// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements.  See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF licenses this file to You 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 types

import (
	"encoding/json"
	"time"
)

// TimeDuration is yet another time.Duration but implements json.Unmarshaler
// and json.Marshaler, yaml.Unmarshaler and yaml.Marshaler interfaces so one
// can use "1h", "5s" and etc in their json/yaml configurations.
//
// Note the format to represent time is same as time.Duration.
// See the comments about time.ParseDuration for more details.
type TimeDuration struct {
	time.Duration `json:",inline"`
}

func (d *TimeDuration) MarshalJSON() ([]byte, error) {
	return json.Marshal(d.Duration.String())
}

func (d *TimeDuration) UnmarshalJSON(data []byte) error {
	var value interface{}
	if err := json.Unmarshal(data, &value); err != nil {
		return err
	}
	switch v := value.(type) {
	case float64:
		d.Duration = time.Duration(v)
	case string:
		dur, err := time.ParseDuration(v)
		if err != nil {
			return err
		}
		d.Duration = dur
	default:
		panic("unknown type")
	}
	return nil
}

func (d *TimeDuration) MarshalYAML() (interface{}, error) {
	return d.Duration.String(), nil
}

func (d *TimeDuration) UnmarshalYAML(unmarshal func(interface{}) error) error {
	var s string
	if err := unmarshal(&s); err != nil {
		return err
	}
	dur, err := time.ParseDuration(s)
	if err != nil {
		return err
	}
	d.Duration = dur
	return nil
}