package pbcommon

import (
	"time"

	"github.com/hashicorp/consul/agent/structs"
	durationpb "google.golang.org/protobuf/types/known/durationpb"
)

// IsRead is always true for QueryOption
func (q *QueryOptions) IsRead() bool {
	return true
}

// AllowStaleRead returns whether a stale read should be allowed
func (q *QueryOptions) AllowStaleRead() bool {
	return q.AllowStale
}

func (q *QueryOptions) TokenSecret() string {
	return q.Token
}

func (q *QueryOptions) SetTokenSecret(s string) {
	q.Token = s
}

// SetToken is needed to implement the structs.QueryOptionsCompat interface
func (q *QueryOptions) SetToken(token string) {
	q.Token = token
}

// SetMinQueryIndex is needed to implement the structs.QueryOptionsCompat interface
func (q *QueryOptions) SetMinQueryIndex(minQueryIndex uint64) {
	q.MinQueryIndex = minQueryIndex
}

// SetMaxQueryTime is needed to implement the structs.QueryOptionsCompat interface
func (q *QueryOptions) SetMaxQueryTime(maxQueryTime time.Duration) {
	q.MaxQueryTime = durationpb.New(maxQueryTime)
}

// SetAllowStale is needed to implement the structs.QueryOptionsCompat interface
func (q *QueryOptions) SetAllowStale(allowStale bool) {
	q.AllowStale = allowStale
}

// SetRequireConsistent is needed to implement the structs.QueryOptionsCompat interface
func (q *QueryOptions) SetRequireConsistent(requireConsistent bool) {
	q.RequireConsistent = requireConsistent
}

// SetUseCache is needed to implement the structs.QueryOptionsCompat interface
func (q *QueryOptions) SetUseCache(useCache bool) {
	q.UseCache = useCache
}

// SetMaxStaleDuration is needed to implement the structs.QueryOptionsCompat interface
func (q *QueryOptions) SetMaxStaleDuration(maxStaleDuration time.Duration) {
	q.MaxStaleDuration = durationpb.New(maxStaleDuration)
}

// SetMaxAge is needed to implement the structs.QueryOptionsCompat interface
func (q *QueryOptions) SetMaxAge(maxAge time.Duration) {
	q.MaxAge = durationpb.New(maxAge)
}

// SetMustRevalidate is needed to implement the structs.QueryOptionsCompat interface
func (q *QueryOptions) SetMustRevalidate(mustRevalidate bool) {
	q.MustRevalidate = mustRevalidate
}

// SetStaleIfError is needed to implement the structs.QueryOptionsCompat interface
func (q *QueryOptions) SetStaleIfError(staleIfError time.Duration) {
	q.StaleIfError = durationpb.New(staleIfError)
}

func (q *QueryOptions) HasTimedOut(start time.Time, rpcHoldTimeout, maxQueryTime, defaultQueryTime time.Duration) (bool, error) {
	// In addition to BlockingTimeout, allow for an additional rpcHoldTimeout buffer
	// in case we need to wait for a leader election.
	return time.Since(start) > rpcHoldTimeout+q.BlockingTimeout(maxQueryTime, defaultQueryTime), nil
}

// BlockingTimeout implements pool.BlockableQuery
func (q *QueryOptions) BlockingTimeout(maxQueryTime, defaultQueryTime time.Duration) time.Duration {
	maxTime := q.MaxQueryTime.AsDuration()
	o := structs.QueryOptions{
		MaxQueryTime:  maxTime,
		MinQueryIndex: q.MinQueryIndex,
	}
	return o.BlockingTimeout(maxQueryTime, defaultQueryTime)
}

// SetFilter is needed to implement the structs.QueryOptionsCompat interface
func (q *QueryOptions) SetFilter(filter string) {
	q.Filter = filter
}

// WriteRequest only applies to writes, always false
//
// IsRead implements structs.RPCInfo
func (w *WriteRequest) IsRead() bool {
	return false
}

// SetTokenSecret implements structs.RPCInfo
func (w *WriteRequest) TokenSecret() string {
	return w.Token
}

// SetTokenSecret implements structs.RPCInfo
func (w *WriteRequest) SetTokenSecret(s string) {
	w.Token = s
}

// AllowStaleRead returns whether a stale read should be allowed
//
// AllowStaleRead implements structs.RPCInfo
func (w *WriteRequest) AllowStaleRead() bool {
	return false
}

// HasTimedOut implements structs.RPCInfo
func (w *WriteRequest) HasTimedOut(start time.Time, rpcHoldTimeout, maxQueryTime, defaultQueryTime time.Duration) (bool, error) {
	return time.Since(start) > rpcHoldTimeout, nil
}

// IsRead implements structs.RPCInfo
func (r *ReadRequest) IsRead() bool {
	return true
}

// AllowStaleRead implements structs.RPCInfo
func (r *ReadRequest) AllowStaleRead() bool {
	// TODO(partitions): plumb this?
	return false
}

// TokenSecret implements structs.RPCInfo
func (r *ReadRequest) TokenSecret() string {
	return r.Token
}

// SetTokenSecret implements structs.RPCInfo
func (r *ReadRequest) SetTokenSecret(token string) {
	r.Token = token
}

// HasTimedOut implements structs.RPCInfo
func (r *ReadRequest) HasTimedOut(start time.Time, rpcHoldTimeout, _, _ time.Duration) (bool, error) {
	return time.Since(start) > rpcHoldTimeout, nil
}

// RequestDatacenter implements structs.RPCInfo
func (td *TargetDatacenter) RequestDatacenter() string {
	return td.Datacenter
}

// SetLastContact is needed to implement the structs.QueryMetaCompat interface
func (q *QueryMeta) SetLastContact(lastContact time.Duration) {
	q.LastContact = durationpb.New(lastContact)
}

// SetKnownLeader is needed to implement the structs.QueryMetaCompat interface
func (q *QueryMeta) SetKnownLeader(knownLeader bool) {
	q.KnownLeader = knownLeader
}

// SetIndex is needed to implement the structs.QueryMetaCompat interface
func (q *QueryMeta) SetIndex(index uint64) {
	q.Index = index
}

// SetConsistencyLevel is needed to implement the structs.QueryMetaCompat interface
func (q *QueryMeta) SetConsistencyLevel(consistencyLevel string) {
	q.ConsistencyLevel = consistencyLevel
}

func (q *QueryMeta) GetBackend() structs.QueryBackend {
	return structs.QueryBackend(0)
}

// SetResultsFilteredByACLs is needed to implement the structs.QueryMetaCompat interface
func (q *QueryMeta) SetResultsFilteredByACLs(v bool) {
	q.ResultsFilteredByACLs = v
}

// IsEmpty returns true if the Locality is unset or contains an empty region and zone.
func (l *Locality) IsEmpty() bool {
	if l == nil {
		return true
	}
	return l.Region == "" && l.Zone == ""
}

// LocalityFromProto converts a protobuf Locality to a struct Locality.
func LocalityFromProto(l *Locality) *structs.Locality {
	if l == nil {
		return nil
	}
	return &structs.Locality{
		Region: l.Region,
		Zone:   l.Zone,
	}
}

// LocalityFromProto converts a struct Locality to a protobuf Locality.
func LocalityToProto(l *structs.Locality) *Locality {
	if l == nil {
		return nil
	}
	return &Locality{
		Region: l.Region,
		Zone:   l.Zone,
	}
}