/*
Copyright (c) 2016 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 snapshot

import (
	"context"
	"flag"

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

type create struct {
	*flags.VirtualMachineFlag

	description string
	memory      bool
	quiesce     bool
}

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

func (cmd *create) Register(ctx context.Context, f *flag.FlagSet) {
	cmd.VirtualMachineFlag, ctx = flags.NewVirtualMachineFlag(ctx)
	cmd.VirtualMachineFlag.Register(ctx, f)

	f.BoolVar(&cmd.memory, "m", true, "Include memory state")
	f.BoolVar(&cmd.quiesce, "q", false, "Quiesce guest file system")
	f.StringVar(&cmd.description, "d", "", "Snapshot description")
}

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

func (cmd *create) Description() string {
	return `Create snapshot of VM with NAME.

Examples:
  govc snapshot.create -vm my-vm happy-vm-state`
}

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

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

	vm, err := cmd.VirtualMachine()
	if err != nil {
		return err
	}

	if vm == nil {
		return flag.ErrHelp
	}

	task, err := vm.CreateSnapshot(ctx, f.Arg(0), cmd.description, cmd.memory, cmd.quiesce)
	if err != nil {
		return err
	}

	return task.Wait(ctx)
}