusterManagementPrice, nil
}

func getPricingListURL(serviceCode string, nodeList []*clustercache.Node) string {
	// See https://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/using-the-aws-price-list-bulk-api-fetching-price-list-files-manually.html
	region := ""
	multiregion := false
	isChina := false

	for _, n := range nodeList {
		r, ok := util.GetRegion(n.Labels)
		if !ok {
			multiregion = true
			break
		}
		if strings.HasPrefix(r, chinaRegionPrefix) {
			isChina = true
		}

		if region == "" {
			region = r
		} else if r != region {
			multiregion = true
			break
		}
	}

	baseURL := awsPricingBaseURL + serviceCode + pricingCurrentPath
	if isChina {
		// Chinese regions are isolated and use a different pricing endpoint
		baseURL = awsChinaPricingBaseURL + serviceCode + pricingCurrentPath
	}

	if region != "" && !multiregion {
		baseURL += region + "/"
	}

	return baseURL + pricingIndexFile
}

// Use the pricing data from the current region. Fall back to using all region data if needed.
func (aws *AWS) getRegionPricing(nodeList []*clustercache.Node) (*http.Response, string, error) {
	var pricingURL string
	if env.GetAWSPricingURL() != "" { // Allow override of pricing URL
		pricingURL = env.GetAWSPricingURL()
	} else {
		pricingURL = getPricingListURL("AmazonEC2", nodeList)
	}

	log.Infof("starting download of \"%s\", which is quite large ...", pricingURL)
	// This file is large and can take a while to stream, so the streaming client
	// bounds connect/TLS/response-header time but not the total body read - enough
	// to bail on a hung endpoint without truncating a legitimate slow download.
	resp, err := httputil.StreamingGet(context.Background(), pricingURL)
	if err != nil {
		log.Errorf("Bogus fetch of \"%s\": %v", pricingURL, err)
		return nil, pricingURL, err
	}
	return resp, pricingURL, err
}

// SpotFeedRefreshEnabled determines whether the required configs to run the spot feed query have been set up
func (aws *AWS) SpotFeedRefreshEnabled() bool {
	// Guard against nil receiver
	if aws == nil {
		return false
	}

	// Fallback if config is not initialized
	if aws.Config == nil {
		return len(aws.SpotDataBucket) != 0 ||
			len(aws.SpotDataRegion) != 0 ||
			len(aws.ProjectID) != 0
	}

	// Check if spot data feed is explicitly disabled via config
	c, err := aws.Config.GetCustomPricingData()
	if err == nil && c.SpotDataFeedEnabled == "false" {
		return false
	}

	// Default behavior
	return len(aws.SpotDataBucket) != 0 ||
		len(aws.SpotDataRegion) != 0 ||
		len(aws.ProjectID) != 0
}

// DownloadPricingData fetches data from the AWS Pricing API
func (aws *AWS) DownloadPricingData() error {
	aws.DownloadPricingDataLock.Lock()
	defer aws.DownloadPricingDataLock.Unlock()
	c, err := aws.Config.GetCustomPricingData()
	if err != nil {
		log.Errorf("Error downloading default pricing data: %s", err.Error())
	}
	aws.BaseCPUPrice = c.CPU
	aws.BaseRAMPrice = c.RAM
	aws.BaseGPUPrice = c.GPU
	aws.BaseSpotCPUPrice = c.SpotCPU
	aws.BaseSpotRAMPrice = c.SpotRAM
	aws.BaseSpotGPUPrice = c.SpotGPU
	aws.SpotLabelName = c.SpotLabel
	aws.SpotLabelValue = c.SpotLabelValue
	aws.SpotDataBucket = c.AwsSpotDataBucket
	aws.SpotDataPrefix = c.AwsSpotDataPrefix
	aws.ProjectID = c.ProjectID
	aws.SpotDataRegion = c.AwsSpotDataRegion

	aws.ConfigureAuthWith(c) // load aws authentication from configuration or secret

	if len(aws.SpotDataBucket) != 0 && len(aws.ProjectID) == 0 {
		log.Warnf("using SpotDataBucket \"%s\" without ProjectID will not end well", aws.SpotDataBucket)
	}
	nodeList := aws.Clientset.GetAllNodes()

	inputkeys := make(map[string]bool)
	for _, n := range nodeList {

		if _, ok := n.Labels["eks.amazonaws.com/nodegroup"]; ok {
			aws.clusterManagementPrice = 0.10
			aws.clusterProvisioner = "EKS"
		} else if _, ok := n.Labels["kops.k8s.io/instancegroup"]; ok {
			aws.clusterProvisioner = "KOPS"
		}

		labels := n.Labels
		key := aws.GetKey(labels, n)
		inputkeys[key.Features()] = true
	}

	pvList := aws.Clientset.GetAllPersistentVolumes()

	storageClasses := aws.Clientset.GetAllStorageClasses()
	storageClassMap := make(map[string]map[string]string)
	for _, storageClass := range storageClasses {
		params := storageClass.Parameters
		if params != nil {
			params["provisioner"] = storageClass.Provisioner
		}
		storageClassMap[storageClass.Name] = params
		if storageClass.Annotations["storageclass.kubernetes.io/is-default-class"] == "true" || storageClass.Annotations["storageclass.beta.kubernetes.io/is-default-class"] == "true" {
			storageClassMap["default"] = params
			storageClassMap[""] = params
		}
	}

	pvkeys := make(map[string]models.PVKey)
	for _, pv := range pvList {
		params, ok := storageClassMap[pv.Spec.StorageClassName]
		if !ok {
			log.Infof("Unable to find params for storageClassName %s, falling back to default pricing", pv.Spec.StorageClassName)
			continue
		}
		key := aws.GetPVKey(pv, params, "")
		pvkeys[key.Features()] = key
	}

	// RIDataRunning establishes the existence of the goroutine. Since it's possible we
	// run multiple downloads, we don't want to create multiple go routines if one already exists
	//
	// If athenaBucketName is unconfigured, the ReservedInstanceData and SavingsPlanData watchers
	// are skipped. Note: These watchers are less commonly used. It is recommended to use the full
	// CloudCosts feature via athenaintegration.go.
	if !aws.RIDataRunning {
		err = aws.GetReservationDataFromAthena() // Block until one run has completed.
		if err != nil {
			if errors.Is(err, ErrNoAthenaBucket) {
				log.Debugf("No \"athenaBucketName\" configured, ReservedInstanceData watcher will not run")
			} else {
				log.Warnf("Failed to lookup reserved instance data: %s", err.Error())
			}
		} else { // If we make one successful run, check on new reservation data every hour
			go func() {
				defer errs.HandlePanic()
				aws.RIDataRunning = true

				for {
					log.Infof("Reserved Instance watcher running... next update in 1h")
					time.Sleep(time.Hour)
					err := aws.GetReservationDataFromAthena()
					if err != nil {
						log.Infof("Error updating RI data: %s", err.Error())
					}
				}
			}()
		}
	}
	if !aws.SavingsPlanDataRunning {
		err = aws.GetSavingsPlanDataFromAthena()
		if err != nil {
			if errors.Is(err, ErrNoAthenaBucket) {
				log.Debugf("No \"athenaBucketName\" configured, SavingsPlanData watcher will not run")
			} else {
				log.Errorf("Failed to lookup savings plan data: %s", err.Error())
			}
		} else {
			go func() {
				defer errs.HandlePanic()
				aws.SavingsPlanDataRunning = true
				for {
					log.Infof("Savings Plan watcher running... next update in 1h")
					time.Sleep(time.Hour)
					err := aws.GetSavingsPlanDataFromAthena()
					if err != nil {
						log.Infof("Error updating Savings Plan data: %s", err.Error())
					}
				}
			}()
		}
	}

	// Initialize fargate pricing if it's not initialized yet
	if aws.FargatePricing == nil {
		aws.FargatePricing = NewFargatePricing()
		aws.FargatePricingError = aws.FargatePricing.Initialize(nodeList)
		if aws.FargatePricingError != nil {
			log.Errorf("Failed to initialize fargate pricing: %s", aws.FargatePricingError.Error())
		}
	}

	aws.ValidPricingKeys = make(map[string]bool)

	resp, pricingURL, err := aws.getRegionPricing(nodeList)
	if err != nil {
		return err
	}
	err = aws.populatePricing(resp, inputkeys)
	if err != nil {
		return err
	}
	log.Infof("Finished downloading \"%s\"", pricingURL)

	// Initialize a spot price history cache if not already initialized.
	// Reset error to allow retrying on subsequent DownloadPricingData calls.
	if aws.SpotPriceHistoryCache == nil {
		aws.SpotPriceHistoryError = nil
		aws.SpotPriceHistoryCache, aws.SpotPriceHistoryError = aws.initializeSpotPriceHistoryCache()
		if aws.SpotPriceHistoryError != nil {
			log.Errorf("Failed to initialize spot price history manager: %v", aws.SpotPriceHistoryError)
		}
	}

	if aws.SpotFeedRefreshEnabled() {
		// Always run spot pricing refresh when performing download
		aws.refreshSpotPricing(true)

		// Only start a single refresh goroutine
		if !aws.SpotRefreshRunning {
			aws.SpotRefreshRunning = true

			go func() {
				defer errs.HandlePanic()

				for {
					log.Infof("Spot Pricing Refresh scheduled in %.2f minutes.", SpotRefreshDuration.Minutes())
					time.Sleep(SpotRefreshDuration)

					// Reoccurring refresh checks update times
					aws.refreshSpotPricing(false)
				}
			}()
		}
	}

	return nil
}

// populatePricing parses AWS pricing JSON response and populates the pricing map.
//
// AWS Pricing JSON Structure:
//
//	{
//	  "products": {
//	    "<SKU>": {
//	      "sku": "<SKU>",
//	      "attributes": { "instanceType": "...", "regionCode": "...", ... }
//	    },
//	    ...
//	  },
//	  "terms": {
//	    "OnDemand": {
//	      "<SKU>": {
//	        "<SKU>.<OfferTermCode>": {
//	          "offerTermCode": "...",
//	          "priceDimensions": {
//	            "<SKU>.<OfferTermCode>.<RateCode>": {
//	              "unit": "Hrs",
//	              "pricePerUnit": { "USD": "..." },
//	              "description": "..."
//	            }
//	          }
//	        }
//	      }
//	    }
//	  }
//	}
//
// This function uses streaming JSON parsing to handle large pricing files efficiently:
//  1. Parse "products" section: Extract SKUs and attributes for EC2 instances, EBS volumes, and load balancers
//  2. Parse "terms" section: Extract on-demand pricing for each SKU. Note: only the
//     first term-type key is read and processed if it equals "OnDemand", so this
//     assumes "OnDemand" precedes any "Reserved" terms.
//  3. Match SKUs to pricing keys and populate the pricing map
func (aws *AWS) populatePricing(resp *http.Response, inputkeys map[string]bool) error {
	aws.Pricing = make(map[string]*AWSProductTerms)
	skuToPricingKeyMap := make(map[string]string)
	dec := json.NewDecoder(resp.Body)

	// Stream through the JSON response token by token
	for {
		token, err := dec.Token()
		if err == io.EOF {
			log.Debugf("Finished parsing pricing data from \"%s\"", resp.Request.URL.String())
			break
		} else if err != nil {
			// Keep pricing parsed so far rather than discarding the whole region.
			log.Errorf("Error parsing pricing JSON response from \"%s\": %v", resp.Request.URL.String(), err)
			break
		}

		// Parse "products" section: Extract product metadata (SKU, instance type, region, etc.)
		if token == "products" {
			_, err := dec.Token() // opening "{"
			if err != nil {
				return err
			}

			for dec.More() {
				_, err := dec.Token() // SKU key
				if err != nil {
					return err
				}
				product := &AWSProduct{}

				err = dec.Decode(&product)
				if err != nil {
					// Fall through to terms so registered SKUs still get a non-nil OnDemand.
					log.Errorf("Error decoding product from \"%s\": %v", resp.Request.URL.String(), err)
					break
				}

				// Filter for EC2 compute instances (on-demand, no pre-installed software)
				if product.Attributes.PreInstalledSw == "NA" &&
					(strings.HasPrefix(product.Attributes.UsageType, "BoxUsage") || strings.Contains(product.Attributes.UsageType, "-BoxUsage")) &&
					product.Attributes.CapacityStatus == "Used" &&
					product.Attributes.MarketOption == "OnDemand" {
					key := aws.KubeAttrConversion(product.Attributes.RegionCode, product.Attributes.InstanceType, product.Attributes.OperatingSystem)
					spotKey := key + ",preemptible"
					// Only store pricing for instances we actually have in the cluster
					if inputkeys[key] || inputkeys[spotKey] {
						productTerms := &AWSProductTerms{
							Sku:     product.Sku,
							Memory:  product.Attributes.Memory,
							Storage: product.Attributes.Storage,
							VCpu:    product.Attributes.VCpu,
							GPU:     product.Attributes.GPU,
						}
						aws.Pricing[key] = productTerms
						aws.Pricing[spotKey] = productTerms
						skuToPricingKeyMap[product.Sku] = key
					}
					aws.ValidPricingKeys[key] = true
					aws.ValidPricingKeys[spotKey] = true
				} else if strings.Contains(product.Attributes.UsageType, "EBS:Volume") {
					// Parse EBS volume pricing (storage)
					// UsageTypes may be prefixed with a region code - strip it for generic lookups
					usageTypeMatch := usageTypeRegx.FindStringSubmatch(product.Attributes.UsageType)
					usageTypeNoRegion := usageTypeMatch[len(usageTypeMatch)-1]
					key := product.Attributes.RegionCode + "," + usageTypeNoRegion
					spotKey := key + ",preemptible"
					pv := &models.PV{
						Class:  volTypes[usageTypeNoRegion],
						Region: product.Attributes.RegionCode,
					}
					productTerms := &AWSProductTerms{
						Sku: product.Sku,
						PV:  pv,
					}
					aws.Pricing[key] = productTerms
					aws.Pricing[spotKey] = productTerms
					skuToPricingKeyMap[product.Sku] = key
					aws.ValidPricingKeys[key] = true
					aws.ValidPricingKeys[spotKey] = true
				} else if strings.Contains(product.Attributes.UsageType, "LoadBalancerUsage") && product.Attributes.Operation == "LoadBalancing:Network" {
					// Parse Network Load Balancer pricing
					// Note: Only NLBs are tracked since costmodel uses LoadBalancer services,
					// not ingresses controlled by AWS load balancer controller
					productTerms := &AWSProductTerms{
						Sku:          product.Sku,
						LoadBalancer: &models.LoadBalancer{},
					}
					key := product.Attributes.RegionCode + ",LoadBalancerUsage"
					aws.Pricing[key] = productTerms
					skuToPricingKeyMap[product.Sku] = key
					aws.ValidPricingKeys[key] = true
				}
			}
		}

		// Parse "terms" section: Extract on-demand pricing for each SKU
		if token == "terms" {
			_, err := dec.Token() // opening "{"
			if err != nil {
				return err
			}
			termType, err := dec.Token()
			if err != nil {
				return err
			}
			if termType == "OnDemand" {
				_, err := dec.Token() // opening "{"
				if err != nil {
					return err
				}
				for dec.More() {
					sku, err := dec.Token()
					if err != nil {
						return err
					}
					skuStr, ok := sku.(string)
					if !ok {
						return fmt.Errorf("failed to parse %s pricing from %s: expected SKU to be a string, got %T", termType, resp.Request.URL.String(), sku)
					}
					_, err = dec.Token() // opening "{"
					if err != nil {
						return err
					}
					_, err = dec.Token() // SKU.OfferTermCode key
					if err != nil {
						return err
					}
					offerTerm := &AWSOfferTerm{}
					err = dec.Decode(&offerTerm)
					if err != nil {
						log.Errorf("Error decoding AWS Offer Term for SKU %s: %v", skuStr, err)
					}

					key, ok := skuToPricingKeyMap[skuStr]
					if ok {
						spotKey := key + ",preemptible"
						aws.Pricing[key].OnDemand = offerTerm
						if _, ok := aws.Pricing[spotKey]; ok {
							aws.Pricing[spotKey].OnDemand = offerTerm
						}

						// Extract hourly cost from price dimensions
						// Price dimension key format: <SKU>.<OfferTermCode>.<RateCode>
						var cost string
						if _, isMatch := OnDemandRateCodes[offerTerm.OfferTermCode]; isMatch {
							// USD pricing path
							priceDimensionKey := strings.Join([]string{skuStr, offerTerm.OfferTermCode, HourlyRateCode}, ".")
							dimension, ok := offerTerm.PriceDimensions[priceDimensionKey]
							if ok {
								// Expected dimension found - use it directly
								cost = dimension.PricePerUnit.USD
							} else {
								// Expected dimension missing - fallback. If there is only one
								// dimension, use it even if the key doesn't match exactly
								dimensionCount := len(offerTerm.PriceDimensions)
								if dimensionCount == 1 {
									for dimensionKey, backupDimension := range offerTerm.PriceDimensions {
										cost = backupDimension.PricePerUnit.USD
										log.DedupedWarningf(5, "using:%v for a price dimension instead of missing dimension: %s", offerTerm.PriceDimensions[dimensionKey], priceDimensionKey)
										break
									}
								} else if dimensionCount == 0 {
									log.DedupedWarningf(5, "populatePricing: no pricing dimension available for: %s.", priceDimensionKey)
								} else {
									log.DedupedWarningf(5, "populatePricing: no assumable pricing dimension available for: %s.", priceDimensionKey)
								}
							}
						} else if _, isMatch := OnDemandRateCodesCn[offerTerm.OfferTermCode]; isMatch {
							// CNY pricing path (China regions)
							priceDimensionKey := strings.Join([]string{skuStr, offerTerm.OfferTermCode, HourlyRateCodeCn}, ".")
							dimension, ok := offerTerm.PriceDimensions[priceDimensionKey]
							if ok {
								cost = dimension.PricePerUnit.CNY
							} else {
								dimensionCount := len(offerTerm.PriceDimensions)
								if dimensionCount == 1 {
									for dimensionKey, backupDimension := range offerTerm.PriceDimensions {
										cost = backupDimension.PricePerUnit.CNY
										log.DedupedWarningf(5, "using:%v for a price dimension instead of missing dimension: %s", offerTerm.PriceDimensions[dimensionKey], priceDimensionKey)
										break
									}
								} else if dimensionCount == 0 {
									log.DedupedWarningf(5, "populatePricing: no pricing dimension available for: %s.", priceDimensionKey)
								} else {
									log.DedupedWarningf(5, "populatePricing: no assumable pricing dimension available for: %s.", priceDimensionKey)
								}
							}
						}
						// Apply cost to the appropriate resource type
						if strings.Contains(key, "EBS:VolumeP-IOPS.piops") {
							// If the specific UsageType is the per IO cost used on io1 volumes
							// we need to add the per IO cost to the io1 PV cost

							// Add the per IO cost to the PV object for the io1 volume type
							aws.Pricing[key].PV.CostPerIO = cost
						} else if strings.Contains(key, "EBS:Volume") {
							// EBS volumes: convert monthly cost to hourly (730 hours/month)
							costFloat, err := strconv.ParseFloat(cost, 64)
							if err != nil {
								log.Debugf("Error parsing EBS volume cost for %s: %v", key, err)
								// Preserve prior behavior: always leave a valid numeric
								// string so downstream ParseFloat (e.g. findCostForDisk)
								// doesn't fail on an empty value.
								aws.Pricing[key].PV.Cost = "0"
							} else {
								hourlyPrice := costFloat / timeutil.HoursPerMonth
								aws.Pricing[key].PV.Cost = strconv.FormatFloat(hourlyPrice, 'f', -1, 64)
							}
						} else if strings.Contains(key, "LoadBalancerUsage") {
							// On an unparseable cost, rely on the default rather than
							// discarding all pricing (mirrors the EBS handling above).
							costFloat, err := strconv.ParseFloat(cost, 64)
							if err != nil {
								log.Debugf("Error parsing load balancer cost for %s: %v", key, err)
							} else {
								aws.Pricing[key].LoadBalancer.Cost = costFloat
							}
						}
					}

					_, err = dec.Token() // closing "}"
					if err != nil {
						return err
					}
				}
				_, err = dec.Token() // closing "}"
				if err != nil {
					return err
				}
			}
		}
	}
	return nil
}

func (aws *AWS) refreshSpotPricing(force bool) {
	aws.SpotPricingLock.Lock()
	defer aws.SpotPricingLock.Unlock()

	now := time.Now().UTC()
	updateTime := now.Add(-SpotRefreshDuration)

	// Return if there was an update time set and an hour hasn't elapsed
	if !force && aws.SpotPricingUpdatedAt != nil && aws.SpotPricingUpdatedAt.After(updateTime) {
		return
	}

	sp, err := aws.parseSpotData(aws.SpotDataBucket, aws.SpotDataPrefix, aws.ProjectID, aws.SpotDataRegion)
	if err != nil {
		log.Warnf("Skipping AWS spot data download: %s", err.Error())
		aws.SpotPricingError = err
		return
	}
	aws.SpotPricingError = nil

	// update time last updated
	aws.SpotPricingUpdatedAt = &now
	aws.SpotPricingByInstanceID = sp
}

func (aws *AWS) initializeSpotPriceHistoryCache() (*SpotPriceHistoryCache, error) {
	log.Info("Initializing AWS Spot Price History Manager")

	// Get AWS access key for creating config
	accessKey, err := aws.GetAWSAccessKey()
	if err != nil {
		return nil, fmt.Errorf("getting AWS access key for spot price history: %w", err)
	}

	// Use the cluster region to create the initial AWS config and credentials.
	// The SpotPriceHistoryFetcher itself can query multiple regions by creating
	// region-specific EC2 clients as needed.
	if aws.ClusterRegion == "" {
		return nil, fmt.Errorf("no cluster region configured")
	}

	// Create config for the cluster region
	awsConfig, err := accessKey.CreateConfig(aws.ClusterRegion)
	if err != nil {
		return nil, fmt.Errorf("creating AWS config for spot price history: %w", err)
	}

	return NewSpotPriceHistoryCache(NewAWSSpotPriceHistoryFetcher(awsConfig)), nil
}

func (aws *AWS) spotPricingFromHistory(k models.Key) (*SpotPriceHistoryEntry, bool) {
	if aws.SpotPriceHistoryCache == nil {
		return nil, false
	}

	// Extract region, instance type, and availability zone from the key
	awsKey, ok := k.(*awsKey)
	if !ok {
		log.DedupedWarningf(10, "Failed to cast key to awsKey for spot price history lookup: %s", k.ID())
		return nil, false
	}

	region, regionOk := util.GetRegion(awsKey.Labels)
	instanceType, instanceTypeOk := util.GetInstanceType(awsKey.Labels)
	availabilityZone, availabilityZoneOk := util.GetZone(awsKey.Labels)
	// Skip lookup if any required information is missing
	if !regionOk || !instanceTypeOk || !availabilityZoneOk {
		log.DedupedWarningf(10, "Missing required info for spot price history lookup (region: %s, instanceType: %s, zone: %s): %s", region, instanceType, availabilityZone, k.ID())
		return nil, false
	}

	price, err := aws.SpotPriceHistoryCache.GetSpotPrice(region, instanceType, availabilityZone)
	if err != nil {
		log.Debugf("Failed to get spot price history for instance %s: %s", k.ID(), err.Error())
		return nil, false
	}
	return price, true
}

// Stubbed NetworkPricing for AWS. Pull directly from aws.json for now
func (aws *AWS) NetworkPricing() (*models.Network, error) {
	cpricing, err := aws.Config.GetCustomPricingData()
	if err != nil {
		return nil, err
	}
	znec, err := strconv.ParseFloat(cpricing.ZoneNetworkEgress, 64)
	if err != nil {
		return nil, err
	}
	rnec, err := strconv.ParseFloat(cpricing.RegionNetworkEgress, 64)
	if err != nil {
		return nil, err
	}
	inec, err := strconv.ParseFloat(cpricing.InternetNetworkEgress, 64)
	if err != nil {
		return nil, err
	}
	nge, err := strconv.ParseFloat(cpricing.NatGatewayEgress, 64)
	if err != nil {
		return nil, err
	}
	ngi, err := strconv.ParseFloat(cpricing.NatGatewayIngress, 64)
	if err != nil {
		return nil, err
	}

	return &models.Network{
		ZoneNetworkEgressCost:     znec,
		RegionNetworkEgressCost:   rnec,
		InternetNetworkEgressCost: inec,
		NatGatewayEgressCost:      nge,
		NatGatewayIngressCost:     ngi,
	}, nil
}

func (aws *AWS) LoadBalancerPricing() (*models.LoadBalancer, error) {
	// TODO: determine key based on function arguments
	// this is something that should be changed in the Provider interface

	key := aws.ClusterRegion + ",LoadBalancerUsage"

	// set default price
	hourlyCost := 0.025
	// use price index when available
	if terms, ok := aws.Pricing[key]; ok {
		hourlyCost = terms.LoadBalancer.Cost
	}

	return &models.LoadBalancer{
		Cost: hourlyCost,
	}, nil
}

// AllNodePricing returns all the billing data fetched.
func (aws *AWS) AllNodePricing() (interface{}, error) {
	aws.DownloadPricingDataLock.RLock()
	defer aws.DownloadPricingDataLock.RUnlock()
	return aws.Pricing, nil
}

func (aws *AWS) spotPricing(instanceID string) (*spotInfo, bool) {
	aws.SpotPricingLock.RLock()
	defer aws.SpotPricingLock.RUnlock()

	info, ok := aws.SpotPricingByInstanceID[instanceID]
	return info, ok
}

func (aws *AWS) reservedInstancePricing(instanceID string) (*RIData, bool) {
	aws.RIDataLock.RLock()
	defer aws.RIDataLock.RUnlock()

	data, ok := aws.RIPricingByInstanceID[instanceID]
	return data, ok
}

func (aws *AWS) savingsPlanPricing(instanceID string) (*SavingsPlanData, bool) {
	aws.SavingsPlanDataLock.RLock()
	defer aws.SavingsPlanDataLock.RUnlock()

	data, ok := aws.SavingsPlanDataByInstanceID[instanceID]
	return data, ok
}

func (aws *AWS) createNode(terms *AWSProductTerms, usageType string, k models.Key) (*models.Node, models.PricingMetadata, error) {
	key := k.Features()

	meta := models.PricingMetadata{}
	var cost string
	publicPricingFound := true
	c, ok := terms.OnDemand.PriceDimensions[strings.Join([]string{terms.Sku, terms.OnDemand.OfferTermCode, HourlyRateCode}, ".")]
	if ok {
		cost = c.PricePerUnit.USD
	} else {
		// Check for Chinese pricing
		c, ok = terms.OnDemand.PriceDimensions[strings.Join([]string{terms.Sku, terms.OnDemand.OfferTermCode, HourlyRateCodeCn}, ".")]
		if ok {
			cost = c.PricePerUnit.CNY
		} else {
			publicPricingFound = false
		}
	}

	if spotInfo, ok := aws.spotPricing(k.ID()); ok {
		var spotcost string
		log.DedupedInfof(5, "Looking up spot data from feed for node %s", k.ID())
		arr := strings.Split(spotInfo.Charge, " ")
		if len(arr) == 2 {
			spotcost = arr[0]
		} else {
			log.Infof("Spot data for node %s is missing", k.ID())
		}
		return &models.Node{
			Cost:         spotcost,
			VCPU:         terms.VCpu,
			RAM:          terms.Memory,
			GPU:          terms.GPU,
			Storage:      terms.Storage,
			BaseCPUPrice: aws.BaseCPUPrice,
			BaseRAMPrice: aws.BaseRAMPrice,
			BaseGPUPrice: aws.BaseGPUPrice,
			UsageType:    PreemptibleType,
		}, meta, nil
	} else if aws.isPreemptible(key) { // Preemptible but we don't have any data in the pricing report.
		log.Debugf("Node %s marked preemptible but no spot feed data available; falling back to other pricing sources", k.ID())

		// Try to get spot pricing from DescribeSpotPriceHistory API
		if historyEntry, ok := aws.spotPricingFromHistory(k); ok {
			log.DedupedInfof(5, "Using spot price history data for node %s: $%f", k.ID(), historyEntry.SpotPrice)
			spotHistoryCost := fmt.Sprintf("%f", historyEntry.SpotPrice)
			meta.Source = SpotPriceHistorySource
			return &models.Node{
				Cost:         spotHistoryCost,
				VCPU:         terms.VCpu,
				RAM:          terms.Memory,
				GPU:          terms.GPU,
				Storage:      terms.Storage,
				BaseCPUPrice: aws.BaseCPUPrice,
				BaseRAMPrice: aws.BaseRAMPrice,
				BaseGPUPrice: aws.BaseGPUPrice,
				UsageType:    PreemptibleType,
			}, meta, nil
		}

		if publicPricingFound {
			// return public price if found
			log.Debugf("No spot price history available for %s, falling back to on-demand pricing", k.ID())
			return &models.Node{
				Cost:         cost,
				VCPU:         terms.VCpu,
				RAM:          terms.Memory,
				GPU:          terms.GPU,
				Storage:      terms.Storage,
				BaseCPUPrice: aws.BaseCPUPrice,
				BaseRAMPrice: aws.BaseRAMPrice,
				BaseGPUPrice: aws.BaseGPUPrice,
				UsageType:    PreemptibleType,
			}, meta, nil
		} else {
			// return defaults if public pricing not found
			log.DedupedWarningf(5, "Could not find Node %s's public pricing info, using default configured spot prices instead", k.ID())
			return &models.Node{
				VCPU:         terms.VCpu,
				VCPUCost:     aws.BaseSpotCPUPrice,
				RAMCost:      aws.BaseSpotRAMPrice,
				RAM:          terms.Memory,
				GPU:          terms.GPU,
				Storage:      terms.Storage,
				BaseCPUPrice: aws.BaseCPUPrice,
				BaseRAMPrice: aws.BaseRAMPrice,
				BaseGPUPrice: aws.BaseGPUPrice,
				UsageType:    PreemptibleType,
			}, meta, nil
		}
	} else if sp, ok := aws.savingsPlanPricing(k.ID()); ok {
		strCost := fmt.Sprintf("%f", sp.EffectiveCost)
		return &models.Node{
			Cost:         strCost,
			VCPU:         terms.VCpu,
			RAM:          terms.Memory,
			GPU:          terms.GPU,
			Storage:      terms.Storage,
			BaseCPUPrice: aws.BaseCPUPrice,
			BaseRAMPrice: aws.BaseRAMPrice,
			BaseGPUPrice: aws.BaseGPUPrice,
			UsageType:    usageType,
		}, meta, nil

	} else if ri, ok := aws.reservedInstancePricing(k.ID()); ok {
		strCost := fmt.Sprintf("%f", ri.EffectiveCost)
		return &models.Node{
			Cost:         strCost,
			VCPU:         terms.VCpu,
			RAM:          terms.Memory,
			GPU:          terms.GPU,
			Storage:      terms.Storage,
			BaseCPUPrice: aws.BaseCPUPrice,
			BaseRAMPrice: aws.BaseRAMPrice,
			BaseGPUPrice: aws.BaseGPUPrice,
			UsageType:    usageType,
		}, meta, nil

	}
	// Throw error if public price is not found
	if !publicPricingFound {
		return nil, meta, fmt.Errorf("for node \"%s\", cannot find the following key in OnDemand pricing data \"%s\"", k.ID(), k.Features())
	}

	return &models.Node{
		Cost:         cost,
		VCPU:         terms.VCpu,
		RAM:          terms.Memory,
		GPU:          terms.GPU,
		Storage:      terms.Storage,
		BaseCPUPrice: aws.BaseCPUPrice,
		BaseRAMPrice: aws.BaseRAMPrice,
		BaseGPUPrice: aws.BaseGPUPrice,
		UsageType:    usageType,
	}, meta, nil
}

func (aws *AWS) getFargatePod(awsKey *awsKey) (*clustercache.Pod, bool) {
	pods := aws.Clientset.GetAllPods()
	for _, pod := range pods {
		if pod.Spec.NodeName == awsKey.Name {
			return pod, true
		}
	}
	return nil, false
}

const (
	nodeOSLabel   = "kubernetes.io/os"
	nodeArchLabel = "kubernetes.io/arch"

	fargatePodCapacityAnnotation = "CapacityProvisioned"
)

// e.g. "0.25vCPU 0.5GB"
var fargatePodCapacityRegex = regexp.MustCompile("^([0-9.]+)vCPU ([0-9.]+)GB$")

func (aws *AWS) createFargateNode(awsKey *awsKey, usageType string) (*models.Node, models.PricingMetadata, error) {
	if aws.FargatePricing == nil {
		return nil, models.PricingMetadata{}, fmt.Errorf("fargate pricing not initialized")
	}
	pod, ok := aws.getFargatePod(awsKey)
	if !ok {
		return nil, models.PricingMetadata{}, fmt.Errorf("could not find pod for fargate node %s", awsKey.Name)
	}
	capacity := pod.Annotations[fargatePodCapacityAnnotation]
	match := fargatePodCapacityRegex.FindStringSubmatch(capacity)
	if len(match) == 0 {
		return nil, models.PricingMetadata{}, fmt.Errorf("could not parse pod capacity for fargate node %s", awsKey.Name)
	}

	vCPU, err := strconv.ParseFloat(match[1], 64)
	if err != nil {
		return nil, models.PricingMetadata{}, fmt.Errorf("could not parse vCPU capacity for fargate node %s: %v", awsKey.Name, err)
	}
	memory, err := strconv.ParseFloat(match[2], 64)
	if err != nil {
		return nil, models.PricingMetadata{}, fmt.Errorf("could not parse memory capacity for fargate node %s: %v", awsKey.Name, err)
	}

	region, ok := util.GetRegion(awsKey.Labels)
	if !ok {
		return nil, models.PricingMetadata{}, fmt.Errorf("could not get region for fargate node %s", awsKey.Name)
	}
	nodeOS := awsKey.Labels[nodeOSLabel]
	nodeArch := awsKey.Labels[nodeArchLabel]
	hourlyCPU, hourlyRAM, err := aws.FargatePricing.GetHourlyPricing(region, nodeOS, nodeArch)
	if err != nil {
		return nil, models.PricingMetadata{}, fmt.Errorf("could not get hourly pricing for fargate node %s: %v", awsKey.Name, err)
	}

	cost := hourlyCPU*vCPU + hourlyRAM*memory
	return &models.Node{
		Cost:         strconv.FormatFloat(cost, 'f', -1, 64),
		VCPU:         strconv.FormatFloat(vCPU, 'f', -1, 64),
		RAM:          strconv.FormatFloat(memory, 'f', -1, 64),
		RAMBytes:     strconv.FormatFloat(memory*1024*1024*1024, 'f', -1, 64),
		VCPUCost:     strconv.FormatFloat(hourlyCPU, 'f', -1, 64),
		RAMCost:      strconv.FormatFloat(hourlyRAM, 'f', -1, 64),
		BaseCPUPrice: aws.BaseCPUPrice,
		BaseRAMPrice: aws.BaseRAMPrice,
		BaseGPUPrice: aws.BaseGPUPrice,
		UsageType:    usageType,
	}, models.PricingMetadata{}, nil
}

// NodePricing takes in a key from GetKey and returns a Node object for use in building the cost model.
func (aws *AWS) NodePricing(k models.Key) (*models.Node, models.PricingMetadata, error) {
	aws.DownloadPricingDataLock.RLock()
	defer aws.DownloadPricingDataLock.RUnlock()

	key := k.Features()
	usageType := "ondemand"
	if aws.isPreemptible(key) {
		usageType = PreemptibleType
	}

	meta := models.PricingMetadata{}

	terms, ok := aws.Pricing[key]
	if termsStr, err := json.Marshal(terms); err == nil {
		log.Debugf("NodePricing: for key \"%s\" found the following OnDemand data: %s", key, string(termsStr))
	}
	if ok {
		return aws.createNode(terms, usageType, k)
	} else if _, ok := aws.ValidPricingKeys[key]; ok {
		aws.DownloadPricingDataLock.RUnlock()
		err := aws.DownloadPricingData()
		aws.DownloadPricingDataLock.RLock()
		if err != nil {
			return &models.Node{
				Cost:             aws.BaseCPUPrice,
				BaseCPUPrice:     aws.BaseCPUPrice,
				BaseRAMPrice:     aws.BaseRAMPrice,
				BaseGPUPrice:     aws.BaseGPUPrice,
				UsageType:        usageType,
				UsesBaseCPUPrice: true,
			}, meta, err
		}
		terms, termsOk := aws.Pricing[key]
		if !termsOk {
			return &models.Node{
				Cost:             aws.BaseCPUPrice,
				BaseCPUPrice:     aws.BaseCPUPrice,
				BaseRAMPrice:     aws.BaseRAMPrice,
				BaseGPUPrice:     aws.BaseGPUPrice,
				UsageType:        usageType,
				UsesBaseCPUPrice: true,
			}, meta, fmt.Errorf("Unable to find any Pricing data for \"%s\"", key)
		}
		return aws.createNode(terms, usageType, k)
	} else if awsKey, ok := k.(*awsKey); ok && awsKey.isFargateNode() {
		// Since Fargate pricing is listed at AmazonECS and is different from AmazonEC2, we handle it separately here
		return aws.createFargateNode(awsKey, usageType)
	} else { // Fall back to base pricing if we can't find the key. Base pricing is handled at the costmodel level.
		// we seem to have an issue where this error gets thrown during app start.
		// somehow the ValidPricingKeys map is being accessed before all the pricing data has been downloaded
		return nil, meta, fmt.Errorf("Invalid Pricing Key \"%s\"", key)
	}
}

// ClusterInfo returns an object that represents the cluster. TODO: actually return the name of the cluster. Blocked on cluster federation.
func (awsProvider *AWS) ClusterInfo() (map[string]string, error) {
	c, err := awsProvider.GetConfig()
	if err != nil {
		return nil, err
	}

	const defaultClusterName = "AWS Cluster #1"
	// Determine cluster name
	clusterName := c.ClusterName
	if clusterName == "" {
		if clusterName = env.GetAWSClusterID(); clusterName != "" {
			log.DedupedWarningf(3, "%s will be deprecated in a future release. Use %s instead", env.AWSClusterIDEnvVar, coreenv.ClusterIDEnvVar)
		} else if clusterName = coreenv.GetClusterID(); clusterName != "" {
			log.DedupedDebugf(3, "Setting cluster name to %s from %s", clusterName, coreenv.ClusterIDEnvVar)
		} else {
			clusterName = defaultClusterName
			log.DedupedWarningf(3, "Unable to detect cluster name - using default of %s. Set it through the configmap or the %s env var", defaultClusterName, coreenv.ClusterIDEnvVar)
		}
	}

	// this value requires configuration but is unavailable else where
	clusterAccountID := c.ClusterAccountID
	// Use AthenaProjectID if Cluster Account is not set to support older configs
	if clusterAccountID == "" {
		clusterAccountID = c.AthenaProjectID
	}

	m := make(map[string]string)
	m["name"] = clusterName
	m["provider"] = opencost.AWSProvider
	m["account"] = clusterAccountID
	m["region"] = awsProvider.ClusterRegion
	m["id"] = coreenv.GetClusterID()
	m["remoteReadEnabled"] = strconv.FormatBool(env.IsRemoteEnabled())
	m["provisioner"] = awsProvider.clusterProvisioner
	return m, nil
}

// updates the authentication to the latest values (via config or secret)
func (aws *AWS) ConfigureAuth() error {
	c, err := aws.Config.GetCustomPricingData()
	if err != nil {
		log.Errorf("Error downloading default pricing data: %s", err.Error())
	}
	return aws.ConfigureAuthWith(c)
}

// updates the authentication to the latest values (via config or secret)
func (aws *AWS) ConfigureAuthWith(config *models.CustomPricing) error {
	accessKeyID, accessKeySecret := aws.getAWSAuth(false, config)
	if accessKeyID != "" && accessKeySecret != "" { // credentials may exist on the actual AWS node-- if so, use those. If not, override with the service key
		err := coreenv.Set(env.AWSAccessKeyIDEnvVar, accessKeyID)
		if err != nil {
			return err
		}
		err = coreenv.Set(env.AWSAccessKeySecretEnvVar, accessKeySecret)
		if err != nil {
			return err
		}
	}
	return nil
}

// Gets the aws key id and secret
func (aws *AWS) getAWSAuth(forceReload bool, cp *models.CustomPricing) (string, string) {
	// 1. Check config values first (set from frontend UI)
	if cp.AwsServiceKeyName != "" && cp.AwsServiceKeySecret != "" {
		aws.ServiceAccountChecks.Set("hasKey", &models.ServiceAccountCheck{
			Message: "AWS ServiceKey exists",
			Status:  true,
		})
		return cp.AwsServiceKeyName, cp.AwsServiceKeySecret
	}

	// 2. Check for secret
	s, _ := aws.loadAWSAuthSecret(forceReload)
	if s != nil && s.AccessKeyID != "" && s.SecretAccessKey != "" {
		aws.ServiceAccountChecks.Set("hasKey", &models.ServiceAccountCheck{
			Message: "AWS ServiceKey exists",
			Status:  true,
		})
		return s.AccessKeyID, s.SecretAccessKey
	}

	// 3. Fall back to env vars
	if env.GetAWSAccessKeyID() == "" || env.GetAWSAccessKeySecret() == "" {
		aws.ServiceAccountChecks.Set("hasKey", &models.ServiceAccountCheck{
			Message: "AWS ServiceKey exists",
			Status:  false,
		})
	} else {
		aws.ServiceAccountChecks.Set("hasKey", &models.ServiceAccountCheck{
			Message: "AWS ServiceKey exists",
			Status:  true,
		})
	}
	return env.GetAWSAccessKeyID(), env.GetAWSAccessKeySecret()
}

// Load once and cache the result (even on failure). This is an install time secret, so
// we don't expect the secret to change. If it does, however, we can force reload using
// the input parameter.
func (aws *AWS) loadAWSAuthSecret(force bool) (*AWSAccessKey, error) {
	if !force && loadedAWSSecret {
		return awsSecret, nil
	}
	loadedAWSSecret = true

	exists, err := fileutil.FileExists(models.AuthSecretPath)
	if !exists || err != nil {
		return nil, fmt.Errorf("Failed to locate service account file: %s", models.AuthSecretPath)
	}

	result, err := os.ReadFile(models.AuthSecretPath)
	if err != nil {
		return nil, err
	}

	var ak AWSAccessKey
	err = json.Unmarshal(result, &ak)
	if err != nil {
		return nil, err
	}

	awsSecret = &ak
	return awsSecret, nil
}

func (aws *AWS) getAddressesForRegion(ctx context.Context, region string) (*ec2.DescribeAddressesOutput, error) {
	aak, err := aws.GetAWSAccessKey()
	if err != nil {
		return nil, err
	}
	cfg, err := aak.CreateConfig(region)
	if err != nil {
		return nil, err
	}

	cli := ec2.NewFromConfig(cfg)
	return cli.DescribeAddresses(ctx, &ec2.DescribeAddressesInput{})
}

func (aws *AWS) getAllAddresses() ([]*ec2Types.Address, error) {
	aws.ConfigureAuth() // load authentication data into env vars

	regions := aws.Regions()

	addressCh := make(chan *ec2.DescribeAddressesOutput, len(regions))
	errorCh := make(chan error, len(regions))

	var wg sync.WaitGroup
	wg.Add(len(regions))

	// Get volumes from each AWS region
	for _, r := range regions {
		region := r // make a copy of r to avoid capturing loop variable
		// Fetch IP address response and send results and errors to their
		// respective channels
		go func() {
			defer wg.Done()
			defer errs.HandlePanic()

			// Query for first page of volume results
			resp, err := aws.getAddressesForRegion(context.TODO(), region)
			if err != nil {
				var awsErr smithy.APIError
				if errors.As(err, &awsErr) {
					switch awsErr.ErrorCode() {
					case "AuthFailure", "InvalidClientTokenId", "UnauthorizedOperation":
						log.DedupedInfof(5, "Unable to get addresses for region %s due to AWS permissions, error message: %s", region, awsErr.ErrorMessage())
						return
					default:
						errorCh <- err
						return
					}
				} else {
					errorCh <- err
					return
				}
			}
			addressCh <- resp
		}()
	}

	// Close the result channels after everything has been sent
	go func() {
		defer errs.HandlePanic()

		wg.Wait()
		close(errorCh)
		close(addressCh)
	}()

	var addresses []*ec2Types.Address
	for adds := range addressCh {
		for _, add := range adds.Addresses {
			a := add // duplicate to avoid pointer to iterator
			addresses = append(addresses, &a)
		}
	}

	var errs []error
	for err := range errorCh {
		log.DedupedWarningf(5, "unable to get addresses: %s", err)
		errs = append(errs, err)
	}

	// Return error if no addresses are returned
	if len(errs) > 0 && len(addresses) == 0 {
		return nil, fmt.Errorf("%d error(s) retrieving addresses: %v", len(errs), errs)
	}

	return addresses, nil
}

// GetAddresses retrieves EC2 addresses
func (aws *AWS) GetAddresses() ([]byte, error) {
	addresses, err := aws.getAllAddresses()
	if err != nil {
		return nil, err
	}

	// Format the response this way to match the JSON-encoded formatting of a single response
	// from DescribeAddresss, so that consumers can always expect AWS disk responses to have
	// a "Addresss" key at the top level.
	return json.Marshal(map[string][]*ec2Types.Address{
		"Addresses": addresses,
	})
}

func (aws *AWS) isAddressOrphaned(address *ec2Types.Address) bool {
	if address.AssociationId != nil {
		return false
	}

	return true
}

func (aws *AWS) getDisksForRegion(ctx context.Context, region string, maxResults int32, nextToken *string) (*ec2.DescribeVolumesOutput, error) {
	aak, err := aws.GetAWSAccessKey()
	if err != nil {
		return nil, err
	}

	cfg, err := aak.CreateConfig(region)
	if err != nil {
		return nil, err
	}

	cli := ec2.NewFromConfig(cfg)
	return cli.DescribeVolumes(ctx, &ec2.DescribeVolumesInput{
		MaxResults: &maxResults,
		NextToken:  nextToken,
	})
}

func (aws *AWS) getAllDisks() ([]*ec2Types.Volume, error) {
	aws.ConfigureAuth() // load authentication data into env vars

	regions := aws.Regions()

	volumeCh := make(chan *ec2.DescribeVolumesOutput, len(regions))
	errorCh := make(chan error, len(regions))

	var wg sync.WaitGroup
	wg.Add(len(regions))

	// Get volumes from each AWS region
	for _, r := range regions {
		// Fetch volume response and send results and errors to their
		// respective channels
		go func(region string) {
			defer wg.Done()
			defer errs.HandlePanic()

			// Query for first page of volume results
			resp, err := aws.getDisksForRegion(context.TODO(), region, 1000, nil)
			if err != nil {
				var awsErr smithy.APIError
				if errors.As(err, &awsErr) {
					switch awsErr.ErrorCode() {
					case "AuthFailure", "InvalidClientTokenId", "UnauthorizedOperation":
						log.DedupedInfof(5, "Unable to get disks for region %s due to AWS permissions, error message: %s", region, awsErr.ErrorMessage())
						return
					default:
						errorCh <- err
						return
					}
				} else {
					errorCh <- err
					return
				}
			}
			volumeCh <- resp

			// A NextToken indicates more pages of results. Keep querying
			// until all pages are retrieved.
			for resp.NextToken != nil {
				resp, err = aws.getDisksForRegion(context.TODO(), region, 100, resp.NextToken)
				if err != nil {
					errorCh <- err
					return
				}
				volumeCh <- resp
			}
		}(r)
	}

	// Close the result channels after everything has been sent
	go func() {
		defer errs.HandlePanic()

		wg.Wait()
		close(errorCh)
		close(volumeCh)
	}()

	var volumes []*ec2Types.Volume
	for vols := range volumeCh {
		for _, vol := range vols.Volumes {
			v := vol // duplicate to avoid pointer to iterator
			volumes = append(volumes, &v)
		}
	}

	var errs []error
	for err := range errorCh {
		log.DedupedWarningf(5, "unable to get disks: %s", err)
		errs = append(errs, err)
	}

	// Return error if no volumes are returned
	if len(errs) > 0 && len(volumes) == 0 {
		return nil, fmt.Errorf("%d error(s) retrieving volumes: %v", len(errs), errs)
	}

	return volumes, nil
}

// GetDisks returns the AWS disks backing PVs. Useful because sometimes k8s will not clean up PVs correctly. Requires a json config in /var/configs with key region.
func (aws *AWS) GetDisks() ([]byte, error) {
	volumes, err := aws.getAllDisks()
	if err != nil {
		return nil, err
	}

	// Format the response this way to match the JSON-encoded formatting of a single response
	// from DescribeVolumes, so that consumers can always expect AWS disk responses to have
	// a "Volumes" key at the top level.
	return json.Marshal(map[string][]*ec2Types.Volume{
		"Volumes": volumes,
	})
}

func (aws *AWS) isDiskOrphaned(vol *ec2Types.Volume) bool {
	// Do not consider volume orphaned if in use
	if vol.State == InUseState {
		return false
	}

	// Do not consider volume orphaned if volume is attached to any attachments
	if len(vol.Attachments) != 0 {
		for _, attachment := range vol.Attachments {
			if attachment.State == AttachedState {
				return false
			}
		}
	}

	return true
}

func (aws *AWS) GetOrphanedResources() ([]models.OrphanedResource, error) {
	volumes, volumesErr := aws.getAllDisks()
	addresses, addressesErr := aws.getAllAddresses()

	// If we have any orphaned resources - prioritize returning them over returning errors
	if len(addresses) == 0 && len(volumes) == 0 {
		if volumesErr != nil {
			return nil, volumesErr
		}
		if addressesErr != nil {
			return nil, addressesErr
		}
	}

	var orphanedResources []models.OrphanedResource

	for _, volume := range volumes {
		if aws.isDiskOrphaned(volume) {
			cost, err := aws.findCostForDisk(volume)
			if err != nil {
				return nil, err
			}

			var volumeSize int64
			if volume.Size != nil {
				volumeSize = int64(*volume.Size)
			}

			// This is turning us-east-1a into us-east-1
			var zone string
			if volume.AvailabilityZone != nil {
				zone = *volume.AvailabilityZone
			}
			var region, url string
			region = parseRegionFromAZ(zone)
			if region != "" {
				url = "https://console.aws.amazon.com/ec2/home?region=" + region + "#Volumes:sort=desc:createTime"
			} else {
				url = "https://console.aws.amazon.com/ec2/home?#Volumes:sort=desc:createTime"
			}

			// output tags as desc
			tags := map[string]string{}
			for _, tag := range volume.Tags {
				tags[*tag.Key] = *tag.Value
			}

			or := models.OrphanedResource{
				Kind:        "disk",
				Region:      zone,
				Size:        &volumeSize,
				DiskName:    *volume.VolumeId,
				Url:         url,
				MonthlyCost: cost,
				Description: tags,
			}

			orphanedResources = append(orphanedResources, or)
		}
	}

	for _, address := range addresses {
		if aws.isAddressOrphaned(address) {
			cost := AWSHourlyPublicIPCost * timeutil.HoursPerMonth

			desc := map[string]string{}
			for _, tag := range address.Tags {
				if tag.Key == nil {
					continue
				}
				if tag.Value == nil {
					desc[*tag.Key] = ""
				} else {
					desc[*tag.Key] = *tag.Value
				}
			}

			or := models.OrphanedResource{
				Kind:        "address",
				Address:     *address.PublicIp,
				Description: desc,
				Url:         "http://console.aws.amazon.com/ec2/home?#Addresses",
				MonthlyCost: &cost,
			}

			orphanedResources = append(orphanedResources, or)
		}
	}
	return orphanedResources, nil
}

func (aws *AWS) findCostForDisk(disk *ec2Types.Volume) (*float64, error) {
	if disk.AvailabilityZone == nil {
		return nil, fmt.Errorf("nil AvailabilityZone")
	}
	if disk.Size == nil {
		return nil, fmt.Errorf("nil disk size")
	}

	class := volTypes[string(disk.VolumeType)]

	region := parseRegionFromAZ(*disk.AvailabilityZone)

	key := region + "," + class
	_, ok := aws.Pricing[key]
	if region == "" || !ok {
		// Fallback to ClusterRegion
		key = aws.ClusterRegion + "," + class
	}

	pricing, ok := aws.Pricing[key]
	if !ok {
		return nil, fmt.Errorf("no pricing data for key '%s'", key)
	}
	if pricing == nil {
		return nil, fmt.Errorf("nil pricing data for key '%s'", key)
	}
	if pricing.PV == nil {
		return nil, fmt.Errorf("pricing for key '%s' has nil PV", key)
	}
	priceStr := pricing.PV.Cost

	price, err := strconv.ParseFloat(priceStr, 64)
	if err != nil {
		return nil, err
	}

	cost := price * timeutil.HoursPerMonth * float64(*disk.Size)
	return &cost, nil
}

// QueryAthenaPaginated executes athena query and processes results.
func (aws *AWS) QueryAthenaPaginated(ctx context.Context, query string, fn func(*athena.GetQueryResultsOutput) bool) error {
	awsAthenaInfo, err := aws.GetAWSAthenaInfo()
	if err != nil {
		return err
	}
	if awsAthenaInfo.AthenaDatabase == "" || awsAthenaInfo.AthenaTable == "" || awsAthenaInfo.AthenaRegion == "" ||
		awsAthenaInfo.AthenaBucketName == "" || awsAthenaInfo.AccountID == "" {
		return fmt.Errorf("QueryAthenaPaginated: athena configuration incomplete")
	}

	queryExecutionCtx := &athenaTypes.QueryExecutionContext{
		Database: awsSDK.String(awsAthenaInfo.AthenaDatabase),
	}

	if awsAthenaInfo.AthenaCatalog != "" {
		queryExecutionCtx.Catalog = awsSDK.String(awsAthenaInfo.AthenaCatalog)
	}

	resultConfiguration := &athenaTypes.ResultConfiguration{
		OutputLocation: awsSDK.String(awsAthenaInfo.AthenaBucketName),
	}
	startQueryExecutionInput := &athena.StartQueryExecutionInput{
		QueryString:           awsSDK.String(query),
		QueryExecutionContext: queryExecutionCtx,
		ResultConfiguration:   resultConfiguration,
	}

	// Only set if there is a value, the default input is nil which defaults to the 'primary' workgroup
	if awsAthenaInfo.AthenaWorkgroup != "" {
		startQueryExecutionInput.WorkGroup = awsSDK.String(awsAthenaInfo.AthenaWorkgroup)
	}

	// Create Athena Client
	cfg, err := awsAthenaInfo.CreateConfig()
	if err != nil {
		log.Errorf("Could not retrieve Athena Configuration: %s", err.Error())
	}
	cli := athena.NewFromConfig(cfg)

	// Query Athena
	startQueryExecutionOutput, err := cli.StartQueryExecution(ctx, startQueryExecutionInput)
	if err != nil {
		return fmt.Errorf("QueryAthenaPaginated: start query error: %s", err.Error())
	}
	err = waitForQueryToComplete(ctx, cli, startQueryExecutionOutput.QueryExecutionId)
	if err != nil {
		return fmt.Errorf("QueryAthenaPaginated: query execution error: %s", err.Error())
	}
	queryResultsInput := &athena.GetQueryResultsInput{
		QueryExecutionId: startQueryExecutionOutput.QueryExecutionId,
	}
	getQueryResultsPaginator := athena.NewGetQueryResultsPaginator(cli, queryResultsInput)
	for getQueryResultsPaginator.HasMorePages() {
		pg, err := getQueryResultsPaginator.NextPage(ctx)
		if err != nil {
			log.Errorf("QueryAthenaPaginated: NextPage error: %s", err.Error())
			continue
		}
		fn(pg)
	}
	return nil
}

type SavingsPlanData struct {
	ResourceID     string
	EffectiveCost  float64
	SavingsPlanARN string
	MostRecentDate string
}

func (aws *AWS) GetSavingsPlanDataFromAthena() error {
	cfg, err := aws.GetConfig()
	if err != nil {
		aws.RIPricingError = err
		return err
	}
	if cfg.AthenaBucketName == "" {
		err = ErrNoAthenaBucket
		aws.RIPricingError = err
		return err
	}
	if aws.SavingsPlanDataByInstanceID == nil {
		aws.SavingsPlanDataByInstanceID = make(map[string]*SavingsPlanData)
	}
	tNow := time.Now()
	tOneDayAgo := tNow.Add(time.Duration(-25) * time.Hour) // Also get files from one day ago to avoid boundary conditions
	start := tOneDayAgo.Format("2006-01-02")
	end := tNow.Format("2006-01-02")
	// Use Savings Plan Effective Rate as an estimation for cost, assuming the 1h most recent period got a fully loaded savings plan.
	//
	q := `SELECT
		line_item_usage_start_date,
		savings_plan_savings_plan_a_r_n,
		line_item_resource_id,
		savings_plan_savings_plan_rate
	FROM %s as cost_data
	WHERE line_item_usage_start_date BETWEEN date '%s' AND date '%s'
	AND line_item_line_item_type = 'SavingsPlanCoveredUsage' ORDER BY
	line_item_usage_start_date DESC`

	page := 0
	mostRecentDate := ""
	processResults := func(op *athena.GetQueryResultsOutput) bool {
		if op == nil {
			log.Errorf("GetSavingsPlanDataFromAthena: Athena page is nil")
			return false
		} else if op.ResultSet == nil {
			log.Errorf("GetSavingsPlanDataFromAthena: Athena page.ResultSet is nil")
			return false
		}
		aws.SavingsPlanDataLock.Lock()
		defer aws.SavingsPlanDataLock.Unlock()
		if page == 0 {
			aws.SavingsPlanDataByInstanceID = make(map[string]*SavingsPlanData) // Clean out the old data and only report a savingsplan price if its in the most recent run.
		}

		iter := op.ResultSet.Rows
		if page == 0 && len(iter) > 0 {
			iter = op.ResultSet.Rows[1:len(op.ResultSet.Rows)]
		}
		page++
		for _, r := range iter {
			d := *r.Data[0].VarCharValue
			if mostRecentDate == "" {
				mostRecentDate = d
			} else if mostRecentDate != d { // Get all most recent assignments
				break
			}
			cost, err := strconv.ParseFloat(*r.Data[3].VarCharValue, 64)
			if err != nil {
				log.Infof("Error converting `%s` from float ", *r.Data[3].VarCharValue)
			}
			r := &SavingsPlanData{
				ResourceID:     *r.Data[2].VarCharValue,
				EffectiveCost:  cost,
				SavingsPlanARN: *r.Data[1].VarCharValue,
				MostRecentDate: d,
			}
			aws.SavingsPlanDataByInstanceID[r.ResourceID] = r
		}
		log.Debugf("Found %d savings plan applied instances", len(aws.SavingsPlanDataByInstanceID))
		for k, r := range aws.SavingsPlanDataByInstanceID {
			log.DedupedInfof(5, "Savings Plan Instance Data found for node %s : %f at time %s", k, r.EffectiveCost, r.MostRecentDate)
		}
		return true
	}

	query := fmt.Sprintf(q, cfg.AthenaTable, start, end)

	log.Debugf("Running Query: %s", query)

	err = aws.QueryAthenaPaginated(context.TODO(), query, processResults)
	if err != nil {
		aws.RIPricingError = err
		return fmt.Errorf("Error fetching Savings Plan Data: %s", err)
	}

	return nil
}

type RIData struct {
	ResourceID     string
	EffectiveCost  float64
	ReservationARN string
	MostRecentDate string
}

func (aws *AWS) GetReservationDataFromAthena() error {
	cfg, err := aws.GetConfig()
	if err != nil {
		aws.RIPricingError = err
		return err
	}
	if cfg.AthenaBucketName == "" {
		err = ErrNoAthenaBucket
		aws.RIPricingError = err
		return err
	}

	// Query for all column names in advance in order to validate configured
	// label columns
	columns, _ := aws.fetchColumns()

	if !columns["reservation_reservation_a_r_n"] || !columns["reservation_effective_cost"] {
		err = fmt.Errorf("no reservation data available in Athena")
		aws.RIPricingError = err
		return err
	}
	if aws.RIPricingByInstanceID == nil {
		aws.RIPricingByInstanceID = make(map[string]*RIData)
	}
	tNow := time.Now()
	tOneDayAgo := tNow.Add(time.Duration(-25) * time.Hour) // Also get files from one day ago to avoid boundary conditions
	start := tOneDayAgo.Format("2006-01-02")
	end := tNow.Format("2006-01-02")
	q := `SELECT
		line_item_usage_start_date,
		reservation_reservation_a_r_n,
		line_item_resource_id,
		reservation_effective_cost
	FROM %s as cost_data
	WHERE line_item_usage_start_date BETWEEN date '%s' AND date '%s'
	AND reservation_reservation_a_r_n <> '' ORDER BY
	line_item_usage_start_date DESC`

	page := 0
	mostRecentDate := ""
	processResults := func(op *athena.GetQueryResultsOutput) bool {
		if op == nil {
			log.Errorf("GetReservationDataFromAthena: Athena page is nil")
			return false
		} else if op.ResultSet == nil {
			log.Errorf("GetReservationDataFromAthena: Athena page.ResultSet is nil")
			return false
		}
		aws.RIDataLock.Lock()
		defer aws.RIDataLock.Unlock()
		if page == 0 {
			aws.RIPricingByInstanceID = make(map[string]*RIData) // Clean out the old data and only report a RI price if its in the most recent run.
		}
		iter := op.ResultSet.Rows
		if page == 0 && len(iter) > 0 {
			iter = op.ResultSet.Rows[1:len(op.ResultSet.Rows)]
		}
		page++
		for _, r := range iter {
			d := *r.Data[0].VarCharValue
			if mostRecentDate == "" {
				mostRecentDate = d
			} else if mostRecentDate != d { // Get all most recent assignments
				break
			}
			cost, err := strconv.ParseFloat(*r.Data[3].VarCharValue, 64)
			if err != nil {
				log.Infof("Error converting `%s` from float ", *r.Data[3].VarCharValue)
			}
			r := &RIData{
				ResourceID:     *r.Data[2].VarCharValue,
				EffectiveCost:  cost,
				ReservationARN: *r.Data[1].VarCharValue,
				MostRecentDate: d,
			}
			aws.RIPricingByInstanceID[r.ResourceID] = r
		}
		log.Debugf("Found %d reserved instances", len(aws.RIPricingByInstanceID))
		for k, r := range aws.RIPricingByInstanceID {
			log.DedupedInfof(5, "Reserved Instance Data found for node %s : %f at time %s", k, r.EffectiveCost, r.MostRecentDate)
		}
		return true
	}

	query := fmt.Sprintf(q, cfg.AthenaTable, start, end)

	log.Debugf("Running Query: %s", query)

	err = aws.QueryAthenaPaginated(context.TODO(), query, processResults)
	if err != nil {
		aws.RIPricingError = err
		return fmt.Errorf("Error fetching Reserved Instance Data: %s", err)
	}
	aws.RIPricingError = nil
	return nil
}

// fetchColumns returns a list of the names of all columns in the configured
// Athena tables
func (aws *AWS) fetchColumns() (map[string]bool, error) {
	columnSet := map[string]bool{}

	awsAthenaInfo, err := aws.GetAWSAthenaInfo()
	if err != nil {
		return nil, err
	}

	// This Query is supported by Athena tables and views
	q := `SELECT column_name FROM information_schema.columns WHERE table_schema = '%s' AND table_name = '%s'`
	query := fmt.Sprintf(q, awsAthenaInfo.AthenaDatabase, awsAthenaInfo.AthenaTable)
	pageNum := 0
	athenaErr := aws.QueryAthenaPaginated(context.TODO(), query, func(page *athena.GetQueryResultsOutput) bool {
		if page == nil {
			log.Errorf("fetchColumns: Athena page is nil")
			return false
		} else if page.ResultSet == nil {
			log.Errorf("fetchColumns: Athena page.ResultSet is nil")
			return false
		}
		// remove header row 'column_name'
		rows := page.ResultSet.Rows[1:]
		for _, row := range rows {
			columnSet[*row.Data[0].VarCharValue] = true
		}
		pageNum++
		return true
	})

	if athenaErr != nil {
		return columnSet, athenaErr
	}

	if len(columnSet) == 0 {
		log.Infof("No columns retrieved from Athena")
	}

	return columnSet, nil
}

type spotInfo struct {
	Timestamp   string `csv:"Timestamp"`
	UsageType   string `csv:"UsageType"`
	Operation   string `csv:"Operation"`
	InstanceID  string `csv:"InstanceID"`
	MyBidID     string `csv:"MyBidID"`
	MyMaxPrice  string `csv:"MyMaxPrice"`
	MarketPrice string `csv:"MarketPrice"`
	Charge      string `csv:"Charge"`
	Version     string `csv:"Version"`
}

func (aws *AWS) parseSpotData(bucket string, prefix string, projectID string, region string) (map[string]*spotInfo, error) {
	aws.ConfigureAuth() // configure aws api authentication by setting env vars

	s3Prefix := projectID
	if len(prefix) != 0 {
		s3Prefix = prefix + "/" + s3Prefix
	}

	aak, err := aws.GetAWSAccessKey()
	if err != nil {
		return nil, err
	}

	cfg, err := aak.CreateConfig(region)
	if err != nil {
		return nil, err
	}
	cli := s3.NewFromConfig(cfg)
	downloader := manager.NewDownloader(cli)

	tNow := time.Now()
	tOneDayAgo := tNow.Add(time.Duration(-24) * time.Hour) // Also get files from one day ago to avoid boundary conditions
	ls := &s3.ListObjectsInput{
		Bucket: awsSDK.String(bucket),
		Prefix: awsSDK.String(s3Prefix + "." + tOneDayAgo.Format("2006-01-02")),
	}
	ls2 := &s3.ListObjectsInput{
		Bucket: awsSDK.String(bucket),
		Prefix: awsSDK.String(s3Prefix + "." + tNow.Format("2006-01-02")),
	}
	lso, err := cli.ListObjects(context.TODO(), ls)
	if err != nil {
		aws.ServiceAccountChecks.Set("bucketList", &models.ServiceAccountCheck{
			Message:        "Bucket List Permissions Available",
			Status:         false,
			AdditionalInfo: err.Error(),
		})
		return nil, err
	} else {
		aws.ServiceAccountChecks.Set("bucketList", &models.ServiceAccountCheck{
			Message: "Bucket List Permissions Available",
			Status:  true,
		})
	}
	lsoLen := len(lso.Contents)
	log.Debugf("Found %d spot data files from yesterday", lsoLen)
	if lsoLen == 0 {
		log.Debugf("ListObjects \"s3://%s/%s\" produced no keys", *ls.Bucket, *ls.Prefix)
	}
	lso2, err := cli.ListObjects(context.TODO(), ls2)
	if err != nil {
		return nil, err
	}
	lso2Len := len(lso2.Contents)
	log.Debugf("Found %d spot data files from today", lso2Len)
	if lso2Len == 0 {
		log.Debugf("ListObjects \"s3://%s/%s\" produced no keys", *ls2.Bucket, *ls2.Prefix)
	}

	// TODO: Worth it to use LastModifiedDate to determine if we should reparse the spot data?
	var keys []*string
	for _, obj := range lso.Contents {
		keys = append(keys, obj.Key)
	}
	for _, obj := range lso2.Contents {
		keys = append(keys, obj.Key)
	}

	header, err := csvutil.Header(spotInfo{}, "csv")
	if err != nil {
		return nil, err
	}
	fieldsPerRecord := len(header)

	spots := make(map[string]*spotInfo)
	for _, key := range keys {
		getObj := &s3.GetObjectInput{
			Bucket: awsSDK.String(bucket),
			Key:    key,
		}

		buf := manager.NewWriteAtBuffer([]byte{})
		_, err := downloader.Download(context.TODO(), buf, getObj)
		if err != nil {
			aws.ServiceAccountChecks.Set("objectList", &models.ServiceAccountCheck{
				Message:        "Object Get Permissions Available",
				Status:         false,
				AdditionalInfo: err.Error(),
			})
			return nil, err
		} else {
			aws.ServiceAccountChecks.Set("objectList", &models.ServiceAccountCheck{
				Message: "Object Get Permissions Available",
				Status:  true,
			})
		}

		r := bytes.NewReader(buf.Bytes())

		gr, err := gzip.NewReader(r)
		if err != nil {
			return nil, err
		}

		csvReader := csv.NewReader(gr)
		csvReader.Comma = '\t'
		csvReader.FieldsPerRecord = fieldsPerRecord

		dec, err := csvutil.NewDecoder(csvReader, header...)
		if err != nil {
			return nil, err
		}

		var foundVersion string
		for {
			spot := spotInfo{}
			err := dec.Decode(&spot)
			csvParseErr, isCsvParseErr := err.(*csv.ParseError)
			if err == io.EOF {
				break
			} else if err == csvutil.ErrFieldCount || (isCsvParseErr && csvParseErr.Err == csv.ErrFieldCount) {
				rec := dec.Record()
				// the first two "Record()" will be the comment lines
				// and they show up as len() == 1
				// the first of which is "#Version"
				// the second of which is "#Fields: "
				if len(rec) != 1 {
					log.Infof("Expected %d spot info fields but received %d: %s", fieldsPerRecord, len(rec), rec)
					continue
				}
				if len(foundVersion) == 0 {
					spotFeedVersion := rec[0]
					log.Debugf("Spot feed version is \"%s\"", spotFeedVersion)
					matches := versionRx.FindStringSubmatch(spotFeedVersion)
					if matches != nil {
						foundVersion = matches[1]
						if foundVersion != supportedSpotFeedVersion {
							log.Infof("Unsupported spot info feed version: wanted \"%s\" got \"%s\"", supportedSpotFeedVersion, foundVersion)
							break
						}
					}
					continue
				} else if strings.Index(rec[0], "#") == 0 {
					continue
				} else {
					log.Infof("skipping non-TSV line: %s", rec)
					continue
				}
			} else if err != nil {
				log.Warnf("Error during spot info decode: %+v", err)
				continue
			}

			log.DedupedInfof(5, "Found spot info for: %s", spot.InstanceID)
			spots[spot.InstanceID] = &spot
		}
		gr.Close()
	}
	return spots, nil
}

// ApplyReservedInstancePricing TODO
func (aws *AWS) ApplyReservedInstancePricing(nodes map[string]*models.Node) {
}

func (aws *AWS) ServiceAccountStatus() *models.ServiceAccountStatus {
	return aws.ServiceAccountChecks.GetStatus()
}

func (aws *AWS) CombinedDiscountForNode(instanceType string, isPreemptible bool, defaultDiscount, negotiatedDiscount float64) float64 {
	return 1.0 - ((1.0 - defaultDiscount) * (1.0 - negotiatedDiscount))
}

// Regions returns a predefined list of AWS regions
func (aws *AWS) Regions() []string {
	regionOverrides := env.GetRegionOverrideList()

	if len(regionOverrides) > 0 {
		log.Debugf("Overriding AWS regions with configured region list: %+v", regionOverrides)
		return regionOverrides
	}

	return awsRegions
}

// PricingSourceSummary returns the pricing source summary for the provider.
// The summary represents what was _parsed_ from the pricing source, not
// everything that was _available_ in the pricing source.
func (aws *AWS) PricingSourceSummary() interface{} {
	// encode the pricing source summary as a JSON string
	return aws.Pricing
}

func parseRegionFromAZ(zone string) string {
	region := ""
	for _, r := range awsRegions {
		if strings.HasPrefix(zone, r) && len(r) > len(region) {
			region = r
		}
	}
	if region == "" {
		region = regionRx.FindString(zone)
	}
	return region
}