/*
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 pool

import (
	"flag"

	"github.com/vmware/govmomi/find"
	"github.com/vmware/govmomi/govc/cli"
	"github.com/vmware/govmomi/govc/flags"
	"golang.org/x/net/context"
)

type destroy struct {
	*flags.DatacenterFlag

	children bool
}

func init() {
	cli.Register("pool.destroy", &destroy{})
}

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

	f.BoolVar(&cmd.children, "children", false, "Remove all children pools")
}

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

func (cmd *destroy) Usage() string {
	return "POOL..."
}

func (cmd *destroy) Description() string {
	return "Destroy one or more resource POOLs.\n" + poolNameHelp
}

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

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

	for _, arg := range f.Args() {
		pools, err := finder.ResourcePoolList(context.TODO(), arg)
		if err != nil {
			if _, ok := err.(*find.NotFoundError); ok {
				// Ignore if pool cannot be found
				continue
			}

			return err
		}

		for _, pool := range pools {
			if cmd.children {
				err = pool.DestroyChildren(context.TODO())
				if err != nil {
					return err
				}
			} else {
				task, err := pool.Destroy(context.TODO())
				if err != nil {
					return err
				}
				err = task.Wait(context.TODO())
				if err != nil {
					return err
				}
			}
		}
	}

	return nil
}
