package plugin

import (
	"context"

	"github.com/hashicorp/boundary/internal/errors"
	"github.com/hashicorp/boundary/internal/host/plugin/store"
	"github.com/hashicorp/boundary/internal/oplog"
	"google.golang.org/protobuf/proto"
)

// A HostSet is a collection of hosts from the set's catalog.
type HostSet struct {
	*store.HostSet
	tableName string `gorm:"-"`
}

// NewHostSet creates a new in memory HostSet assigned to catalogId. Attributes,
// name, description, and preferred endpoints are the only valid options. All
// other options are ignored.
func NewHostSet(ctx context.Context, catalogId string, opt ...Option) (*HostSet, error) {
	const op = "plugin.NewHostSet"
	opts := getOpts(opt...)
	attrs, err := proto.Marshal(opts.withAttributes)
	if err != nil {
		return nil, errors.Wrap(ctx, err, op, errors.WithCode(errors.InvalidParameter))
	}

	set := &HostSet{
		HostSet: &store.HostSet{
			CatalogId:          catalogId,
			Name:               opts.withName,
			Description:        opts.withDescription,
			Attributes:         attrs,
			PreferredEndpoints: opts.withPreferredEndpoints,
		},
	}

	return set, nil
}

// TableName returns the table name for the host set.
func (s *HostSet) TableName() string {
	if s.tableName != "" {
		return s.tableName
	}
	return "host_plugin_set"
}

// SetTableName sets the table name. If the caller attempts to
// set the name to "" the name will be reset to the default name.
func (s *HostSet) SetTableName(n string) {
	s.tableName = n
}

func allocHostSet() *HostSet {
	return &HostSet{
		HostSet: &store.HostSet{},
	}
}

func (s *HostSet) clone() *HostSet {
	cp := proto.Clone(s.HostSet)
	hs := &HostSet{
		HostSet: cp.(*store.HostSet),
	}
	if s.Attributes != nil && len(s.Attributes) == 0 && hs.Attributes == nil {
		hs.Attributes = []byte{}
	}
	return hs
}

func (s *HostSet) oplog(op oplog.OpType) oplog.Metadata {
	metadata := oplog.Metadata{
		"resource-public-id": []string{s.PublicId},
		"resource-type":      []string{"plugin-host-set"},
		"op-type":            []string{op.String()},
	}
	if s.CatalogId != "" {
		metadata["catalog-id"] = []string{s.CatalogId}
	}
	return metadata
}