// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0

package structs

// PeeringToken identifies a peer in order for a connection to be established.
type PeeringToken struct {
	CA                    []string
	ManualServerAddresses []string
	ServerAddresses       []string
	ServerName            string
	PeerID                string
	EstablishmentSecret   string
	Remote                PeeringTokenRemote
}

type PeeringTokenRemote struct {
	Partition  string
	Datacenter string
	Locality   *Locality
}

type IndexedExportedServiceList struct {
	Services map[string]ServiceList
	QueryMeta
}

// NOTE: this is not serialized via msgpack so it can be changed without concern.
type ExportedServiceList struct {
	// Services is a list of exported services that apply to both standard
	// service discovery and service mesh.
	Services []ServiceName

	// DiscoChains is a map of service names to their exported discovery chains
	// for service mesh purposes as defined in the exported-services
	// configuration entry.
	DiscoChains map[ServiceName]ExportedDiscoveryChainInfo
}

// NOTE: this is not serialized via msgpack so it can be changed without concern.
type ExportedDiscoveryChainInfo struct {
	// Protocol is the overall protocol associated with this discovery chain.
	Protocol string

	// TCPTargets is the list of discovery chain targets that are reachable by
	// this discovery chain.
	//
	// NOTE: this is only populated if Protocol=tcp.
	TCPTargets []*DiscoveryTarget
}

func (i ExportedDiscoveryChainInfo) Equal(o ExportedDiscoveryChainInfo) bool {
	switch {
	case i.Protocol != o.Protocol:
		return false
	case len(i.TCPTargets) != len(o.TCPTargets):
		return false
	}

	for j := 0; j < len(i.TCPTargets); j++ {
		if i.TCPTargets[j].ID != o.TCPTargets[j].ID {
			return false
		}
	}

	return true
}

// ListAllDiscoveryChains returns all discovery chains (union of Services and DiscoChains).
func (list *ExportedServiceList) ListAllDiscoveryChains() map[ServiceName]ExportedDiscoveryChainInfo {
	chainsByName := make(map[ServiceName]ExportedDiscoveryChainInfo)
	if list == nil {
		return chainsByName
	}

	for _, svc := range list.Services {
		chainsByName[svc] = list.DiscoChains[svc]
	}
	for chainName, info := range list.DiscoChains {
		chainsByName[chainName] = info
	}
	return chainsByName
}