/*
Copyright (c) 2020 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 internal

import (
	"context"

	"github.com/vmware/govmomi/view"
	"github.com/vmware/govmomi/vim25"
	"github.com/vmware/govmomi/vim25/mo"
	"github.com/vmware/govmomi/vim25/types"
)

const (
	// ModulesPath is rest endpoint for the Cluster Modules API
	ModulesPath = "/vcenter/cluster/modules"
	// ModulesVMPath is rest endpoint for the Cluster Modules Members API
	ModulesVMPath = "/vcenter/cluster/modules/vm"
)

// Status is used for JSON encode/decode
type Status struct {
	Success bool `json:"success"`
}

// CreateModule is used for JSON encode/decode
type CreateModule struct {
	Spec struct {
		ID string `json:"cluster"`
	} `json:"spec"`
}

// ModuleMembers is used for JSON encode/decode
type ModuleMembers struct {
	VMs []string `json:"vms"`
}

// AsReferences converts the ModuleMembers.VM field to morefs
func (m *ModuleMembers) AsReferences() []types.ManagedObjectReference {
	refs := make([]types.ManagedObjectReference, 0, len(m.VMs))
	for _, id := range m.VMs {
		refs = append(refs, types.ManagedObjectReference{
			Type:  "VirtualMachine",
			Value: id,
		})
	}
	return refs
}

// ClusterVM returns all VM references in the given cluster
func ClusterVM(c *vim25.Client, cluster mo.Reference) ([]mo.Reference, error) {
	ctx := context.Background()
	kind := []string{"VirtualMachine"}

	m := view.NewManager(c)
	v, err := m.CreateContainerView(ctx, cluster.Reference(), kind, true)
	if err != nil {
		return nil, err
	}
	defer func() { _ = v.Destroy(ctx) }()

	refs, err := v.Find(ctx, kind, nil)
	if err != nil {
		return nil, err
	}

	vms := make([]mo.Reference, 0, len(refs))
	for i := range refs {
		vms = append(vms, refs[i])
	}

	return vms, nil
}