/*
Copyright (c) 2017 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 simulator

import (
	"context"
	"path"
	"strings"
	"testing"

	"github.com/google/uuid"

	"github.com/vmware/govmomi"
	"github.com/vmware/govmomi/object"
	"github.com/vmware/govmomi/vim25/types"
)

func TestVirtualDiskManager(t *testing.T) {
	ctx := context.Background()

	m := ESX()
	defer m.Remove()
	err := m.Create()
	if err != nil {
		t.Fatal(err)
	}

	s := m.Service.NewServer()
	defer s.Close()

	c, err := govmomi.NewClient(ctx, s.URL, true)
	if err != nil {
		t.Fatal(err)
	}

	dm := object.NewVirtualDiskManager(c.Client)
	fm := object.NewFileManager(c.Client)

	spec := &types.FileBackedVirtualDiskSpec{
		VirtualDiskSpec: types.VirtualDiskSpec{
			AdapterType: string(types.VirtualDiskAdapterTypeLsiLogic),
			DiskType:    string(types.VirtualDiskTypeThin),
		},
		CapacityKb: 1024 * 1024,
	}

	name := "[LocalDS_0] disks/disk1.vmdk"

	for i, fail := range []bool{true, false, true} {
		task, err := dm.CreateVirtualDisk(ctx, name, nil, spec)
		if err != nil {
			t.Fatal(err)
		}

		err = task.Wait(ctx)
		if fail {
			if err == nil {
				t.Error("expected error") // disk1 already exists
			}
		} else {
			if err != nil {
				t.Error(err)
			}
		}

		if i == 0 {
			err = fm.MakeDirectory(ctx, path.Dir(name), nil, true)
			if err != nil {
				t.Fatal(err)
			}
		}
	}

	qname := name
	for _, fail := range []bool{false, true} {
		id, err := dm.QueryVirtualDiskUuid(ctx, qname, nil)
		if fail {
			if err == nil {
				t.Error("expected error")
			}
		} else {
			if err != nil {
				t.Error(err)
			}

			_, err = uuid.Parse(id)
			if err != nil {
				t.Error(err)
			}
		}
		qname += "-enoent"
	}

	old := name
	name = strings.Replace(old, "disk1", "disk2", 1)

	for _, fail := range []bool{false, true} {
		task, err := dm.MoveVirtualDisk(ctx, old, nil, name, nil, false)
		if err != nil {
			t.Fatal(err)
		}

		err = task.Wait(ctx)
		if fail {
			if err == nil {
				t.Error("expected error") // disk1 no longer exists
			}
		} else {
			if err != nil {
				t.Error(err)
			}
		}
	}

	for _, fail := range []bool{false, true} {
		task, err := dm.CopyVirtualDisk(ctx, name, nil, old, nil, &types.VirtualDiskSpec{}, false)
		if err != nil {
			t.Fatal(err)
		}

		err = task.Wait(ctx)
		if fail {
			if err == nil {
				t.Error("expected error") // disk1 exists again
			}
		} else {
			if err != nil {
				t.Error(err)
			}
		}
	}

	for _, fail := range []bool{false, true} {
		task, err := dm.DeleteVirtualDisk(ctx, name, nil)
		if err != nil {
			t.Fatal(err)
		}

		err = task.Wait(ctx)
		if fail {
			if err == nil {
				t.Error("expected error") // disk2 no longer exists
			}
		} else {
			if err != nil {
				t.Error(err)
			}
		}
	}
}