selector

type Filters struct {
	// AvailabilityZones is the AWS Availability Zones where instances will be provisioned.
	// Instance type capacity can vary between availability zones.
	// Will accept zone names or ids
	// Example: us-east-1a, us-east-1b, us-east-2a, etc. OR use1-az1, use2-az2, etc.
	AvailabilityZones *[]string

	// AvailabilityZone [DEPRECATED] is the AWS Availability Zone where instances will be provisioned.
	// Instance type capacity can vary between availability zones.
	// Will accept zone name or id
	// Example: us-east-1a, us-east-1b, us-east-2a, etc. OR use1-az1, use2-az2, etc.
	AvailabilityZone *string

	// BareMetal is used to only return bare metal instance type results
	BareMetal *bool

	// Burstable is used to only return burstable instance type results like the t* series
	Burstable *bool

	// CPUArchitecture of the EC2 instance type
	// Possible values are: x86_64 or arm64
	CPUArchitecture *string

	// CurrentGeneration returns the latest generation of instance types
	CurrentGeneration *bool

	// EnaSupport returns instances that can support an Elastic Network Adapter.
	EnaSupport *bool

	// FPGA is used to only return FPGA instance type results
	Fpga *bool

	// GpusRange filter is a range of acceptable GPU count available to an EC2 instance type
	GpusRange *IntRangeFilter

	// GpuMemoryRange filter is a range of acceptable GPU memory available to an EC2 instance type in aggreagte across all GPUs.
	GpuMemoryRange *IntRangeFilter

	// HibernationSupported denotes whether EC2 hibernate is supported
	// Possible values are: true or false
	HibernationSupported *bool

	// Hypervisor is used to return only a specific hypervisor backed instance type
	// Possibly values are: xen or nitro
	Hypervisor *string

	// MaxResults is the maximum number of instance types to return that match the filter criteria
	MaxResults *int

	// MemoryRange filter is a range of acceptable DRAM memory in Mebibytes (MiB) for the instance type
	MemoryRange *IntRangeFilter

	// NetworkInterfaces filter is a range of the number of ENI attachments an instance type can support
	NetworkInterfaces *IntRangeFilter

	// NetworkPerformance filter is a range of network bandwidth an instance type can support
	NetworkPerformance *IntRangeFilter

	// PlacementGroupStrategy is used to return instance types based on its support
	// for a specific placement group strategy
	// Possible values are: cluster, spread, or partition
	PlacementGroupStrategy *string

	// Region is the AWS Region where instances will be provisioned.
	// Instance type availability can vary between AWS Regions.
	// Example: us-east-1, us-east-2, eu-west-1, etc.
	Region *string

	// RootDeviceType is the backing device of the root storage volume
	// Possible values are: instance-store or ebs
	RootDeviceType *string

	// UsageClass of the instance EC2 instance type
	// Possible values are: spot or on-demand
	UsageClass *string

	// VCpusRange filter is a range of acceptable VCpus for the instance type
	VCpusRange *IntRangeFilter

	// VcpusToMemoryRatio is a ratio of vcpus to memory expressed as a floating point
	VCpusToMemoryRatio *float64

	// AllowList is a regex of allowed instance types
	AllowList *regexp.Regexp

	// DenyList is a regex of excluded instance types
	DenyList *regexp.Regexp

	// InstanceTypeBase is a base instance type which is used to retrieve similarly spec'd instance types
	InstanceTypeBase *string

	// Flexible finds an opinionated set of general (c, m, r, t, a, etc.) instance types that match a criteria specified
	// or defaults to 4 vcpus
	Flexible *bool
}

type FiltersTransform interface {
	Transform(Filters) (Filters, error)
}

type InstanceTypesOutput interface {
	Output([]*ec2.InstanceTypeInfo) []string
}

type InstanceTypesOutputFn func([]*ec2.InstanceTypeInfo) []string

type IntRangeFilter struct {
	UpperBound int
	LowerBound int
}

type Selector struct {
	EC2 ec2iface.EC2API
}

type TransformFn func(Filters) (Filters, error)