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/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"
	ReservedInstancePricingSource = "Savings Plan, Reserved Instance, and Out-Of-Cluster"

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

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

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])")

	// 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.SpotRefreshEnabled() {
		sps.Available = false
		sps.Error = "Spot instances not set up"
		sps.Enabled = false
	} else {
		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"
		}
	}
	sources[SpotPricingSource] = sps

	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
	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
	RIPricingByInstanceID       map[string]*RIData
	RIPricingError              error
	RIDataRunning               bool
	RIDataLock                  sync.RWMutex
	SavingsPlanDataByInstanceID map[string]*SavingsPlanData
	SavingsPlanDataRunning      bool
	SavingsPlanDataLock         sync.RWMutex
	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"
const 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
var 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"`
	CURVersion       string `json:"curVersion"` // "1.0" or "2.0", defaults to "2.0" if not specified
}

// 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%"
	}
	if c.ShareTenancyCosts == "" {
		c.ShareTenancyCosts = models.DefaultShareTenancyCost
	}

	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.ServiceKeyName == "" {
		config.ServiceKeyName = env.GetAWSAccessKeyID()
	}
	if config.ServiceKeySecret == "" {
		config.ServiceKeySecret = env.GetAWSAccessKeySecret()
	}

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

	return &AWSAccessKey{AccessKeyID: config.ServiceKeyName, SecretAccessKey: config.ServiceKeySecret}, 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,
		CURVersion:       config.AthenaCURVersion,
	}, nil
}

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

func (aws *AWS) UpdateConfig(r io.Reader, updateType string) (*models.CustomPricing, error) {
	return aws.Config.Update(func(c *models.CustomPricing) error {
		if updateType == SpotInfoUpdateType {
			asfi := AwsSpotFeedInfo{}
			err := json.NewDecoder(r).Decode(&asfi)
			if err != nil {
				return err
			}

			// If the sample nil service key name is set, zero it out so that it is not
			// misinterpreted as a real service key.
			if asfi.ServiceKeyName == "AKIXXX" {
				asfi.ServiceKeyName = ""
			}

			c.ServiceKeyName = asfi.ServiceKeyName
			if asfi.ServiceKeySecret != "" {
				c.ServiceKeySecret = asfi.ServiceKeySecret
			}
			c.SpotDataPrefix = asfi.Prefix
			c.SpotDataBucket = asfi.BucketName
			c.ProjectID = asfi.AccountID
			c.SpotDataRegion = asfi.Region
			c.SpotLabel = asfi.SpotLabel
			c.SpotLabelValue = asfi.SpotLabelValue

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

			// If the sample nil service key name is set, zero it out so that it is not
			// misinterpreted as a real service key.
			if aai.ServiceKeyName == "AKIXXX" {
				aai.ServiceKeyName = ""
			}

			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.ServiceKeyName = aai.ServiceKeyName
			if aai.ServiceKeySecret != "" {
				c.ServiceKeySecret = aai.ServiceKeySecret
			}
			if aai.MasterPayerARN != "" {
				c.MasterPayerARN = aai.MasterPayerARN
			}
			c.AthenaProjectID = aai.AccountID
			if aai.CURVersion != "" {
				c.AthenaCURVersion = aai.CURVersion
			}
		} else {
			a := make(map[string]interface{})
			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
	})
}

type awsKey struct {
	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
}

// 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{
		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
}

// 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) {

	pricingURL := "https://pricing.us-east-1.amazonaws.com/offers/v1.0/aws/AmazonEC2/current/"
	region := ""
	multiregion := false
	for _, n := range nodeList {
		labels := n.Labels
		currentNodeRegion := ""
		if r, ok := util.GetRegion(labels); ok {
			currentNodeRegion = r
			// Switch to Chinese endpoint for regions with the Chinese prefix
			if strings.HasPrefix(currentNodeRegion, "cn-") {
				pricingURL = "https://pricing.cn-north-1.amazonaws.com.cn/offers/v1.0/cn/AmazonEC2/current/"
			}
		} else {
			multiregion = true // We weren't able to detect the node's region, so pull all data.
			break
		}
		if region == "" { // We haven't set a region yet
			region = currentNodeRegion
		} else if region != "" && currentNodeRegion != region { // If two nodes have different regions here, we'll need to fetch all pricing data.
			multiregion = true
			break
		}
	}

	// Chinese multiregion endpoint only contains data for Chinese regions and Chinese regions are excluded from other endpoint
	if region != "" && !multiregion {
		pricingURL += region + "/"
	}

	pricingURL += "index.json"

	if env.GetAWSPricingURL() != "" { // Allow override of pricing URL
		pricingURL = env.GetAWSPricingURL()
	}

	log.Infof("starting download of \"%s\", which is quite large ...", pricingURL)
	resp, err := http.Get(pricingURL)
	if err != nil {
		log.Errorf("Bogus fetch of \"%s\": %v", pricingURL, err)
		return nil, pricingURL, err
	}
	return resp, pricingURL, err
}

// SpotRefreshEnabled determines whether the required configs to run the spot feed query have been set up
func (aws *AWS) SpotRefreshEnabled() bool {
	// Need a valid value for at least one of these fields to consider spot pricing as enabled
	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.SpotDataBucket
	aws.SpotDataPrefix = c.SpotDataPrefix
	aws.ProjectID = c.ProjectID
	aws.SpotDataRegion = c.SpotDataRegion

	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 !aws.RIDataRunning {
		err = aws.GetReservationDataFromAthena() // Block until one run has completed.
		if err != nil {
			log.Errorf("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 {
			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())
					}
				}
			}()
		}
	}

	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)

	if !aws.SpotRefreshEnabled() {
		return nil
	}

	// 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
}

func (aws *AWS) populatePricing(resp *http.Response, inputkeys map[string]bool) error {
	aws.Pricing = make(map[string]*AWSProductTerms)
	skusToKeys := make(map[string]string)
	dec := json.NewDecoder(resp.Body)
	for {
		t, err := dec.Token()
		if err == io.EOF {
			log.Infof("done loading \"%s\"\n", resp.Request.URL.String())
			break
		} else if err != nil {
			log.Errorf("error parsing response json %v", resp.Body)
			break
		}
		if t == "products" {
			_, err := dec.Token() // this should parse the opening "{""
			if err != nil {
				return err
			}
			for dec.More() {
				_, err := dec.Token() // the sku token
				if err != nil {
					return err
				}
				product := &AWSProduct{}

				err = dec.Decode(&product)
				if err != nil {
					log.Errorf("Error parsing response from \"%s\": %v", resp.Request.URL.String(), err.Error())
					break
				}

				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"
					if inputkeys[key] || inputkeys[spotKey] { // Just grab the sku even if spot, and change the price later.
						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
						skusToKeys[product.Sku] = key
					}
					aws.ValidPricingKeys[key] = true
					aws.ValidPricingKeys[spotKey] = true
				} else if strings.Contains(product.Attributes.UsageType, "EBS:Volume") {
					// UsageTypes may be prefixed with a region code - we're removing this when using
					// volTypes to keep lookups generic
					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
					skusToKeys[product.Sku] = key
					aws.ValidPricingKeys[key] = true
					aws.ValidPricingKeys[spotKey] = true
				} else if strings.Contains(product.Attributes.UsageType, "LoadBalancerUsage") && product.Attributes.Operation == "LoadBalancing:Network" {
					// since the costmodel is only using services of type LoadBalancer
					// (and not ingresses controlled by AWS load balancer controller)
					// we can safely filter for Network load balancers only
					productTerms := &AWSProductTerms{
						Sku:          product.Sku,
						LoadBalancer: &models.LoadBalancer{},
					}
					// there is no spot pricing for load balancers
					key := product.Attributes.RegionCode + ",LoadBalancerUsage"
					aws.Pricing[key] = productTerms
					skusToKeys[product.Sku] = key
					aws.ValidPricingKeys[key] = true
				}
			}
		}
		if t == "terms" {
			_, err := dec.Token() // this should parse the opening "{""
			if err != nil {
				return err
			}
			termType, err := dec.Token()
			if err != nil {
				return err
			}
			if termType == "OnDemand" {
				_, err := dec.Token()
				if err != nil { // again, should parse an opening "{"
					return err
				}
				for dec.More() {
					sku, err := dec.Token()
					if err != nil {
						return err
					}
					_, err = dec.Token() // another opening "{"
					if err != nil {
						return err
					}
					// SKUOndemand
					_, err = dec.Token()
					if err != nil {
						return err
					}
					offerTerm := &AWSOfferTerm{}
					err = dec.Decode(&offerTerm)
					if err != nil {
						log.Errorf("Error decoding AWS Offer Term: %s", err.Error())
					}

					key, ok := skusToKeys[sku.(string)]
					spotKey := key + ",preemptible"
					if ok {
						aws.Pricing[key].OnDemand = offerTerm
						if _, ok := aws.Pricing[spotKey]; ok {
							aws.Pricing[spotKey].OnDemand = offerTerm
						}
						var cost string
						if _, isMatch := OnDemandRateCodes[offerTerm.OfferTermCode]; isMatch {
							priceDimensionKey := strings.Join([]string{sku.(string), offerTerm.OfferTermCode, HourlyRateCode}, ".")
							dimension, ok := offerTerm.PriceDimensions[priceDimensionKey]
							if ok {
								cost = dimension.PricePerUnit.USD
							} else {
								// this is an edge case seen in AWS CN pricing files, including here just in case
								// if there is only one dimension, use it, even if the key is incorrect, otherwise assume defaults
								if len(offerTerm.PriceDimensions) == 1 {
									for key, backupDimension := range offerTerm.PriceDimensions {
										cost = backupDimension.PricePerUnit.USD
										log.DedupedWarningf(5, "using:%s for a price dimension instead of missing dimension: %s", offerTerm.PriceDimensions[key], priceDimensionKey)
										break
									}
								} else if len(offerTerm.PriceDimensions) == 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 {
							priceDimensionKey := strings.Join([]string{sku.(string), offerTerm.OfferTermCode, HourlyRateCodeCn}, ".")
							dimension, ok := offerTerm.PriceDimensions[priceDimensionKey]
							if ok {
								cost = dimension.PricePerUnit.CNY
							} else {
								// fall through logic for handling inconsistencies in AWS CN pricing files
								// if there is only one dimension, use it, even if the key is incorrect, otherwise assume defaults
								if len(offerTerm.PriceDimensions) == 1 {
									for key, backupDimension := range offerTerm.PriceDimensions {
										cost = backupDimension.PricePerUnit.CNY
										log.DedupedWarningf(5, "using:%s for a price dimension instead of missing dimension: %s", offerTerm.PriceDimensions[key], priceDimensionKey)
										break
									}
								} else if len(offerTerm.PriceDimensions) == 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)
								}
							}
						}
						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") {
							// If volume, we need to get hourly cost and add it to the PV object
							costFloat, _ := strconv.ParseFloat(cost, 64)
							hourlyPrice := costFloat / 730

							aws.Pricing[key].PV.Cost = strconv.FormatFloat(hourlyPrice, 'f', -1, 64)
						} else if strings.Contains(key, "LoadBalancerUsage") {
							costFloat, err := strconv.ParseFloat(cost, 64)
							if err != nil {
								return err
							}

							aws.Pricing[key].LoadBalancer.Cost = costFloat
						}
					}

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

// 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
	}

	return &models.Network{
		ZoneNetworkEgressCost:     znec,
		RegionNetworkEgressCost:   rnec,
		InternetNetworkEgressCost: inec,
	}, 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.DedupedWarningf(5, "Node %s marked preemptible but we have no data in spot feed", k.ID())
		if publicPricingFound {
			// return public price if found
			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
}

// 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 { // 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 == "" {
		awsClusterID := env.GetAWSClusterID()
		if awsClusterID != "" {
			log.Infof("Returning \"%s\" as ClusterName", awsClusterID)
			clusterName = awsClusterID
			log.Warnf("Warning - %s will be deprecated in a future release. Use %s instead", env.AWSClusterIDEnvVar, coreenv.ClusterIDEnvVar)
		} else if clusterName = coreenv.GetClusterID(); clusterName != "" {
			log.DedupedInfof(5, "Setting cluster name to %s from %s ", clusterName, coreenv.ClusterIDEnvVar)
		} else {
			clusterName = defaultClusterName
			log.DedupedWarningf(5, "Unable to detect cluster name - using default of %s", defaultClusterName)
			log.DedupedWarningf(5, "Please set cluster name through configmap or via %s env var", 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.ServiceKeyName != "" && cp.ServiceKeySecret != "" {
		aws.ServiceAccountChecks.Set("hasKey", &models.ServiceAccountCheck{
			Message: "AWS ServiceKey exists",
			Status:  true,
		})
		return cp.ServiceKeyName, cp.ServiceKeySecret
	}

	// 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
	}

	// If the sample nil service key name is set, zero it out so that it is not
	// misinterpreted as a real service key.
	if ak.AccessKeyID == "AKIXXX" {
		ak.AccessKeyID = ""
	}

	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 = regionRx.FindString(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) {
	//todo: use AWS pricing from all regions
	if disk.AvailabilityZone == nil {
		return nil, fmt.Errorf("nil region")
	}
	if disk.Size == nil {
		return nil, fmt.Errorf("nil disk size")
	}

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

	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 = fmt.Errorf("No Athena Bucket configured")
		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 = fmt.Errorf("No Athena Bucket configured")
		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
}