/*
Copyright 2020 The Flux 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 main

import (
	"fmt"
	"strconv"

	"github.com/spf13/cobra"
	"golang.org/x/text/cases"
	"golang.org/x/text/language"
	"k8s.io/apimachinery/pkg/runtime"

	kustomizev1 "github.com/fluxcd/kustomize-controller/api/v1"

	"github.com/fluxcd/flux2/v2/internal/utils"
)

type getKustomizationFlags struct {
	showSource bool
}

var getKsArgs getKustomizationFlags

var getKsCmd = &cobra.Command{
	Use:     "kustomizations",
	Aliases: []string{"ks", "kustomization"},
	Short:   "Get Kustomization statuses",
	Long:    `The get kustomizations command prints the statuses of the resources.`,
	Example: `  # List all kustomizations and their status
  flux get kustomizations

  # List all kustomizations with source information
  flux get kustomizations --show-source`,
	ValidArgsFunction: resourceNamesCompletionFunc(kustomizev1.GroupVersion.WithKind(kustomizev1.KustomizationKind)),
	RunE: func(cmd *cobra.Command, args []string) error {
		get := getCommand{
			apiType: kustomizationType,
			list:    &kustomizationListAdapter{&kustomizev1.KustomizationList{}},
			funcMap: make(typeMap),
		}

		err := get.funcMap.registerCommand(get.apiType.kind, func(obj runtime.Object) (summarisable, error) {
			o, ok := obj.(*kustomizev1.Kustomization)
			if !ok {
				return nil, fmt.Errorf("Impossible to cast type %#v kustomization", obj)
			}

			sink := kustomizationListAdapter{
				&kustomizev1.KustomizationList{
					Items: []kustomizev1.Kustomization{
						*o,
					},
				},
			}
			return sink, nil
		})

		if err != nil {
			return err
		}

		if err := get.run(cmd, args); err != nil {
			return err
		}

		return nil
	},
}

func init() {
	getKsCmd.Flags().BoolVar(&getKsArgs.showSource, "show-source", false, "show the source reference for each kustomization")
	getCmd.AddCommand(getKsCmd)
}

func (a kustomizationListAdapter) summariseItem(i int, includeNamespace bool, includeKind bool) []string {
	item := a.Items[i]
	revision := item.Status.LastAppliedRevision
	status, msg := statusAndMessage(item.Status.Conditions)
	revision = utils.TruncateHex(revision)
	msg = utils.TruncateHex(msg)
	row := nameColumns(&item, includeNamespace, includeKind)
	if getKsArgs.showSource {
		sourceNs := item.Spec.SourceRef.Namespace
		if sourceNs == "" {
			sourceNs = item.GetNamespace()
		}
		row = append(row, fmt.Sprintf("%s/%s/%s",
			item.Spec.SourceRef.Kind,
			sourceNs,
			item.Spec.SourceRef.Name))
	}
	return append(row,
		revision, cases.Title(language.English).String(strconv.FormatBool(item.Spec.Suspend)), status, msg)
}

func (a kustomizationListAdapter) headers(includeNamespace bool) []string {
	headers := []string{"Name"}
	if getKsArgs.showSource {
		headers = append(headers, "Source")
	}
	headers = append(headers, "Revision", "Suspended", "Ready", "Message")
	if includeNamespace {
		headers = append([]string{"Namespace"}, headers...)
	}
	return headers
}

func (a kustomizationListAdapter) statusSelectorMatches(i int, conditionType, conditionStatus string) bool {
	item := a.Items[i]
	return statusMatches(conditionType, conditionStatus, item.Status.Conditions)
}