/*
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package v1alpha1

import (
	"fmt"
	"regexp"

	"github.com/aws/aws-sdk-go/service/ec2"
	v1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/apimachinery/pkg/runtime/schema"
	"k8s.io/apimachinery/pkg/runtime/serializer"
	"k8s.io/apimachinery/pkg/util/sets"

	"github.com/aws/karpenter-core/pkg/apis/v1alpha5"
)

var (
	LabelDomain = "karpenter.k8s.aws"

	CapacityTypeSpot       = ec2.DefaultTargetCapacityTypeSpot
	CapacityTypeOnDemand   = ec2.DefaultTargetCapacityTypeOnDemand
	AWSToKubeArchitectures = map[string]string{
		"x86_64":                   v1alpha5.ArchitectureAmd64,
		v1alpha5.ArchitectureArm64: v1alpha5.ArchitectureArm64,
	}
	WellKnownArchitectures = sets.NewString(
		v1alpha5.ArchitectureAmd64,
		v1alpha5.ArchitectureArm64,
	)
	RestrictedLabelDomains = []string{
		LabelDomain,
	}
	RestrictedTagPatterns = []*regexp.Regexp{
		// Adheres to cluster name pattern matching as specified in the API spec
		// https://docs.aws.amazon.com/eks/latest/APIReference/API_CreateCluster.html
		regexp.MustCompile(`^kubernetes\.io/cluster/[0-9A-Za-z][A-Za-z0-9\-_]*$`),
		regexp.MustCompile(fmt.Sprintf("^%s$", regexp.QuoteMeta(v1alpha5.ProvisionerNameLabelKey))),
		regexp.MustCompile(fmt.Sprintf("^%s$", regexp.QuoteMeta(v1alpha5.MachineManagedByAnnotationKey))),
	}
	AMIFamilyBottlerocket = "Bottlerocket"
	AMIFamilyAL2          = "AL2"
	AMIFamilyUbuntu       = "Ubuntu"
	AMIFamilyWindows2019  = "Windows2019"
	AMIFamilyWindows2022  = "Windows2022"
	AMIFamilyCustom       = "Custom"
	SupportedAMIFamilies  = []string{
		AMIFamilyBottlerocket,
		AMIFamilyAL2,
		AMIFamilyUbuntu,
		AMIFamilyWindows2019,
		AMIFamilyWindows2022,
		AMIFamilyCustom,
	}
	SupportedContainerRuntimesByAMIFamily = map[string]sets.Set[string]{
		AMIFamilyBottlerocket: sets.New("containerd"),
		AMIFamilyAL2:          sets.New("dockerd", "containerd"),
		AMIFamilyUbuntu:       sets.New("dockerd", "containerd"),
		AMIFamilyWindows2019:  sets.New("dockerd", "containerd"),
		AMIFamilyWindows2022:  sets.New("dockerd", "containerd"),
	}

	Windows2019                                           = "2019"
	Windows2022                                           = "2022"
	WindowsCore                                           = "Core"
	Windows2019Build                                      = "10.0.17763"
	Windows2022Build                                      = "10.0.20348"
	ResourceNVIDIAGPU             v1.ResourceName         = "nvidia.com/gpu"
	ResourceAMDGPU                v1.ResourceName         = "amd.com/gpu"
	ResourceAWSNeuron             v1.ResourceName         = "aws.amazon.com/neuron"
	ResourceHabanaGaudi           v1.ResourceName         = "habana.ai/gaudi"
	ResourceAWSPodENI             v1.ResourceName         = "vpc.amazonaws.com/pod-eni"
	ResourcePrivateIPv4Address    v1.ResourceName         = "vpc.amazonaws.com/PrivateIPv4Address"
	NVIDIAacceleratorManufacturer AcceleratorManufacturer = "nvidia"
	AWSAcceleratorManufacturer    AcceleratorManufacturer = "aws"

	LabelInstanceHypervisor                   = LabelDomain + "/instance-hypervisor"
	LabelInstanceEncryptionInTransitSupported = LabelDomain + "/instance-encryption-in-transit-supported"
	LabelInstanceCategory                     = LabelDomain + "/instance-category"
	LabelInstanceFamily                       = LabelDomain + "/instance-family"
	LabelInstanceGeneration                   = LabelDomain + "/instance-generation"
	LabelInstanceLocalNVME                    = LabelDomain + "/instance-local-nvme"
	LabelInstanceSize                         = LabelDomain + "/instance-size"
	LabelInstanceCPU                          = LabelDomain + "/instance-cpu"
	LabelInstanceMemory                       = LabelDomain + "/instance-memory"
	LabelInstanceNetworkBandwidth             = LabelDomain + "/instance-network-bandwidth"
	LabelInstancePods                         = LabelDomain + "/instance-pods"
	LabelInstanceGPUName                      = LabelDomain + "/instance-gpu-name"
	LabelInstanceGPUManufacturer              = LabelDomain + "/instance-gpu-manufacturer"
	LabelInstanceGPUCount                     = LabelDomain + "/instance-gpu-count"
	LabelInstanceGPUMemory                    = LabelDomain + "/instance-gpu-memory"
	LabelInstanceAMIID                        = LabelDomain + "/instance-ami-id"
	LabelInstanceAcceleratorName              = LabelDomain + "/instance-accelerator-name"
	LabelInstanceAcceleratorManufacturer      = LabelDomain + "/instance-accelerator-manufacturer"
	LabelInstanceAcceleratorCount             = LabelDomain + "/instance-accelerator-count"
	AnnotationNodeTemplateHash                = LabelDomain + "/nodetemplate-hash"
)

var (
	Scheme             = runtime.NewScheme()
	codec              = serializer.NewCodecFactory(Scheme, serializer.EnableStrict)
	Group              = "karpenter.k8s.aws"
	SchemeGroupVersion = schema.GroupVersion{Group: Group, Version: "v1alpha1"}
	SchemeBuilder      = runtime.NewSchemeBuilder(func(scheme *runtime.Scheme) error {
		scheme.AddKnownTypes(SchemeGroupVersion,
			&AWSNodeTemplate{},
			&AWSNodeTemplateList{},
		)
		metav1.AddToGroupVersion(scheme, SchemeGroupVersion)
		return nil
	})
)

func init() {
	Scheme.AddKnownTypes(schema.GroupVersion{Group: v1alpha5.ExtensionsGroup, Version: "v1alpha1"}, &AWS{})
	v1alpha5.RestrictedLabelDomains = v1alpha5.RestrictedLabelDomains.Insert(RestrictedLabelDomains...)
	v1alpha5.WellKnownLabels = v1alpha5.WellKnownLabels.Insert(
		LabelInstanceHypervisor,
		LabelInstanceEncryptionInTransitSupported,
		LabelInstanceCategory,
		LabelInstanceFamily,
		LabelInstanceGeneration,
		LabelInstanceSize,
		LabelInstanceLocalNVME,
		LabelInstanceCPU,
		LabelInstanceMemory,
		LabelInstanceNetworkBandwidth,
		LabelInstancePods,
		LabelInstanceGPUName,
		LabelInstanceGPUManufacturer,
		LabelInstanceGPUCount,
		LabelInstanceGPUMemory,
		LabelInstanceAcceleratorName,
		LabelInstanceAcceleratorManufacturer,
		LabelInstanceAcceleratorCount,
		v1.LabelWindowsBuild,
	)
}

type AcceleratorManufacturer string