/*
Copyright (c) 2015 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 portgroup

import (
	"context"
	"flag"
	"fmt"

	"github.com/vmware/govmomi/govc/cli"
	"github.com/vmware/govmomi/govc/flags"
	"github.com/vmware/govmomi/object"
	"github.com/vmware/govmomi/vim25/types"
)

type add struct {
	*flags.DatacenterFlag

	DVPortgroupConfigSpec

	path string
}

func init() {
	cli.Register("dvs.portgroup.add", &add{})
}

func (cmd *add) Register(ctx context.Context, f *flag.FlagSet) {
	cmd.DatacenterFlag, ctx = flags.NewDatacenterFlag(ctx)
	cmd.DatacenterFlag.Register(ctx, f)

	f.StringVar(&cmd.path, "dvs", "", "DVS path")

	cmd.DVPortgroupConfigSpec.NumPorts = 128 // default

	cmd.DVPortgroupConfigSpec.Register(ctx, f)
}

func (cmd *add) Description() string {
	return `Add portgroup to DVS.

The '-type' options are defined by the dvs.DistributedVirtualPortgroup.PortgroupType API.
The UI labels '-type' as "Port binding" with the following choices:
    "Static binding":  earlyBinding
    "Dynanic binding": lateBinding
    "No binding":      ephemeral

The '-auto-expand' option is labeled in the UI as "Port allocation".
The default value is false, behaves as the UI labeled "Fixed" choice.
When given '-auto-expand=true', behaves as the UI labeled "Elastic" choice.

Examples:
  govc dvs.create DSwitch
  govc dvs.portgroup.add -dvs DSwitch -type earlyBinding -nports 16 ExternalNetwork
  govc dvs.portgroup.add -dvs DSwitch -type ephemeral InternalNetwork
  govc object.destroy network/InternalNetwork # remove the portgroup`
}

func (cmd *add) Process(ctx context.Context) error {
	if err := cmd.DatacenterFlag.Process(ctx); err != nil {
		return err
	}
	return nil
}

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

func (cmd *add) Run(ctx context.Context, f *flag.FlagSet) error {
	if f.NArg() == 0 {
		return flag.ErrHelp
	}

	name := f.Arg(0)

	finder, err := cmd.Finder()
	if err != nil {
		return err
	}

	net, err := finder.Network(ctx, cmd.path)
	if err != nil {
		return err
	}

	dvs, ok := net.(*object.DistributedVirtualSwitch)
	if !ok {
		return fmt.Errorf("%s (%T) is not of type %T", cmd.path, net, dvs)
	}

	cmd.DVPortgroupConfigSpec.Name = name

	task, err := dvs.AddPortgroup(ctx, []types.DVPortgroupConfigSpec{cmd.Spec()})
	if err != nil {
		return err
	}

	logger := cmd.ProgressLogger(fmt.Sprintf("adding %s portgroup to dvs %s... ", name, dvs.InventoryPath))
	defer logger.Wait()

	_, err = task.WaitForResult(ctx, logger)
	return err
}
