/*
Copyright (c) 2018 VMware, Inc. All Rights Reserved.

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 category

import (
	"context"
	"flag"
	"fmt"

	"github.com/vmware/govmomi/govc/cli"
	"github.com/vmware/govmomi/govc/flags"
	"github.com/vmware/govmomi/vapi/tags"
)

type create struct {
	*flags.ClientFlag
	cat   tags.Category
	multi bool
}

func init() {
	cli.Register("tags.category.create", &create{})
}

func (cmd *create) Register(ctx context.Context, f *flag.FlagSet) {
	cmd.ClientFlag, ctx = flags.NewClientFlag(ctx)
	cmd.ClientFlag.Register(ctx, f)
	f.StringVar(&cmd.cat.Description, "d", "", "Description")
	f.Var((*kinds)(&cmd.cat.AssociableTypes), "t", "Object types")
	f.BoolVar(&cmd.multi, "m", false, "Allow multiple tags per object")
}

type kinds []string

func (e *kinds) String() string {
	return fmt.Sprint(*e)
}

func (e *kinds) Set(value string) error {
	*e = append(*e, value)
	return nil
}

func cardinality(multi bool) string {
	if multi {
		return "MULTIPLE"
	}
	return "SINGLE"
}

func (cmd *create) Usage() string {
	return "NAME"
}

func (cmd *create) Description() string {
	return `Create tag category.

This command will output the ID of the new tag category.

Examples:
  govc tags.category.create -d "Kubernetes region" -t Datacenter k8s-region
  govc tags.category.create -d "Kubernetes zone" k8s-zone`
}

func (cmd *create) Run(ctx context.Context, f *flag.FlagSet) error {
	if f.NArg() != 1 {
		return flag.ErrHelp
	}

	cmd.cat.Name = f.Arg(0)
	cmd.cat.Cardinality = cardinality(cmd.multi)

	c, err := cmd.RestClient()
	if err != nil {
		return err
	}

	id, err := tags.NewManager(c).CreateCategory(ctx, &cmd.cat)
	if err != nil {
		return err
	}

	fmt.Println(id)
	return nil
}
