/*
Copyright 2017 The Kubernetes Authors.

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 phases

import (
	"github.com/spf13/cobra"

	kubeadmapi "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm"
	kubeadmapiext "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm/v1alpha1"
	cmdutil "k8s.io/kubernetes/cmd/kubeadm/app/cmd/util"
	kubeadmconstants "k8s.io/kubernetes/cmd/kubeadm/app/constants"
	controlplanephase "k8s.io/kubernetes/cmd/kubeadm/app/phases/controlplane"
	"k8s.io/kubernetes/pkg/api"
)

// NewCmdControlplane return main command for Controlplane phase
func NewCmdControlplane() *cobra.Command {
	cmd := &cobra.Command{
		Use:   "controlplane",
		Short: "Generate all static pod manifest files necessary to establish the control plane.",
		RunE:  cmdutil.SubCmdRunE("controlplane"),
	}

	manifestPath := kubeadmconstants.GetStaticPodDirectory()
	cmd.AddCommand(getControlPlaneSubCommands(manifestPath, "")...)
	return cmd
}

// getControlPlaneSubCommands returns sub commands for Controlplane phase
func getControlPlaneSubCommands(outDir, defaultKubernetesVersion string) []*cobra.Command {

	cfg := &kubeadmapiext.MasterConfiguration{}

	// This is used for unit testing only...
	// If we wouldn't set this to something, the code would dynamically look up the version from the internet
	// By setting this explicitely for tests workarounds that
	if defaultKubernetesVersion != "" {
		cfg.KubernetesVersion = defaultKubernetesVersion
	}

	// Default values for the cobra help text
	api.Scheme.Default(cfg)

	var cfgPath string
	var subCmds []*cobra.Command

	subCmdProperties := []struct {
		use     string
		short   string
		cmdFunc func(outDir string, cfg *kubeadmapi.MasterConfiguration) error
	}{
		{
			use:     "all",
			short:   "Generate all static pod manifest files necessary to establish the control plane.",
			cmdFunc: controlplanephase.CreateInitStaticPodManifestFiles,
		},
		{
			use:     "apiserver",
			short:   "Generate apiserver static pod manifest.",
			cmdFunc: controlplanephase.CreateAPIServerStaticPodManifestFile,
		},
		{
			use:     "controller-manager",
			short:   "Generate controller-manager static pod manifest.",
			cmdFunc: controlplanephase.CreateControllerManagerStaticPodManifestFile,
		},
		{
			use:     "scheduler",
			short:   "Generate scheduler static pod manifest.",
			cmdFunc: controlplanephase.CreateSchedulerStaticPodManifestFile,
		},
	}

	for _, properties := range subCmdProperties {
		// Creates the UX Command
		cmd := &cobra.Command{
			Use:   properties.use,
			Short: properties.short,
			Run:   runCmdPhase(properties.cmdFunc, &outDir, &cfgPath, cfg),
		}

		// Add flags to the command
		cmd.Flags().StringVar(&cfg.CertificatesDir, "cert-dir", cfg.CertificatesDir, `The path where certificates are stored.`)
		cmd.Flags().StringVar(&cfg.KubernetesVersion, "kubernetes-version", cfg.KubernetesVersion, `Choose a specific Kubernetes version for the control plane.`)

		if properties.use == "all" || properties.use == "apiserver" {
			cmd.Flags().StringVar(&cfg.API.AdvertiseAddress, "apiserver-advertise-address", cfg.API.AdvertiseAddress, "The IP address or DNS name the API Server is accessible on.")
			cmd.Flags().Int32Var(&cfg.API.BindPort, "apiserver-bind-port", cfg.API.BindPort, "The port the API Server is accessible on.")
			cmd.Flags().StringVar(&cfg.Networking.ServiceSubnet, "service-cidr", cfg.Networking.ServiceSubnet, "The range of IP address used for service VIPs.")
		}

		if properties.use == "all" || properties.use == "controller-manager" {
			cmd.Flags().StringVar(&cfg.Networking.PodSubnet, "pod-network-cidr", cfg.Networking.PodSubnet, "The range of IP addresses used for the pod network.")
		}

		cmd.Flags().StringVar(&cfgPath, "config", cfgPath, "Path to kubeadm config file (WARNING: Usage of a configuration file is experimental)")

		subCmds = append(subCmds, cmd)
	}

	return subCmds
}