// Copyright 2017 Istio Authors
//
// 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 adapter

import (
	"fmt"
	"time"

	rpc "istio.io/gogo-genproto/googleapis/google/rpc"

	mixerpb "istio.io/api/mixer/v1"
	"istio.io/istio/mixer/pkg/status"
)

// CheckResult provides return value from check request call on the handler.
type CheckResult struct {
	// The outcome status of the operation.
	Status rpc.Status
	// ValidDuration represents amount of time for which this result can be considered valid.
	ValidDuration time.Duration
	// ValidUseCount represents the number of uses for which this result can be considered valid.
	ValidUseCount int32
	// RouteDirective represents the route directive return result
	RouteDirective *mixerpb.RouteDirective
}

// IsDefault returns true if the CheckResult is in its zero state
func (r *CheckResult) IsDefault() bool {
	return status.IsOK(r.Status) && r.ValidDuration == 0 && r.ValidUseCount == 0 && r.RouteDirective == nil
}

func (r *CheckResult) String() string {
	return fmt.Sprintf("CheckResult: status:%s, duration:%d, usecount:%d", status.String(r.Status), r.ValidDuration, r.ValidUseCount)
}
